Color plasma oscillation in strangelets(9)

Toconclude,webrie yaddresswhattypeoftracesastrangelet,ifformedinheavy-ioncollisionexperiments[23]performedatabeamenergyoforder200GeVpernucleonona xedtarget,couldleaveviaexcitationsofthelongitudinalcolorplasmons.Immediatelyaftercentralnucleus-nucleuscollisionsatsuchenergies,itisexpectedthataquark-gluonplasmawouldbeproducedintheresultingmatterofsu cientlyhighenergydensity.Then,thequark-gluonplasmamightdevelopintostrangeletsviapre-freeze-outevaporationofpions,K+,andK0whichcarryawayentropyandantistrangenessfromthesystem.Thisstrangenessdistillationmechanism,suggestedbyGreineretal.

[24],wouldworkaslongasstrangeletsarestableagainststrongdecay.Notethatthefreezeouttemperature～100–200MeV[25]iscomparablewiththefrequencyωpforrealisticvaluesofαsintherange～0.4–1.Longitudinalcolorplasmaoscillationswouldthusbethermallyexcitedinstrangeletsuntilthetemperaturefullydrops.Onatimescale1oforderΓ tot,theexcitedcolorplasmonswoulddecayintoquarkparticle-holepairs,leadingtoemissionofphotonsandleptonpairsviaelectromagneticinteractions.Theseelectromagneticsignals,havingenergyoforderorlessthan～ωp,mightbeobservedinthehighlyenergeticheavy-ioncollisionsatCERN’sSPSexperiments[23].Inordertosupportthepicturementionedabove,however,estimatesallowingforrelaxationprocessesoccurringinsuchacooledand

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