Measurement of charged pion double spin asymmetries at midrapidity in longitudinally polarized p+p collisions at s=510 GeV

6533b85efe1ef96bd12c0655

RESEARCH PRODUCT

Measurement of charged pion double spin asymmetries at midrapidity in longitudinally polarized p+p collisions at s=510 GeV

Alice Mignerey S. Miyasaka Roli Esha Shoichi Hasegawa Pawan Kumar Netrakanti Anne Marie Sickles X. Sun B. Meredith Takao Sakaguchi Y. Imazu Shota Suzuki Alexei Khanzadeev J. S. Bok A. Sen N. Feege S. Ishimaru D. Lynch A. D. Frawley S. Huang E. Kistenev H. A. Torii B. Kurgyis Toru Sugitate J. Sun Mate Csanad Sándor Lökös K. N. Barish N. N. Ajitanand T. O. S. Haseler M. Kurosawa S. Zharko J. H. Yoo M. Slunečka P. L. Mcgaughey G. D. N. Perera K. B. Lee X. He M. Potekhin Y. Aramaki M. L. Brooks J. Koster E. Joo A. Mwai Maya Hachiya Shimomura Vardan Khachatryan J. Bryslawskyj S. Nelson B. Azmoun M. Nihashi Hideki Hamagaki W. Fan M. Vargyas R. A. Soltz G. David T. Todoroki K. I. Hahn H. Nakagomi T. Hoshino Y. I. Makdisi M. Rosati C. L. Silva D. H. Kim T. V. Moukhanova Hari Guragain S. Beckman E. Mannel I. Tserruya A. Deshpande A. Sexton W. J. Metzger R. Seto M. Jezghani S. Bathe T. W. Danley V. S. Pantuev K. Kihara Tamás Csörgő Qiao Xu B. Mulilo A. Durum S. Tarafdar L. Ding E. J. Desmond B. Fadem I. J. Choi B. Xia M. Kofarago D. Roach Viktor Riabov J. M. Durham V. Singh A. Hodges Yoshifumi Ueda J. H. Do R. P. Pisani P. Kline M. Towell D. Silvermyr Susumu Sato A. Dion A. Pun H. Asano Jan Rak Jan Rak L. Zou R. Lacey M. J. Tannenbaum Ajeeta Khatiwada T. Koblesky D. Kawall U. Acharya Kensuke Homma A. Meles Yongsun Kim W. Peng V. Bumazhnov T. Murakami A. Yanovich Timothy Thomas Rinn H. J. Kim K. Tanida M. I. Nagy Kimberly Hill M. Sarsour Z. Rowan P. W. Stankus J. Hanks M. Mendoza Xingguo Li S. P. Whitaker C. L. Woody D. Watanabe D. Black B. K. Schmoll E. Vznuzdaev R. Nishitani C. P. Singh Jiangyong Jia Zvi Hirsh Citron A. Berdnikov Martin Purschke C. A. Aidala D. E. Fields Y. Goto M. Patel N. Ramasubramanian Minghui Liu B. M. Johnson H. Ge K. Nakano Y. H. Leung H. Sako I. Shein W. E. Sondheim A. Glenn P. V. Radzevich S. P. Sorensen I. E. Yushmanov Eunja Kim H. En'yo K. Sedgwick M. Mccumber Mihael Makek K. Boyle M. J. Leitch D. Kleinjan N. Riveli Min-hye Kim P. Montuenga X. Jiang C. Y. Scarlett M. Beaumier J. Sziklai Kenneth Francis Read E. A. Gamez K. S. Joo J. G. Lajoie I. Younus Alexander Milov I. Nakagawa Serpil Yalcin R. S. Towell D. K. Mishra J. G. Rubin M. Alfred T. Hachiya Y. Watanabe N. Apadula Barbara Jacak N. Novitzky Jennifer E. Perry Iu. Mitrankov F. Wei K. L. Smith C. P. Wong R. Petti N. S. Bandara Y. J. Kwon Y. Gu A. J. Miller A. Iordanova J. Murata N. Grau Vladimir Samsonov D. P. Morrison Petr Gallus S. Campbell S. Esumi D. Sharma W. A. Zajc L. Xue A. Sukhanov K. Kurita Christine Nattrass J. T. Mitchell M. Leitgab Shuo Han A. Denisov Yuki Watanabe Agneta Oskarsson S. I. Morrow Tatsuya Chujo K. Dehmelt Animesh Datta T. Sumita A. Taranenko C. O. Kim R. Pak C. Y. Chi Motoi Inaba J. C. Hill E. T. Atomssa Sergey Fokin Jen-chieh Peng A. V. Kazantsev J. S. Kang S. J. Jeon Yanjun Wu Balazs Ujvari C. Gal Y. Zhai D. Reynolds Julia Velkovska R. Seidl D. Kincses Vladislav Manko J. L. Nagle Xiong Wang S. Sawada A. Franz J. Runchey T. Majoros M. S. Daugherity Dong Jo Kim K. Imai Y. Berdnikov I. V. Sourikova Ferdinando Giordano S. H. Lee Y. Akiba C. Mckinney M. Tomášek Brennan Schaefer S. Nagamiya L. Patel A. Timilsina T. C. Awes Kyoichiro Ozawa Byung-sik Hong A. Bazilevsky Vaclav Vrba J. Huang H. W. Yu J. Seele Prakhar Garg M. Wysocki B. Bannier N. A. Lewis Norio Saito R. S. Towell Prashant Shukla S. H. Lim S. F. Pate Henner Buesching V. Babintsev J. A. Key D. Ivanishchev Y. Riabov V. Papavassiliou C. E. Perezlara Kenta Shigaki A. S. Nyanin C. A. Ogilvie Rachid Nouicer T. K. Hemmick Bhawani Singh A. N. Zelenski Y. L. Yamaguchi Yasuo Miake S. Mizuno K. Deblasio R. Pinson Don Mcglinchey S. Wolin A. Drees D. Kotov S. P. Stoll D. Jouan Atsushi Takahara K. A. Drees J. Klatsky J. B. Choi R. S. Hollis G. Mitsuka A. Adare A. Adare J. E. Frantz A. Enokizono A. Taketani Priyanka Sett D. S. Jumper Z. Sun T. Niida M. Chiu T. A. Shibata A. Lebedev I. Ravinovich D. Isenhower Tamas Novak T. Moon R. Belmont Senta Greene M. Bai E. O'brien H. Van Hecke M. Grosse Perdekamp Y. Ikeda M. E. Connors S. K. Park Taku Gunji R. Akimoto Z. Ji D. Yu Peressounko Dennis Perepelitsa C. Pinkenburg J. D. Osborn Inseok Yoon Zirui Wang M. Finger M. Stepanov J. H. Kang J. S. Haggerty M. Virius J. D. Orjuela Koop C. H. Chen A. Manion S. D. Rolnick Dillon Scott Fitzgerald Kei Nagashima V. Canoa Roman Raphael Noel Tieulent D. Richford

subject

Quantum chromodynamics Physics 010308 nuclear & particles physics Scattering High Energy Physics::Lattice High Energy Physics::Phenomenology Nuclear Theory Parton Deep inelastic scattering 7. Clean energy 01 natural sciences Gluon Nuclear physics Pion 0103 physical sciences Proton spin crisis High Energy Physics::Experiment Nuclear Experiment 010306 general physics Relativistic Heavy Ion Collider

description

The PHENIX experiment at the Relativistic Heavy Ion Collider has measured the longitudinal double spin asymmetries, $A_{LL}$, for charged pions at midrapidity ($|\eta|<0.35$) in longitudinally polarized $p+p$ collisions at $\sqrt{s}=510$ GeV. These measurements are sensitive to the gluon spin contribution to the total spin of the proton in the parton momentum fraction $x$ range between 0.04 and 0.09. One can infer the sign of the gluon polarization from the ordering of pion asymmetries with charge alone. The asymmetries are found to be consistent with global quantum-chromodynamics fits of deep-inelastic scattering and data at $\sqrt{s}=200$ GeV, which show a nonzero positive contribution of gluon spin to the proton spin.

year	journal	country	edition	language
2020-08-05	Physical Review D

https://doi.org/10.1103/physrevd.102.032001