Nonperturbative-transverse-momentum effects and evolution in dihadron and direct photon-hadron angular correlations in p+p collisions at √s = 510 GeV

0487771 - FZÚ 2018 RIV US eng J - Článek v odborném periodiku
Adare, A. - Aidala, C. - Ajitanand, N.N. - Tomášek, Lukáš - Vrba, Václav … celkem 466 autorů
Nonperturbative-transverse-momentum effects and evolution in dihadron and direct photon-hadron angular correlations in p+p collisions at √s = 510 GeV.
Physical Review D. Roč. 95, č. 7 (2017), s. 1-19, č. článku 072002. ISSN 2470-0010. E-ISSN 2470-0029
Institucionální podpora: RVO:68378271
Klíčová slova: Drell-Yan process * fragmentation * quantum chromodynamics * factorization * violation * PYTHIA * PHENIX * 510 GeV-cms
Obor OECD: Particles and field physics
Impakt faktor: 4.394, rok: 2017

Dihadron and isolated direct photon-hadron angular correlations are measured in p+p collisions at s=510  GeV. Correlations of charged hadrons of 0.7<pT<10  GeV/c with π0 mesons of 4<pT<15  GeV/c or isolated direct photons of 7<pT<15  GeV/c are used to study nonperturbative effects generated by initial-state partonic transverse momentum and final-state transverse momentum from fragmentation. The nonperturbative behavior is characterized by measuring the out-of-plane transverse momentum component pout perpendicular to the axis of the trigger particle, which is the high-pT direct photon or π0. Nonperturbative evolution effects are extracted from Gaussian fits to the away-side inclusive-charged-hadron yields for different trigger-particle transverse momenta (pTtrig).

Trvalý link: http://hdl.handle.net/11104/0282406