@article{oai:tsukuba.repo.nii.ac.jp:00038174,
 author = {PHENI Collaboration and Chujo, T. and 中條, 達也 and Esumi, S. and 江角, 晋一 and Miake, Y. and 三明, 康郎},
 issue = {5},
 journal = {Physical review D},
 month = {Mar},
 note = {We present midrapidity measurements from the PHENIX experiment of large parity-violating single-spin asymmetries of high transverse momentum electrons and positrons from W±/Z decays, produced in longitudinally polarized p+p collisions at center of mass energies of s√=500 and 510 GeV. These asymmetries allow direct access to the antiquark polarized parton distribution functions due to the parity-violating nature of the W-boson coupling to quarks and antiquarks. The results presented are based on data collected in 2011, 2012, and 2013 with an integrated luminosity of 240 pb^-1, which exceeds previous PHENIX published results by a factor of more than 27. These high Q^2 data probe the parton structure of the proton at W mass scale and provide an important addition to our understanding of the antiquark parton helicity distribution functions at an intermediate Bjorken x value of roughly MW/s√=0.16},
 title = {Measurement of parity-violating spin asymmetries in W± production at midrapidity in longitudinally polarized p+p collisions},
 volume = {93},
 year = {2016},
 yomi = {チュウジョウ, タツヤ and エスミ, シンイチ and ミアケ, ヤスオ}
}