Measurement of electrons from heavy-flavour hadron decays in p-Pb collisions at
详细信息    查看全文
文摘
The production of electrons from heavy-flavour hadron decays was measured as a function of transverse momentum (d="mmlsi2" class="mathmlsrc">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">pTdden">de">pT) in minimum-bias p&ndash;Pb collisions at d="mmlsi1" class="mathmlsrc">data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315010151&_mathId=si1.gif&_user=111111111&_pii=S0370269315010151&_rdoc=1&_issn=03702693&md5=b1cc8bc8ab2427eca86dd7d4f446f259">dth="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-S0370269315010151-si1.gif">dden">de">sNN=5.02 TeV using the ALICE detector at the LHC. The measurement covers the d="mmlsi2" class="mathmlsrc">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">pTdden">de">pT interval d="mmlsi117" class="mathmlsrc">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/cdden">de">0.5<pT<12 GeV/c and the rapidity range d="mmlsi129" class="mathmlsrc">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<0.135dden">de">1.065<ycms<0.135 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 d="mmlsi114" class="mathmlsrc">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">RpPbdden">de">RpPb was calculated by comparing the d="mmlsi2" class="mathmlsrc">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">pTdden">de">pT-differential invariant cross section in p&ndash;Pb collisions to a pp reference at the same centre-of-mass energy, which was obtained by interpolating measurements at d="mmlsi116" class="mathmlsrc">data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315010151&_mathId=si116.gif&_user=111111111&_pii=S0370269315010151&_rdoc=1&_issn=03702693&md5=6f276a89225c9273288785adedf62c11">dth="90" 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-S0370269315010151-si116.gif">dden">de">s=2.76 TeV and d="mmlsi126" class="mathmlsrc">data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315010151&_mathId=si126.gif&_user=111111111&_pii=S0370269315010151&_rdoc=1&_issn=03702693&md5=9c935ad32becaa97c21d560af0879b6e">dth="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-S0370269315010151-si126.gif">dden">de">s=7 TeV. The d="mmlsi114" class="mathmlsrc">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">RpPbdden">de">RpPb is consistent with unity within uncertainties of about 25%, which become larger for d="mmlsi2" class="mathmlsrc">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">pTdden">de">pT below d="mmlsi10" class="mathmlsrc">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/cdden">de">1 GeV/c. The measurement shows that heavy-flavour production is consistent with binary scaling, so that a suppression in the high-d="mmlsi2" class="mathmlsrc">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">pTdden">de">pT yield in Pb&ndash;Pb collisions has to be attributed to effects induced by the hot medium produced in the final state. The data in p&ndash;Pb collisions are described by recent model calculations that include cold nuclear matter effects.

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700