Multi-strange baryon production in pPb collisions at
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The multi-strange baryon yields in Pb<font color=single bond" data-inlimg="/entities/sbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">script><font color=single bond" src="http://cdn.els-cdn.com/sd/entities/sbnd" class="glyphImg">script>Pb collisions have been shown to exhibit an enhancement relative to pp reactions. In this work, Ξ and Ω production rates have been measured with the ALICE experiment as a function of transverse momentum, <span id="mmlsi2" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316301745&_mathId=si2.gif&_user=111111111&_pii=S0370269316301745&_rdoc=1&_issn=03702693&md5=16a421cafa0e2a0e956387184f993c7f" title="Click to view the MathML source">p<sub>Tsub>span><span class="mathContainer hidden"><span class="mathCode">si2.gif" overflow="scroll">sub>pTsub>span>span>span>, in p<font color=single bond" data-inlimg="/entities/sbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">script><font color=single bond" src="http://cdn.els-cdn.com/sd/entities/sbnd" class="glyphImg">script>Pb collisions at a centre-of-mass energy of <span id="mmlsi1" class="mathmlsrc">source" class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316301745&_mathId=si1.gif&_user=111111111&_pii=S0370269316301745&_rdoc=1&_issn=03702693&md5=22ecafd7b47a44afcb612cc29dfc064b">ss="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-S0370269316301745-si1.gif">script>style="vertical-align:bottom" width="105" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els-cdn.com/content/image/1-s2.0-S0370269316301745-si1.gif">script><span class="mathContainer hidden"><span class="mathCode">si1.gif" overflow="scroll">sqrt>sub>sNNsub>sqrt>=5.02 TeVspan>span>span>. The results cover the kinematic ranges <span id="mmlsi4" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316301745&_mathId=si4.gif&_user=111111111&_pii=S0370269316301745&_rdoc=1&_issn=03702693&md5=4d11b492fbd8d1bc70d8e60f5649216e" title="Click to view the MathML source">0.6 GeV/c<p<sub>Tsub><7.2 GeV/cspan><span class="mathContainer hidden"><span class="mathCode">si4.gif" overflow="scroll">0.6 GeVstretchy="false">/c<sub>pTsub><7.2 GeVstretchy="false">/cspan>span>span> and <span id="mmlsi5" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316301745&_mathId=si5.gif&_user=111111111&_pii=S0370269316301745&_rdoc=1&_issn=03702693&md5=b5324ea13fd912edfc17796789fe720f" title="Click to view the MathML source">0.8 GeV/c<p<sub>Tsub><5 GeV/cspan><span class="mathContainer hidden"><span class="mathCode">si5.gif" overflow="scroll">0.8 GeVstretchy="false">/c<sub>pTsub><5 GeVstretchy="false">/cspan>span>span>, for Ξ and Ω respectively, in the common rapidity interval <span id="mmlsi6" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316301745&_mathId=si6.gif&_user=111111111&_pii=S0370269316301745&_rdoc=1&_issn=03702693&md5=1ee0a5fb2233cf0f6317de667943088c" title="Click to view the MathML source">&minus;0.5<y<sub>CMSsub><0span><span class="mathContainer hidden"><span class="mathCode">si6.gif" overflow="scroll">&minus;0.5<sub>yCMSsub><0span>span>span>. Multi-strange baryons have been identified by reconstructing their weak decays into charged particles. The <span id="mmlsi2" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316301745&_mathId=si2.gif&_user=111111111&_pii=S0370269316301745&_rdoc=1&_issn=03702693&md5=16a421cafa0e2a0e956387184f993c7f" title="Click to view the MathML source">p<sub>Tsub>span><span class="mathContainer hidden"><span class="mathCode">si2.gif" overflow="scroll">sub>pTsub>span>span>span> spectra are analysed as a function of event charged-particle multiplicity, which in p<font color=single bond" data-inlimg="/entities/sbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">script><font color=single bond" src="http://cdn.els-cdn.com/sd/entities/sbnd" class="glyphImg">script>Pb collisions ranges over one order of magnitude and lies between those observed in pp and Pb<font color=single bond" data-inlimg="/entities/sbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">script><font color=single bond" src="http://cdn.els-cdn.com/sd/entities/sbnd" class="glyphImg">script>Pb collisions. The measured <span id="mmlsi2" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316301745&_mathId=si2.gif&_user=111111111&_pii=S0370269316301745&_rdoc=1&_issn=03702693&md5=16a421cafa0e2a0e956387184f993c7f" title="Click to view the MathML source">p<sub>Tsub>span><span class="mathContainer hidden"><span class="mathCode">si2.gif" overflow="scroll">sub>pTsub>span>span>span> distributions are compared to the expectations from a Blast-Wave model. The parameters which describe the production of lighter hadron species also describe the hyperon spectra in high multiplicity p<font color=single bond" data-inlimg="/entities/sbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">script><font color=single bond" src="http://cdn.els-cdn.com/sd/entities/sbnd" class="glyphImg">script>Pb collisions. The yield of hyperons relative to charged pions is studied and compared with results from pp and Pb<font color=single bond" data-inlimg="/entities/sbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">script><font color=single bond" src="http://cdn.els-cdn.com/sd/entities/sbnd" class="glyphImg">script>Pb collisions. A continuous increase in the yield ratios as a function of multiplicity is observed in p<font color=single bond" data-inlimg="/entities/sbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">script><font color=single bond" src="http://cdn.els-cdn.com/sd/entities/sbnd" class="glyphImg">script>Pb data, the values of which range from those measured in minimum bias pp to the ones in Pb<font color=single bond" data-inlimg="/entities/sbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">script><font color=single bond" src="http://cdn.els-cdn.com/sd/entities/sbnd" class="glyphImg">script>Pb collisions. A statistical model qualitatively describes this multiplicity dependence using a canonical suppression mechanism, in which the small volume causes a relative reduction of hadron production dependent on the strangeness content of the hyperon.

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