Evidence for a mixed mass composition at the ‘ankle’ in the cosmic-ray spectrum

Aab, A.; Abreu, P.; Aglietta, M.; Ahn, E. J.; Al Samarai, I.; Albuquerque, I. F. M.; Allekotte, I.; Allison, P.; Almela, A.; Alvarez Castillo, J.; Alvarez-Muñiz, J.; Ambrosio, M.; Anastasi, G. A.; Anchordoqui, L.; Andrada, B.; Andringa, S.; Aramo, C.; Arqueros, F.; Arsene, N.; Asorey, H.; Assis, P.; Aublin, J.; Avila, G.; Badescu, A. M.; Balaceanu, A.; Baus, C.; Beatty, J. J.; Becker, K. H.; Bellido, J. A.; Berat, C.; Bertaina, M. E.; Biermann, P. L.; Billoir, P.; Biteau, J.; Blaess, S. G.; Blanco, A.; Blazek, J.; Bleve, C.; Boháčová, M.; Boncioli, D.; Bonifazi, C.; Borodai, N.; Botti, A. M.; Brack, J.; Brancus, I.; Bretz, T.; Bridgeman, A.; Briechle, F. L.; Buchholz, P.; Bueno, A.; Buitink, S.; Buscemi, M.; Caballero-Mora, K. S.; Caccianiga, B.; Caccianiga, L.; Cancio, A.; Canfora, F.; Caramete, L.; Caruso, R.; Castellina, A.; Cataldi, G.; Cazon, L.; Cester, R.; Chavez, A. G.; Chiavassa, A.; Chinellato, J. A.; Chudoba, J.; Clay, R. W.; Colalillo, R.; Coleman, A.; Collica, L.; Coluccia, M. R.; Conceição, R.; Contreras, F.; Cooper, M. J.; Coutu, S.; Covault, C. E.; Cronin, J.; Dallier, R.; D'Amico, S.; Daniel, B.; Dasso, S.; Daumiller, K.; Dawson, B. R.; de Almeida, R. M.; de Jong, S. J.; De Mauro, G.; de Mello Neto, J. R. T.; De Mitri, I.; de Oliveira, J.; de Souza, V.; Debatin, J.; del Peral, L.; Deligny, O.; Di Giulio, C.; Di Matteo, A.; Díaz Castro, M. L.; Diogo, F.; Dobrigkeit, C.; D'Olivo, J. C.; Dorofeev, A.; dos Anjos, R. C.; Dova, M. T.; Dundovic, A.; Ebr, J.; Engel, R.; Erdmann, M.; Erfani, M.; Escobar, C. O.; Espadanal, J.; Etchegoyen, A.; Falcke, H.; Fang, K.; Farrar, G.; Fauth, A. C.; Fazzini, N.; Fick, B.; Figueira, J. M.; Filevich, A.; Filipčič, A.; Fratu, O.; Freire, M. M.; Fujii, T.; Fuster, A.; García, B.; Garcia-Pinto, D.; Gaté, F.; Gemmeke, H.; Gherghel-Lascu, A.; Ghia, P. L.; Giaccari, U.; Giammarchi, M.; Giller, M.; Głas, D.; Glaser, C.; Glass, H.; Golup, G.; Gómez Berisso, M.; Gómez Vitale, P. F.; González, N.; Gookin, B.; Gordon, J.; Gorgi, A.; Gorham, P.; Gouffon, P.; Grillo, A. F.; Grubb, T. D.; Guarino, F.; Guedes, G. P.; Hampel, M. R.; Hansen, P.; Harari, D.; Harrison, T. A.; Harton, J. L.; Hasankiadeh, Q.; Haungs, A.; Hebbeker, T.; Heck, D.; Heimann, P.; Herve, A. E.; Hill, G. C.; Hojvat, C.; Holt, E.; Homola, P.; Hörandel, J. R.; Horvath, P.; Hrabovský, M.; Huege, T.; Hulsman, J.; Insolia, A.; Isar, P. G.; Jandt, I.; Jansen, S.; Johnsen, J. A.; Josebachuili, M.; Kääpä, A.; Kambeitz, O.; Kampert, K. H.; Kasper, P.; Katkov, I.; Keilhauer, B.; Kemp, E.; Kieckhafer, R. M.; Klages, H. O.; Kleifges, M.; Kleinfeller, J.; Krause, R.; Krohm, N.; Kuempel, D.; Kukec Mezek, G.; Kunka, N.; Kuotb Awad, A.; LaHurd, D.; Latronico, L.; Lauscher, M.; Lautridou, P.; Lebrun, P.; Legumina, R.; Leigui de Oliveira, M. A.; Letessier-Selvon, A.; Lhenry-Yvon, I.; Link, K.; Lopes, L.; López, R.; López Casado, A.; Luce, Q.; Lucero, A.; Malacari, M.; Mallamaci, M.; Mandat, D.; Mantsch, P.; Mariazzi, A. G.; Mariş, I. C.; Marsella, G.; Martello, D.; Martinez, H.; Martínez Bravo, O.; Masías Meza, J. J.; Mathes, H. J.; Mathys, S.; Matthews, J.; Matthews, J. A. J.; Matthiae, G.; Mayotte, E.; Mazur, P. O.; Medina, C.; Medina-Tanco, G.; Melo, D.; Menshikov, A.; Messina, S.; Micheletti, M. I.; Middendorf, L.; Minaya, I. A.; Miramonti, L.; Mitrica, B.; Mockler, D.; Molina-Bueno, L.; Mollerach, S.; Montanet, F.; Morello, C.; Mostafá, M.; Müller, G.; Muller, M. A.; Müller, S.; Naranjo, I.; Navas, S.; Nellen, L.; Neuser, J.; Nguyen, P. H.; Niculescu-Oglinzanu, M.; Niechciol, M.; Niemietz, L.; Niggemann, T.; Nitz, D.; Nosek, D.; Novotny, V.; Nožka, H.; Núñez, L. A.; Ochilo, L.; Oikonomou, F.; Olinto, A.; Pakk Selmi-Dei, D.; Palatka, M.; Pallotta, J.; Papenbreer, P.; Parente, G.; Parra, A.; Paul, T.; Pech, M.; Pedreira, F.; Pȩkala, J.; Pelayo, R.; Peña-Rodriguez, J.; Pereira, L. A. S.; Perrone, L.; Peters, C.; Petrera, S.; Phuntsok, J.; Piegaia, R.; Pierog, T.; Pieroni, P.; Pimenta, M.; Pirronello, V.; Platino, M.; Plum, M.; Porowski, C.; Prado, R. R.; Privitera, P.; Prouza, M.; Quel, E. J.; Querchfeld, S.; Quinn, S.; Ramos-Pollant, R.; Rautenberg, J.; Ravel, O.; Ravignani, D.; Reinert, D.; Revenu, B.; Ridky, J.; Risse, M.; Ristori, P.; Rizi, V.; Rodrigues de Carvalho, W.; Rodriguez Fernandez, G.; Rodriguez Rojo, J.; Rodríguez-Frías, M. D.; Rogozin, D.; Rosado, J.; Roth, M.; Roulet, E.; Rovero, A. C.; Saffi, S. J.; Saftoiu, A.; Salazar, H.; Saleh, A.; Salesa Greus, F.; Salina, G.; Sanabria Gomez, J. D.; Sánchez, F.; Sanchez-Lucas, P.; Santos, E. M.; Santos, E.; Sarazin, F.; Sarkar, B.; Sarmento, R.; Sarmiento-Cano, C.; Sato, R.; Scarso, C.; Schauer, M.; Scherini, V.; Schieler, H.; Schmidt, D.; Scholten, O.; Schovánek, P.; Schröder, F. G.; Schulz, A.; Schulz, J.; Schumacher, J.; Sciutto, S. J.; Segreto, A.; Settimo, M.; Shadkam, A.; Shellard, R. C.; Sigl, G.; Silli, G.; Sima, O.; Śmiałkowski, A.; Šmída, R.; Snow, G. R.; Sommers, P.; Sonntag, S.; Sorokin, J.; Squartini, R.; Stanca, D.; Stanič, S.; Stasielak, J.; Strafella, F.; Suarez, F.; Suarez Durán, M.; Sudholz, T.; Suomijärvi, T.; Supanitsky, A. D.; Sutherland, M. S.; Swain, J.; Szadkowski, Z.; Taborda, O. A.; Tapia, A.; Tepe, A.; Theodoro, V. M.; Timmermans, C.; Todero Peixoto, C. J.; Tomankova, L.; Tomé, B.; Tonachini, A.; Torralba Elipe, G.; Torres Machado, D.; Torri, M.; Travnicek, P.; Trini, M.; Ulrich, R.; Unger, M.; Urban, M.; Valbuena-Delgado, A.; Valdés Galicia, J. F.; Valiño, I.; Valore, L.; van Aar, G.; van Bodegom, P.; van den Berg, A. M.; van Vliet, A.; Varela, E.; Vargas Cárdenas, B.; Varner, G.; Vázquez, J. R.; Vázquez, R. A.; Veberič, D.; Verzi, V.; Vicha, J.; Villaseñor, L.; Vorobiov, S.; Wahlberg, H.; Wainberg, O.; Walz, D.; Watson, A. A.; Weber, M.; Weindl, A.; Wiencke, L.; Wilczyński, H.; Winchen, T.; Wittkowski, D.; Wundheiler, B.; Wykes, S.; Yang, L.; Yelos, D.; Younk, P.; Yushkov, A.; Zas, E.; Zavrtanik, D.; Zavrtanik, M.; Zepeda, A.; Zimmermann, B.; Ziolkowski, M.; Zong, Z.; Zuccarello, F.

doi:10.1016/j.physletb.2016.09.039

Title: Evidence for a mixed mass composition at the ‘ankle’ in the cosmic-ray spectrum

Abstract

Here, we report a first measurement for ultra-high energy cosmic rays of the correlation between the depth of shower maximum and the signal in the water Cherenkov stations of air-showers registered simultaneously by the fluorescence and the surface detectors of the Pierre Auger Observatory. Such a correlation measurement is a unique feature of a hybrid air-shower observatory with sensitivity to both the electromagnetic and muonic components. It allows an accurate determination of the spread of primary masses in the cosmic-ray flux. Up till now, constraints on the spread of primary masses have been dominated by systematic uncertainties. The present correlation measurement is not affected by systematics in the measurement of the depth of shower maximum or the signal in the water Cherenkov stations. The analysis relies on general characteristics of air showers and is thus robust also with respect to uncertainties in hadronic event generators. The observed correlation in the energy range around the `ankle' at $$\lg(E/{\rm eV})=18.5-19.0$$ differs significantly from expectations for pure primary cosmic-ray compositions. A light composition made up of proton and helium only is equally inconsistent with observations. The data are explained well by a mixed composition including nuclei with mass $A > 4$. Scenarios such as the proton dip model, with almost pure compositions, are thus disfavoured as the sole explanation of the ultrahigh-energy cosmic-ray flux at Earth.

Authors:: Aab, A.; Abreu, P.; Aglietta, M.; Ahn, E. J.; Al Samarai, I.; Albuquerque, I. F. M.; Allekotte, I.; Allison, P.; Almela, A.; Alvarez Castillo, J.; Alvarez-Muñiz, J.; Ambrosio, M.; Anastasi, G. A.; Anchordoqui, L.; Andrada, B.; Andringa, S.; Aramo, C.; Arqueros, F.; Arsene, N.; Asorey, H. more »« less

Publication Date:: Tue Nov 01 00:00:00 EDT 2016

Research Org.:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Org.:: Pierre Auger Collaboration

OSTI Identifier:: 1476956

Alternate Identifier(s):: OSTI ID: 1327487

Report Number(s):: FERMILAB-PUB-16-412-AD-AE-CD-TD; arXiv:1609.08567
Journal ID: ISSN 0370-2693; S0370269316305433; PII: S0370269316305433

Grant/Contract Number:: AC02-07CH11359; FR02-04ER41300; FG02-99ER41107; SC0011689

Resource Type:: Published Article

Journal Name:: Physics Letters B

Additional Journal Information:: Journal Name: Physics Letters B Journal Volume: 762 Journal Issue: C; Journal ID: ISSN 0370-2693

Publisher:: Elsevier

Country of Publication:: Netherlands

Language:: English

Subject:: 79 ASTRONOMY AND ASTROPHYSICS; Pierre Auger Observatory; cosmic rays; mass composition; ankle

Citation Formats


                    Aab, A., Abreu, P., Aglietta, M., Ahn, E. J., Al Samarai, I., Albuquerque, I. F. M., Allekotte, I., Allison, P., Almela, A., Alvarez Castillo, J., Alvarez-Muñiz, J., Ambrosio, M., Anastasi, G. A., Anchordoqui, L., Andrada, B., Andringa, S., Aramo, C., Arqueros, F., Arsene, N., Asorey, H., Assis, P., Aublin, J., Avila, G., Badescu, A. M., Balaceanu, A., Baus, C., Beatty, J. J., Becker, K. H., Bellido, J. A., Berat, C., Bertaina, M. E., Biermann, P. L., Billoir, P., Biteau, J., Blaess, S. G., Blanco, A., Blazek, J., Bleve, C., Boháčová, M., Boncioli, D., Bonifazi, C., Borodai, N., Botti, A. M., Brack, J., Brancus, I., Bretz, T., Bridgeman, A., Briechle, F. L., Buchholz, P., Bueno, A., Buitink, S., Buscemi, M., Caballero-Mora, K. S., Caccianiga, B., Caccianiga, L., Cancio, A., Canfora, F., Caramete, L., Caruso, R., Castellina, A., Cataldi, G., Cazon, L., Cester, R., Chavez, A. G., Chiavassa, A., Chinellato, J. A., Chudoba, J., Clay, R. W., Colalillo, R., Coleman, A., Collica, L., Coluccia, M. R., Conceição, R., Contreras, F., Cooper, M. J., Coutu, S., Covault, C. E., Cronin, J., Dallier, R., D'Amico, S., Daniel, B., Dasso, S., Daumiller, K., Dawson, B. R., de Almeida, R. M., de Jong, S. J., De Mauro, G., de Mello Neto, J. R. T., De Mitri, I., de Oliveira, J., de Souza, V., Debatin, J., del Peral, L., Deligny, O., Di Giulio, C., Di Matteo, A., Díaz Castro, M. L., Diogo, F., Dobrigkeit, C., D'Olivo, J. C., Dorofeev, A., dos Anjos, R. C., Dova, M. T., Dundovic, A., Ebr, J., Engel, R., Erdmann, M., Erfani, M., Escobar, C. O., Espadanal, J., Etchegoyen, A., Falcke, H., Fang, K., Farrar, G., Fauth, A. C., Fazzini, N., Fick, B., Figueira, J. M., Filevich, A., Filipčič, A., Fratu, O., Freire, M. M., Fujii, T., Fuster, A., García, B., Garcia-Pinto, D., Gaté, F., Gemmeke, H., Gherghel-Lascu, A., Ghia, P. L., Giaccari, U., Giammarchi, M., Giller, M., Głas, D., Glaser, C., Glass, H., Golup, G., Gómez Berisso, M., Gómez Vitale, P. F., González, N., Gookin, B., Gordon, J., Gorgi, A., Gorham, P., Gouffon, P., Grillo, A. F., Grubb, T. D., Guarino, F., Guedes, G. P., Hampel, M. R., Hansen, P., Harari, D., Harrison, T. A., Harton, J. L., Hasankiadeh, Q., Haungs, A., Hebbeker, T., Heck, D., Heimann, P., Herve, A. E., Hill, G. C., Hojvat, C., Holt, E., Homola, P., Hörandel, J. R., Horvath, P., Hrabovský, M., Huege, T., Hulsman, J., Insolia, A., Isar, P. G., Jandt, I., Jansen, S., Johnsen, J. A., Josebachuili, M., Kääpä, A., Kambeitz, O., Kampert, K. H., Kasper, P., Katkov, I., Keilhauer, B., Kemp, E., Kieckhafer, R. M., Klages, H. O., Kleifges, M., Kleinfeller, J., Krause, R., Krohm, N., Kuempel, D., Kukec Mezek, G., Kunka, N., Kuotb Awad, A., LaHurd, D., Latronico, L., Lauscher, M., Lautridou, P., Lebrun, P., Legumina, R., Leigui de Oliveira, M. A., Letessier-Selvon, A., Lhenry-Yvon, I., Link, K., Lopes, L., López, R., López Casado, A., Luce, Q., Lucero, A., Malacari, M., Mallamaci, M., Mandat, D., Mantsch, P., Mariazzi, A. G., Mariş, I. C., Marsella, G., Martello, D., Martinez, H., Martínez Bravo, O., Masías Meza, J. J., Mathes, H. J., Mathys, S., Matthews, J., Matthews, J. A. J., Matthiae, G., Mayotte, E., Mazur, P. O., Medina, C., Medina-Tanco, G., Melo, D., Menshikov, A., Messina, S., Micheletti, M. I., Middendorf, L., Minaya, I. A., Miramonti, L., Mitrica, B., Mockler, D., Molina-Bueno, L., Mollerach, S., Montanet, F., Morello, C., Mostafá, M., Müller, G., Muller, M. A., Müller, S., Naranjo, I., Navas, S., Nellen, L., Neuser, J., Nguyen, P. H., Niculescu-Oglinzanu, M., Niechciol, M., Niemietz, L., Niggemann, T., Nitz, D., Nosek, D., Novotny, V., Nožka, H., Núñez, L. A., Ochilo, L., Oikonomou, F., Olinto, A., Pakk Selmi-Dei, D., Palatka, M., Pallotta, J., Papenbreer, P., Parente, G., Parra, A., Paul, T., Pech, M., Pedreira, F., Pȩkala, J., Pelayo, R., Peña-Rodriguez, J., Pereira, L. A. S., Perrone, L., Peters, C., Petrera, S., Phuntsok, J., Piegaia, R., Pierog, T., Pieroni, P., Pimenta, M., Pirronello, V., Platino, M., Plum, M., Porowski, C., Prado, R. R., Privitera, P., Prouza, M., Quel, E. J., Querchfeld, S., Quinn, S., Ramos-Pollant, R., Rautenberg, J., Ravel, O., Ravignani, D., Reinert, D., Revenu, B., Ridky, J., Risse, M., Ristori, P., Rizi, V., Rodrigues de Carvalho, W., Rodriguez Fernandez, G., Rodriguez Rojo, J., Rodríguez-Frías, M. D., Rogozin, D., Rosado, J., Roth, M., Roulet, E., Rovero, A. C., Saffi, S. J., Saftoiu, A., Salazar, H., Saleh, A., Salesa Greus, F., Salina, G., Sanabria Gomez, J. D., Sánchez, F., Sanchez-Lucas, P., Santos, E. M., Santos, E., Sarazin, F., Sarkar, B., Sarmento, R., Sarmiento-Cano, C., Sato, R., Scarso, C., Schauer, M., Scherini, V., Schieler, H., Schmidt, D., Scholten, O., Schovánek, P., Schröder, F. G., Schulz, A., Schulz, J., Schumacher, J., Sciutto, S. J., Segreto, A., Settimo, M., Shadkam, A., Shellard, R. C., Sigl, G., Silli, G., Sima, O., Śmiałkowski, A., Šmída, R., Snow, G. R., Sommers, P., Sonntag, S., Sorokin, J., Squartini, R., Stanca, D., Stanič, S., Stasielak, J., Strafella, F., Suarez, F., Suarez Durán, M., Sudholz, T., Suomijärvi, T., Supanitsky, A. D., Sutherland, M. S., Swain, J., Szadkowski, Z., Taborda, O. A., Tapia, A., Tepe, A., Theodoro, V. M., Timmermans, C., Todero Peixoto, C. J., Tomankova, L., Tomé, B., Tonachini, A., Torralba Elipe, G., Torres Machado, D., Torri, M., Travnicek, P., Trini, M., Ulrich, R., Unger, M., Urban, M., Valbuena-Delgado, A., Valdés Galicia, J. F., Valiño, I., Valore, L., van Aar, G., van Bodegom, P., van den Berg, A. M., van Vliet, A., Varela, E., Vargas Cárdenas, B., Varner, G., Vázquez, J. R., Vázquez, R. A., Veberič, D., Verzi, V., Vicha, J., Villaseñor, L., Vorobiov, S., Wahlberg, H., Wainberg, O., Walz, D., Watson, A. A., Weber, M., Weindl, A., Wiencke, L., Wilczyński, H., Winchen, T., Wittkowski, D., Wundheiler, B., Wykes, S., Yang, L., Yelos, D., Younk, P., Yushkov, A., Zas, E., Zavrtanik, D., Zavrtanik, M., Zepeda, A., Zimmermann, B., Ziolkowski, M., Zong, Z., and Zuccarello, F. Evidence for a mixed mass composition at the ‘ankle’ in the cosmic-ray spectrum.  Netherlands: N. p., 2016. 
Web.  doi:10.1016/j.physletb.2016.09.039.

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                    Aab, A., Abreu, P., Aglietta, M., Ahn, E. J., Al Samarai, I., Albuquerque, I. F. M., Allekotte, I., Allison, P., Almela, A., Alvarez Castillo, J., Alvarez-Muñiz, J., Ambrosio, M., Anastasi, G. A., Anchordoqui, L., Andrada, B., Andringa, S., Aramo, C., Arqueros, F., Arsene, N., Asorey, H., Assis, P., Aublin, J., Avila, G., Badescu, A. M., Balaceanu, A., Baus, C., Beatty, J. J., Becker, K. H., Bellido, J. A., Berat, C., Bertaina, M. E., Biermann, P. L., Billoir, P., Biteau, J., Blaess, S. G., Blanco, A., Blazek, J., Bleve, C., Boháčová, M., Boncioli, D., Bonifazi, C., Borodai, N., Botti, A. M., Brack, J., Brancus, I., Bretz, T., Bridgeman, A., Briechle, F. L., Buchholz, P., Bueno, A., Buitink, S., Buscemi, M., Caballero-Mora, K. S., Caccianiga, B., Caccianiga, L., Cancio, A., Canfora, F., Caramete, L., Caruso, R., Castellina, A., Cataldi, G., Cazon, L., Cester, R., Chavez, A. G., Chiavassa, A., Chinellato, J. A., Chudoba, J., Clay, R. W., Colalillo, R., Coleman, A., Collica, L., Coluccia, M. R., Conceição, R., Contreras, F., Cooper, M. J., Coutu, S., Covault, C. E., Cronin, J., Dallier, R., D'Amico, S., Daniel, B., Dasso, S., Daumiller, K., Dawson, B. R., de Almeida, R. M., de Jong, S. J., De Mauro, G., de Mello Neto, J. R. T., De Mitri, I., de Oliveira, J., de Souza, V., Debatin, J., del Peral, L., Deligny, O., Di Giulio, C., Di Matteo, A., Díaz Castro, M. L., Diogo, F., Dobrigkeit, C., D'Olivo, J. C., Dorofeev, A., dos Anjos, R. C., Dova, M. T., Dundovic, A., Ebr, J., Engel, R., Erdmann, M., Erfani, M., Escobar, C. O., Espadanal, J., Etchegoyen, A., Falcke, H., Fang, K., Farrar, G., Fauth, A. C., Fazzini, N., Fick, B., Figueira, J. M., Filevich, A., Filipčič, A., Fratu, O., Freire, M. M., Fujii, T., Fuster, A., García, B., Garcia-Pinto, D., Gaté, F., Gemmeke, H., Gherghel-Lascu, A., Ghia, P. L., Giaccari, U., Giammarchi, M., Giller, M., Głas, D., Glaser, C., Glass, H., Golup, G., Gómez Berisso, M., Gómez Vitale, P. F., González, N., Gookin, B., Gordon, J., Gorgi, A., Gorham, P., Gouffon, P., Grillo, A. F., Grubb, T. D., Guarino, F., Guedes, G. P., Hampel, M. R., Hansen, P., Harari, D., Harrison, T. A., Harton, J. L., Hasankiadeh, Q., Haungs, A., Hebbeker, T., Heck, D., Heimann, P., Herve, A. E., Hill, G. C., Hojvat, C., Holt, E., Homola, P., Hörandel, J. R., Horvath, P., Hrabovský, M., Huege, T., Hulsman, J., Insolia, A., Isar, P. G., Jandt, I., Jansen, S., Johnsen, J. A., Josebachuili, M., Kääpä, A., Kambeitz, O., Kampert, K. H., Kasper, P., Katkov, I., Keilhauer, B., Kemp, E., Kieckhafer, R. M., Klages, H. O., Kleifges, M., Kleinfeller, J., Krause, R., Krohm, N., Kuempel, D., Kukec Mezek, G., Kunka, N., Kuotb Awad, A., LaHurd, D., Latronico, L., Lauscher, M., Lautridou, P., Lebrun, P., Legumina, R., Leigui de Oliveira, M. A., Letessier-Selvon, A., Lhenry-Yvon, I., Link, K., Lopes, L., López, R., López Casado, A., Luce, Q., Lucero, A., Malacari, M., Mallamaci, M., Mandat, D., Mantsch, P., Mariazzi, A. G., Mariş, I. C., Marsella, G., Martello, D., Martinez, H., Martínez Bravo, O., Masías Meza, J. J., Mathes, H. J., Mathys, S., Matthews, J., Matthews, J. A. J., Matthiae, G., Mayotte, E., Mazur, P. O., Medina, C., Medina-Tanco, G., Melo, D., Menshikov, A., Messina, S., Micheletti, M. I., Middendorf, L., Minaya, I. A., Miramonti, L., Mitrica, B., Mockler, D., Molina-Bueno, L., Mollerach, S., Montanet, F., Morello, C., Mostafá, M., Müller, G., Muller, M. A., Müller, S., Naranjo, I., Navas, S., Nellen, L., Neuser, J., Nguyen, P. H., Niculescu-Oglinzanu, M., Niechciol, M., Niemietz, L., Niggemann, T., Nitz, D., Nosek, D., Novotny, V., Nožka, H., Núñez, L. A., Ochilo, L., Oikonomou, F., Olinto, A., Pakk Selmi-Dei, D., Palatka, M., Pallotta, J., Papenbreer, P., Parente, G., Parra, A., Paul, T., Pech, M., Pedreira, F., Pȩkala, J., Pelayo, R., Peña-Rodriguez, J., Pereira, L. A. S., Perrone, L., Peters, C., Petrera, S., Phuntsok, J., Piegaia, R., Pierog, T., Pieroni, P., Pimenta, M., Pirronello, V., Platino, M., Plum, M., Porowski, C., Prado, R. R., Privitera, P., Prouza, M., Quel, E. J., Querchfeld, S., Quinn, S., Ramos-Pollant, R., Rautenberg, J., Ravel, O., Ravignani, D., Reinert, D., Revenu, B., Ridky, J., Risse, M., Ristori, P., Rizi, V., Rodrigues de Carvalho, W., Rodriguez Fernandez, G., Rodriguez Rojo, J., Rodríguez-Frías, M. D., Rogozin, D., Rosado, J., Roth, M., Roulet, E., Rovero, A. C., Saffi, S. J., Saftoiu, A., Salazar, H., Saleh, A., Salesa Greus, F., Salina, G., Sanabria Gomez, J. D., Sánchez, F., Sanchez-Lucas, P., Santos, E. M., Santos, E., Sarazin, F., Sarkar, B., Sarmento, R., Sarmiento-Cano, C., Sato, R., Scarso, C., Schauer, M., Scherini, V., Schieler, H., Schmidt, D., Scholten, O., Schovánek, P., Schröder, F. G., Schulz, A., Schulz, J., Schumacher, J., Sciutto, S. J., Segreto, A., Settimo, M., Shadkam, A., Shellard, R. C., Sigl, G., Silli, G., Sima, O., Śmiałkowski, A., Šmída, R., Snow, G. R., Sommers, P., Sonntag, S., Sorokin, J., Squartini, R., Stanca, D., Stanič, S., Stasielak, J., Strafella, F., Suarez, F., Suarez Durán, M., Sudholz, T., Suomijärvi, T., Supanitsky, A. D., Sutherland, M. S., Swain, J., Szadkowski, Z., Taborda, O. A., Tapia, A., Tepe, A., Theodoro, V. M., Timmermans, C., Todero Peixoto, C. J., Tomankova, L., Tomé, B., Tonachini, A., Torralba Elipe, G., Torres Machado, D., Torri, M., Travnicek, P., Trini, M., Ulrich, R., Unger, M., Urban, M., Valbuena-Delgado, A., Valdés Galicia, J. F., Valiño, I., Valore, L., van Aar, G., van Bodegom, P., van den Berg, A. M., van Vliet, A., Varela, E., Vargas Cárdenas, B., Varner, G., Vázquez, J. R., Vázquez, R. A., Veberič, D., Verzi, V., Vicha, J., Villaseñor, L., Vorobiov, S., Wahlberg, H., Wainberg, O., Walz, D., Watson, A. A., Weber, M., Weindl, A., Wiencke, L., Wilczyński, H., Winchen, T., Wittkowski, D., Wundheiler, B., Wykes, S., Yang, L., Yelos, D., Younk, P., Yushkov, A., Zas, E., Zavrtanik, D., Zavrtanik, M., Zepeda, A., Zimmermann, B., Ziolkowski, M., Zong, Z., & Zuccarello, F. Evidence for a mixed mass composition at the ‘ankle’ in the cosmic-ray spectrum.  Netherlands.  https://doi.org/10.1016/j.physletb.2016.09.039

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                    Aab, A., Abreu, P., Aglietta, M., Ahn, E. J., Al Samarai, I., Albuquerque, I. F. M., Allekotte, I., Allison, P., Almela, A., Alvarez Castillo, J., Alvarez-Muñiz, J., Ambrosio, M., Anastasi, G. A., Anchordoqui, L., Andrada, B., Andringa, S., Aramo, C., Arqueros, F., Arsene, N., Asorey, H., Assis, P., Aublin, J., Avila, G., Badescu, A. M., Balaceanu, A., Baus, C., Beatty, J. J., Becker, K. H., Bellido, J. A., Berat, C., Bertaina, M. E., Biermann, P. L., Billoir, P., Biteau, J., Blaess, S. G., Blanco, A., Blazek, J., Bleve, C., Boháčová, M., Boncioli, D., Bonifazi, C., Borodai, N., Botti, A. M., Brack, J., Brancus, I., Bretz, T., Bridgeman, A., Briechle, F. L., Buchholz, P., Bueno, A., Buitink, S., Buscemi, M., Caballero-Mora, K. S., Caccianiga, B., Caccianiga, L., Cancio, A., Canfora, F., Caramete, L., Caruso, R., Castellina, A., Cataldi, G., Cazon, L., Cester, R., Chavez, A. G., Chiavassa, A., Chinellato, J. A., Chudoba, J., Clay, R. W., Colalillo, R., Coleman, A., Collica, L., Coluccia, M. R., Conceição, R., Contreras, F., Cooper, M. J., Coutu, S., Covault, C. E., Cronin, J., Dallier, R., D'Amico, S., Daniel, B., Dasso, S., Daumiller, K., Dawson, B. R., de Almeida, R. M., de Jong, S. J., De Mauro, G., de Mello Neto, J. R. T., De Mitri, I., de Oliveira, J., de Souza, V., Debatin, J., del Peral, L., Deligny, O., Di Giulio, C., Di Matteo, A., Díaz Castro, M. L., Diogo, F., Dobrigkeit, C., D'Olivo, J. C., Dorofeev, A., dos Anjos, R. C., Dova, M. T., Dundovic, A., Ebr, J., Engel, R., Erdmann, M., Erfani, M., Escobar, C. O., Espadanal, J., Etchegoyen, A., Falcke, H., Fang, K., Farrar, G., Fauth, A. C., Fazzini, N., Fick, B., Figueira, J. M., Filevich, A., Filipčič, A., Fratu, O., Freire, M. M., Fujii, T., Fuster, A., García, B., Garcia-Pinto, D., Gaté, F., Gemmeke, H., Gherghel-Lascu, A., Ghia, P. L., Giaccari, U., Giammarchi, M., Giller, M., Głas, D., Glaser, C., Glass, H., Golup, G., Gómez Berisso, M., Gómez Vitale, P. F., González, N., Gookin, B., Gordon, J., Gorgi, A., Gorham, P., Gouffon, P., Grillo, A. F., Grubb, T. D., Guarino, F., Guedes, G. P., Hampel, M. R., Hansen, P., Harari, D., Harrison, T. A., Harton, J. L., Hasankiadeh, Q., Haungs, A., Hebbeker, T., Heck, D., Heimann, P., Herve, A. E., Hill, G. C., Hojvat, C., Holt, E., Homola, P., Hörandel, J. R., Horvath, P., Hrabovský, M., Huege, T., Hulsman, J., Insolia, A., Isar, P. G., Jandt, I., Jansen, S., Johnsen, J. A., Josebachuili, M., Kääpä, A., Kambeitz, O., Kampert, K. H., Kasper, P., Katkov, I., Keilhauer, B., Kemp, E., Kieckhafer, R. M., Klages, H. O., Kleifges, M., Kleinfeller, J., Krause, R., Krohm, N., Kuempel, D., Kukec Mezek, G., Kunka, N., Kuotb Awad, A., LaHurd, D., Latronico, L., Lauscher, M., Lautridou, P., Lebrun, P., Legumina, R., Leigui de Oliveira, M. A., Letessier-Selvon, A., Lhenry-Yvon, I., Link, K., Lopes, L., López, R., López Casado, A., Luce, Q., Lucero, A., Malacari, M., Mallamaci, M., Mandat, D., Mantsch, P., Mariazzi, A. G., Mariş, I. C., Marsella, G., Martello, D., Martinez, H., Martínez Bravo, O., Masías Meza, J. J., Mathes, H. J., Mathys, S., Matthews, J., Matthews, J. A. J., Matthiae, G., Mayotte, E., Mazur, P. O., Medina, C., Medina-Tanco, G., Melo, D., Menshikov, A., Messina, S., Micheletti, M. I., Middendorf, L., Minaya, I. A., Miramonti, L., Mitrica, B., Mockler, D., Molina-Bueno, L., Mollerach, S., Montanet, F., Morello, C., Mostafá, M., Müller, G., Muller, M. A., Müller, S., Naranjo, I., Navas, S., Nellen, L., Neuser, J., Nguyen, P. H., Niculescu-Oglinzanu, M., Niechciol, M., Niemietz, L., Niggemann, T., Nitz, D., Nosek, D., Novotny, V., Nožka, H., Núñez, L. A., Ochilo, L., Oikonomou, F., Olinto, A., Pakk Selmi-Dei, D., Palatka, M., Pallotta, J., Papenbreer, P., Parente, G., Parra, A., Paul, T., Pech, M., Pedreira, F., Pȩkala, J., Pelayo, R., Peña-Rodriguez, J., Pereira, L. A. S., Perrone, L., Peters, C., Petrera, S., Phuntsok, J., Piegaia, R., Pierog, T., Pieroni, P., Pimenta, M., Pirronello, V., Platino, M., Plum, M., Porowski, C., Prado, R. R., Privitera, P., Prouza, M., Quel, E. J., Querchfeld, S., Quinn, S., Ramos-Pollant, R., Rautenberg, J., Ravel, O., Ravignani, D., Reinert, D., Revenu, B., Ridky, J., Risse, M., Ristori, P., Rizi, V., Rodrigues de Carvalho, W., Rodriguez Fernandez, G., Rodriguez Rojo, J., Rodríguez-Frías, M. D., Rogozin, D., Rosado, J., Roth, M., Roulet, E., Rovero, A. C., Saffi, S. J., Saftoiu, A., Salazar, H., Saleh, A., Salesa Greus, F., Salina, G., Sanabria Gomez, J. D., Sánchez, F., Sanchez-Lucas, P., Santos, E. M., Santos, E., Sarazin, F., Sarkar, B., Sarmento, R., Sarmiento-Cano, C., Sato, R., Scarso, C., Schauer, M., Scherini, V., Schieler, H., Schmidt, D., Scholten, O., Schovánek, P., Schröder, F. G., Schulz, A., Schulz, J., Schumacher, J., Sciutto, S. J., Segreto, A., Settimo, M., Shadkam, A., Shellard, R. C., Sigl, G., Silli, G., Sima, O., Śmiałkowski, A., Šmída, R., Snow, G. R., Sommers, P., Sonntag, S., Sorokin, J., Squartini, R., Stanca, D., Stanič, S., Stasielak, J., Strafella, F., Suarez, F., Suarez Durán, M., Sudholz, T., Suomijärvi, T., Supanitsky, A. D., Sutherland, M. S., Swain, J., Szadkowski, Z., Taborda, O. A., Tapia, A., Tepe, A., Theodoro, V. M., Timmermans, C., Todero Peixoto, C. J., Tomankova, L., Tomé, B., Tonachini, A., Torralba Elipe, G., Torres Machado, D., Torri, M., Travnicek, P., Trini, M., Ulrich, R., Unger, M., Urban, M., Valbuena-Delgado, A., Valdés Galicia, J. F., Valiño, I., Valore, L., van Aar, G., van Bodegom, P., van den Berg, A. M., van Vliet, A., Varela, E., Vargas Cárdenas, B., Varner, G., Vázquez, J. R., Vázquez, R. A., Veberič, D., Verzi, V., Vicha, J., Villaseñor, L., Vorobiov, S., Wahlberg, H., Wainberg, O., Walz, D., Watson, A. A., Weber, M., Weindl, A., Wiencke, L., Wilczyński, H., Winchen, T., Wittkowski, D., Wundheiler, B., Wykes, S., Yang, L., Yelos, D., Younk, P., Yushkov, A., Zas, E., Zavrtanik, D., Zavrtanik, M., Zepeda, A., Zimmermann, B., Ziolkowski, M., Zong, Z., and Zuccarello, F. Tue .  
"Evidence for a mixed mass composition at the ‘ankle’ in the cosmic-ray spectrum".  Netherlands.  https://doi.org/10.1016/j.physletb.2016.09.039.

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@article{osti_1476956,

  title        = {Evidence for a mixed mass composition at the ‘ankle’ in the cosmic-ray spectrum},

  author       = {Aab, A. and Abreu, P. and Aglietta, M. and Ahn, E. J. and Al Samarai, I. and Albuquerque, I. F. M. and Allekotte, I. and Allison, P. and Almela, A. and Alvarez Castillo, J. and Alvarez-Muñiz, J. and Ambrosio, M. and Anastasi, G. A. and Anchordoqui, L. and Andrada, B. and Andringa, S. and Aramo, C. and Arqueros, F. and Arsene, N. and Asorey, H. and Assis, P. and Aublin, J. and Avila, G. and Badescu, A. M. and Balaceanu, A. and Baus, C. and Beatty, J. J. and Becker, K. H. and Bellido, J. A. and Berat, C. and Bertaina, M. E. and Biermann, P. L. and Billoir, P. and Biteau, J. and Blaess, S. G. and Blanco, A. and Blazek, J. and Bleve, C. and Boháčová, M. and Boncioli, D. and Bonifazi, C. and Borodai, N. and Botti, A. M. and Brack, J. and Brancus, I. and Bretz, T. and Bridgeman, A. and Briechle, F. L. and Buchholz, P. and Bueno, A. and Buitink, S. and Buscemi, M. and Caballero-Mora, K. S. and Caccianiga, B. and Caccianiga, L. and Cancio, A. and Canfora, F. and Caramete, L. and Caruso, R. and Castellina, A. and Cataldi, G. and Cazon, L. and Cester, R. and Chavez, A. G. and Chiavassa, A. and Chinellato, J. A. and Chudoba, J. and Clay, R. W. and Colalillo, R. and Coleman, A. and Collica, L. and Coluccia, M. R. and Conceição, R. and Contreras, F. and Cooper, M. J. and Coutu, S. and Covault, C. E. and Cronin, J. and Dallier, R. and D'Amico, S. and Daniel, B. and Dasso, S. and Daumiller, K. and Dawson, B. R. and de Almeida, R. M. and de Jong, S. J. and De Mauro, G. and de Mello Neto, J. R. T. and De Mitri, I. and de Oliveira, J. and de Souza, V. and Debatin, J. and del Peral, L. and Deligny, O. and Di Giulio, C. and Di Matteo, A. and Díaz Castro, M. L. and Diogo, F. and Dobrigkeit, C. and D'Olivo, J. C. and Dorofeev, A. and dos Anjos, R. C. and Dova, M. T. and Dundovic, A. and Ebr, J. and Engel, R. and Erdmann, M. and Erfani, M. and Escobar, C. O. and Espadanal, J. and Etchegoyen, A. and Falcke, H. and Fang, K. and Farrar, G. and Fauth, A. C. and Fazzini, N. and Fick, B. and Figueira, J. M. and Filevich, A. and Filipčič, A. and Fratu, O. and Freire, M. M. and Fujii, T. and Fuster, A. and García, B. and Garcia-Pinto, D. and Gaté, F. and Gemmeke, H. and Gherghel-Lascu, A. and Ghia, P. L. and Giaccari, U. and Giammarchi, M. and Giller, M. and Głas, D. and Glaser, C. and Glass, H. and Golup, G. and Gómez Berisso, M. and Gómez Vitale, P. F. and González, N. and Gookin, B. and Gordon, J. and Gorgi, A. and Gorham, P. and Gouffon, P. and Grillo, A. F. and Grubb, T. D. and Guarino, F. and Guedes, G. P. and Hampel, M. R. and Hansen, P. and Harari, D. and Harrison, T. A. and Harton, J. L. and Hasankiadeh, Q. and Haungs, A. and Hebbeker, T. and Heck, D. and Heimann, P. and Herve, A. E. and Hill, G. C. and Hojvat, C. and Holt, E. and Homola, P. and Hörandel, J. R. and Horvath, P. and Hrabovský, M. and Huege, T. and Hulsman, J. and Insolia, A. and Isar, P. G. and Jandt, I. and Jansen, S. and Johnsen, J. A. and Josebachuili, M. and Kääpä, A. and Kambeitz, O. and Kampert, K. H. and Kasper, P. and Katkov, I. and Keilhauer, B. and Kemp, E. and Kieckhafer, R. M. and Klages, H. O. and Kleifges, M. and Kleinfeller, J. and Krause, R. and Krohm, N. and Kuempel, D. and Kukec Mezek, G. and Kunka, N. and Kuotb Awad, A. and LaHurd, D. and Latronico, L. and Lauscher, M. and Lautridou, P. and Lebrun, P. and Legumina, R. and Leigui de Oliveira, M. A. and Letessier-Selvon, A. and Lhenry-Yvon, I. and Link, K. and Lopes, L. and López, R. and López Casado, A. and Luce, Q. and Lucero, A. and Malacari, M. and Mallamaci, M. and Mandat, D. and Mantsch, P. and Mariazzi, A. G. and Mariş, I. C. and Marsella, G. and Martello, D. and Martinez, H. and Martínez Bravo, O. and Masías Meza, J. J. and Mathes, H. J. and Mathys, S. and Matthews, J. and Matthews, J. A. J. and Matthiae, G. and Mayotte, E. and Mazur, P. O. and Medina, C. and Medina-Tanco, G. and Melo, D. and Menshikov, A. and Messina, S. and Micheletti, M. I. and Middendorf, L. and Minaya, I. A. and Miramonti, L. and Mitrica, B. and Mockler, D. and Molina-Bueno, L. and Mollerach, S. and Montanet, F. and Morello, C. and Mostafá, M. and Müller, G. and Muller, M. A. and Müller, S. and Naranjo, I. and Navas, S. and Nellen, L. and Neuser, J. and Nguyen, P. H. and Niculescu-Oglinzanu, M. and Niechciol, M. and Niemietz, L. and Niggemann, T. and Nitz, D. and Nosek, D. and Novotny, V. and Nožka, H. and Núñez, L. A. and Ochilo, L. and Oikonomou, F. and Olinto, A. and Pakk Selmi-Dei, D. and Palatka, M. and Pallotta, J. and Papenbreer, P. and Parente, G. and Parra, A. and Paul, T. and Pech, M. and Pedreira, F. and Pȩkala, J. and Pelayo, R. and Peña-Rodriguez, J. and Pereira, L. A. S. and Perrone, L. and Peters, C. and Petrera, S. and Phuntsok, J. and Piegaia, R. and Pierog, T. and Pieroni, P. and Pimenta, M. and Pirronello, V. and Platino, M. and Plum, M. and Porowski, C. and Prado, R. R. and Privitera, P. and Prouza, M. and Quel, E. J. and Querchfeld, S. and Quinn, S. and Ramos-Pollant, R. and Rautenberg, J. and Ravel, O. and Ravignani, D. and Reinert, D. and Revenu, B. and Ridky, J. and Risse, M. and Ristori, P. and Rizi, V. and Rodrigues de Carvalho, W. and Rodriguez Fernandez, G. and Rodriguez Rojo, J. and Rodríguez-Frías, M. D. and Rogozin, D. and Rosado, J. and Roth, M. and Roulet, E. and Rovero, A. C. and Saffi, S. J. and Saftoiu, A. and Salazar, H. and Saleh, A. and Salesa Greus, F. and Salina, G. and Sanabria Gomez, J. D. and Sánchez, F. and Sanchez-Lucas, P. and Santos, E. M. and Santos, E. and Sarazin, F. and Sarkar, B. and Sarmento, R. and Sarmiento-Cano, C. and Sato, R. and Scarso, C. and Schauer, M. and Scherini, V. and Schieler, H. and Schmidt, D. and Scholten, O. and Schovánek, P. and Schröder, F. G. and Schulz, A. and Schulz, J. and Schumacher, J. and Sciutto, S. J. and Segreto, A. and Settimo, M. and Shadkam, A. and Shellard, R. C. and Sigl, G. and Silli, G. and Sima, O. and Śmiałkowski, A. and Šmída, R. and Snow, G. R. and Sommers, P. and Sonntag, S. and Sorokin, J. and Squartini, R. and Stanca, D. and Stanič, S. and Stasielak, J. and Strafella, F. and Suarez, F. and Suarez Durán, M. and Sudholz, T. and Suomijärvi, T. and Supanitsky, A. D. and Sutherland, M. S. and Swain, J. and Szadkowski, Z. and Taborda, O. A. and Tapia, A. and Tepe, A. and Theodoro, V. M. and Timmermans, C. and Todero Peixoto, C. J. and Tomankova, L. and Tomé, B. and Tonachini, A. and Torralba Elipe, G. and Torres Machado, D. and Torri, M. and Travnicek, P. and Trini, M. and Ulrich, R. and Unger, M. and Urban, M. and Valbuena-Delgado, A. and Valdés Galicia, J. F. and Valiño, I. and Valore, L. and van Aar, G. and van Bodegom, P. and van den Berg, A. M. and van Vliet, A. and Varela, E. and Vargas Cárdenas, B. and Varner, G. and Vázquez, J. R. and Vázquez, R. A. and Veberič, D. and Verzi, V. and Vicha, J. and Villaseñor, L. and Vorobiov, S. and Wahlberg, H. and Wainberg, O. and Walz, D. and Watson, A. A. and Weber, M. and Weindl, A. and Wiencke, L. and Wilczyński, H. and Winchen, T. and Wittkowski, D. and Wundheiler, B. and Wykes, S. and Yang, L. and Yelos, D. and Younk, P. and Yushkov, A. and Zas, E. and Zavrtanik, D. and Zavrtanik, M. and Zepeda, A. and Zimmermann, B. and Ziolkowski, M. and Zong, Z. and Zuccarello, F.},

  abstractNote = {Here, we report a first measurement for ultra-high energy cosmic rays of the correlation between the depth of shower maximum and the signal in the water Cherenkov stations of air-showers registered simultaneously by the fluorescence and the surface detectors of the Pierre Auger Observatory. Such a correlation measurement is a unique feature of a hybrid air-shower observatory with sensitivity to both the electromagnetic and muonic components. It allows an accurate determination of the spread of primary masses in the cosmic-ray flux. Up till now, constraints on the spread of primary masses have been dominated by systematic uncertainties. The present correlation measurement is not affected by systematics in the measurement of the depth of shower maximum or the signal in the water Cherenkov stations. The analysis relies on general characteristics of air showers and is thus robust also with respect to uncertainties in hadronic event generators. The observed correlation in the energy range around the `ankle' at $\lg(E/{\rm eV})=18.5-19.0$ differs significantly from expectations for pure primary cosmic-ray compositions. A light composition made up of proton and helium only is equally inconsistent with observations. The data are explained well by a mixed composition including nuclei with mass $A > 4$. Scenarios such as the proton dip model, with almost pure compositions, are thus disfavoured as the sole explanation of the ultrahigh-energy cosmic-ray flux at Earth.},

  doi          = {10.1016/j.physletb.2016.09.039},

  journal      = {Physics Letters B},

  number       = C,

  volume       = 762,

  place        = {Netherlands},

  year         = {Tue Nov 01 00:00:00 EDT 2016},

  month        = {Tue Nov 01 00:00:00 EDT 2016}

}

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https://doi.org/10.1016/j.physletb.2016.09.039

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Recent results from the Pierre Auger Observatory on the mass composition and hadronic interactions of ultra-high energy cosmic rays
journal, January 2017

Yushkov, Alexey
EPJ Web of Conferences, Vol. 145
DOI: 10.1051/epjconf/201714505002

On the efficiency of the evaluation of the primary cosmic ray composition using lateral distributions of air shower electromagnetic component
journal, February 2019

Raikin, Roman; Serebryakova, Tatyana; Volkov, Nikolay
Journal of Physics: Conference Series, Vol. 1181
DOI: 10.1088/1742-6596/1181/1/012032

Acceleration and propagation of ultra-high energy cosmic rays
journal, November 2017

Aloisio, Roberto
Progress of Theoretical and Experimental Physics, Vol. 2017, Issue 12
DOI: 10.1093/ptep/ptx115

Prompt neutrino fluxes in the atmosphere with PROSA parton distribution functions
journal, May 2017

Garzelli, M. V.; Moch, S.; Zenaiev, O.
Journal of High Energy Physics, Vol. 2017, Issue 5
DOI: 10.1007/jhep05(2017)004

The differential cosmic ray energy flux in the light of an ultrarelativistic generalized Lorentzian thermodynamics
journal, January 2018

Treumann, R. A.; Baumjohann, W.
Astrophysics and Space Science, Vol. 363, Issue 2
DOI: 10.1007/s10509-018-3255-8

Multi-messenger astrophysics
journal, October 2019

Mészáros, Péter; Fox, Derek B.; Hanna, Chad
Nature Reviews Physics, Vol. 1, Issue 10
DOI: 10.1038/s42254-019-0101-z

Probing the origin of ultra-high-energy cosmic rays with neutrinos in the EeV energy range using the Pierre Auger Observatory
journal, October 2019

Aab, A.; Abreu, P.; Aglietta, M.
Journal of Cosmology and Astroparticle Physics, Vol. 2019, Issue 10
DOI: 10.1088/1475-7516/2019/10/022

Impact of using the ultrahigh-energy cosmic ray arrival energies to constrain source associations
journal, January 2019

Capel, Francesca; Mortlock, Daniel J.
Monthly Notices of the Royal Astronomical Society, Vol. 484, Issue 2
DOI: 10.1093/mnras/stz081

Performance and science reach of the Probe of Extreme Multimessenger Astrophysics for ultrahigh-energy particles
journal, January 2020

Anchordoqui, Luis A.; Bergman, Douglas R.; Bertaina, Mario E.
Physical Review D, Vol. 101, Issue 2
DOI: 10.1103/physrevd.101.023012

Acceleration of ultrahigh-energy cosmic rays in starburst superwinds
journal, March 2018

Anchordoqui, Luis Alfredo
Physical Review D, Vol. 97, Issue 6
DOI: 10.1103/physrevd.97.063010

Nuclear Physics Meets the Sources of the Ultra-High Energy Cosmic Rays
text, January 2017

Boncioli, Denise; Fedynitch, Anatoli; Winter, Walter
Deutsches Elektronen-Synchrotron, DESY, Hamburg
DOI: 10.3204/pubdb-2017-08954

A New View on Auger Data and Cosmogenic Neutrinos in Light of Different Nuclear Disintegration and Air-shower Models
journal, March 2019

Heinze, Jonas; Fedynitch, Anatoli; Boncioli, Denise
The Astrophysical Journal, Vol. 873, Issue 1
DOI: 10.3847/1538-4357/ab05ce

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Title: Evidence for a mixed mass composition at the ‘ankle’ in the cosmic-ray spectrum

Abstract

Citation Formats

Recent results from the Pierre Auger Observatory on the mass composition and hadronic interactions of ultra-high energy cosmic rays journal, January 2017

On the efficiency of the evaluation of the primary cosmic ray composition using lateral distributions of air shower electromagnetic component journal, February 2019

Acceleration and propagation of ultra-high energy cosmic rays journal, November 2017

Prompt neutrino fluxes in the atmosphere with PROSA parton distribution functions journal, May 2017

The differential cosmic ray energy flux in the light of an ultrarelativistic generalized Lorentzian thermodynamics journal, January 2018

Multi-messenger astrophysics journal, October 2019

Probing the origin of ultra-high-energy cosmic rays with neutrinos in the EeV energy range using the Pierre Auger Observatory journal, October 2019

Impact of using the ultrahigh-energy cosmic ray arrival energies to constrain source associations journal, January 2019

Performance and science reach of the Probe of Extreme Multimessenger Astrophysics for ultrahigh-energy particles journal, January 2020

Acceleration of ultrahigh-energy cosmic rays in starburst superwinds journal, March 2018

Nuclear Physics Meets the Sources of the Ultra-High Energy Cosmic Rays text, January 2017

A New View on Auger Data and Cosmogenic Neutrinos in Light of Different Nuclear Disintegration and Air-shower Models journal, March 2019

Recent results from the Pierre Auger Observatory on the mass composition and hadronic interactions of ultra-high energy cosmic rays
journal, January 2017

On the efficiency of the evaluation of the primary cosmic ray composition using lateral distributions of air shower electromagnetic component
journal, February 2019

Acceleration and propagation of ultra-high energy cosmic rays
journal, November 2017

Prompt neutrino fluxes in the atmosphere with PROSA parton distribution functions
journal, May 2017

The differential cosmic ray energy flux in the light of an ultrarelativistic generalized Lorentzian thermodynamics
journal, January 2018

Multi-messenger astrophysics
journal, October 2019

Probing the origin of ultra-high-energy cosmic rays with neutrinos in the EeV energy range using the Pierre Auger Observatory
journal, October 2019

Impact of using the ultrahigh-energy cosmic ray arrival energies to constrain source associations
journal, January 2019

Performance and science reach of the Probe of Extreme Multimessenger Astrophysics for ultrahigh-energy particles
journal, January 2020

Acceleration of ultrahigh-energy cosmic rays in starburst superwinds
journal, March 2018

Nuclear Physics Meets the Sources of the Ultra-High Energy Cosmic Rays
text, January 2017

A New View on Auger Data and Cosmogenic Neutrinos in Light of Different Nuclear Disintegration and Air-shower Models
journal, March 2019