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Forward-central two-particle correlations in p-Pb collisions at
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Two-particle angular correlations between trigger particles in the forward pseudorapidity range (<span id="mmlsi2" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315009533&_mathId=si2.gif&_user=111111111&_pii=S0370269315009533&_rdoc=1&_issn=03702693&md5=50991944959a5ad100c5360a61869b8d" title="Click to view the MathML source">2.5<|η|<4.0span><span class="mathContainer hidden"><span class="mathCode">si2.gif" overflow="scroll">2.5<stretchy="false">|ηstretchy="false">|<4.0span>span>span>) and associated particles in the central range (<span id="mmlsi103" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315009533&_mathId=si103.gif&_user=111111111&_pii=S0370269315009533&_rdoc=1&_issn=03702693&md5=b01ed631e008a411b364a8e6e4139d2d" title="Click to view the MathML source">|η|<1.0span><span class="mathContainer hidden"><span class="mathCode">si103.gif" overflow="scroll">stretchy="false">|ηstretchy="false">|<1.0span>span>span>) are measured with the ALICE detector in p&ndash;Pb collisions at a nucleon&ndash;nucleon centre-of-mass energy of 5.02 TeV. The trigger particles are reconstructed using the muon spectrometer, and the associated particles by the central barrel tracking detectors. In high-multiplicity events, the double-ridge structure, previously discovered in two-particle angular correlations at midrapidity, is found to persist to the pseudorapidity ranges studied in this Letter. The second-order Fourier coefficients for muons in high-multiplicity events are extracted after jet-like correlations from low-multiplicity events have been subtracted. The coefficients are found to have a similar transverse momentum (<span id="mmlsi104" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315009533&_mathId=si104.gif&_user=111111111&_pii=S0370269315009533&_rdoc=1&_issn=03702693&md5=f4ce2793cefb176f0b90ceb0fcccb1da" title="Click to view the MathML source">p<sub>Tsub>span><span class="mathContainer hidden"><span class="mathCode">si104.gif" overflow="scroll">sub>pTsub>span>span>span>) dependence in p-going (p&ndash;Pb) and Pb-going (Pb&ndash;p) configurations, with the Pb-going coefficients larger by about <span id="mmlsi5" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315009533&_mathId=si5.gif&_user=111111111&_pii=S0370269315009533&_rdoc=1&_issn=03702693&md5=10f74ce3ddd1cfa42ebdb4609bf9e05c" title="Click to view the MathML source">16&plusmn;6%span><span class="mathContainer hidden"><span class="mathCode">si5.gif" overflow="scroll">16&plusmn;6%span>span>span>, rather independent of <span id="mmlsi104" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315009533&_mathId=si104.gif&_user=111111111&_pii=S0370269315009533&_rdoc=1&_issn=03702693&md5=f4ce2793cefb176f0b90ceb0fcccb1da" title="Click to view the MathML source">p<sub>Tsub>span><span class="mathContainer hidden"><span class="mathCode">si104.gif" overflow="scroll">sub>pTsub>span>span>span> within the uncertainties of the measurement. The data are compared with calculations using the AMPT model, which predicts a different <span id="mmlsi104" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315009533&_mathId=si104.gif&_user=111111111&_pii=S0370269315009533&_rdoc=1&_issn=03702693&md5=f4ce2793cefb176f0b90ceb0fcccb1da" title="Click to view the MathML source">p<sub>Tsub>span><span class="mathContainer hidden"><span class="mathCode">si104.gif" overflow="scroll">sub>pTsub>span>span>span> and η   dependence than observed in the data. The results are sensitive to the parent particle <span id="mmlsi6" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315009533&_mathId=si6.gif&_user=111111111&_pii=S0370269315009533&_rdoc=1&_issn=03702693&md5=a35fbe0e8280b9de20a9c07b54c2d804" title="Click to view the MathML source">v<sub>2sub>span><span class="mathContainer hidden"><span class="mathCode">si6.gif" overflow="scroll">sub>v2sub>span>span>span> and composition of reconstructed muon tracks, where the contribution from heavy flavour decays is expected to dominate at <span id="mmlsi101" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315009533&_mathId=si101.gif&_user=111111111&_pii=S0370269315009533&_rdoc=1&_issn=03702693&md5=ca005e5855bf7c0f4b342410a3237bb5" title="Click to view the MathML source">p<sub>Tsub>>2 GeV/cspan><span class="mathContainer hidden"><span class="mathCode">si101.gif" overflow="scroll">sub>pTsub>>2 GeVstretchy="false">/cspan>span>span>.

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