Multiplicity dependence of pion, kaon, proton and lambda production in p–Pb collisions at s NN = 5.02 TeV
Betty Abeleva, J. Adamb, D. Adamovác, Andrew Marshall Adared, M. M. Aggarwale, G. Aglieri Rinellaf, M. Agnellog h, Andras Gabor Agocsi, Andrea Agostinellij k, Z. Ahammedl, N. Ahmadm, A. Ahmad Masoodim, Ijaz Ahmedn, S. U. Ahno, S. U. Ahno, I. Aimog h, S. Aiolad, M. Ajazn, A. Akindinovp, D. Aleksandrovq, B. Alessandroh r, D. Alexandrer s, A. Alicir t u, A. Alkinv, J. Almer w, T. Altr x, Valerio Altinir y, S. Altinpinarr z, I. Altsybeevr aa, Caio A. G. Prador ab and 912 others
- aLawrence Livermore National Laboratory, Livermore, CA, United States
- bFaculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Prague, Czech Republic
- cNuclear Physics Institute, Academy of Sciences of the Czech Republic, Řež u Prahy, Czech Republic
- dYale University, New Haven, CT, United States
- ePhysics Department, Panjab University, Chandigarh, India
- fEuropean Organization for Nuclear Research (CERN), Geneva, Switzerland
- gPolitecnico di Torino, Turin, Italy
- hSezione INFN, Turin, Italy
- iWigner Research Centre for Physics, Hungarian Academy of Sciences, Budapest, Hungary
- jDipartimento di Fisica e Astronomia dellʼUniversità and Sezione INFN, Bologna, Italy
- kDipartimento di Fisica e Astronomia dell'Università and Sezione INFN, Bologna, Italy
- lVariable Energy Cyclotron Centre, Kolkata, India
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Abstract
In this Letter, comprehensive results on π ± , K ± , K S 0 , p( p ¯ ) and Λ ( Λ ¯ ) production at mid-rapidity ( 0 < y CMS < 0.5 ) in p–Pb collisions at s NN = 5.02 TeV , measured by the ALICE detector at the LHC, are reported. The transverse momentum distributions exhibit a hardening as a function of event multiplicity, which is stronger for heavier particles. This behavior is similar to what has been observed in pp and Pb–Pb collisions at the LHC. The measured p T distributions are compared to d–Au, Au–Au and Pb–Pb results at lower energy and with predictions based on QCD-inspired and hydrodynamic models .