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Longitudinal Double-Spin Asymmetries for Dijet Production at Intermediate Pseudorapidity in Polarized $pp$ Collisions at $\sqrt{s}$ = 200 GeV

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arxiv 1805.09742 v3 pith:YSMKPK3C submitted 2018-05-24 hep-ex nucl-ex

J. Adam , L. Adamczyk , J. R. Adams , J. K. Adkins , G. Agakishiev , M. M. Aggarwal , Z. Ahammed , N. N. Ajitanand
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I. Alekseev D. M. Anderson R. Aoyama A. Aparin D. Arkhipkin E. C. Aschenauer M. U. Ashraf F. Atetalla A. Attri G. S. Averichev X. Bai V. Bairathi K. Barish A. J. Bassill A. Behera R. Bellwied A. Bhasin A. K. Bhati J. Bielcik J. Bielcikova L. C. Bland I. G. Bordyuzhin J. D. Brandenburg A. V. Brandin D. Brown J. Bryslawskyj I. Bunzarov J. Butterworth H. Caines M. Calderón de la Barca Sánchez J. M. Campbell D. Cebra I. Chakaberia P. Chaloupka F-H. Chang Z. Chang N. Chankova-Bunzarova A. Chatterjee S. Chattopadhyay J. H. Chen X. Chen J. Cheng M. Cherney W. Christie G. Contin H. J. Crawford S. Das T. G. Dedovich I. M. Deppner A. A. Derevschikov L. Didenko C. Dilks X. Dong J. L. Drachenberg J. C. Dunlop L. G. Efimov N. Elsey J. Engelage G. Eppley R. Esha S. Esumi O. Evdokimov J. Ewigleben O. Eyser R. Fatemi S. Fazio P. Federic P. Federicova J. Fedorisin P. Filip E. Finch Y. Fisyak C. E. Flores L. Fulek C. A. Gagliardi T. Galatyuk F. Geurts A. Gibson D. Grosnick D. S. Gunarathne Y. Guo A. Gupta W. Guryn A. I. Hamad A. Hamed A. Harlenderova J. W. Harris L. He S. Heppelmann N. Herrmann A. Hirsch L. Holub S. Horvat X. Huang B. Huang S. L. Huang H. Z. Huang T. Huang T. J. Humanic P. Huo G. Igo W. W. Jacobs A. Jentsch J. Jia K. Jiang S. Jowzaee E. G. Judd S. Kabana D. Kalinkin K. Kang D. Kapukchyan K. Kauder H. W. Ke D. Keane A. Kechechyan D. P. Kiko{l}a C. Kim T. A. Kinghorn I. Kisel A. Kisiel L. Kochenda L. K. Kosarzewski A. F. Kraishan L. Kramarik L. Krauth P. Kravtsov K. Krueger N. Kulathunga S. Kumar L. Kumar J. Kvapil J. H. Kwasizur R. Lacey J. M. Landgraf J. Lauret A. Lebedev R. Lednicky J. H. Lee X. Li C. Li W. Li Y. Li Y. Liang J. Lidrych T. Lin A. Lipiec M. A. Lisa F. Liu P. Liu H. Liu Y. Liu T. Ljubicic W. J. Llope M. Lomnitz R. S. Longacre X. Luo S. Luo G. L. Ma Y. G. Ma L. Ma R. Ma N. Magdy R. Majka D. Mallick S. Margetis C. Markert H. S. Matis O. Matonoha D. Mayes J. A. Mazer K. Meehan J. C. Mei N. G. Minaev S. Mioduszewski D. Mishra B. Mohanty M. M. Mondal I. Mooney D. A. Morozov Md. Nasim J. D. Negrete J. M. Nelson D. B. Nemes M. Nie G. Nigmatkulov T. Niida L. V. Nogach T. Nonaka S. B. Nurushev G. Odyniec A. Ogawa K. Oh S. Oh V. A. Okorokov D. Olvitt Jr. B. S. Page R. Pak Y. Panebratsev B. Pawlik H. Pei C. Perkins J. Pluta J. Porter M. Posik N. K. Pruthi M. Przybycien J. Putschke A. Quintero S. K. Radhakrishnan S. Ramachandran R. L. Ray R. Reed H. G. Ritter J. B. Roberts O. V. Rogachevskiy J. L. Romero L. Ruan J. Rusnak O. Rusnakova N. R. Sahoo P. K. Sahu S. Salur J. Sandweiss J. Schambach A. M. Schmah W. B. Schmidke N. Schmitz B. R. Schweid F. Seck J. Seger M. Sergeeva R. Seto P. Seyboth N. Shah E. Shahaliev P. V. Shanmuganathan M. Shao W. Q. Shen F. Shen S. S. Shi Q. Y. Shou E. P. Sichtermann S. Siejka R. Sikora M. Simko S. Singha N. Smirnov D. Smirnov W. Solyst P. Sorensen H. M. Spinka B. Srivastava T. D. S. Stanislaus D. J. Stewart M. Strikhanov B. Stringfellow A. A. P. Suaide T. Sugiura M. Sumbera B. Summa Y. Sun X. Sun X. M. Sun B. Surrow D. N. Svirida P. Szymanski Z. Tang A. H. Tang A. Taranenko T. Tarnowsky J. H. Thomas A. R. Timmins D. Tlusty T. Todoroki M. Tokarev C. A. Tomkiel S. Trentalange R. E. Tribble P. Tribedy S. K. Tripathy O. D. Tsai B. Tu T. Ullrich D. G. Underwood I. Upsal G. Van Buren J. Vanek A. N. Vasiliev I. Vassiliev F. Videb{ae}k S. Vokal S. A. Voloshin A. Vossen G. Wang Y. Wang F. Wang J. C. Webb L. Wen G. D. Westfall H. Wieman S. W. Wissink R. Witt Y. Wu Z. G. Xiao G. Xie W. Xie Q. H. Xu Z. Xu J. Xu Y. F. Xu N. Xu S. Yang C. Yang Q. Yang Y. Yang Z. Ye L. Yi K. Yip I. -K. Yoo N. Yu H. Zbroszczyk W. Zha Z. Zhang L. Zhang Y. Zhang X. P. Zhang J. Zhang S. Zhang J. Zhao C. Zhong C. Zhou L. Zhou Z. Zhu X. Zhu M. Zyzak (STAR Collaboration)
This is my paper · ORCID
classification hep-exnucl-ex
keywords analysesasymmetriescollisionsdijetsdouble-spingloballongitudinalmeasured
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We present the first measurements of the longitudinal double-spin asymmetry $A_{LL}$ for dijets with at least one jet reconstructed within the pseudorapidity range $0.8 < \eta < 1.8$. The dijets were measured in polarized $pp$ collisions at a center-of-mass energy $\sqrt{s}$ = 200 GeV. Values for $A_{LL}$ are determined for several distinct event topologies, defined by the jet pseudorapidities, and span a range of parton momentum fraction $x$ down to $x \sim$ 0.01. The measured asymmetries are found to be consistent with the predictions of global analyses that incorporate the results of previous RHIC measurements. They will provide new constraints on $\Delta g(x)$ in this poorly constrained region when included in future global analyses.

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Cited by 2 Pith papers

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