112 0

Measurements of B -˃ J/psi at forward rapidity in p plus p collisions at root s=510 GeV

Title
Measurements of B -˃ J/psi at forward rapidity in p plus p collisions at root s=510 GeV
Author
김용균
Keywords
P(P)OVER-BAR COLLISIONS; TEV; PHENIX; COLLIDER; DETECTOR; PROMPT
Issue Date
2017-05
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW D, v. 95, no. 9, Article no. 092002
Abstract
We report the first measurement of the fraction of J/psi mesons coming from B-meson decay (F (B -> J/psi)) in p + p collisions at root 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=. due to B-meson decays from prompt J/psi. The measured value of F (B -> J/psi) is 8.1% +/- 2.3% (stat) +/- 1.9% (syst) for J/psi with transverse momenta 0 < p(T) < 5 GeV/c and rapidity 1.2 < vertical bar y vertical bar < 2.2. The measured fraction F (B -> J/psi) at PHENIX is compared to values measured by other experiments at higher center of mass energies and to fixed-order-next-toleading- logarithm and color-evaporation-model predictions. The b (b) over bar cross section per unit rapidity [d sigma/dy(pp -> b (b) over bar)] extracted from the obtained F (B -> J/psi) and the PHENIX inclusive J/psi 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) mu b. It is consistent with the fixed-order-next-toleading- logarithm calculations.
URI
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.95.092002https://repository.hanyang.ac.kr/handle/20.500.11754/114111
ISSN
2470-0010; 2470-0029
DOI
10.1103/PhysRevD.95.092002
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > NUCLEAR ENGINEERING(원자력공학과) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE