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1、TheLUCIAEmodelpredictionsonthelightvectormesonproductioninproton-proton,proton-nucleusandnucleus-nucleuscollisionsat158AGeVarXiv:hep-ex/0501024v111Jan2005M.Atayan,H.GulkanyanYerevanPhysicsInstitute,ArmeniaAbstractTheLUCIAEmodelpredictionsarecomparedwithexp
2、erimentaldataonlightvectormeson(ρ,ω,φ)productioninpp,p+PbandPb+Pbcollisionsat158AGeV.Themodelreproducesthegeneraltrendsofthedata,butfailsindescribingtheyieldofhigh-pTvectormesonsinthecentralPb+Pbcollisions.PredictionsforIn+Inandp+A(AvaryingfromBetoU)collis
3、ionsat158AGeVarealsopresented.1IntroductionTheenhancementofthestrangequarkproductioninheavyioncollisions,inparticular,theenhancedyieldofφmesonrelativetonon-strangeρandωmesonsissuggestedasapossiblesignatureofquark-gluonplasma(QGP)formation[1,2].Ontheotherha
4、nd,suchanenhancementisalsopredictedbyconventional(noQGP)models,inparticular,bytheLUCIAE[3],anupdatedversionoftheFRITIOFmodel[4,5].Thefirstandmostdetailedexperimentaldataonthelightvectormeson(ρ,ω,φ)productioninnuclearcollisionsareobtainedattheCERNSPS.However
5、,uptonownoattemptwasundertakentodescribesimultaneouslythesedataintheframeworkofauniqueapproach.InthisNote,theLUCIAEmodelisemployed(withsomewhatupdatedparameters)tocomparethetheoreticalpredictionswiththeexistingdataonφand(ρ+ω)productioninpp,p+PbandPb+Pbcoll
6、isionsat158AGeV[6,7].InSection2,theparametersgoverningthestrangeparticleyieldandthetransversemomentumdistributionofproducedhadronsaredescribed.Section3isdevotedtothecomparisonofthemodelpredictionswithexperimentaldata.PredictionsforIn+Inandp+A(AvaryingfromB
7、etoU)collisionsarealsopresented.TheresultsaresummarizedinSection4.2ThemodelparametersThechoiceoftheLUCIAEmodelparametersgoverningthemultiplicityandtransversemo-mentumdistributionsoffinalparticlesproducedinnucleon-nucleon(hadron-nucleon)colli-sionsatSPSenerg
8、iesismotivatedin[8]fromthecomparisonwithexperimentaldata.Thefollowingvaluesofparameters,someofwhichdifferfromthedefaultones[5],willbeusedbelow:-TheminimumtransversemomentumqTmintransferredduringthe(semi)hardsc
