Publication: Nonperturbative-transverse-momentum broadening in dihadron angular correlations in root S-NN=200 GeV proton-nucleus collisions
Дата
2019
Авторы
Aidala, C.
Akiba, Y.
Alfred, M.
Andrieux, V.
Blau, D. S.
Riabov, V.
Samsonov, V.
Taranenko, A.
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Аннотация
The PHENIX collaboration has measured high-P T dihadron correlations in p + p, p + A1, and p + Au collisions at root S-NN = 200 GeV. The correlations arise from inter- and intrajet correlations and thus have sensitivity to nonperturbative effects in both the initial and final states. The distributions of p(out), the transverse-momentum component of the associated hadron perpendicular to the trigger hadron, are sensitive to initial-and final-state transverse momenta. These distributions are measured multidifferentially as a function of x(E), the longitudinal momentum fraction of the associated hadron with respect to the trigger hadron. The near-side p(out) widths, sensitive to fragmentation transverse momentum, show no significant broadening between p + Au, p + A1, and p + p. The away-side nonperturbative p(out) widths are found to be broadened in p + Au when compared to p + p; however, there is no significant broadening in p + A1 compared to p + p collisions. The data also suggest that the away-side p(out) broadening is a function of N-coll, the number of binary nucleon-nucleon collisions, in the interaction. The potential implications of these results with regard to initial- and final-state transverse-momentum broadening and energy loss of partons in a nucleus, among other nuclear effects, are discussed.
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Nonperturbative-transverse-momentum broadening in dihadron angular correlations in root S-NN=200 GeV proton-nucleus collisions / Aidala, C [et al.] // Physical Review C. - 2019. - 99. - № 4. - 10.1103/PhysRevC.99.044912
URI
https://www.doi.org/10.1103/PhysRevC.99.044912
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https://openrepository.mephi.ru/handle/123456789/16913
https://www.scopus.com/record/display.uri?eid=2-s2.0-85064855873&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000465169900006
https://openrepository.mephi.ru/handle/123456789/16913