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Angular decay coefficients of J/psi mesons at forward rapidity from p plus p collisions at root s=510 GeV

Title
Angular decay coefficients of J/psi mesons at forward rapidity from p plus p collisions at root s=510 GeV
Author
김용균
Keywords
QCD CORRECTIONS; POLARIZATION; PSI
Issue Date
2017-05
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW D, v. 95, no. 9, Article no. 092003
Abstract
We report the first measurement of the full angular distribution for inclusive J/psi -> mu(+)mu(-) decays in p + p collisions at root s = 510 GeV. The measurements are made for J/psi transverse momentum 2 < p(T) < 10 GeV /c and rapidity 1.2 < y < 2.2 in the Helicity, Collins-Soper, and Gottfried-Jackson reference frames. In all frames the polar coefficient lambda theta is strongly negative at low p(T) and becomes close to zero at high p(T), while the azimuthal coefficient lambda phi is close to zero at low p(T), and becomes slightly negative at higher p(T). The frame-independent coefficient lambda is strongly negative at all p(T) in all frames. The data are compared to the theoretical predictions provided by nonrelativistic quantum chromodynamics models.
URI
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.95.092003https://repository.hanyang.ac.kr/handle/20.500.11754/114083
ISSN
2470-0010; 2470-0029
DOI
10.1103/PhysRevD.95.092003
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > NUCLEAR ENGINEERING(원자력공학과) > Articles
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