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1、第26卷增刊高能物理与核物理Vo1.26，Supp.2002年12月HIGHENERGYPHYSICSANDNUCLEARPHYSICSDec.，2002∗KaonFlowinHeavy-IonCollisionsZHENGYu-MingCHUZi-Li(ChinaInstituteofAtomicEnergy,Beijing102413,China)FuchsChristianFaesslerAmand(InstitutfűrTheoretischePhysikderUniversitätTűbingenD-72076Tűbingen
2、,Germany)XIAOWuHUADa-Ping(GraduateSchoolofNuclearIndustry,Beijing102413,China)AbstractThekaonflowinheavy-ioncollisionsatintermediateenergyisstudiedintheQMDmodel.Thecalculatedresultsshowthattheexperimentaldataareonlyconsistentwiththeonesthatincludethekaonmean-fieldpotenti
3、alfromthechiralLagrangian.Thisindicatesthatthesideflowpatternofpositivechargedkaonsisanusefulprobeofthekaonpotentialinnuclearmedium.Keywordsheavy-ioncollision,thekaonflow,thein-mediumkaonpotentialTheknowledgeaboutin-mediummodificationsofthekaonpropertiesisimportantnotonl
4、ytoastrophysicsbutalsotonuclearphysics.Inastrophysicsitisrelatedtoapossibleformationof[1,2]kaoncondensationinneutronstars.Innuclearphysicsthekaonproductioninheavyioncollisionshasattractedmuchattention.Itisfoundthatthekaonyieldinheavyioncollisionsatsubthresholdenergies,i.
5、e.below1.56GeV/nucleon,issensitivetothenuclearequationofstate[3－7](EOS)usedinthetransportmodel.Ontheotherhand,thetransverseflowofkaonsfromheavy[8－11]ionreactionswassuggestedtobeagoodprobeofthekaonpotentialinthenuclearmedium.[12]Thisproblem,however,isstillindebate.Itwaspo
6、intedoutthattheexperimentaldatacanbealternativelydescribedbyinvokingrescatteringeffectsinsteadofin-mediumkaonpotential.[13]Recently,FOPIcollaborationpublishednewdatawithimprovedprecision,whichleadtobepossibletostudyfurtherthisproblem.++Inthispaperthetransverseflowofposit
7、ivechargedkaons(K),i.e.theaverageKin-planetransversemomentumasafunctionofrapidity,inheavyioncollisionsisinvestigatedwithinthe[14,15]frameworkofthequantummoleculardynamics(QMD)model.ForthenuclearEOSweadopt∗SupportedbyNationalNaturalScienceFoundationofChina(19975074)andDeu
8、tscheForschungs-gemeinschaft(446CHV-113/91/1)2高能物理与核物理(HEP&NP)第26卷softSkyrmeforcecorrespondingtoacompre
