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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
5
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pubmed:dateCreated |
2007-3-15
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pubmed:abstractText |
The invariant-mass spectrum of e+e- pairs produced in 12C+12C collisions at an incident energy of 2 GeV per nucleon has been measured for the first time. The measured pair production probabilities span over 5 orders of magnitude from the pi(0)-Dalitz to the rho/omega invariant-mass region. Dalitz decays of pi(0) and eta account for all the yield up to 0.15 GeV/c(2), but for only about 50% above this mass. A comparison with model calculations shows that the excess pair yield is likely due to baryon-resonance and vector-meson decays. Transport calculations based on vacuum spectral functions fail, however, to describe the entire mass region.
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pubmed:language |
eng
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pubmed:journal |
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pubmed:status |
PubMed-not-MEDLINE
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pubmed:month |
Feb
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pubmed:issn |
0031-9007
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pubmed:author |
pubmed-author:FernandezCC,
pubmed-author:BertiniDD,
pubmed-author:LangeSS,
pubmed-author:VázquezAA,
pubmed-author:LinsEE,
pubmed-author:WagnerVV,
pubmed-author:GrossiAA,
pubmed-author:SimonR SRS,
pubmed-author:SchröderCC,
pubmed-author:WójcikTT,
pubmed-author:LangSS,
pubmed-author:SchönHH,
pubmed-author:SuhBB,
pubmed-author:HomolkaJJ,
pubmed-author:KoenigWW,
pubmed-author:NaumannLL,
pubmed-author:KühnWW,
pubmed-author:SturmCC,
pubmed-author:FrieseJJ,
pubmed-author:DíazJJ,
pubmed-author:PéretRR,
pubmed-author:SánchezMM,
pubmed-author:LehnertJJ,
pubmed-author:GarzónJ AJA,
pubmed-author:NovotnyJJ,
pubmed-author:PospísilVV,
pubmed-author:ChristTT,
pubmed-author:SwiftJ AJA,
pubmed-author:SapienzaPP,
pubmed-author:SchönWW,
pubmed-author:FabbiettiLL,
pubmed-author:TraxlerMM,
pubmed-author:SchwanII,
pubmed-author:CosentinoLL,
pubmed-author:EberlTT,
pubmed-author:EnghardtWW,
pubmed-author:ToiaAA,
pubmed-author:DuránII,
pubmed-author:MünchMM,
pubmed-author:IoriII,
pubmed-author:RantyBB,
pubmed-author:RustamovAA,
pubmed-author:FinocchiaroPP,
pubmed-author:KuglerAA,
pubmed-author:BöhmerMM,
pubmed-author:KoenigII,
pubmed-author:FuentesBB,
pubmed-author:MarkertJJ,
pubmed-author:SadovskyAA,
pubmed-author:KörnerH JHJ,
pubmed-author:BelliaGG,
pubmed-author:FröhlichII,
pubmed-author:KottiVV,
pubmed-author:PietraszkoJJ,
pubmed-author:GilardiCC,
pubmed-author:KienlePP,
pubmed-author:KämpferBB,
pubmed-author:KanakiKK,
pubmed-author:KulessaRR,
pubmed-author:TlustyPP,
pubmed-author:KolbB WBW,
pubmed-author:KrückenRR,
pubmed-author:StröbeleHH,
pubmed-author:MetagVV,
pubmed-author:HolzmannRR,
pubmed-author:StrothJJ,
pubmed-author:ConiglioneRR,
pubmed-author:AgodiCC,
pubmed-author:MaiolinoCC,
pubmed-author:PiattelliPP,
pubmed-author:MagestroDD,
pubmed-author:RitmanJJ,
pubmed-author:SalaburaPP,
pubmed-author:AgakichievGG,
pubmed-author:Braun-MunzingerPP,
pubmed-author:GarabatosCC,
pubmed-author:TsertosHH,
pubmed-author:P?osko?MM,
pubmed-author:ProkopowiczWW,
pubmed-author:Walu?WW,
pubmed-author:DohrmannFF,
pubmed-author:TaranenkoAA,
pubmed-author:SmolyankinVV,
pubmed-author:Alvarez-PolHH,
pubmed-author:GernhäuserRR,
pubmed-author:BielcikJJ
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