@article{oai:tsukuba.repo.nii.ac.jp:00052327, 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 = {7}, journal = {Physical review D}, month = {Apr}, note = {PHENIX reports differential cross sections of μμ pairs from semileptonic heavy-flavor decays and the Drell-Yan production mechanism measured in p+p collisions at √s=200??GeV at forward and backward rapidity (1.2<|η|<2.2). The μμ pairs from c ̄c, b ̄b, and Drell-Yan are separated using a template fit to unlike- and like-sign muon pair spectra in mass and pT. The azimuthal opening angle correlation between the muons from c ̄c and b ̄b decays and the pair-pT distributions are compared to distributions generated using pythia and powheg models, which both include next-to-leading order processes. The measured distributions for pairs from c ̄c are consistent with pythia calculations. The c ̄c data present narrower azimuthal correlations and softer pT distributions compared to distributions generated from powheg. The b ̄b data are well described by both models. The extrapolated total cross section for bottom production is 3.75±0.24(stat)±0.350.50(syst)±0.45(global)??[μb], which is consistent with previous measurements at the Relativistic Heavy Ion Collider in the same system at the same collision energy and is approximately a factor of 2 higher than the central value calculated with theoretical models. The measured Drell-Yan cross section is in good agreement with next-to-leading-order quantum-chromodynamics calculations.}, title = {Measurements of μμ pairs from open heavy flavor and Drell-Yan in p+p collisions at √s=200??GeV}, volume = {99}, year = {2019}, 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} }