Measurement of electrons from heavy-flavour hadron decays in p-Pb collisions at
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The production of electrons from heavy-flavour hadron decays was measured as a function of transverse momentum (pan id="mmlsi2" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315010151&_mathId=si2.gif&_user=111111111&_pii=S0370269315010151&_rdoc=1&_issn=03702693&md5=fc913c73eb2d293f338bf5eac1af122e" title="Click to view the MathML source">pTpan>pan class="mathContainer hidden">pan class="mathCode">pTpan>pan>pan>) in minimum-bias p–Pb collisions at pan id="mmlsi1" class="mathmlsrc">pii=S0370269315010151&_rdoc=1&_issn=03702693&md5=b1cc8bc8ab2427eca86dd7d4f446f259">View the MathML sourcep: -5px; vertical-align: middle" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0370269315010151-si1.gif">pt>View the MathML sourcep://origin-ars.els-cdn.com/content/image/1-s2.0-S0370269315010151-si1.gif">pt>pan class="mathContainer hidden">pan class="mathCode">sNN=5.02 TeVpan>pan>pan> using the ALICE detector at the LHC. The measurement covers the pan id="mmlsi2" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315010151&_mathId=si2.gif&_user=111111111&_pii=S0370269315010151&_rdoc=1&_issn=03702693&md5=fc913c73eb2d293f338bf5eac1af122e" title="Click to view the MathML source">pTpan>pan class="mathContainer hidden">pan class="mathCode">pTpan>pan>pan> interval pan id="mmlsi117" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315010151&_mathId=si117.gif&_user=111111111&_pii=S0370269315010151&_rdoc=1&_issn=03702693&md5=64f08a678f93b10e95cd074cc4808f53" title="Click to view the MathML source">0.5<pT<12 GeV/cpan>pan class="mathContainer hidden">pan class="mathCode">0.5<pT<12 GeV/cpan>pan>pan> and the rapidity range pan id="mmlsi129" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315010151&_mathId=si129.gif&_user=111111111&_pii=S0370269315010151&_rdoc=1&_issn=03702693&md5=75d9e03aaa27e92fff8630c644cede5b" title="Click to view the MathML source">−1.065<ycms<0.135pan>pan class="mathContainer hidden">pan class="mathCode">1.065<ycms<0.135pan>pan>pan> in the centre-of-mass reference frame. The contribution of electrons from background sources was subtracted using an invariant mass approach. The nuclear modification factor pan id="mmlsi114" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315010151&_mathId=si114.gif&_user=111111111&_pii=S0370269315010151&_rdoc=1&_issn=03702693&md5=7870a314240d78af9d436f8136f3b599" title="Click to view the MathML source">RpPbpan>pan class="mathContainer hidden">pan class="mathCode">RpPbpan>pan>pan> was calculated by comparing the pan id="mmlsi2" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315010151&_mathId=si2.gif&_user=111111111&_pii=S0370269315010151&_rdoc=1&_issn=03702693&md5=fc913c73eb2d293f338bf5eac1af122e" title="Click to view the MathML source">pTpan>pan class="mathContainer hidden">pan class="mathCode">pTpan>pan>pan>-differential invariant cross section in p–Pb collisions to a pp reference at the same centre-of-mass energy, which was obtained by interpolating measurements at pan id="mmlsi116" class="mathmlsrc">pii=S0370269315010151&_rdoc=1&_issn=03702693&md5=6f276a89225c9273288785adedf62c11">View the MathML sourcep: -5px; vertical-align: middle" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0370269315010151-si116.gif">pt>View the MathML sourcep://origin-ars.els-cdn.com/content/image/1-s2.0-S0370269315010151-si116.gif">pt>pan class="mathContainer hidden">pan class="mathCode">s=2.76 TeVpan>pan>pan> and pan id="mmlsi126" class="mathmlsrc">pii=S0370269315010151&_rdoc=1&_issn=03702693&md5=9c935ad32becaa97c21d560af0879b6e">View the MathML sourcep: -5px; vertical-align: middle" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0370269315010151-si126.gif">pt>View the MathML sourcep://origin-ars.els-cdn.com/content/image/1-s2.0-S0370269315010151-si126.gif">pt>pan class="mathContainer hidden">pan class="mathCode">s=7 TeVpan>pan>pan>. The pan id="mmlsi114" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315010151&_mathId=si114.gif&_user=111111111&_pii=S0370269315010151&_rdoc=1&_issn=03702693&md5=7870a314240d78af9d436f8136f3b599" title="Click to view the MathML source">RpPbpan>pan class="mathContainer hidden">pan class="mathCode">RpPbpan>pan>pan> is consistent with unity within uncertainties of about 25%, which become larger for pan id="mmlsi2" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315010151&_mathId=si2.gif&_user=111111111&_pii=S0370269315010151&_rdoc=1&_issn=03702693&md5=fc913c73eb2d293f338bf5eac1af122e" title="Click to view the MathML source">pTpan>pan class="mathContainer hidden">pan class="mathCode">pTpan>pan>pan> below pan id="mmlsi10" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315010151&_mathId=si10.gif&_user=111111111&_pii=S0370269315010151&_rdoc=1&_issn=03702693&md5=ac3ba3974d40eee946a81b9971c005df" title="Click to view the MathML source">1 GeV/cpan>pan class="mathContainer hidden">pan class="mathCode">1 GeV/cpan>pan>pan>. The measurement shows that heavy-flavour production is consistent with binary scaling, so that a suppression in the high-pan id="mmlsi2" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315010151&_mathId=si2.gif&_user=111111111&_pii=S0370269315010151&_rdoc=1&_issn=03702693&md5=fc913c73eb2d293f338bf5eac1af122e" title="Click to view the MathML source">pTpan>pan class="mathContainer hidden">pan class="mathCode">pTpan>pan>pan> yield in Pb–Pb collisions has to be attributed to effects induced by the hot medium produced in the final state. The data in p–Pb collisions are described by recent model calculations that include cold nuclear matter effects.

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