@article{oai:tsukuba.repo.nii.ac.jp:02001418,
 author = {中條, 達也 and CHUJO, Tatsuya and 江角, 晋一 and ESUMI, ShinIchi and 新井田, 貴文 and NIIDA, Takafumi and ノビツキー, ノベルト and NOVITZKY, Norbert and 小沢, 恭一郎 and OZAWA, Kyoichiro and 轟木, 貴人 and TODOROKI, Takahito and PHENI Collaboration},
 issue = {3},
 journal = {Physical review D},
 month = {Aug},
 note = {The PHENIX experiment at the Relativistic Heavy Ion Collider has measured the longitudinal double spin asymmetries, ALL, for charged pions at midrapidity (|η|<0.35) in longitudinally polarized p+p collisions at √s=510??GeV. These measurements are sensitive to the gluon spin contribution to the total spin of the proton in the parton momentum fraction x range between 0.04 and 0.09. One can infer the sign of the gluon polarization from the ordering of pion asymmetries with charge alone. The asymmetries are found to be consistent with global quantum-chromodynamics fits of deep-inelastic scattering and data at √s=200??GeV, which show a nonzero positive contribution of gluon spin to the proton spin.},
 title = {Measurement of charged pion double spin asymmetries at midrapidity in longitudinally polarized p+p collisions at √s=510??GeV},
 volume = {102},
 year = {2020},
 yomi = {チュウジョウ, タツヤ and エスミ, シンイチ and ニイダ, タカフミ and ノビツキー, ノベルト and オザワ, キョウイチロウ and トドロキ, タカヒト}
}