Measurements of double-helicity asymmetries in inclusive J/Psi production in longitudinally polarized p plus p collisions at root s=510 GeV Adare, Andrew Apadula, Nicole Ogilvie, Craig Ding, Lei Hill, John Hotvedt, Nels Lajoie, John Lebedev, Alexandre Ogilvie, Craig Patel, Milap Perry, Joshua Rinn, Timothy Rosati, Marzia Sen, Abhisek Shimomura, M. Timilsina, Arbin Whitaker, Shawn et al.
dc.contributor.department Physics and Astronomy 2018-02-18T09:59:05.000 2020-06-30T06:18:00Z 2020-06-30T06:18:00Z Fri Jan 01 00:00:00 UTC 2016 2016-12-29
dc.description.abstract <p>We report the double-helicity asymmetry, A(LL)(J/Psi), in inclusive J/Psi production at forward rapidity as a function of transverse momentum p(T) and rapidity |y|. The data analyzed were taken during root s = 510 GeV longitudinally polarized p + p collisions at the Relativistic Heavy Ion Collider in the 2013 run using the PHENIX detector. At this collision energy, J/Psi particles are predominantly produced through gluon-gluon scatterings, thus A(LL)(J/Psi) is sensitive to the gluon polarization inside the proton. We measured A(LL)(J/Psi) by detecting the decay daughter muon pairs mu(+)mu(-) within the PHENIX muon spectrometers in the rapidity range 1.2 < |y| < 2.2. In this kinematic range, we measured the A(LL)(J/Psi) to be 0.012 +/- 0.010 (stat) +/- 0.003 (syst). The A(LL)(J.Psi) can be expressed to be proportional to the product of the gluon polarization distributions at two distinct ranges of Bjorken x: one at moderate range x approximate to 5 x 10(-2) where recent data of jet and pi(0) double helicity spin asymmetries have shown evidence for significant gluon polarization, and the other one covering the poorly known small-x region x approximate to 2 x 10(-3). Thus our new results could be used to further constrain the gluon polarization for x < 5 x 10(-2).</p>
dc.description.comments <p>This article is from <em>Physical Review D</em> 94 (2016): 112008, doi:<a href="" target="_blank">10.1103/PhysRevD.94.112008</a>. Posted with permission.</p>
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dc.identifier archive/
dc.identifier.articleid 1211
dc.identifier.contextkey 10135777
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath physastro_pubs/230
dc.language.iso en
dc.source.bitstream archive/|||Fri Jan 14 22:47:12 UTC 2022
dc.source.uri 10.1103/PhysRevD.94.112008
dc.subject.disciplines Elementary Particles and Fields and String Theory
dc.subject.disciplines Physics
dc.title Measurements of double-helicity asymmetries in inclusive J/Psi production in longitudinally polarized p plus p collisions at root s=510 GeV
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 0c7465f3-a076-4319-9513-6cd51186bbf6
relation.isOrgUnitOfPublication 4a05cd4d-8749-4cff-96b1-32eca381d930
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