Multiplicity dependence of charged pion, kaon, and (anti)proton production at large transverse momentum in p-Pb collisions at \(\sqrt{s_{\rm NN}}\)= 5.02 TeV
Adam, Jaroslav; Adamová, Dagmar; Aggarwal, Madan M.; Aglieri Rinella, Gianluca; Agnello, Michelangelo; Agrawal, Nikita; Ahammed, Zubayer; Ahmad, Shafiq F.; Ahn, Sang Un; Aiola, Salvatore; Alme, Johan; Helstrup, Håvard; Hetland, Kristin Fanebust; Kileng, Bjarte; Altinpinar, Sedat; Djuvsland, Øystein; Haaland, Øystein Senneset; Huang, Meidana; Lønne, Per-Ivar; Nystrand, Joakim; Rehman, Attiq ur; Røhrich, Dieter; Tambave, Ganesh Jagannath; Ullaland, Kjetil; Velure, Arild; Wagner, Boris; Zhang, Hui; Zhou, Zhuo; Zhu, Hongsheng; Arsene, Ionut Christian; Bätzing, Paul Christoph; Dordic, Olja; Lindal, Svein; Mahmood, Sohail Musa; Milosevic, Jovan; Qvigstad, Henrik; Richter, Matthias; Røed, Ketil; Skaali, Toralf Bernhard; Tveter, Trine Spedstad; Wikne, Jon Christopher; Zhao, Chengxin; Langøy, Rune; Lien, Jørgen André; Akindinov, Alexander; Alam, Sk Noor; Alessandro, Bruno; Alexandre, Didier; Alfaro Molina, José Rubén; Alici, Andrea; ALICE, Collaboration
Peer reviewed, Journal article
Published version
Åpne
Permanent lenke
https://hdl.handle.net/1956/16877Utgivelsesdato
2016-09Metadata
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Originalversjon
https://doi.org/10.1016/j.physletb.2016.07.050Sammendrag
The production of charged pions, kaons and (anti)protons has been measured at mid-rapidity \(-0.5 < y < 0\) in p-Pb collisions at \(\sqrt{s_{\rm NN}} = 5.02\) TeV using the ALICE detector at the LHC. Exploiting particle identification capabilities at high transverse momentum \(p_{\rm T}\) , the previously published \(p_{\rm T}\) spectra have been extended to include measurements up to 20 GeV/\).\) for seven multiplicity event classes. The \(p_{\rm T}\) spectra for pp collisions at \(\sqrt{s}=7\) TeV, needed to interpolate a pp reference spectrum, have also been extended up to 20 GeV/\).\) to measure the nuclear modification factor \(R_{\rm pPb}\) in non-single diffractive p-Pb collisions. At intermediate transverse momentum \(2 < p_{\rm T} < 10\) GeV/\).\) the proton-to-pion ratio increases with multiplicity in p-Pb collisions, a similar effect is not present in the kaon-to-pion ratio. The \(p_{\rm T}\) dependent structure of such increase is qualitatively similar to those observed in pp and heavy-ion collisions. At high \(p_{\rm T}\) \(>10\) GeV/\).\) , the particle ratios are consistent with those reported for pp and Pb-Pb collisions at the LHC energies. At intermediate \(p_{\rm T}\) the (anti)proton \(R_{\rm pPb}\) shows a Cronin-like enhancement, while pions and kaons show little or no nuclear modification. At high \(p_{\rm T}\) the charged pion, kaon and (anti)proton \(R_{\rm pPb}\) are consistent with unity within statistical and systematic uncertainties.