Inclusive cross section and double-helicity asymmetry forπ0production at midrapidity inp+pcollisions ats=510 GeV

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RESEARCH PRODUCT

Inclusive cross section and double-helicity asymmetry forπ0production at midrapidity inp+pcollisions ats=510 GeV

Y. Ikeda C. Pinkenburg V. Bumazhnov Anne Marie Sickles K. Gainey D. Black Hideyuki Oide M. Stepanov C. Baumann J. S. Bok C. A. Ogilvie T. K. Hemmick Bhawani Singh B. J. Ramson P. Steinberg Takahiro Fusayasu Henner Buesching Yasuo Miake C. P. Singh B. M. Johnson Filip Krizek Filip Krizek Y. Imazu Serpil Yalcin K. Kihara K. Deblasio Barbara Jacak J. Sziklai R. Pinson M. Virius Y. Nakamiya D. Lynch S. Solano Don Mcglinchey Brian Cole R. A. Soltz W. A. Zajc L. Xue J. H. Kang J. S. Haggerty H. Nakagomi T. Hoshino J. D. Orjuela Koop V. Baublis A. Yanovich Z. Rowan M. Mendoza S. Wolin Min-hye Kim Shoichi Hasegawa A. Shaver S. Choi J. T. Mitchell X. Gong A. Denisov Yuki Watanabe V. Cianciolo Sergey Fokin C. L. Silva D. H. Kim D. H. Kim S. Bathe N. Hotvedt R. Seidl C. H. Chen Vladislav Manko Kensuke Homma E. Richardson M. S. Ryu A. Timilsina J. Seele Y. Fukao A. Manion M. Kurosawa J. H. Yoo J. M. Durham E. Kistenev H. Ge K. Nakano T. O. S. Haseler J. H. Do C. L. Towell Susumu Sato Kei Nagashima G. W. Kim W. E. Sondheim J. E. Frantz A. Drees Y. J. Kwon R. Akimoto R. Akimoto Senta Greene Jongmin Lee Anders Nils Erik Oskarsson M. Tomášek M. Rosati B. Lewis Raphael Noel Tieulent Y. Gu K. Boyle A. Meles A. Ster H. Qu P. B. Diss Martin Purschke C. A. Aidala C. A. Aidala N. S. Bandara N. Feege Vladimir Samsonov Y. S. Lai Christine Nattrass T. Hester M. R. Stone A. Enokizono E. O'brien B. Meredith J. S. Kang M. Chiu Ajit Kumar Mohanty Hideki Hamagaki K. Aoki M. Vargyas D. Kawall T. A. Shibata P. K. Khandai R. Kitamura K. Tanida D. Kotov G. David T. Todoroki Atsushi Takahara K. I. Hahn D. E. Fields Byung-sik Hong A. Bazilevsky A. Taketani Priyanka Sett H. A. Torii T. Sugitate45 Y. Akiba Y. Akiba Y. Akiba Shunji Nishimura Alexander Milov M. Mccumber J. Alexander Zvi Hirsh Citron V. S. Pantuev M. Grosse Perdekamp R. S. Towell K. Imai T. Niida H. W. Yu Y. Berdnikov S. H. Lee C. Mckinney Brennan Schaefer S. Nagamiya D. M. Lee G. H. Lee François Fleuret Timothy Thomas Rinn H. J. Kim R. S. Towell Prashant Shukla Tomofumi Nagae J. L. Nagle D. S. Jumper N. Riveli K. O. Eyser D. Isenhower Tamas Novak T. Moon I. Garishvili F. Wei X. Bai S. K. Park P. Montuenga A. Lebedev K. A. Drees Jason Kamin S. P. Stoll Jan Rak Jan Rak A. Iordanova J. Murata I. Shein D. Kotchetkov M. Moskowitz I. Nakagawa Young-ki Kim T. Engelmore S. R. P. Mohapatra K. Okada Evert Anders Stenlund I. Ravinovich I. Younus B. Sahlmueller M. Patel H. En'yo David Olle Rickard Silvermyr R. Lacey Vaclav Vrba J. Klatsky R. Granier De Cassagnac A. Adare O. Drapier Sung Keun Park Jong-min Park Taku Gunji X. Jiang M. J. Leitch S. F. Pate Ke. Nakamura K. Sedgwick M. Bai N. Cronin Alexei Khanzadeev R. Belmont Animesh Datta T. Sumita Charles Maguire S. Yokkaichi Peter Christiansen Viktor Riabov N. N. Ajitanand N. N. Ajitanand Mihael Makek M. Beaumier D. Yu Peressounko K. S. Joo C. Y. Chi D. K. Mishra Dennis Perepelitsa D. P. Morrison J. B. Choi G. D. N. Perera S. Butsyk A. Taranenko Takahiro Nakamura J. A. Key S. Huang J. G. Rubin A. Isinhue C. L. Woody A. Berdnikov Y. Tanaka E. Mannel M. S. Daugherity S. J. Jeon S. Zhou Toshiki Maruyama N. Apadula Y. L. Yamaguchi Ferdinando Giordano R. S. Hollis S. Campbell B. H. Kang Y. Watanabe S. D. Rolnick S. P. Whitaker B. Komkov R. Petti A. Durum D. Jouan S. Mizuno N. Grau S. Esumi D. Sharma K. Watanabe E. Joo Norio Saito Tsutomu Mibe J. D. Osborn Inseok Yoon D. Ivanishchev Hari Guragain K. Shoji S. H. Lim Petr Gallus V. Papavassiliou S. Kanda Yongsun Kim S. Tarafdar P. W. Stankus B. Azmoun M. Leitgab Shuo Han J. S. Kapustinsky T. V. Moukhanova N. Novitzky N. Novitzky N. Novitzky V. Babintsev Dmitry Blau A. Garishvili B. Kimelman H. Asano I. V. Sourikova E. J. Desmond Zhiying You Jiangyong Jia J. Hanks Y. Goto E. Vazquez-zambrano P. Kline K. S. Lee A. Dion Ryugo S. Hayano Y. Riabov J. Huang Tatsuya Chujo Kenta Shigaki I. Tserruya I. E. Yushmanov Prakhar Garg M. Wysocki A. S. Nyanin M. Finger B. Bannier Rachid Nouicer A. N. Zelenski T. Murakami Motoi Inaba J. C. Hill M. Jezghani M. Skolnik Mate Csanad S. Sawada A. Franz V. Singh T. Koblesky M. Nihashi D. Kleinjan M. Sarsour N. Crossette R. P. Pisani A. Glenn Eunja Kim K. Dehmelt Jen-chieh Peng D. Reynolds Inkyu Park Xiong Wang Dong Jo Kim Dong Jo Kim A. Veicht E. T. Atomssa C. Gal Julia Velkovska M. Gonin T Csoergo A. J. Miller A. Sukhanov K. Kurita Matthew Snowball C. O. Kim R. Pak K. B. Lee L. Ding M. Kofarago D. Roach K. M. Kijima K. Hashimoto Xingguo Li S. P. Sorensen H. Ozaki J. G. Lajoie M. Alfred T. Hachiya S. Lee Jennifer E. Perry Maya Hachiya Shimomura Vardan Khachatryan Y. I. Makdisi X. He Y. Aramaki M. J. Tannenbaum B. K. Schmoll Robert Vertesi E. Tennant J. Koster Alice Mignerey L. D'orazio S. Miyasaka Pawan Kumar Netrakanti Aaron White Takao Sakaguchi A. Sen A. Mwai A. D. Frawley J. Sun H. F. Hamilton H. Sako M. Slunečka A. Sexton P. L. Mcgaughey R. Seto T. W. Danley B. Fadem S. Beckman K. N. Barish M. L. Brooks L. Zou S. Baumgart J. Bryslawskyj Minghui Liu A. Deshpande Kenneth Francis Read T. Ichihara I. J. Choi B. Xia A. V. Kazantsev M. Towell M. I. Nagy L. Patel Y. Sekiguchi D. Watanabe T. C. Awes Kyoichiro Ozawa E. Vznuzdaev H. Van Hecke

subject

Physics Particle physics 010308 nuclear & particles physics media_common.quotation_subject Particle accelerator Deep inelastic scattering Polarization (waves)01 natural sciences Helicity Asymmetry law.invention Gluon Nuclear physics law 0103 physical sciences Pi High Energy Physics::Experiment Nuclear Experiment 010306 general physics Relativistic Heavy Ion Collider media_common

description

PHENIX measurements are presented for the cross section and double-helicity asymmetry (A(LL)) in inclusive pi(0) production at midrapidity from p + p collisions at root s = 510 GeV from data taken in 2012 and 2013 at the Relativistic Heavy Ion Collider. The next-to-leading-order perturbative-quantum-chromodynamics theory calculation is in excellent agreement with the presented cross section results. The calculation utilized parton-to-pion fragmentation functions from the recent DSS14 global analysis, which prefer a smaller gluon-to-pion fragmentation function. The pi(0)A(LL) results follow an increasingly positive asymmetry trend with p(T) and root s with respect to the predictions and are in excellent agreement with the latest global analysis results. This analysis incorporated earlier results on pi(0) and jet A(LL) and suggested a positive contribution of gluon polarization to the spin of the proton Delta G for the gluon momentum fraction range x > 0.05. The data presented here extend to a currently unexplored region, down to x similar to 0.01, and thus provide additional constraints on the value of Delta G.

year	journal	country	edition	language
2016-01-07	Physical Review D

https://doi.org/10.1103/physrevd.93.011501