@article{oai:tsukuba.repo.nii.ac.jp:00052325,
 author = {江角, 晋一 and ESUMI, ShinIchi and 新井田, 貴文 and NIIDA, Takafumi and 小沢, 恭一郎 and OZAWA, Kyoichiro and PHENI Collaboration},
 issue = {1},
 journal = {Physical review D},
 month = {Jul},
 note = {We report the transverse single-spin asymmetries of J/ψ production at forward and backward rapidity, 1.2<|y|<2.2, as a function of J/ψ transverse momentum (pT) and Feynman-x (xF). The data analyzed were recorded by the PHENIX experiment at the Relativistic Heavy Ion Collider in 2015 from p+p, p+Al, and p+Au collisions with transversely polarized proton beams at √sNN=200??GeV. At this collision energy, single-spin asymmetries for heavy-flavor particle production of p+p collisions provide access to the spin-dependent gluon distribution and higher-twist correlation functions inside the nucleon, such as the gluon Qiu-Sterman and trigluon correlation functions. Proton+nucleus collisions offer an excellent opportunity to study nuclear effects on the correlation functions. The data indicate a positive asymmetry at the two-standard-deviation level in the p+p data for 2??GeV/c<pT<10??GeV/c at backward rapidity and negative asymmetries at the two-standard-deviation level in the p+Au data for pT<2??GeV/c at both forward and backward rapidity, while in p+Al collisions the asymmetries are consistent with zero within the range of experimental uncertainties.},
 title = {Single-spin asymmetry of J/ψ production in p+p, p+Al, and p+Au collisions with transversely polarized proton beams at √sNN=200??GeV},
 volume = {98},
 year = {2018},
 yomi = {エスミ, シンイチ and ニイダ, タカフミ and オザワ, キョウイチロウ}
}