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Multiplicity dependence of charged pion, kaon, and (anti)proton production at large transverse momentum in p-Pb collisions at
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The production of charged pions, kaons and (anti)protons has been measured at mid-rapidity (an id="mmlsi2" class="mathmlsrc">an class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316303914&_mathId=si2.gif&_user=111111111&_pii=S0370269316303914&_rdoc=1&_issn=03702693&md5=a6bcb7b69469d31dc0318f66fec13f58" title="Click to view the MathML source">−0.5<y<0an>an class="mathContainer hidden">an class="mathCode">ath altimg="si2.gif" overflow="scroll">0.5<y<0ath>an>an>an>) in p&ndash;Pb collisions at an id="mmlsi1" class="mathmlsrc"><a title="View the MathML source" class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316303914&_mathId=si1.gif&_user=111111111&_pii=S0370269316303914&_rdoc=1&_issn=03702693&md5=1c2ae747013ad8d2a2bc1ccb56bc8b85">ass="imgLazyJSB inlineImage" height="15" width="105" alt="View the MathML source" style="margin-top: -5px; vertical-align: middle" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0370269316303914-si1.gif">a>an class="mathContainer hidden">an class="mathCode">ath altimg="si1.gif" overflow="scroll">sathvariant="normal">NN=5.02 TeVath>an>an>an> using the ALICE detector at the LHC. Exploiting particle identification capabilities at high transverse momentum (an id="mmlsi3" class="mathmlsrc">an class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316303914&_mathId=si3.gif&_user=111111111&_pii=S0370269316303914&_rdoc=1&_issn=03702693&md5=13414abcb31dd6dbfab981dd0084def3" title="Click to view the MathML source">pTan>an class="mathContainer hidden">an class="mathCode">ath altimg="si3.gif" overflow="scroll">pathvariant="normal">Tath>an>an>an>), the previously published an id="mmlsi3" class="mathmlsrc">an class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316303914&_mathId=si3.gif&_user=111111111&_pii=S0370269316303914&_rdoc=1&_issn=03702693&md5=13414abcb31dd6dbfab981dd0084def3" title="Click to view the MathML source">pTan>an class="mathContainer hidden">an class="mathCode">ath altimg="si3.gif" overflow="scroll">pathvariant="normal">Tath>an>an>an> spectra have been extended to include measurements up to 20 GeV/c   for seven event multiplicity classes. The an id="mmlsi3" class="mathmlsrc">an class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316303914&_mathId=si3.gif&_user=111111111&_pii=S0370269316303914&_rdoc=1&_issn=03702693&md5=13414abcb31dd6dbfab981dd0084def3" title="Click to view the MathML source">pTan>an class="mathContainer hidden">an class="mathCode">ath altimg="si3.gif" overflow="scroll">pathvariant="normal">Tath>an>an>an> spectra for pp collisions at an id="mmlsi11" class="mathmlsrc"><a title="View the MathML source" class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316303914&_mathId=si11.gif&_user=111111111&_pii=S0370269316303914&_rdoc=1&_issn=03702693&md5=0e57ad0bb248f456bc87959bd0554927">ass="imgLazyJSB inlineImage" height="15" width="71" alt="View the MathML source" style="margin-top: -5px; vertical-align: middle" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0370269316303914-si11.gif">a>an class="mathContainer hidden">an class="mathCode">ath altimg="si11.gif" overflow="scroll">s=7 TeVath>an>an>an>, needed to interpolate a pp reference spectrum, have also been extended up to 20 GeV/c   to measure the nuclear modification factor (an id="mmlsi6" class="mathmlsrc">an class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316303914&_mathId=si6.gif&_user=111111111&_pii=S0370269316303914&_rdoc=1&_issn=03702693&md5=bb93f544fc6743d67eb3ca7cb0ea856a" title="Click to view the MathML source">RpPban>an class="mathContainer hidden">an class="mathCode">ath altimg="si6.gif" overflow="scroll">Rathvariant="normal">pPbath>an>an>an>) in non-single diffractive p&ndash;Pb collisions.

At intermediate transverse momentum (an id="mmlsi108" class="mathmlsrc">an class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316303914&_mathId=si108.gif&_user=111111111&_pii=S0370269316303914&_rdoc=1&_issn=03702693&md5=9f4f6878d76df75bc68ca19a9ddb846a" title="Click to view the MathML source">2<pT<10 GeV/can>an class="mathContainer hidden">an class="mathCode">ath altimg="si108.gif" overflow="scroll">2<pathvariant="normal">T<10 GeValse">/cath>an>an>an>) the proton-to-pion ratio increases with multiplicity in p&ndash;Pb collisions, a similar effect is not present in the kaon-to-pion ratio. The an id="mmlsi3" class="mathmlsrc">an class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316303914&_mathId=si3.gif&_user=111111111&_pii=S0370269316303914&_rdoc=1&_issn=03702693&md5=13414abcb31dd6dbfab981dd0084def3" title="Click to view the MathML source">pTan>an class="mathContainer hidden">an class="mathCode">ath altimg="si3.gif" overflow="scroll">pathvariant="normal">Tath>an>an>an> dependent structure of such increase is qualitatively similar to those observed in pp and heavy-ion collisions. At high an id="mmlsi3" class="mathmlsrc">an class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316303914&_mathId=si3.gif&_user=111111111&_pii=S0370269316303914&_rdoc=1&_issn=03702693&md5=13414abcb31dd6dbfab981dd0084def3" title="Click to view the MathML source">pTan>an class="mathContainer hidden">an class="mathCode">ath altimg="si3.gif" overflow="scroll">pathvariant="normal">Tath>an>an>an> (an id="mmlsi8" class="mathmlsrc">an class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316303914&_mathId=si8.gif&_user=111111111&_pii=S0370269316303914&_rdoc=1&_issn=03702693&md5=d0ca309d8ec4199226ff18fec4a5eeb6" title="Click to view the MathML source">>10 GeV/can>an class="mathContainer hidden">an class="mathCode">ath altimg="si8.gif" overflow="scroll">>10 GeValse">/cath>an>an>an>), the particle ratios are consistent with those reported for pp and Pb&ndash;Pb collisions at the LHC energies.

At intermediate an id="mmlsi3" class="mathmlsrc">an class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316303914&_mathId=si3.gif&_user=111111111&_pii=S0370269316303914&_rdoc=1&_issn=03702693&md5=13414abcb31dd6dbfab981dd0084def3" title="Click to view the MathML source">pTan>an class="mathContainer hidden">an class="mathCode">ath altimg="si3.gif" overflow="scroll">pathvariant="normal">Tath>an>an>an> the (anti)proton an id="mmlsi6" class="mathmlsrc">an class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316303914&_mathId=si6.gif&_user=111111111&_pii=S0370269316303914&_rdoc=1&_issn=03702693&md5=bb93f544fc6743d67eb3ca7cb0ea856a" title="Click to view the MathML source">RpPban>an class="mathContainer hidden">an class="mathCode">ath altimg="si6.gif" overflow="scroll">Rathvariant="normal">pPbath>an>an>an> shows a Cronin-like enhancement, while pions and kaons show little or no nuclear modification. At high an id="mmlsi3" class="mathmlsrc">an class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316303914&_mathId=si3.gif&_user=111111111&_pii=S0370269316303914&_rdoc=1&_issn=03702693&md5=13414abcb31dd6dbfab981dd0084def3" title="Click to view the MathML source">pTan>an class="mathContainer hidden">an class="mathCode">ath altimg="si3.gif" overflow="scroll">pathvariant="normal">Tath>an>an>an> the charged pion, kaon and (anti)proton an id="mmlsi6" class="mathmlsrc">an class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316303914&_mathId=si6.gif&_user=111111111&_pii=S0370269316303914&_rdoc=1&_issn=03702693&md5=bb93f544fc6743d67eb3ca7cb0ea856a" title="Click to view the MathML source">RpPban>an class="mathContainer hidden">an class="mathCode">ath altimg="si6.gif" overflow="scroll">Rathvariant="normal">pPbath>an>an>an> are consistent with unity within statistical and systematic uncertainties.

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