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Title: Measurement of the Ratio of Branching Fractions B( B c + J/ψτ+ ν τ )/ B ( B c + J / ψ μ + ν μ )

Abstract

A measurement is reported of the ratio of branching fractions R(J/ψ) = B(B+cJ/ψτ+ντ)/B(B+cJ/ψμ+νμ), where the τ+ lepton is identified in the decay mode τ+ → μ+νμ¯ντ. This analysis uses a sample of proton-proton collision data corresponding to 3.0 fb–1 of integrated luminosity recorded with the LHCb experiment at center-of-mass energies of 7 and 8 TeV. A signal is found for the decay B+cJ/ψτ+ντ at a significance of 3 standard deviations corrected for systematic uncertainty, and the ratio of the branching fractions is measured to be R(J/ψ) = 0.71 ± 0.17 (stat) ± 0.18 (syst). This result lies within 2 standard deviations above the range of central values currently predicted by the standard model.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; « less
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
Contributing Org.:
LHCb Collaboration
OSTI Identifier:
1526512
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 120; Journal Issue: 12; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., Archilli, F., d’Argent, P., Arnau Romeu, J., Artamonov, A., Artuso, M., Aslanides, E., Atzeni, M., Auriemma, G., Baalouch, M., Babuschkin, I., Bachmann, S., Back, J. J., Badalov, A., Baesso, C., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barschel, C., Barsuk, S., Barter, W., Baryshnikov, F., Batozskaya, V., Battista, V., Bay, A., Beaucourt, L., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. J., Beliy, N., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Beranek, S., Berezhnoy, A., Bernet, R., Berninghoff, D., Bertholet, E., Bertolin, A., Betancourt, C., Betti, F., Bettler, M. -O., van Beuzekom, M., Bezshyiko, Ia., Bifani, S., Billoir, P., Birnkraut, A., Bizzeti, A., Bjørn, M., Blake, T., Blanc, F., Blusk, S., Bocci, V., Boettcher, T., Bondar, A., Bondar, N., Bordyuzhin, I., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bowen, E., Bozzi, C., Braun, S., Britton, T., Brodzicka, J., Brundu, D., Buchanan, E., Burr, C., Bursche, A., Buytaert, J., Byczynski, W., Cadeddu, S., Cai, H., Calabrese, R., Calladine, R., Calvi, M., Calvo Gomez, M., Camboni, A., Campana, P., Campora Perez, D. H., Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Carvalho Akiba, K., Casse, G., Cassina, L., Cattaneo, M., Cavallero, G., Cenci, R., Chamont, D., Chapman, M. G., Charles, M., Charpentier, Ph., Chatzikonstantinidis, G., Chefdeville, M., Chen, S., Cheung, S. F., Chitic, S. -G., Chobanova, V., Chrzaszcz, M., Chubykin, A., Ciambrone, P., Cid Vidal, X., Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Cogan, J., Cogneras, E., Cogoni, V., Cojocariu, L., Collins, P., Colombo, T., Comerma-Montells, A., Contu, A., Cook, A., Coombs, G., Coquereau, S., Corti, G., Corvo, M., Costa Sobral, C. M., Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Cruz Torres, M., Currie, R., D’Ambrosio, C., Da Cunha Marinho, F., Dall’Occo, E., Dalseno, J., Davis, A., De Aguiar Francisco, O., De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Serio, M., De Simone, P., Dean, C. T., Decamp, D., Del Buono, L., Dembinski, H. -P., Demmer, M., Dendek, A., Derkach, D., Deschamps, O., Dettori, F., Dey, B., Di Canto, A., Di Nezza, P., Dijkstra, H., Dordei, F., Dorigo, M., Dosil Suárez, A., Douglas, L., Dovbnya, A., Dreimanis, K., Dufour, L., Dujany, G., Durante, P., Dzhelyadin, R., Dziewiecki, M., Dziurda, A., Dzyuba, A., Easo, S., Ebert, M., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Ely, S., Esen, S., Evans, H. M., Evans, T., Falabella, A., Farley, N., Farry, S., Fazzini, D., Federici, L., Ferguson, D., Fernandez, G., Fernandez Declara, P., Fernandez Prieto, A., Ferrari, F., Ferreira Rodrigues, F., Ferro-Luzzi, M., Filippov, S., Fini, R. A., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fleuret, F., Fohl, K., Fontana, M., Fontanelli, F., Forshaw, D. C., Forty, R., Franco Lima, V., Frank, M., Frei, C., Fu, J., Funk, W., Furfaro, E., Färber, C., Gabriel, E., Gallas Torreira, A., Galli, D., Gallorini, S., Gambetta, S., Gandelman, M., Gandini, P., Gao, Y., Garcia Martin, L. M., García Pardiñas, J., Garra Tico, J., Garrido, L., Garsed, P. J., Gascon, D., Gaspar, C., Gavardi, L., Gazzoni, G., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Ghez, Ph., Gianì, S., Gibson, V., Girard, O. G., Giubega, L., Gizdov, K., Gligorov, V. V., Golubkov, D., Golutvin, A., Gomes, A., Gorelov, I. V., Gotti, C., Govorkova, E., Grabowski, J. P., Graciani Diaz, R., Granado Cardoso, L. A., Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greim, R., Griffith, P., Grillo, L., Gruber, L., Gruberg Cazon, B. R., Grünberg, O., Gushchin, E., Guz, Yu., Gys, T., Göbel, C., Hadavizadeh, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hamilton, B., Han, X., Hancock, T. H., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Hasse, C., Hatch, M., He, J., Hecker, M., Heinicke, K., Heister, A., Hennessy, K., Henrard, P., Henry, L., van Herwijnen, E., Heß, M., Hicheur, A., Hill, D., Hombach, C., Hopchev, P. H., Hu, W., Huard, Z. C., Hulsbergen, W., Humair, T., Hushchyn, M., Hutchcroft, D., Ibis, P., Idzik, M., Ilten, P., Jacobsson, R., Jalocha, J., Jans, E., Jawahery, A., Jiang, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Karacson, M., Kariuki, J. M., Karodia, S., Kazeev, N., Kecke, M., Keizer, F., Kelsey, M., Kenzie, M., Ketel, T., Khairullin, E., Khanji, B., Khurewathanakul, C., Kirn, T., Klaver, S., Klimaszewski, K., Klimkovich, T., Koliiev, S., Kolpin, M., Kopecna, R., Koppenburg, P., Kosmyntseva, A., Kotriakhova, S., Kozeiha, M., Kravchuk, L., Kreps, M., Kress, F., Krokovny, P., Kruse, F., Krzemien, W., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kuonen, A. K., Kvaratskheliya, T., Lacarrere, D., Lafferty, G., Lai, A., Lanfranchi, G., Langenbruch, C., Latham, T., Lazzeroni, C., Le Gac, R., Leflat, A., Lefrançois, J., Lefèvre, R., Lemaitre, F., Lemos Cid, E., Leroy, O., Lesiak, T., Leverington, B., Li, P. -R., Li, T., Li, Y., Li, Z., Likhomanenko, T., Lindner, R., Lionetto, F., Lisovskyi, V., Liu, X., Loh, D., Loi, A., Longstaff, I., Lopes, J. H., Lucchesi, D., Lucio Martinez, M., Luo, H., Lupato, A., Luppi, E., Lupton, O., Lusiani, A., Lyu, X., Machefert, F., Maciuc, F., Macko, V., Mackowiak, P., Maddrell-Mander, S., Maev, O., Maguire, K., Maisuzenko, D., Majewski, M. W., Malde, S., Malecki, B., Malinin, A., Maltsev, T., Manca, G., Mancinelli, G., Marangotto, D., Maratas, J., Marchand, J. F., Marconi, U., Marin Benito, C., Marinangeli, M., Marino, P., Marks, J., Martellotti, G., Martin, M., Martinelli, M., Martinez Santos, D., Martinez Vidal, F., Massacrier, L. M., Massafferri, A., Matev, R., Mathad, A., Mathe, Z., Matteuzzi, C., Mauri, A., Maurice, E., Maurin, B., Mazurov, A., McCann, M., McNab, A., McNulty, R., Mead, J. V., Meadows, B., Meaux, C., Meier, F., Meinert, N., Melnychuk, D., Merk, M., Merli, A., Michielin, E., Milanes, D. A., Millard, E., Minard, M. -N., Minzoni, L., Mitzel, D. S., Mogini, A., Molina Rodriguez, J., Mombächer, T., Monroy, I. A., Monteil, S., Morandin, M., Morello, M. J., Morgunova, O., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Mulder, M., Müller, D., Müller, J., Müller, K., Müller, V., Naik, P., Nakada, T., Nandakumar, R., Nandi, A., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Nguyen, T. D., Nguyen-Mau, C., Nieswand, S., Niet, R., Nikitin, N., Nikodem, T., Nogay, A., O’Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Oldeman, R., Onderwater, C. J. G., Ossowska, A., Otalora Goicochea, J. M., Owen, P., Oyanguren, A., Pais, P. R., Palano, A., Palutan, M., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Parker, W., Parkes, C., Passaleva, G., Pastore, A., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Pepe Altarelli, M., Perazzini, S., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Petrov, A., Petruzzo, M., Picatoste Olloqui, E., Pietrzyk, B., Pikies, M., Pinci, D., Pisani, F., Pistone, A., Piucci, A., Placinta, V., Playfer, S., Plo Casasus, M., Polci, F., Poli Lener, M., Poluektov, A., Polyakov, I., Polycarpo, E., Pomery, G. J., Ponce, S., Popov, A., Popov, D., Poslavskii, S., Potterat, C., Price, E., Prisciandaro, J., Prouve, C., Pugatch, V., Puig Navarro, A., Pullen, H., Punzi, G., Qian, W., Quagliani, R., Quintana, B., Rachwal, B., Rademacker, J. H., Rama, M., Ramos Pernas, M., Rangel, M. S., Raniuk, I., Ratnikov, F., Raven, G., Ravonel Salzgeber, M., Reboud, M., Redi, F., Reichert, S., dos Reis, A. C., Remon Alepuz, C., Renaudin, V., Ricciardi, S., Richards, S., Rihl, M., Rinnert, K., Rives Molina, V., Robbe, P., Robert, A., Rodrigues, A. B., Rodrigues, E., Rodriguez Lopez, J. A., Rogozhnikov, A., Roiser, S., Rollings, A., Romanovskiy, V., Romero Vidal, A., Ronayne, J. W., Rotondo, M., Rudolph, M. S., Ruf, T., Ruiz Valls, P., Ruiz Vidal, J., Saborido Silva, J. J., Sadykhov, E., Sagidova, N., Saitta, B., Salustino Guimaraes, V., Sanchez Mayordomo, C., Sanmartin Sedes, B., Santacesaria, R., Santamarina Rios, C., Santimaria, M., Santovetti, E., Sarpis, G., Sarti, A., Satriano, C., Satta, A., Saunders, D. M., Savrina, D., Schael, S., Schellenberg, M., Schiller, M., Schindler, H., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schreiner, H. F., Schubiger, M., Schune, M. -H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sepulveda, E. S., Sergi, A., Serra, N., Serrano, J., Sestini, L., Seyfert, P., Shapkin, M., Shapoval, I., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Siddi, B. G., Silva Coutinho, R., Silva de Oliveira, L., Simi, G., Simone, S., Sirendi, M., Skidmore, N., Skwarnicki, T., Smith, E., Smith, I. T., Smith, J., Smith, M., Soares Lavra, l., Sokoloff, M. D., Soler, F. J. P., Souza De Paula, B., Spaan, B., Spradlin, P., Sridharan, S., Stagni, F., Stahl, M., Stahl, S., Stefko, P., Stefkova, S., Steinkamp, O., Stemmle, S., Stenyakin, O., Stepanova, M., Stevens, H., Stone, S., Storaci, B., Stracka, S., Stramaglia, M. E., Straticiuc, M., Straumann, U., Sun, J., Sun, L., Sutcliffe, W., Swientek, K., Syropoulos, V., Szumlak, T., Szymanski, M., T’Jampens, S., Tayduganov, A., Tekampe, T., Tellarini, G., Teubert, F., Thomas, E., van Tilburg, J., Tilley, M. J., Tisserand, V., Tobin, M., Tolk, S., Tomassetti, L., Tonelli, D., Toriello, F., Tourinho Jadallah Aoude, R., Tournefier, E., Traill, M., Tran, M. T., Tresch, M., Trisovic, A., Tsaregorodtsev, A., Tsopelas, P., Tully, A., Tuning, N., Ukleja, A., Usachov, A., Ustyuzhanin, A., Uwer, U., Vacca, C., Vagner, A., Vagnoni, V., Valassi, A., Valat, S., Valenti, G., Vazquez Gomez, R., Vazquez Regueiro, P., Vecchi, S., van Veghel, M., Velthuis, J. J., Veltri, M., Veneziano, G., Venkateswaran, A., Verlage, T. A., Vernet, M., Vesterinen, M., Viana Barbosa, J. V., Viaud, B., Vieira, D., Vieites Diaz, M., Viemann, H., Vilasis-Cardona, X., Vitti, M., Volkov, V., Vollhardt, A., Voneki, B., Vorobyev, A., Vorobyev, V., Voß, C., de Vries, J. A., Vázquez Sierra, C., Waldi, R., Wallace, C., Wallace, R., Walsh, J., Wang, J., Ward, D. R., Wark, H. M., Watson, N. K., Websdale, D., Weiden, A., Weisser, C., Whitehead, M., Wicht, J., Wilkinson, G., Wilkinson, M., Williams, M., Williams, M. P., Williams, M., Williams, T., Wilson, F. F., Wimberley, J., Winn, M., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wraight, K., Wyllie, K., Xie, Y., Xu, M., Xu, Z., Yang, Z., Yang, Z., Yao, Y., Yin, H., Yu, J., Yuan, X., Yushchenko, O., Zarebski, K. A., Zavertyaev, M., Zhang, L., Zhang, Y., Zhelezov, A., Zheng, Y., Zhu, X., Zhukov, V., Zonneveld, J. B., and Zucchelli, S. Measurement of the Ratio of Branching Fractions B(Bc+→J/ψτ+ντ)/B(Bc+→J/ψμ+νμ). United States: N. p., 2018. Web. doi:10.1103/PhysRevLett.120.121801.
Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., Archilli, F., d’Argent, P., Arnau Romeu, J., Artamonov, A., Artuso, M., Aslanides, E., Atzeni, M., Auriemma, G., Baalouch, M., Babuschkin, I., Bachmann, S., Back, J. J., Badalov, A., Baesso, C., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barschel, C., Barsuk, S., Barter, W., Baryshnikov, F., Batozskaya, V., Battista, V., Bay, A., Beaucourt, L., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. J., Beliy, N., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Beranek, S., Berezhnoy, A., Bernet, R., Berninghoff, D., Bertholet, E., Bertolin, A., Betancourt, C., Betti, F., Bettler, M. -O., van Beuzekom, M., Bezshyiko, Ia., Bifani, S., Billoir, P., Birnkraut, A., Bizzeti, A., Bjørn, M., Blake, T., Blanc, F., Blusk, S., Bocci, V., Boettcher, T., Bondar, A., Bondar, N., Bordyuzhin, I., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bowen, E., Bozzi, C., Braun, S., Britton, T., Brodzicka, J., Brundu, D., Buchanan, E., Burr, C., Bursche, A., Buytaert, J., Byczynski, W., Cadeddu, S., Cai, H., Calabrese, R., Calladine, R., Calvi, M., Calvo Gomez, M., Camboni, A., Campana, P., Campora Perez, D. H., Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Carvalho Akiba, K., Casse, G., Cassina, L., Cattaneo, M., Cavallero, G., Cenci, R., Chamont, D., Chapman, M. G., Charles, M., Charpentier, Ph., Chatzikonstantinidis, G., Chefdeville, M., Chen, S., Cheung, S. F., Chitic, S. -G., Chobanova, V., Chrzaszcz, M., Chubykin, A., Ciambrone, P., Cid Vidal, X., Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Cogan, J., Cogneras, E., Cogoni, V., Cojocariu, L., Collins, P., Colombo, T., Comerma-Montells, A., Contu, A., Cook, A., Coombs, G., Coquereau, S., Corti, G., Corvo, M., Costa Sobral, C. M., Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Cruz Torres, M., Currie, R., D’Ambrosio, C., Da Cunha Marinho, F., Dall’Occo, E., Dalseno, J., Davis, A., De Aguiar Francisco, O., De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Serio, M., De Simone, P., Dean, C. T., Decamp, D., Del Buono, L., Dembinski, H. -P., Demmer, M., Dendek, A., Derkach, D., Deschamps, O., Dettori, F., Dey, B., Di Canto, A., Di Nezza, P., Dijkstra, H., Dordei, F., Dorigo, M., Dosil Suárez, A., Douglas, L., Dovbnya, A., Dreimanis, K., Dufour, L., Dujany, G., Durante, P., Dzhelyadin, R., Dziewiecki, M., Dziurda, A., Dzyuba, A., Easo, S., Ebert, M., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Ely, S., Esen, S., Evans, H. M., Evans, T., Falabella, A., Farley, N., Farry, S., Fazzini, D., Federici, L., Ferguson, D., Fernandez, G., Fernandez Declara, P., Fernandez Prieto, A., Ferrari, F., Ferreira Rodrigues, F., Ferro-Luzzi, M., Filippov, S., Fini, R. A., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fleuret, F., Fohl, K., Fontana, M., Fontanelli, F., Forshaw, D. C., Forty, R., Franco Lima, V., Frank, M., Frei, C., Fu, J., Funk, W., Furfaro, E., Färber, C., Gabriel, E., Gallas Torreira, A., Galli, D., Gallorini, S., Gambetta, S., Gandelman, M., Gandini, P., Gao, Y., Garcia Martin, L. M., García Pardiñas, J., Garra Tico, J., Garrido, L., Garsed, P. J., Gascon, D., Gaspar, C., Gavardi, L., Gazzoni, G., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Ghez, Ph., Gianì, S., Gibson, V., Girard, O. G., Giubega, L., Gizdov, K., Gligorov, V. V., Golubkov, D., Golutvin, A., Gomes, A., Gorelov, I. V., Gotti, C., Govorkova, E., Grabowski, J. P., Graciani Diaz, R., Granado Cardoso, L. A., Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greim, R., Griffith, P., Grillo, L., Gruber, L., Gruberg Cazon, B. R., Grünberg, O., Gushchin, E., Guz, Yu., Gys, T., Göbel, C., Hadavizadeh, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hamilton, B., Han, X., Hancock, T. H., Hansmann-Menzemer, S., Harnew, N., Harnew, S. 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@article{osti_1526512,
title = {Measurement of the Ratio of Branching Fractions B(Bc+→J/ψτ+ντ)/B(Bc+→J/ψμ+νμ)},
author = {Aaij, R. and Adeva, B. and Adinolfi, M. and Ajaltouni, Z. and Akar, S. and Albrecht, J. and Alessio, F. and Alexander, M. and Alfonso Albero, A. and Ali, S. and Alkhazov, G. and Alvarez Cartelle, P. and Alves, A. A. and Amato, S. and Amerio, S. and Amhis, Y. and An, L. and Anderlini, L. and Andreassi, G. and Andreotti, M. and Andrews, J. E. and Appleby, R. B. and Archilli, F. and d’Argent, P. and Arnau Romeu, J. and Artamonov, A. and Artuso, M. and Aslanides, E. and Atzeni, M. and Auriemma, G. and Baalouch, M. and Babuschkin, I. and Bachmann, S. and Back, J. J. and Badalov, A. and Baesso, C. and Baker, S. and Balagura, V. and Baldini, W. and Baranov, A. and Barlow, R. J. and Barschel, C. and Barsuk, S. and Barter, W. and Baryshnikov, F. and Batozskaya, V. and Battista, V. and Bay, A. and Beaucourt, L. and Beddow, J. and Bedeschi, F. and Bediaga, I. and Beiter, A. and Bel, L. 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K. and Websdale, D. and Weiden, A. and Weisser, C. and Whitehead, M. and Wicht, J. and Wilkinson, G. and Wilkinson, M. and Williams, M. and Williams, M. P. and Williams, M. and Williams, T. and Wilson, F. F. and Wimberley, J. and Winn, M. and Wishahi, J. and Wislicki, W. and Witek, M. and Wormser, G. and Wotton, S. A. and Wraight, K. and Wyllie, K. and Xie, Y. and Xu, M. and Xu, Z. and Yang, Z. and Yang, Z. and Yao, Y. and Yin, H. and Yu, J. and Yuan, X. and Yushchenko, O. and Zarebski, K. A. and Zavertyaev, M. and Zhang, L. and Zhang, Y. and Zhelezov, A. and Zheng, Y. and Zhu, X. and Zhukov, V. and Zonneveld, J. B. and Zucchelli, S.},
abstractNote = {A measurement is reported of the ratio of branching fractions R(J/ψ) = B(B+c → J/ψτ+ντ)/B(B+c → J/ψμ+νμ), where the τ+ lepton is identified in the decay mode τ+ → μ+νμ¯ντ. This analysis uses a sample of proton-proton collision data corresponding to 3.0 fb–1 of integrated luminosity recorded with the LHCb experiment at center-of-mass energies of 7 and 8 TeV. A signal is found for the decay B+c → J/ψτ+ντ at a significance of 3 standard deviations corrected for systematic uncertainty, and the ratio of the branching fractions is measured to be R(J/ψ) = 0.71 ± 0.17 (stat) ± 0.18 (syst). This result lies within 2 standard deviations above the range of central values currently predicted by the standard model.},
doi = {10.1103/PhysRevLett.120.121801},
journal = {Physical Review Letters},
number = 12,
volume = 120,
place = {United States},
year = {Fri Mar 23 00:00:00 EDT 2018},
month = {Fri Mar 23 00:00:00 EDT 2018}
}

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  • Sjöstrand, Torbjörn; Mrenna, Stephen; Skands, Peter
  • Computer Physics Communications, Vol. 178, Issue 11
  • DOI: 10.1016/j.cpc.2008.01.036

Measurement of the Ratio of Branching Fractions B ( B ¯ 0 D * + τ ν ¯ τ ) / B ( B ¯ 0 D * + μ ν ¯ μ )
journal, September 2015


Charged Higgs effects on exclusive semi-tauonicB decays
journal, June 1995

  • Tanaka, M.
  • Zeitschrift für Physik C Particles and Fields, Vol. 67, Issue 2
  • DOI: 10.1007/BF01571294

Model-independent description of B π l ν decays and a determination of | V u b |
journal, January 2009


Reweighting with Boosted Decision Trees
journal, October 2016


Performance of the LHCb muon system
journal, February 2013


Geant4—a simulation toolkit
journal, July 2003

  • Agostinelli, S.; Allison, J.; Amako, K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3
  • DOI: 10.1016/S0168-9002(03)01368-8

Weak decays of the B c meson to charmonium and D mesons in the relativistic quark model
journal, November 2003


Flavor models for B ¯ D ( * ) τ ν ¯
journal, September 2015


Fitting using finite Monte Carlo samples
journal, October 1993


Handling of the generation of primary events in Gauss, the LHCb simulation framework
conference, October 2010

  • Beiyaev, I.; Brambach, T.; Brook, N. H.
  • 2010 IEEE Nuclear Science Symposium and Medical Imaging Conference (2010 NSS/MIC), IEEE Nuclear Science Symposuim & Medical Imaging Conference
  • DOI: 10.1109/nssmic.2010.5873949

Weak transition form factors between heavy mesons
journal, March 1990


The LHCb Simulation Application, Gauss: Design, Evolution and Experience
journal, December 2011


Semileptonic meson decays in the quark model: An update
journal, September 1995


Observation of the Semileptonic Decays B D * τ ν ¯ τ and Evidence for B D τ ν ¯ τ
journal, January 2008


PHOTOS Monte Carlo: a precision tool for QED correctionsin Z and W decays
journal, January 2006


Test of lepton universality with B0 → K*0ℓ+ℓ− decays
text, January 2017


Review of Particle Physics
text, January 2008


Performance of the LHCb RICH detector at the LHC
journal, May 2013


LHCb detector performance
conference, October 2011

  • Harnew, Neville
  • Proceedings of The 13th International Conference on B-Physics at Hadron Machines — PoS(BEAUTY 2011)
  • DOI: 10.22323/1.129.0024

Review of Particle Physics
text, January 2018


Performance of the LHCb muon system
text, January 2013


Weak decays of heavy mesons in the static quark approximation
journal, November 1989


Semileptonic B decays to excited charmed mesons
journal, January 1998

  • Leibovich, Adam K.; Ligeti, Zoltan; Stewart, Iain W.
  • Physical Review D, Vol. 57, Issue 1
  • DOI: 10.1103/physrevd.57.308

Performance of the LHCb Vertex Locator
conference, October 2012

  • Farinelli, Chiara
  • 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference (2012 NSS/MIC), 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record (NSS/MIC)
  • DOI: 10.1109/nssmic.2012.6551360

Review of Particle Physics
text, January 2012

  • Beringer, J.; Arguin, J.; Barnett, R.
  • Deutsches Elektronen-Synchrotron, DESY, Hamburg
  • DOI: 10.3204/phppubdb-24149

The LHCb Detector at the LHC
text, January 2008

  • Collaboration, LHCb; Bernet, R.; Buechler, A.
  • Institute of Physics Publishing
  • DOI: 10.5167/uzh-15788

Performance of the LHCb RICH detector at the LHC
text, January 2012


LHCb Detector Performance
text, January 2014


Addressing the LHC flavour anomalies with horizontal gauge symmetries
text, January 2015


Reweighting with Boosted Decision Trees
text, January 2016


Kernel Estimation in High-Energy Physics
text, January 2000


Works referencing / citing this record:

A challenge to lepton universality in B meson decays
journal, November 2018


Study of B c J / ψV and ${B}_{c}^{* } \rightarrow {\eta }_{c}V$ decays within the QCD factorization
journal, June 2018

  • Chang, Qin; Chen, Li-Li; Xu, Shuai
  • Journal of Physics G: Nuclear and Particle Physics, Vol. 45, Issue 7
  • DOI: 10.1088/1361-6471/aac732

Review of lepton universality tests in B decays
journal, December 2018

  • Bifani, Simone; Descotes-Genon, Sébastien; Vidal, Antonio Romero
  • Journal of Physics G: Nuclear and Particle Physics, Vol. 46, Issue 2
  • DOI: 10.1088/1361-6471/aaf5de

Predictions of ${B}_{c}\, \rightarrow \,(D,D* )\tau \nu $ decay observables in the standard model and beyond
journal, February 2019


Phenomenology of $\,{{b\to c\tau\bar\nu }}\,$ decays in a scalar leptoquark model
journal, July 2019


Flavour anomalies: a review
journal, December 2018


Angular distribution as an effective probe of new physics in semihadronic three-body meson decays
journal, July 2019


Probing new physics with B ¯ ρ ( 770 ) ν ¯ and B ¯ a 1 ( 1260 ) ν ¯
journal, October 2019


Charged current b c τ ν ¯ τ anomalies in a general W boson scenario
journal, November 2019


B T transition form factors in light-cone sum rules
journal, November 2019


Investigation of effects of new physics in Λ b Λ c τ ν ¯ τ decay
journal, December 2019


Semileptonic decays of B ( * ) , D ( * ) into ν l and pseudoscalar or vector mesons
journal, August 2018


Lepton flavor universality violation in semileptonic tree level weak transitions
journal, June 2019


B c excitations at LHC experiments
journal, December 2019


Quasi-two-body decays Bc → ηc(1S,2S)D0∗+(2400) → ηc(1S,2S)D0π+ in the perturbative QCD approach
journal, November 2019

  • Cui, Bo-Yan; Ma, Ai-Jun; Fan, Ying-Ying
  • International Journal of Modern Physics A, Vol. 34, Issue 33
  • DOI: 10.1142/s0217751x19502221

Experimental status of LNU in B decays in LHCb
journal, January 2019


A challenge to lepton universality in B-meson decays
journal, June 2017

  • Ciezarek, Gregory; Franco Sevilla, Manuel; Hamilton, Brian
  • Nature, Vol. 546, Issue 7657
  • DOI: 10.1038/nature22346

Semileptonic decays of B *, ${B}_{s}^{* }$, and ${B}_{c}^{* }$ with the Bethe–Salpeter method
journal, September 2018

  • Wang, Tianhong; Jiang, Yue; Zhou, Tian
  • Journal of Physics G: Nuclear and Particle Physics, Vol. 45, Issue 11
  • DOI: 10.1088/1361-6471/aae14a

B anomalies in the nonminimal universal extra dimension model
journal, October 2019


Violation of lepton flavor and lepton flavor universality in rare kaon decays
journal, April 2016

  • Crivellin, Andreas; D’Ambrosio, Giancarlo; Hoferichter, Martin
  • Physical Review D, Vol. 93, Issue 7
  • DOI: 10.1103/physrevd.93.074038

Charged Higgs boson contribution to B q ν ¯ and B ¯ ( P , V ) ν ¯ in a generic two-Higgs doublet model
journal, November 2018


R -parity violating solutions to the R D ( * ) anomaly and their GUT-scale unifications
journal, January 2019


Muon g 2 in a U ( 1 ) -symmetric two-Higgs-doublet model
journal, February 2019


Measurement of R ( D ) and R ( D * ) with a Semileptonic Tagging Method
journal, April 2020


Looking for new physics in leptonic and semileptonic decays of B-meson
journal, September 2017

  • Ivanov, M. A.; Körner, J. G.; Tran, C. T.
  • Physics of Particles and Nuclei Letters, Vol. 14, Issue 5
  • DOI: 10.1134/s1547477117050053

$$b \rightarrow c \tau \nu _{\tau }$$ b → c τ ν τ Decays: a catalogue to compare, constrain, and correlate new physics effects
journal, March 2019


Current status of MSSM Higgs sector with LHC 13 TeV data
journal, April 2019

  • Barman, Rahool Kumar; Bhattacherjee, Biplob; Choudhury, Arghya
  • The European Physical Journal Plus, Vol. 134, Issue 4
  • DOI: 10.1140/epjp/i2019-12566-5

Investigating the 331-Z′ mediated FCNC effects on b → sμ+μ− transitions
journal, July 2018

  • Singh, Soram Robertson; Mawlong, Barilang; D’cruz, Ritu
  • International Journal of Modern Physics A, Vol. 33, Issue 21
  • DOI: 10.1142/s0217751x18501257

331-Z′ mediated FCNC effects on b → dμ+μ− transitions
journal, December 2018

  • Singh, Soram Robertson; Mawlong, Barilang
  • International Journal of Modern Physics A, Vol. 33, Issue 36
  • DOI: 10.1142/s0217751x18502251

New physics in inclusive semileptonic B decays including nonperturbative corrections
journal, March 2019


b → cℓν anomalies in light of extended scalar sectors
journal, July 2019

  • Biswas, Aritra; Ghosh, Dilip Kumar; Patra, Sunando Kumar
  • International Journal of Modern Physics A, Vol. 34, Issue 21
  • DOI: 10.1142/s0217751x19501124

Gauging the accidental symmetries of the standard model, and implications for the flavor anomalies
text, January 2020

  • Altmannshofer, Wolfgang; Davighi, Joseph; Nardecchia, Marco
  • Apollo - University of Cambridge Repository
  • DOI: 10.17863/cam.48521

Test lepton flavor universality with (semi)leptonic $D$ decays at BESIII
journal, January 2019


Constraints on models of scalar and vector leptoquarks decaying to a quark and a neutrino at √s =13 TeV
text, January 2018


Impact of polarization observables and Bc→τν on new physics explanations of the b→cτν anomaly
text, January 2019

  • Blanke, Monika; Crivellin, Andreas; De Boer, Stefan
  • American Physical Society
  • DOI: 10.5167/uzh-174374

Hunting for scalar leptoquarks with boosted tops and light leptons
journal, October 2019


Search for pair production of second-generation leptoquarks at s = 13 TeV
journal, February 2019


B-decay anomalies in a composite leptoquark model
journal, December 2016


Measurement of the $B_c^-$ meson production fraction and asymmetry in 7 and 13 TeV $pp$ collisions
text, January 2019


From the Trees to the Forest: A Review of Radiative Neutrino Mass Models
journal, December 2017


Addendum to “Impact of polarization observables and Bc→τν on new physics explanations of the b→cτν anomaly”
text, January 2019

  • Blanke, Monika; Crivellin, Andreas; Kitahara, Teppei
  • American Physical Society
  • DOI: 10.5167/uzh-174367

B Meson Anomalies in a Pati-Salam Model within the Randall-Sundrum Background
text, January 2018


New physics in b s μ + μ : Distinguishing models through C P -violating effects
journal, July 2017

  • Alok, Ashutosh Kumar; Bhattacharya, Bhubanjyoti; Kumar, Dinesh
  • Physical Review D, Vol. 96, Issue 1
  • DOI: 10.1103/physrevd.96.015034

Constraining the minimal flavor violating leptoquark explanation of the R D ( * ) anomaly
journal, February 2019


Test of the R ( D ( * ) ) anomaly at the LHC
journal, April 2019


Averages of b-hadron, c-hadron, and $$\tau $$ τ -lepton properties as of summer 2016
journal, December 2017


Light gauge boson Z ′ and LFV decays of the electroweak gauge boson Z
journal, February 2017


Observation of the Leptonic Decay $D^+ → τ^+ ν_τ$
text, January 2019

  • Ablikim, M.; Achasov, M. N.; Adlarson, P.
  • GSI Helmholtzzentrum fuer Schwerionenforschung, GSI, Darmstadt
  • DOI: 10.15120/gsi-2020-00223

Importance of Loop Effects in Explaining the Accumulated Evidence for New Physics in B Decays with a Vector Leptoquark
text, January 2019

  • Crivellin, Andreas; Greub, Christoph; Saturnino, Francesco
  • American Physical Society
  • DOI: 10.5167/uzh-161915

Precise Predictions of Charmed-Bottom Hadrons from Lattice QCD
text, January 2018

  • Mathur, Nilmani; Padmanath, M.; Mondal, Sourav
  • Universität Regensburg
  • DOI: 10.5283/epub.38353

Violation of lepton flavor and lepton flavor universality in rare kaon decays
text, January 2016

  • Tunstall, Lewis; Hoferichter, Martin; Crivellin, Andreas
  • American Physical Society
  • DOI: 10.7892/boris.86292

Studying low x structure function models with astrophysical tau neutrinos
journal, October 2019


Searching for new physics in semi-leptonic baryon decays
journal, March 2017


Global Constraints on a Heavy Neutrino
text, January 2015


From the trees to the forest: a review of radiative neutrino mass models
text, January 2017


Flavor Physics and Flavor Anomalies in Minimal Fundamental Partial Compositeness
text, January 2017


Flavour anomalies: a review
text, January 2018


Review of Lepton Universality tests in B decays
text, January 2018


Left-Right SU(4) Vector Leptoquark Model for Flavor Anomalies
text, January 2018


$B_c$ excitations at LHC experiments
text, January 2019


Gauge leptoquark as the origin of B-physics anomalies
text, January 2017

  • Di Luzio, Luca; Greljo, Admir; Nardecchia, Marco
  • American Physical Society
  • DOI: 10.5167/uzh-147225