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1、Physicists2inSyracuseUniversity'sCollegeofArtsandScienceshaveconfirmedtheexistenceoftworarepentaquarkstates.Theirdiscovery,whichhastakenplaceattheCERNLargeHadronCollider(LHC)inGeneva,Switzerland,issaidtohavemajorimplicationsforthestudyofthestructureofmatter.Italsop
2、utstoresta51-year-oldmystery,inwhichAmericanphysicist1MurrayGell-Mannfamouslyposited3theexistenceoffundamentalsubatomicconstituents5calledquarks,whichformparticlessuchasprotons.In1964,hesaidthat,inadditiontoaconstituent4withthreequarks,therecouldbeonewithfourquarks
3、andananti-quark,knownasa"pentaquark."Untilnow,thesearchforpentaquarkshasbeenfruitless."Thestatistical6evidenceofthesenewpentatquarkstatesisbeyondquestion,"saysSheldonStone,Distinguished7ProfessorofPhysics,whohelpedengineerthediscovery."Althoughsomepositiveevidencew
4、asreportedaround10yearsago,thoseresultshavebeenthoroughly8debunked9.Sincethen,theLHCb[LargeHadronColliderbeauty]collaboration10hasbeenparticularlydeliberateinitsstudy."InadditiontoStone,theresearchteamincludesotherphysicistswithtiestoSyracuse:TomaszSkwarnicki,profe
5、ssorofphysics;NathanJurikG'16,aPh.D.student;andLimingZhang,aformerUniversityresearchassociatewhoisnowanassociateprofessoratTsinghuaUniversityinBeijing,China.Liming,infact,ispresentingthefindingsataLHCbworkshoponWednesday,July22,atCERN.StonecreditsGell-Mann,aNobelPr
6、ize-winningscientistwhospentmuchofhiscareeratCaltech,forpostulating11theexistenceofquarks,whicharefractionallychargedobjectsthatmakeupmatter."Hepredictedthatstronglyinteractingparticles[hadrons]areformedfromquark-antiquarkpairs[mesons]orfromthreequarks[baryons],"St
7、onesays."Thisclassificationscheme,whichhasgrowntoencompass12hadronswithfourandfivequarks,underscorestheStandardModel,whichexplainsthephysicalmake-upoftheUniverse."词汇解析表1physicistn.物理学家，研究物理学的人参考例句：Heisaphysicistofthefirstrank.他是一流的物理学家。Thesuccessfulphysicistneverpu
8、tsonairs.这位卓有成就的物理学家从不摆架子。2physicists物理学家(physicist的名词复数)参考例句：Formanyparticlephysicists,however,itwasayearoffrustration.对于许多粒子物理学家来说，这是受挫折的一年。来自英
