Publication: Charged-particle pseudorapidity density at mid-rapidity in p–Pb collisions at √sNN = 8.16 TeV
Дата
2019
Авторы
Acharya, S.
Acosta, F. T.
Adamova, D.
Adhya, S. P.
Belyaev, V.
Bogdanov, A.
Bolozdynya, A.
Grigoriev, V.
Kaplin, V.
Kondratyeva, N.
Journal Title
Journal ISSN
Volume Title
Издатель
Аннотация
© 2019, CERN for the benefit of the ALICE collaboration. The pseudorapidity density of charged particles, d N ch / d η, in p–Pb collisions has been measured at a centre-of-mass energy per nucleon–nucleon pair of sNN = 8.16 TeV at mid-pseudorapidity for non-single-diffractive events. The results cover 3.6 units of pseudorapidity, | η| < 1.8. The d N ch / d η value is 19.1 ± 0.7 at | η| < 0.5. This quantity divided by ⟨ N part ⟩ / 2 is 4.73 ± 0.20 , where ⟨ N part ⟩ is the average number of participating nucleons, is 9.5% higher than the corresponding value for p–Pb collisions at sNN = 5.02 TeV. Measurements are compared with models based on different mechanisms for particle production. All models agree within uncertainties with data in the Pb-going side, while HIJING overestimates, showing a symmetric behaviour, and EPOS underestimates the p-going side of the d N ch / d η distribution. Saturation-based models reproduce the distributions well for η> - 1.3. The d N ch / d η is also measured for different centrality estimators, based both on the charged-particle multiplicity and on the energy deposited in the Zero-Degree Calorimeters. A study of the implications of the large multiplicity fluctuations due to the small number of participants for systems like p–Pb in the centrality calculation for multiplicity-based estimators is discussed, demonstrating the advantages of determining the centrality with energy deposited near beam rapidity.
Описание
Ключевые слова
Цитирование
Charged-particle pseudorapidity density at mid-rapidity in p–Pb collisions at √sNN = 8.16 TeV / Acharya, S. [et al.] // European Physical Journal C. - 2019. - 79. - № 4. - 10.1140/epjc/s10052-019-6801-9
URI
https://www.doi.org/10.1140/epjc/s10052-019-6801-9
https://www.scopus.com/record/display.uri?eid=2-s2.0-85064051779&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000464756900003
https://openrepository.mephi.ru/handle/123456789/16825
https://www.scopus.com/record/display.uri?eid=2-s2.0-85064051779&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000464756900003
https://openrepository.mephi.ru/handle/123456789/16825