@article{oai:tsukuba.repo.nii.ac.jp:00041461,
 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 = {9},
 journal = {Physical review D},
 month = {},
 note = {We report the first measurement of the fraction of J/ψ mesons coming from B-meson decay (FB→J/ψ) in p+p collisions at √s=510 GeV. The measurement is performed using the forward silicon vertex detector and central vertex detector at PHENIX, which provide precise tracking and distance-of-closest-approach determinations, enabling the statistical separation of J/ψ due to B-meson decays from prompt J/ψ. The measured value of FB→J/ψ is 8.1%±2.3%(stat)±1.9%(syst) for J/ψ with transverse momenta 0<pT<5 GeV/c and rapidity 1.2<|y|<2.2. The measured fraction FB→J/ψ at PHENIX is compared to values measured by other experiments at higher center of mass energies and to fixed-order-next-to-leading-logarithm and color-evaporation-model predictions. The b￣b cross section per unit rapidity [dσ/dy(pp→b￣b)] extracted from the obtained FB→J/ψ and the PHENIX inclusive J/ψ cross section measured at 200 GeV scaled with color-evaporation-model calculations, at the mean B hadron rapidity y=±1.7 in 510 GeV p+p collisions, is 3.63_(-1.70)^(+1.92) μb. It is consistent with the fixed-order-next-to-leading-logarithm calculations.},
 title = {Measurements of B→J/ψ at forward rapidity in p+p collisions at √s=510 GeV},
 volume = {95},
 year = {2017},
 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}
}