Multi-strange baryon production in pPb collisions at
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The multi-strange baryon yields in Pborder="0" alt="single bond" data-inlimg="/entities/sbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">oscript>order="0" alt="single bond" src="http://cdn.els-cdn.com/sd/entities/sbnd" class="glyphImg">oscript>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, ormulatext 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">pTontainer hidden">ode">overflow="scroll">ow>pow>ow>ormal">Tow>, in porder="0" alt="single bond" data-inlimg="/entities/sbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">oscript>order="0" alt="single bond" src="http://cdn.els-cdn.com/sd/entities/sbnd" class="glyphImg">oscript>Pb collisions at a centre-of-mass energy of ource" 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">View the MathML s<font color=ource" 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">oscript>order="0" 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">oscript>ontainer hidden">ode">overflow="scroll">ow>sow>ow>ormal">NNow>o>=o>5.02 TeV. The results cover the kinematic ranges ormulatext 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<pT<7.2 GeV/container hidden">ode">overflow="scroll">0.6 GeVo stretchy="false">/o>co><o>ow>pow>ow>ormal">Tow>o><o>7.2 GeVo stretchy="false">/o>c and ormulatext 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<pT<5 GeV/container hidden">ode">overflow="scroll">0.8 GeVo stretchy="false">/o>co><o>ow>pow>ow>ormal">Tow>o><o>5 GeVo stretchy="false">/o>c, for Ξ and Ω respectively, in the common rapidity interval ormulatext 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">−0.5<yCMS<0ontainer hidden">ode">overflow="scroll">o>−o>0.5o><o>ow>yow>ow>ormal">CMSow>o><o>0. Multi-strange baryons have been identified by reconstructing their weak decays into charged particles. The ormulatext 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">pTontainer hidden">ode">overflow="scroll">ow>pow>ow>ormal">Tow> spectra are analysed as a function of event charged-particle multiplicity, which in porder="0" alt="single bond" data-inlimg="/entities/sbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">oscript>order="0" alt="single bond" src="http://cdn.els-cdn.com/sd/entities/sbnd" class="glyphImg">oscript>Pb collisions ranges over one order of magnitude and lies between those observed in pp and Pborder="0" alt="single bond" data-inlimg="/entities/sbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">oscript>order="0" alt="single bond" src="http://cdn.els-cdn.com/sd/entities/sbnd" class="glyphImg">oscript>Pb collisions. The measured ormulatext 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">pTontainer hidden">ode">overflow="scroll">ow>pow>ow>ormal">Tow> 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 porder="0" alt="single bond" data-inlimg="/entities/sbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">oscript>order="0" alt="single bond" src="http://cdn.els-cdn.com/sd/entities/sbnd" class="glyphImg">oscript>Pb collisions. The yield of hyperons relative to charged pions is studied and compared with results from pp and Pborder="0" alt="single bond" data-inlimg="/entities/sbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">oscript>order="0" alt="single bond" src="http://cdn.els-cdn.com/sd/entities/sbnd" class="glyphImg">oscript>Pb collisions. A continuous increase in the yield ratios as a function of multiplicity is observed in porder="0" alt="single bond" data-inlimg="/entities/sbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">oscript>order="0" alt="single bond" src="http://cdn.els-cdn.com/sd/entities/sbnd" class="glyphImg">oscript>Pb data, the values of which range from those measured in minimum bias pp to the ones in Pborder="0" alt="single bond" data-inlimg="/entities/sbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">oscript>order="0" alt="single bond" src="http://cdn.els-cdn.com/sd/entities/sbnd" class="glyphImg">oscript>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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