Angular decay coefficients of J /ψ mesons at forward rapidity from p+p collisions at √s =510 GeV

0519183 - FZÚ 2020 RIV US eng J - Článek v odborném periodiku
Adare, A. - Aidala, C. - Ajitanand, N.N. - Vrba, Václav … celkem 396 autorů
Angular decay coefficients of J /ψ mesons at forward rapidity from p+p collisions at √s =510 GeV.
Physical Review D. Roč. 95, č. 9 (2017), s. 1-13, č. článku 092003. ISSN 2470-0010. E-ISSN 2470-0029
Institucionální podpora: RVO:68378271
Klíčová slova: J/psi(3100): transverse momentum * helicity * numerical calculations: Monte Carlo * experimental results * 510 GeV-cms
Obor OECD: Particles and field physics
Impakt faktor: 4.394, rok: 2017
Způsob publikování: Omezený přístup
https://doi.org/10.1103/physrevd.95.092003

We report the first measurement of the full angular distribution for inclusive J/ψ→μ+μ− decays in p+p collisions at s√=510 GeV. The measurements are made for J/ψ transverse momentum 2<pT<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 λθ is strongly negative at low pT and becomes close to zero at high pT, while the azimuthal coefficient λϕ is close to zero at low pT, and becomes slightly negative at higher pT. The frame-independent coefficient λ~ is strongly negative at all pT in all frames. The data are compared to the theoretical predictions provided by nonrelativistic quantum chromodynamics models.

Trvalý link: http://hdl.handle.net/11104/0304213