Publication: Measurement of γ(1S) Elliptic Flow at Forward Rapidity in Pb-Pb Collisions at sNN =5.02 TeV
Дата
2019
Авторы
Acharya, S.
Adamova, D.
Adhya, S. P.
Adler, A.
Belyaev, V.
Bogdanov, A.
Bolozdynya, A.
Borissov, A.
Grigoriev, V.
Kaplin, V.
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Аннотация
© 2019 CERN.The first measurement of the γ(1S) elliptic flow coefficient (v2) is performed at forward rapidity (2.5<y<4) in Pb-Pb collisions at sNN=5.02 TeV with the ALICE detector at the LHC. The results are obtained with the scalar product method and are reported as a function of transverse momentum (pT) up to 15 GeV/c in the 5%-60% centrality interval. The measured γ(1S)v2 is consistent with 0 and with the small positive values predicted by transport models within uncertainties. The v2 coefficient in 2<pT<15 GeV/c is lower than that of inclusive J/ψ mesons in the same pT interval by 2.6 standard deviations. These results, combined with earlier suppression measurements, are in agreement with a scenario in which the γ(1S) production in Pb-Pb collisions at LHC energies is dominated by dissociation limited to the early stage of the collision, whereas in the J/ψ case there is substantial experimental evidence of an additional regeneration component.
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Measurement of γ(1S) Elliptic Flow at Forward Rapidity in Pb-Pb Collisions at sNN =5.02 TeV / Acharya, S. [et al.] // Physical Review Letters. - 2019. - 123. - № 19. - 10.1103/PhysRevLett.123.192301
URI
https://www.doi.org/10.1103/PhysRevLett.123.192301
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https://openrepository.mephi.ru/handle/123456789/18878
https://www.scopus.com/record/display.uri?eid=2-s2.0-85074896931&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000495073200004
https://openrepository.mephi.ru/handle/123456789/18878