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The production of charged pions, kaons and (anti)protons has been measured atmid-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 identificationcapabilities at high transverse momentum ($p_{\rm T}$), the previouslypublished $p_{\rm T}$ spectra have been extended to include measurements up to20 GeV/$c$ for seven event multiplicity classes. The $p_{\rm T}$ spectra for ppcollisions at $\sqrt{s}=7$ TeV, needed to interpolate a pp reference spectrum,have also been extended up to 20 GeV/$c$ to measure the nuclear modificationfactor ($R_{\rm pPb}$) in non-single diffractive p-Pb collisions. Atintermediate transverse momentum ($2 < p_{\rm T} < 10$\,GeV/$c$) theproton-to-pion ratio increases with multiplicity in p-Pb collisions, a similareffect is not present in the kaon-to-pion ratio. The $p_{\rm T}$ dependentstructure of such increase is qualitatively similar to those observed in pp andheavy-ion collisions. At high $p_{\rm T}$ ($>10$ GeV/$c$), the particle ratiosare consistent with those reported for pp and Pb-Pb collisions at the LHCenergies. At intermediate $p_{\rm T}$ the (anti)proton $R_{\rm pPb}$ shows aCronin-like enhancement, while pions and kaons show little or no nuclearmodification. At high $p_{\rm T}$ the charged pion, kaon and (anti)proton$R_{\rm pPb}$ are consistent with unity within statistical and systematicuncertainties.

physics letters b

Multiplicity dependence of charged pion, kaon, and (anti)proton  production at large transverse momentum in p-Pb collisions at  $\mathbf{\sqrt{{\textit s}_{\rm NN}}}$ = 5.02 TeV