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Measurements of double-helicity asymmetries in inclusive J/ψ production in longitudinally polarized p+p collisions at √s=510 GeV
http://hdl.handle.net/2241/00145322
http://hdl.handle.net/2241/0014532289fb0bdf-9575-4656-80fa-b14259030e60
名前 / ファイル | ライセンス | アクション |
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PRD_94-11 (413.8 kB)
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Item type | Journal Article(1) | |||||
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公開日 | 2017-02-27 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Measurements of double-helicity asymmetries in inclusive J/ψ production in longitudinally polarized p+p collisions at √s=510 GeV | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
著者 |
PHENI Collaboration
× PHENI Collaboration× 中條, 達也× 江角, 晋一× 三明, 康郎 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We report the double-helicity asymmetry, AJ/ψLL, in inclusive J/ψ production at forward rapidity as a function of transverse momentum pT and rapidity |y|. The data analyzed were taken during √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/ψ particles are predominantly produced through gluon-gluon scatterings, thus AJ/ψLL is sensitive to the gluon polarization inside the proton. We measured AJ/ψLL by detecting the decay daughter muon pairs μ+μ- within the PHENIX muon spectrometers in the rapidity range 1.2<|y|<2.2. In this kinematic range, we measured the AJ/ψLL to be 0.012±0.010 (stat) ±0.003 (syst). The AJ/ψLL 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≈5×10^-2 where recent data of jet and π^0 double helicity spin asymmetries have shown evidence for significant gluon polarization, and the other one covering the poorly known small-x region x≈2×10^-3. Thus our new results could be used to further constrain the gluon polarization for x<5×10^-2. | |||||
言語 | en | |||||
書誌情報 |
en : Physical review D 巻 94, 号 11, p. 112008, 発行日 2016-12 |
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ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 2470-0010 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00773624 | |||||
PubMed番号 | ||||||
識別子タイプ | PMID | |||||
関連識別子 | 25170701 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1103/PhysRevD.94.112008 | |||||
権利 | ||||||
言語 | en | |||||
権利情報 | (c) 2016 American Physical Society | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
出版者 | ||||||
言語 | en | |||||
出版者 | American Physical Society |