Nuclear Dependence of the Transverse-Single-Spin Asymmetry for Forward Neutron Production in Polarized Collisions at
Abstract
We report that during 2015 the Relativistic Heavy Ion Collider (RHIC) provided collisions of transversely polarized protons with Au and Al nuclei for the first time, enabling the exploration of transverse-single-spin asymmetries with heavy nuclei. Large single-spin asymmetries in very forward neutron production have been previously observed in transversely polarized p+p collisions at RHIC, and the existing theoretical framework that was successful in describing the single-spin asymmetry in p+p collisions predicts only a moderate atomic-mass-number (A) dependence. In contrast, the asymmetries observed at RHIC in p+A collisions showed a surprisingly strong A dependence in inclusive forward neutron production. The observed asymmetry in p+Al collisions is much smaller, while the asymmetry in p+Au collisions is a factor of three larger in absolute value and of opposite sign. Lastly, the interplay of different neutron production mechanisms is discussed as a possible explanation of the observed A dependence.
- Authors:
- more »
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Contributing Org.:
- PHENIX Collaboration
- OSTI Identifier:
- 1416077
- Alternate Identifier(s):
- OSTI ID: 1413950
- Report Number(s):
- BNL-114783-2017-JA
Journal ID: ISSN 0031-9007; PRLTAO; 022001
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Published Article
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Name: Physical Review Letters Journal Volume: 120 Journal Issue: 2; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Citation Formats
Aidala, C., Akiba, Y., Alfred, M., Andrieux, V., Aoki, K., Apadula, N., Asano, H., Ayuso, C., Azmoun, B., Babintsev, V., Bagoly, A., Bandara, N. S., Barish, K. N., Bathe, S., Bazilevsky, A., Beaumier, M., Belmont, R., Berdnikov, A., Berdnikov, Y., Blau, D. S., Boer, M., Bok, J. S., Brooks, M. L., Bryslawskyj, J., Bumazhnov, V., Butler, C., Campbell, S., Canoa Roman, V., Cervantes, R., Chi, C. Y., Chiu, M., Choi, I. J., Choi, J. B., Citron, Z., Connors, M., Cronin, N., Csanád, M., Csörgő, T., Danley, T. W., Daugherity, M. S., David, G., DeBlasio, K., Dehmelt, K., Denisov, A., Deshpande, A., Desmond, E. J., Dion, A., Dixit, D., Do, J. H., Drees, A., Drees, K. A., Dumancic, M., Durham, J. M., Durum, A., Elder, T., Enokizono, A., En’yo, H., Esumi, S., Fadem, B., Fan, W., Feege, N., Fields, D. E., Finger, M., Finger, M., Fokin, S. L., Frantz, J. E., Franz, A., Frawley, A. D., Fukuda, Y., Gal, C., Gallus, P., Garg, P., Ge, H., Giordano, F., Goto, Y., Grau, N., Greene, S. V., Grosse Perdekamp, M., Gunji, T., Guragain, H., Hachiya, T., Haggerty, J. S., Hahn, K. I., Hamagaki, H., Hamilton, H. F., Han, S. Y., Hanks, J., Hasegawa, S., Haseler, T. O. S., He, X., Hemmick, T. K., Hill, J. C., Hill, K., Hollis, R. S., Homma, K., Hong, B., Hoshino, T., Hotvedt, N., Huang, J., Huang, S., Imai, K., Imrek, J., Inaba, M., Iordanova, A., Isenhower, D., Ito, Y., Ivanishchev, D., Jacak, B. V., Jezghani, M., Ji, Z., Jiang, X., Johnson, B. M., Jorjadze, V., Jouan, D., Jumper, D. S., Kang, J. H., Kapukchyan, D., Karthas, S., Kawall, D., Kazantsev, A. V., Khachatryan, V., Khanzadeev, A., Kim, C., Kim, D. J., Kim, E. -J., Kim, M., Kim, M. H., Kincses, D., Kistenev, E., Klatsky, J., Kline, P., Koblesky, T., Kotov, D., Kudo, S., Kurita, K., Kwon, Y., Lajoie, J. G., Lallow, E. O., Lebedev, A., Lee, S., Leitch, M. J., Leung, Y. H., Lewis, N. A., Li, X., Lim, S. H., Liu, L. D., Liu, M. X., Loggins, V. -R., Lökös, S., Lovasz, K., Lynch, D., Majoros, T., Makdisi, Y. I., Makek, M., Malaev, M., Manko, V. I., Mannel, E., Masuda, H., McCumber, M., McGaughey, P. L., McGlinchey, D., McKinney, C., Mendoza, M., Metzger, W. J., Mignerey, A. C., Mihalik, D. E., Milov, A., Mishra, D. K., Mitchell, J. T., Mitsuka, G., Miyasaka, S., Mizuno, S., Montuenga, P., Moon, T., Morrison, D. P., Morrow, S. I. M., Murakami, T., Murata, J., Nagai, K., Nagashima, K., Nagashima, T., Nagle, J. L., Nagy, M. I., Nakagawa, I., Nakagomi, H., Nakano, K., Nattrass, C., Niida, T., Nouicer, R., Novák, T., Novitzky, N., Novotny, R., Nyanin, A. S., O’Brien, E., Ogilvie, C. A., Orjuela Koop, J. D., Osborn, J. D., Oskarsson, A., Ottino, G. J., Ozawa, K., Pantuev, V., Papavassiliou, V., Park, J. S., Park, S., Pate, S. F., Patel, M., Peng, W., Perepelitsa, D. V., Perera, G. D. N., Peressounko, D. Yu., PerezLara, C. E., Perry, J., Petti, R., Phipps, M., Pinkenburg, C., Pisani, R. P., Pun, A., Purschke, M. L., Radzevich, P. V., Read, K. F., Reynolds, D., Riabov, V., Riabov, Y., Richford, D., Rinn, T., Rolnick, S. D., Rosati, M., Rowan, Z., Runchey, J., Safonov, A. S., Sakaguchi, T., Sako, H., Samsonov, V., Sarsour, M., Sato, K., Sato, S., Schaefer, B., Schmoll, B. K., Sedgwick, K., Seidl, R., Sen, A., Seto, R., Sexton, A., Sharma, D., Shein, I., Shibata, T. -A., Shigaki, K., Shimomura, M., Shioya, T., Shukla, P., Sickles, A., Silva, C. L., Silvermyr, D., Singh, B. K., Singh, C. P., Singh, V., Skoby, M. J., Slunečka, M., Smith, K. L., Snowball, M., Soltz, R. A., Sondheim, W. E., Sorensen, S. P., Sourikova, I. V., Stankus, P. W., Stoll, S. P., Sugitate, T., Sukhanov, A., Sumita, T., Sun, J., Syed, S., Sziklai, J., Takeda, A., Tanida, K., Tannenbaum, M. J., Tarafdar, S., Taranenko, A., Tarnai, G., Tieulent, R., Timilsina, A., Todoroki, T., Tomášek, M., Towell, C. L., Towell, R. S., Tserruya, I., Ueda, Y., Ujvari, B., van Hecke, H. W., Vazquez-Carson, S., Velkovska, J., Virius, M., Vrba, V., Vukman, N., Wang, X. R., Wang, Z., Watanabe, Y., Watanabe, Y. S., Wong, C. P., Woody, C. L., Xu, C., Xu, Q., Xue, L., Yalcin, S., Yamaguchi, Y. L., Yamamoto, H., Yanovich, A., Yin, P., Yoo, J. H., Yoon, I., Yu, H., Yushmanov, I. E., Zajc, W. A., Zelenski, A., Zharko, S., Zou, L., and PHENIX Collaboration. Nuclear Dependence of the Transverse-Single-Spin Asymmetry for Forward Neutron Production in Polarized p + A Collisions at s N N = 200 GeV. United States: N. p., 2018.
Web. doi:10.1103/PhysRevLett.120.022001.
Aidala, C., Akiba, Y., Alfred, M., Andrieux, V., Aoki, K., Apadula, N., Asano, H., Ayuso, C., Azmoun, B., Babintsev, V., Bagoly, A., Bandara, N. S., Barish, K. N., Bathe, S., Bazilevsky, A., Beaumier, M., Belmont, R., Berdnikov, A., Berdnikov, Y., Blau, D. S., Boer, M., Bok, J. S., Brooks, M. L., Bryslawskyj, J., Bumazhnov, V., Butler, C., Campbell, S., Canoa Roman, V., Cervantes, R., Chi, C. Y., Chiu, M., Choi, I. J., Choi, J. B., Citron, Z., Connors, M., Cronin, N., Csanád, M., Csörgő, T., Danley, T. W., Daugherity, M. S., David, G., DeBlasio, K., Dehmelt, K., Denisov, A., Deshpande, A., Desmond, E. J., Dion, A., Dixit, D., Do, J. H., Drees, A., Drees, K. A., Dumancic, M., Durham, J. M., Durum, A., Elder, T., Enokizono, A., En’yo, H., Esumi, S., Fadem, B., Fan, W., Feege, N., Fields, D. E., Finger, M., Finger, M., Fokin, S. L., Frantz, J. E., Franz, A., Frawley, A. D., Fukuda, Y., Gal, C., Gallus, P., Garg, P., Ge, H., Giordano, F., Goto, Y., Grau, N., Greene, S. V., Grosse Perdekamp, M., Gunji, T., Guragain, H., Hachiya, T., Haggerty, J. S., Hahn, K. I., Hamagaki, H., Hamilton, H. F., Han, S. Y., Hanks, J., Hasegawa, S., Haseler, T. O. S., He, X., Hemmick, T. K., Hill, J. C., Hill, K., Hollis, R. S., Homma, K., Hong, B., Hoshino, T., Hotvedt, N., Huang, J., Huang, S., Imai, K., Imrek, J., Inaba, M., Iordanova, A., Isenhower, D., Ito, Y., Ivanishchev, D., Jacak, B. V., Jezghani, M., Ji, Z., Jiang, X., Johnson, B. M., Jorjadze, V., Jouan, D., Jumper, D. S., Kang, J. H., Kapukchyan, D., Karthas, S., Kawall, D., Kazantsev, A. V., Khachatryan, V., Khanzadeev, A., Kim, C., Kim, D. J., Kim, E. -J., Kim, M., Kim, M. H., Kincses, D., Kistenev, E., Klatsky, J., Kline, P., Koblesky, T., Kotov, D., Kudo, S., Kurita, K., Kwon, Y., Lajoie, J. G., Lallow, E. O., Lebedev, A., Lee, S., Leitch, M. J., Leung, Y. H., Lewis, N. A., Li, X., Lim, S. H., Liu, L. D., Liu, M. X., Loggins, V. -R., Lökös, S., Lovasz, K., Lynch, D., Majoros, T., Makdisi, Y. I., Makek, M., Malaev, M., Manko, V. I., Mannel, E., Masuda, H., McCumber, M., McGaughey, P. L., McGlinchey, D., McKinney, C., Mendoza, M., Metzger, W. J., Mignerey, A. C., Mihalik, D. E., Milov, A., Mishra, D. K., Mitchell, J. T., Mitsuka, G., Miyasaka, S., Mizuno, S., Montuenga, P., Moon, T., Morrison, D. P., Morrow, S. I. M., Murakami, T., Murata, J., Nagai, K., Nagashima, K., Nagashima, T., Nagle, J. L., Nagy, M. I., Nakagawa, I., Nakagomi, H., Nakano, K., Nattrass, C., Niida, T., Nouicer, R., Novák, T., Novitzky, N., Novotny, R., Nyanin, A. S., O’Brien, E., Ogilvie, C. A., Orjuela Koop, J. D., Osborn, J. D., Oskarsson, A., Ottino, G. J., Ozawa, K., Pantuev, V., Papavassiliou, V., Park, J. S., Park, S., Pate, S. F., Patel, M., Peng, W., Perepelitsa, D. V., Perera, G. D. N., Peressounko, D. Yu., PerezLara, C. E., Perry, J., Petti, R., Phipps, M., Pinkenburg, C., Pisani, R. P., Pun, A., Purschke, M. L., Radzevich, P. V., Read, K. F., Reynolds, D., Riabov, V., Riabov, Y., Richford, D., Rinn, T., Rolnick, S. D., Rosati, M., Rowan, Z., Runchey, J., Safonov, A. S., Sakaguchi, T., Sako, H., Samsonov, V., Sarsour, M., Sato, K., Sato, S., Schaefer, B., Schmoll, B. K., Sedgwick, K., Seidl, R., Sen, A., Seto, R., Sexton, A., Sharma, D., Shein, I., Shibata, T. -A., Shigaki, K., Shimomura, M., Shioya, T., Shukla, P., Sickles, A., Silva, C. L., Silvermyr, D., Singh, B. K., Singh, C. P., Singh, V., Skoby, M. J., Slunečka, M., Smith, K. L., Snowball, M., Soltz, R. A., Sondheim, W. E., Sorensen, S. P., Sourikova, I. V., Stankus, P. W., Stoll, S. P., Sugitate, T., Sukhanov, A., Sumita, T., Sun, J., Syed, S., Sziklai, J., Takeda, A., Tanida, K., Tannenbaum, M. J., Tarafdar, S., Taranenko, A., Tarnai, G., Tieulent, R., Timilsina, A., Todoroki, T., Tomášek, M., Towell, C. L., Towell, R. S., Tserruya, I., Ueda, Y., Ujvari, B., van Hecke, H. W., Vazquez-Carson, S., Velkovska, J., Virius, M., Vrba, V., Vukman, N., Wang, X. R., Wang, Z., Watanabe, Y., Watanabe, Y. S., Wong, C. P., Woody, C. L., Xu, C., Xu, Q., Xue, L., Yalcin, S., Yamaguchi, Y. L., Yamamoto, H., Yanovich, A., Yin, P., Yoo, J. H., Yoon, I., Yu, H., Yushmanov, I. E., Zajc, W. A., Zelenski, A., Zharko, S., Zou, L., & PHENIX Collaboration. Nuclear Dependence of the Transverse-Single-Spin Asymmetry for Forward Neutron Production in Polarized p + A Collisions at s N N = 200 GeV. United States. https://doi.org/10.1103/PhysRevLett.120.022001
Aidala, C., Akiba, Y., Alfred, M., Andrieux, V., Aoki, K., Apadula, N., Asano, H., Ayuso, C., Azmoun, B., Babintsev, V., Bagoly, A., Bandara, N. S., Barish, K. N., Bathe, S., Bazilevsky, A., Beaumier, M., Belmont, R., Berdnikov, A., Berdnikov, Y., Blau, D. S., Boer, M., Bok, J. S., Brooks, M. L., Bryslawskyj, J., Bumazhnov, V., Butler, C., Campbell, S., Canoa Roman, V., Cervantes, R., Chi, C. Y., Chiu, M., Choi, I. J., Choi, J. B., Citron, Z., Connors, M., Cronin, N., Csanád, M., Csörgő, T., Danley, T. W., Daugherity, M. S., David, G., DeBlasio, K., Dehmelt, K., Denisov, A., Deshpande, A., Desmond, E. J., Dion, A., Dixit, D., Do, J. H., Drees, A., Drees, K. A., Dumancic, M., Durham, J. M., Durum, A., Elder, T., Enokizono, A., En’yo, H., Esumi, S., Fadem, B., Fan, W., Feege, N., Fields, D. E., Finger, M., Finger, M., Fokin, S. L., Frantz, J. E., Franz, A., Frawley, A. D., Fukuda, Y., Gal, C., Gallus, P., Garg, P., Ge, H., Giordano, F., Goto, Y., Grau, N., Greene, S. V., Grosse Perdekamp, M., Gunji, T., Guragain, H., Hachiya, T., Haggerty, J. S., Hahn, K. I., Hamagaki, H., Hamilton, H. F., Han, S. Y., Hanks, J., Hasegawa, S., Haseler, T. O. S., He, X., Hemmick, T. K., Hill, J. C., Hill, K., Hollis, R. S., Homma, K., Hong, B., Hoshino, T., Hotvedt, N., Huang, J., Huang, S., Imai, K., Imrek, J., Inaba, M., Iordanova, A., Isenhower, D., Ito, Y., Ivanishchev, D., Jacak, B. V., Jezghani, M., Ji, Z., Jiang, X., Johnson, B. M., Jorjadze, V., Jouan, D., Jumper, D. S., Kang, J. H., Kapukchyan, D., Karthas, S., Kawall, D., Kazantsev, A. V., Khachatryan, V., Khanzadeev, A., Kim, C., Kim, D. J., Kim, E. -J., Kim, M., Kim, M. H., Kincses, D., Kistenev, E., Klatsky, J., Kline, P., Koblesky, T., Kotov, D., Kudo, S., Kurita, K., Kwon, Y., Lajoie, J. G., Lallow, E. O., Lebedev, A., Lee, S., Leitch, M. J., Leung, Y. H., Lewis, N. A., Li, X., Lim, S. H., Liu, L. D., Liu, M. X., Loggins, V. -R., Lökös, S., Lovasz, K., Lynch, D., Majoros, T., Makdisi, Y. I., Makek, M., Malaev, M., Manko, V. I., Mannel, E., Masuda, H., McCumber, M., McGaughey, P. L., McGlinchey, D., McKinney, C., Mendoza, M., Metzger, W. J., Mignerey, A. C., Mihalik, D. E., Milov, A., Mishra, D. K., Mitchell, J. T., Mitsuka, G., Miyasaka, S., Mizuno, S., Montuenga, P., Moon, T., Morrison, D. P., Morrow, S. I. M., Murakami, T., Murata, J., Nagai, K., Nagashima, K., Nagashima, T., Nagle, J. L., Nagy, M. I., Nakagawa, I., Nakagomi, H., Nakano, K., Nattrass, C., Niida, T., Nouicer, R., Novák, T., Novitzky, N., Novotny, R., Nyanin, A. S., O’Brien, E., Ogilvie, C. A., Orjuela Koop, J. D., Osborn, J. D., Oskarsson, A., Ottino, G. J., Ozawa, K., Pantuev, V., Papavassiliou, V., Park, J. S., Park, S., Pate, S. F., Patel, M., Peng, W., Perepelitsa, D. V., Perera, G. D. N., Peressounko, D. Yu., PerezLara, C. E., Perry, J., Petti, R., Phipps, M., Pinkenburg, C., Pisani, R. P., Pun, A., Purschke, M. L., Radzevich, P. V., Read, K. F., Reynolds, D., Riabov, V., Riabov, Y., Richford, D., Rinn, T., Rolnick, S. D., Rosati, M., Rowan, Z., Runchey, J., Safonov, A. S., Sakaguchi, T., Sako, H., Samsonov, V., Sarsour, M., Sato, K., Sato, S., Schaefer, B., Schmoll, B. K., Sedgwick, K., Seidl, R., Sen, A., Seto, R., Sexton, A., Sharma, D., Shein, I., Shibata, T. -A., Shigaki, K., Shimomura, M., Shioya, T., Shukla, P., Sickles, A., Silva, C. L., Silvermyr, D., Singh, B. K., Singh, C. P., Singh, V., Skoby, M. J., Slunečka, M., Smith, K. L., Snowball, M., Soltz, R. A., Sondheim, W. E., Sorensen, S. P., Sourikova, I. V., Stankus, P. W., Stoll, S. P., Sugitate, T., Sukhanov, A., Sumita, T., Sun, J., Syed, S., Sziklai, J., Takeda, A., Tanida, K., Tannenbaum, M. J., Tarafdar, S., Taranenko, A., Tarnai, G., Tieulent, R., Timilsina, A., Todoroki, T., Tomášek, M., Towell, C. L., Towell, R. S., Tserruya, I., Ueda, Y., Ujvari, B., van Hecke, H. W., Vazquez-Carson, S., Velkovska, J., Virius, M., Vrba, V., Vukman, N., Wang, X. R., Wang, Z., Watanabe, Y., Watanabe, Y. S., Wong, C. P., Woody, C. L., Xu, C., Xu, Q., Xue, L., Yalcin, S., Yamaguchi, Y. L., Yamamoto, H., Yanovich, A., Yin, P., Yoo, J. H., Yoon, I., Yu, H., Yushmanov, I. E., Zajc, W. A., Zelenski, A., Zharko, S., Zou, L., and PHENIX Collaboration. Mon .
"Nuclear Dependence of the Transverse-Single-Spin Asymmetry for Forward Neutron Production in Polarized p + A Collisions at s N N = 200 GeV". United States. https://doi.org/10.1103/PhysRevLett.120.022001.
@article{osti_1416077,
title = {Nuclear Dependence of the Transverse-Single-Spin Asymmetry for Forward Neutron Production in Polarized p + A Collisions at s N N = 200 GeV},
author = {Aidala, C. and Akiba, Y. and Alfred, M. and Andrieux, V. and Aoki, K. and Apadula, N. and Asano, H. and Ayuso, C. and Azmoun, B. and Babintsev, V. and Bagoly, A. and Bandara, N. S. and Barish, K. N. and Bathe, S. and Bazilevsky, A. and Beaumier, M. and Belmont, R. and Berdnikov, A. and Berdnikov, Y. and Blau, D. S. and Boer, M. and Bok, J. S. and Brooks, M. L. and Bryslawskyj, J. and Bumazhnov, V. and Butler, C. and Campbell, S. and Canoa Roman, V. and Cervantes, R. and Chi, C. Y. and Chiu, M. and Choi, I. J. and Choi, J. B. and Citron, Z. and Connors, M. and Cronin, N. and Csanád, M. and Csörgő, T. and Danley, T. W. and Daugherity, M. S. and David, G. and DeBlasio, K. and Dehmelt, K. and Denisov, A. and Deshpande, A. and Desmond, E. J. and Dion, A. and Dixit, D. and Do, J. H. and Drees, A. and Drees, K. A. and Dumancic, M. and Durham, J. M. and Durum, A. and Elder, T. and Enokizono, A. and En’yo, H. and Esumi, S. and Fadem, B. and Fan, W. and Feege, N. and Fields, D. E. and Finger, M. and Finger, M. and Fokin, S. L. and Frantz, J. E. and Franz, A. and Frawley, A. D. and Fukuda, Y. and Gal, C. and Gallus, P. and Garg, P. and Ge, H. and Giordano, F. and Goto, Y. and Grau, N. and Greene, S. V. and Grosse Perdekamp, M. and Gunji, T. and Guragain, H. and Hachiya, T. and Haggerty, J. S. and Hahn, K. I. and Hamagaki, H. and Hamilton, H. F. and Han, S. Y. and Hanks, J. and Hasegawa, S. and Haseler, T. O. S. and He, X. and Hemmick, T. K. and Hill, J. C. and Hill, K. and Hollis, R. S. and Homma, K. and Hong, B. and Hoshino, T. and Hotvedt, N. and Huang, J. and Huang, S. and Imai, K. and Imrek, J. and Inaba, M. and Iordanova, A. and Isenhower, D. and Ito, Y. and Ivanishchev, D. and Jacak, B. V. and Jezghani, M. and Ji, Z. and Jiang, X. and Johnson, B. M. and Jorjadze, V. and Jouan, D. and Jumper, D. S. and Kang, J. H. and Kapukchyan, D. and Karthas, S. and Kawall, D. and Kazantsev, A. V. and Khachatryan, V. and Khanzadeev, A. and Kim, C. and Kim, D. J. and Kim, E. -J. and Kim, M. and Kim, M. H. and Kincses, D. and Kistenev, E. and Klatsky, J. and Kline, P. and Koblesky, T. and Kotov, D. and Kudo, S. and Kurita, K. and Kwon, Y. and Lajoie, J. G. and Lallow, E. O. and Lebedev, A. and Lee, S. and Leitch, M. J. and Leung, Y. H. and Lewis, N. A. and Li, X. and Lim, S. H. and Liu, L. D. and Liu, M. X. and Loggins, V. -R. and Lökös, S. and Lovasz, K. and Lynch, D. and Majoros, T. and Makdisi, Y. I. and Makek, M. and Malaev, M. and Manko, V. I. and Mannel, E. and Masuda, H. and McCumber, M. and McGaughey, P. L. and McGlinchey, D. and McKinney, C. and Mendoza, M. and Metzger, W. J. and Mignerey, A. C. and Mihalik, D. E. and Milov, A. and Mishra, D. K. and Mitchell, J. T. and Mitsuka, G. and Miyasaka, S. and Mizuno, S. and Montuenga, P. and Moon, T. and Morrison, D. P. and Morrow, S. I. M. and Murakami, T. and Murata, J. and Nagai, K. and Nagashima, K. and Nagashima, T. and Nagle, J. L. and Nagy, M. I. and Nakagawa, I. and Nakagomi, H. and Nakano, K. and Nattrass, C. and Niida, T. and Nouicer, R. and Novák, T. and Novitzky, N. and Novotny, R. and Nyanin, A. S. and O’Brien, E. and Ogilvie, C. A. and Orjuela Koop, J. D. and Osborn, J. D. and Oskarsson, A. and Ottino, G. J. and Ozawa, K. and Pantuev, V. and Papavassiliou, V. and Park, J. S. and Park, S. and Pate, S. F. and Patel, M. and Peng, W. and Perepelitsa, D. V. and Perera, G. D. N. and Peressounko, D. Yu. and PerezLara, C. E. and Perry, J. and Petti, R. and Phipps, M. and Pinkenburg, C. and Pisani, R. P. and Pun, A. and Purschke, M. L. and Radzevich, P. V. and Read, K. F. and Reynolds, D. and Riabov, V. and Riabov, Y. and Richford, D. and Rinn, T. and Rolnick, S. D. and Rosati, M. and Rowan, Z. and Runchey, J. and Safonov, A. S. and Sakaguchi, T. and Sako, H. and Samsonov, V. and Sarsour, M. and Sato, K. and Sato, S. and Schaefer, B. and Schmoll, B. 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abstractNote = {We report that during 2015 the Relativistic Heavy Ion Collider (RHIC) provided collisions of transversely polarized protons with Au and Al nuclei for the first time, enabling the exploration of transverse-single-spin asymmetries with heavy nuclei. Large single-spin asymmetries in very forward neutron production have been previously observed in transversely polarized p+p collisions at RHIC, and the existing theoretical framework that was successful in describing the single-spin asymmetry in p+p collisions predicts only a moderate atomic-mass-number (A) dependence. In contrast, the asymmetries observed at RHIC in p+A collisions showed a surprisingly strong A dependence in inclusive forward neutron production. The observed asymmetry in p+Al collisions is much smaller, while the asymmetry in p+Au collisions is a factor of three larger in absolute value and of opposite sign. Lastly, the interplay of different neutron production mechanisms is discussed as a possible explanation of the observed A dependence.},
doi = {10.1103/PhysRevLett.120.022001},
journal = {Physical Review Letters},
number = 2,
volume = 120,
place = {United States},
year = {Mon Jan 08 00:00:00 EST 2018},
month = {Mon Jan 08 00:00:00 EST 2018}
}
https://doi.org/10.1103/PhysRevLett.120.022001
Web of Science
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