Related papers: Gluon polarization and jet production at STAR

Future prospects of di-jet production constraining $\Delta g(x)$ at low $\mathbf{x}$ at STAR at RHIC

One of the main objectives of the high-energy spin physics program at RHIC at BNL is the precise determination of the polarized gluon distribution function, $\Delta g(x)$. Polarized $\vec{p}+\vec{p}$ collisions at $\sqrt{s}=200\,$GeV and at…

High Energy Physics - Experiment · Physics 2014-07-17 Bernd Surrow

Measurement of the double longitudinal spin asymmetry in inclusive jet production in polarized p+p collisions at sqrt(s) = 200 GeV

We present preliminary results for the first measurements of the double longitudinal spin asymmetry A_LL in inclusive jet production at mid-rapidity in polarized proton-proton collisions at sqrt(s) = 200 GeV. The data amount to ~ 0.5 pb-1…

High Energy Physics - Experiment · Physics 2019-08-14 Joanna Kiryluk

Longitudinal and transverse spin asymmetries for inclusive jet production at mid-rapidity in polarized p+p collisions at sqrt{s}=200 GeV

We report STAR measurements of the longitudinal double-spin asymmetry A_LL, the transverse single-spin asymmetry A_N, and the transverse double-spin asymmetries A_Sigma and A_TT for inclusive jet production at mid-rapidity in polarized p+p…

Nuclear Experiment · Physics 2012-08-27 The STAR Collaboration , L. Adamczyk , G. Agakishiev , M. M. Aggarwal , Z. Ahammed , A. V. Alakhverdyants , I. Alekseev , J. Alford , B. D. Anderson , C. D. Anson , D. Arkhipkin , E. Aschenauer , G. S. Averichev , J. Balewski , A. Banerjee , Z. Barnovska , D. R. Beavis , R. Bellwied , M. J. Betancourt , R. R. Betts , A. Bhasin , A. K. Bhati , H. Bichsel , J. Bielcik , J. Bielcikova , L. C. Bland , I. G. Bordyuzhin , W. Borowski , J. Bouchet , A. V. Brandin , A. Bridgeman , S. G. Brovko , E. Bruna , S. Bueltmann , I. Bunzarov , T. P. Burton , J. Butterworth , X. Z. Cai , H. Caines , M. Calderón de la Barca Sánchez , D. Cebra , R. Cendejas , M. C. Cervantes , P. Chaloupka , S. Chattopadhyay , H. F. Chen , J. H. Chen , J. Y. Chen , L. Chen , J. Cheng , M. Cherney , A. Chikanian , W. Christie , P. Chung , J. Chwastowski , M. J. M. Codrington , R. Corliss , J. G. Cramer , H. J. Crawford , X. Cui , A. Davila Leyva , L. C. De Silva , R. R. Debbe , T. G. Dedovich , J. Deng , R. Derradi de Souza , S. Dhamija , L. Didenko , F. Ding , A. Dion , P. Djawotho , X. Dong , J. L. Drachenberg , J. E. Draper , C. M. Du , L. E. Dunkelberger , J. C. Dunlop , L. G. Efimov , M. Elnimr , J. Engelage , G. Eppley , L. Eun , O. Evdokimov , R. Fatemi , S. Fazio , J. Fedorisin , R. G. Fersch , P. Filip , E. Finch , Y. Fisyak , C. A. Gagliardi , D. R. Gangadharan , F. Geurts , S. Gliske , Y. N. Gorbunov , O. G. Grebenyuk , D. Grosnick , S. Gupta , W. Guryn , B. Haag , O. Hajkova , A. Hamed , L-X. Han , J. W. Harris , J. P. Hays-Wehle , S. Heppelmann , A. Hirsch , G. W. Hoffmann , D. J. Hofman , S. Horvat , B. Huang , H. Z. Huang , P. Huck , T. J. Humanic , L. Huo , G. Igo , W. W. Jacobs , C. Jena , J. Joseph , E. G. Judd , S. Kabana , K. Kang , J. Kapitan , K. Kauder , H. W. Ke , D. Keane , A. Kechechyan , A. Kesich , D. Kettler , D. P. Kikola , J. Kiryluk , A. Kisiel , V. Kizka , S. R. Klein , D. D. Koetke , T. Kollegger , J. Konzer , I. Koralt , L. Koroleva , W. Korsch , L. Kotchenda , K. Kowalik , P. Kravtsov , K. Krueger , L. Kumar , M. A. C. Lamont , J. M. Landgraf , S. LaPointe , J. Lauret , A. Lebedev , R. Lednicky , J. H. Lee , W. Leight , M. J. LeVine , C. Li , L. Li , W. Li , X. Li , X. Li , Y. Li , Z. M. Li , L. M. Lima , M. A. Lisa , F. Liu , T. Ljubicic , W. J. Llope , R. S. Longacre , Y. Lu , X. Luo , A. Luszczak , G. L. Ma , Y. G. Ma , D. M. M. D. Madagodagettige Don , D. P. Mahapatra , R. Majka , O. I. Mall , S. Margetis , C. Markert , H. Masui , H. S. Matis , D. McDonald , T. S. McShane , J. Millane , S. Mioduszewski , M. K. Mitrovski , Y. Mohammed , B. Mohanty , M. M. Mondal , B. Morozov , M. G. Munhoz , M. K. Mustafa , M. Naglis , B. K. Nandi , Md. Nasim , T. K. Nayak , L. V. Nogach , J. Novak , G. Odyniec , A. Ogawa , K. Oh , A. Ohlson , V. Okorokov , E. W. Oldag , R. A. N. Oliveira , D. Olson , P. Ostrowski , M. Pachr , B. S. Page , S. K. Pal , Y. X. Pan , Y. Pandit , Y. Panebratsev , T. Pawlak , B. Pawlik , H. Pei , C. Perkins , W. Peryt , P. Pile , M. Planinic , J. Pluta , D. Plyku , N. Poljak , J. Porter , A. M. Poskanzer , C. B. Powell , D. Prindle , C. Pruneau , N. K. Pruthi , M. Przybycien , P. R. Pujahari , J. Putschke , H. Qiu , R. Raniwala , S. Raniwala , R. L. Ray , R. Redwine , R. Reed , C. K. Riley , H. G. Ritter , J. B. Roberts , O. V. Rogachevskiy , J. L. Romero , J. F. Ross , L. Ruan , J. Rusnak , N. R. Sahoo , I. Sakrejda , T. Sakuma , S. Salur , A. Sandacz , J. Sandweiss , E. Sangaline , A. Sarkar , M. Sarsour , J. Schambach , R. P. Scharenberg , A. M. Schmah , B. Schmidke , N. Schmitz , T. R. Schuster , J. Seele , J. Seger , P. Seyboth , N. Shah , E. Shahaliev , M. Shao , B. Sharma , M. Sharma , S. S. Shi , Q. Y. Shou , E. P. Sichtermann , R. N. Singaraju , M. J. Skoby , D. Smirnov , N. Smirnov , D. Solanki , P. Sorensen , U. G. deSouza , H. M. Spinka , B. Srivastava , T. D. S. Stanislaus , D. Staszak , S. G. Steadman , J. R. Stevens , R. Stock , M. Strikhanov , B. Stringfellow , A. A. P. Suaide , M. C. Suarez , M. Sumbera , X. M. Sun , Y. Sun , Z. Sun , B. Surrow , D. N. Svirida , T. J. M. Symons , A. Szanto de Toledo , J. Takahashi , A. H. Tang , Z. Tang , L. H. Tarini , T. Tarnowsky , D. Thein , J. H. Thomas , J. Tian , A. R. Timmins , D. Tlusty , M. Tokarev , T. A. Trainor , S. Trentalange , R. E. Tribble , P. Tribedy , B. A. Trzeciak , O. D. Tsai , J. Turnau , T. Ullrich , D. G. Underwood , G. Van Buren , G. van Nieuwenhuizen , J. A. Vanfossen, , R. Varma , G. M. S. Vasconcelos , F. Videbæk , Y. P. Viyogi , S. Vokal , S. A. Voloshin , A. Vossen , M. Wada , F. Wang , G. Wang , H. Wang , J. S. Wang , Q. Wang , X. L. Wang , Y. Wang , G. Webb , J. C. Webb , G. D. Westfall , C. Whitten , H. Wieman , S. W. Wissink , R. Witt , W. Witzke , Y. F. Wu , Z. Xiao , W. Xie , K. Xin , H. Xu , N. Xu , Q. H. Xu , W. Xu , Y. Xu , Z. Xu , L. Xue , Y. Yang , Y. Yang , P. Yepes , Y. Yi , K. Yip , I-K. Yoo , M. Zawisza , H. Zbroszczyk , J. B. Zhang , S. Zhang , W. M. Zhang , X. P. Zhang , Y. Zhang , Z. P. Zhang , F. Zhao , J. Zhao , C. Zhong , X. Zhu , Y. H. Zhu , Y. Zoulkarneeva

Precision Measurement of the Longitudinal Double-spin Asymmetry for Inclusive Jet Production in Polarized Proton Collisions at $\sqrt{s}=200$ GeV

We report a new high-precision measurement of the mid-rapidity inclusive jet longitudinal double-spin asymmetry, $A_{LL}$, in polarized $pp$ collisions at center-of-mass energy $\sqrt{s}=200$ GeV. The STAR data place stringent constraints…

High Energy Physics - Experiment · Physics 2015-09-02 STAR Collaboration , L. Adamczyk , J. K. Adkins , G. Agakishiev , M. M. Aggarwal , Z. Ahammed , I. Alekseev , J. Alford , C. D. Anson , A. Aparin , D. Arkhipkin , E. C. Aschenauer , G. S. Averichev , A. Banerjee , D. R. Beavis , R. Bellwied , A. Bhasin , A. K. Bhati , P. Bhattarai , H. Bichsel , J. Bielcik , J. Bielcikova , L. C. Bland , I. G. Bordyuzhin , W. Borowski , J. Bouchet , A. V. Brandin , S. G. Brovko , S. Bultmann , I. Bunzarov , T. P. Burton , J. Butterworth , H. Caines , M. Calderon de la Barca Sanchez , J. M. Campbell , D. Cebra , R. Cendejas , M. C. Cervantes , P. Chaloupka , Z. Chang , S. Chattopadhyay , H. F. Chen , J. H. Chen , L. Chen , J. Cheng , M. Cherney , A. Chikanian , W. Christie , J. Chwastowski , M. J. M. Codrington , G. Contin , J. G. Cramer , H. J. Crawford , A. B. Cudd , X. Cui , S. Das , A. Davila Leyva , L. C. De Silva , R. R. Debbe , T. G. Dedovich , J. Deng , A. A. Derevschikov , R. Derradi de Souza , S. Dhamija , B. di Ruzza , L. Didenko , C. Dilks , F. Ding , P. Djawotho , X. Dong , J. L. Drachenberg , J. E. Draper , C. M. Du , L. E. Dunkelberger , J. C. Dunlop , L. G. Efimov , J. Engelage , K. S. Engle , G. Eppley , L. Eun , O. Evdokimov , O. Eyser , R. Fatemi , S. Fazio , J. Fedorisin , P. Filip , E. Finch , Y. Fisyak , C. E. Flores , C. A. Gagliardi , D. R. Gangadharan , D. Garand , F. Geurts , A. Gibson , M. Girard , S. Gliske , L. Greiner , D. Grosnick , D. S. Gunarathne , Y. Guo , A. Gupta , S. Gupta , W. Guryn , B. Haag , A. Hamed , L. -X. Han , R. Haque , J. W. Harris , S. Heppelmann , A. Hirsch , G. W. Hoffmann , D. J. Hofman , S. Horvat , B. Huang , H. Z. Huang , X. Huang , P. Huck , T. J. Humanic , G. Igo , W. W. Jacobs , H. Jang , E. G. Judd , S. Kabana , D. Kalinkin , K. Kang , K. Kauder , H. W. Ke , D. Keane , A. Kechechyan , A. Kesich , Z. H. Khan , D. P. Kikola , I. Kisel , A. Kisiel , D. D. Koetke , T. Kollegger , J. Konzer , I. Koralt , L. K. Kosarzewski , L. Kotchenda , A. F. Kraishan , P. Kravtsov , K. Krueger , I. Kulakov , L. Kumar , R. A. Kycia , M. A. C. Lamont , J. M. Landgraf , K. D. Landry , J. Lauret , A. Lebedev , R. Lednicky , J. H. Lee , M. J. LeVine , C. Li , W. Li , X. Li , X. Li , Y. Li , Z. M. Li , M. A. Lisa , F. Liu , T. Ljubicic , W. J. Llope , M. Lomnitz , R. S. Longacre , X. Luo , G. L. Ma , Y. G. Ma , D. M. M. D. Madagodagettige Don , D. P. Mahapatra , R. Majka , S. Margetis , C. Markert , H. Masui , H. S. Matis , D. McDonald , T. S. McShane , N. G. Minaev , S. Mioduszewski , B. Mohanty , M. M. Mondal , D. A. Morozov , M. K. Mustafa , B. K. Nandi , Md. Nasim , T. K. Nayak , J. M. Nelson , G. Nigmatkulov , L. V. Nogach , S. Y. Noh , J. Novak , S. B. Nurushev , G. Odyniec , A. Ogawa , K. Oh , A. Ohlson , V. Okorokov , E. W. Oldag , D. L. Olvitt , M. Pachr , B. S. Page , S. K. Pal , Y. X. Pan , Y. Pandit , Y. Panebratsev , T. Pawlak , B. Pawlik , H. Pei , C. Perkins , W. Peryt , P. Pile , M. Planinic , J. Pluta , N. Poljak , K. Poniatowska , J. Porter , A. M. Poskanzer , N. K. Pruthi , M. Przybycien , P. R. Pujahari , J. Putschke , H. Qiu , A. Quintero , S. Ramachandran , R. Raniwala , S. Raniwala , R. L. Ray , C. K. Riley , H. G. Ritter , J. B. Roberts , O. V. Rogachevskiy , J. L. Romero , J. F. Ross , A. Roy , L. Ruan , J. Rusnak , O. Rusnakova , N. R. Sahoo , P. K. Sahu , I. Sakrejda , S. Salur , J. Sandweiss , E. Sangaline , A. Sarkar , J. Schambach , R. P. Scharenberg , A. M. Schmah , W. B. Schmidke , N. Schmitz , J. Seger , P. Seyboth , N. Shah , E. Shahaliev , P. V. Shanmuganathan , M. Shao , B. Sharma , W. Q. Shen , S. S. Shi , Q. Y. Shou , E. P. Sichtermann , R. N. Singaraju , M. J. Skoby , D. Smirnov , N. Smirnov , D. Solanki , P. Sorensen , H. M. Spinka , B. Srivastava , T. D. S. Stanislaus , J. R. Stevens , R. Stock , M. Strikhanov , B. Stringfellow , M. Sumbera , X. Sun , X. M. Sun , Y. Sun , Z. Sun , B. Surrow , D. N. Svirida , T. J. M. Symons , M. A. Szelezniak , J. Takahashi , A. H. Tang , Z. Tang , T. Tarnowsky , J. H. Thomas , A. R. Timmins , D. Tlusty , M. Tokarev , S. Trentalange , R. E. Tribble , P. Tribedy , B. A. Trzeciak , O. D. Tsai , J. Turnau , T. Ullrich , D. G. Underwood , G. Van Buren , G. van Nieuwenhuizen , M. Vandenbroucke , J. A. Vanfossen , R. Varma , G. M. S. Vasconcelos , A. N. Vasiliev , R. Vertesi , F. Videbæk , Y. P. Viyogi , S. Vokal , A. Vossen , M. Wada , F. Wang , G. Wang , H. Wang , J. S. Wang , X. L. Wang , Y. Wang , Y. Wang , G. Webb , J. C. Webb , G. D. Westfall , H. Wieman , S. W. Wissink , R. Witt , Y. F. Wu , Z. Xiao , W. Xie , K. Xin , H. Xu , J. Xu , N. Xu , Q. H. Xu , Y. Xu , Z. Xu , W. Yan , C. Yang , Y. Yang , Y. Yang , Z. Ye , P. Yepes , L. Yi , K. Yip , I. -K. Yoo , N. Yu , Y. Zawisza , H. Zbroszczyk , W. Zha , J. B. Zhang , J. L. Zhang , S. Zhang , X. P. Zhang , Y. Zhang , Z. P. Zhang , F. Zhao , J. Zhao , C. Zhong , X. Zhu , Y. H. Zhu , Y. Zoulkarneeva , M. Zyzak

Constraining the quark and gluon helicity at STAR

How quarks and gluons conspire to provide the total spin of proton is a long-standing puzzle in quantum chromodynamics (QCD). The unique capability of RHIC, that can provide longitudinally polarized $p+p$ collisions at both $\sqrt{s} = 200$…

High Energy Physics - Experiment · Physics 2024-02-26 Ting Lin

Longitudinal Double-Spin Asymmetries for Forward Di-jet Production in Polarized $pp$ Collisions at $\sqrt{s}$ = 200 GeV

One of the primary goals of the STAR spin program is to determine the contribution of the gluon spin ($\Delta G$) to that of the proton. Recent measurements of the longitudinal double-helicity asymmetry, $A_{LL}$, from inclusive jets place…

High Energy Physics - Experiment · Physics 2017-05-09 Ting Lin

Recent Longitudinal Spin Asymmetry Measurements for Inclusive Jet Production at STAR

We present measurements of the longitudinal spin asymmetry, $A_{LL}$, for the inclusive jet signal at STAR. The data presented here are mid-rapidity jets in the transverse momentum range of $5<pT<35$ GeV/c and come from polarized…

High Energy Physics - Experiment · Physics 2019-08-13 David Staszak

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

One of the primary goals of the RHIC spin program is to determine the spin-dependent gluon distribution, $\Delta g(x)$, of the proton. The measurements of the 2009 longitudinal double-helicity asymmetry, $A_{LL}$, for mid-rapidity inclusive…

High Energy Physics - Experiment · Physics 2019-11-12 Ting Lin

Recent results from the STAR spin program at RHIC

The STAR experiment uses polarized p+p collisions at RHIC to determine the contributions to the spin of the proton from gluon spin and from orbital angular momentum of the quarks and gluons. Selective STAR measurements of the longitudinal…

High Energy Physics - Experiment · Physics 2008-11-26 M. Sarsour

Precision Measurement of the Longitudinal Double-Spin Asymmetry for Dijet Production at Intermediate Pseudorapidity in Polarized Proton+Proton Collisions at $\sqrt{s}$ = 200 GeV

Measurements of the longitudinal double-spin asymmetry, $A_{LL}$, by the STAR experiment have contributed significantly to our understanding of the gluon helicity distribution, $\Delta g(x)$, inside the proton. Results from the 2009…

High Energy Physics - Experiment · Physics 2023-06-21 Zilong Chang , Ting Lin

Extracting the Gluon Piece of the Spin Puzzle: New Inclusive Jet Results from STAR

This contribution presents the most recent mid-rapidity inclusive jet results from 3 pb^-1 of data collected from longitudinally polarized proton collisions at sqrt(s)=200 GeV during the 2005 RHIC run. The inclusive jet asymmetry, a_LL,…

High Energy Physics - Experiment · Physics 2008-07-11 STAR Collaboration , Renee Fatemi

Double Helicity Asymmetries of Forward Neutral Pions from $\sqrt{s}=510$ GeV $pp$ Collisions at STAR

Longitudinally polarized $p+p$ scattering experiments provide access to gluon polarization via measurement of the double helicity asymmetry, $A_{LL}$. At the completion of the 2013 RHIC running period, a significant dataset of $\pi^{0}$s…

High Energy Physics - Experiment · Physics 2018-05-24 Christopher Dilks

Longitudinal double-spin asymmetry for inclusive jet production in p+p collisions at sqrt(s)=200 GeV

We report a new STAR measurement of the longitudinal double-spin asymmetry A_LL for inclusive jet production at mid-rapidity in polarized p+p collisions at a center-of-mass energy of sqrt(s) = 200 GeV. The data, which cover jet transverse…

High Energy Physics - Experiment · Physics 2012-08-27 STAR Collaboration

Recent results of the STAR high-energy polarized proton-proton program at RHIC at BNL

The STAR experiment at the Relativistic Heavy-Ion Collider (RHIC) at Brookhaven National Laboratory (BNL) is carrying out a spin physics program colliding transverse or longitudinal polarized proton beams at $\sqrt{s}=200-500 $GeV to gain a…

High Energy Physics - Experiment · Physics 2008-11-26 Bernd Surrow

Exploring the Spin Structure of the Proton with Two-Body Partonic Scattering at RHIC

The STAR collaboration at the Relativistic Heavy Ion Collider is using polarized proton beams at sqrt{s} = 200 GeV to study the spin structure of the proton. The first results for the double spin helicity dependence of inclusive jet…

High Energy Physics - Experiment · Physics 2008-11-26 J. Sowinski

Inclusive Jet Measurements in Longitudinally Polarized proton-proton Collisions at STAR

Jet production in high energy proton-proton ($p+p$) collisions is dominated by hard QCD subprocesses such as gluon-gluon and quark-gluon scatterings. Therefore $p+p$ is an effective tool to probe the internal distribution of gluons in the…

High Energy Physics - Experiment · Physics 2019-09-27 Zilong Chang

Precision measurement of the longitudinal double-spin asymmetry for dijet production at intermediate pseudorapidity in polarized $pp$ collisions at $\sqrt{s}$ = 200 GeV

The STAR Collaboration reports precise measurements of the longitudinal double-spin asymmetry, $A_{LL}$, for dijet production with at least one jet at intermediate pseudorapidity $0.8 < \eta_{\rm jet} < 1.8$ in polarized proton-proton…

High Energy Physics - Experiment · Physics 2025-07-08 The STAR Collaboration

Constraints on Delta G through Longitudinal Double Spin Asymmetry Measurements of Inclusive Jet Production in Polarized p+p Collisions at 200 GeV

We report measurements of the longitudinal double spin asymmetry for inclusive jet production using polarized p+p collisions at sqrt{s} = 200 GeV at RHIC. Results from the 2005 and 2006 runs are presented. These results set substantial new…

High Energy Physics - Experiment · Physics 2019-08-13 M. Sarsour

Gluon Polarization Measurements from Correlated Probes

These proceedings show the preliminary results of the dijet longitudinal double spin asymmetry $A_{LL}$ in polarized proton-proton collisions at $\sqrt{s} = 200$ GeV for the pseudorapidity range $|\eta| \le 0.8$. The integrated luminosity…

High Energy Physics - Experiment · Physics 2019-08-14 Matthew Walker

Measurements of Delta G/G

Our present information on the gluon polarisation Delta g/g is reviewed. The data from fixed-target lepton-nucleon experiments are in context with the recent data from the RHIC polarised pp collider. The main tools to study Delta g/g in…

High Energy Physics - Experiment · Physics 2008-11-26 G. K. Mallot