|
rdf:type |
|
|
lifeskim:mentions |
|
|
pubmed:issue |
6992
|
|
pubmed:dateCreated |
2004-6-10
|
|
pubmed:abstractText |
The standard model of particle physics contains parameters--such as particle masses--whose origins are still unknown and which cannot be predicted, but whose values are constrained through their interactions. In particular, the masses of the top quark (M(t)) and W boson (M(W)) constrain the mass of the long-hypothesized, but thus far not observed, Higgs boson. A precise measurement of M(t) can therefore indicate where to look for the Higgs, and indeed whether the hypothesis of a standard model Higgs is consistent with experimental data. As top quarks are produced in pairs and decay in only about 10(-24) s into various final states, reconstructing their masses from their decay products is very challenging. Here we report a technique that extracts more information from each top-quark event and yields a greatly improved precision (of +/- 5.3 GeV/c2) when compared to previous measurements. When our new result is combined with our published measurement in a complementary decay mode and with the only other measurements available, the new world average for M(t) becomes 178.0 +/- 4.3 GeV/c2. As a result, the most likely Higgs mass increases from the experimentally excluded value of 96 to 117 GeV/c2, which is beyond current experimental sensitivity. The upper limit on the Higgs mass at the 95% confidence level is raised from 219 to 251 GeV/c2.
|
|
pubmed:commentsCorrections |
|
|
pubmed:language |
eng
|
|
pubmed:journal |
|
|
pubmed:status |
PubMed-not-MEDLINE
|
|
pubmed:month |
Jun
|
|
pubmed:issn |
1476-4687
|
|
pubmed:author |
pubmed-author:JohnsonMM,
pubmed-author:SmithR PRP,
pubmed-author:LundstedtCC,
pubmed-author:HansenSS,
pubmed-author:BanerjeeSS,
pubmed-author:GayGG,
pubmed-author:OshimaNN,
pubmed-author:WillisSS,
pubmed-author:ShinM SMS,
pubmed-author:NagyEE,
pubmed-author:WhiteAA,
pubmed-author:GómezBB,
pubmed-author:BhattacharjeeMM,
pubmed-author:StraussMM,
pubmed-author:GutierrezGG,
pubmed-author:YasudaTT,
pubmed-author:YuJJ,
pubmed-author:BuehlerMM,
pubmed-author:FREDE BEB,
pubmed-author:EvansHH,
pubmed-author:MooreR WRW,
pubmed-author:YamadaRR,
pubmed-author:GrinsteinSS,
pubmed-author:SawyerLL,
pubmed-author:SnyderSS,
pubmed-author:FortneyJJ,
pubmed-author:BernardiGG,
pubmed-author:LeeW MWM,
pubmed-author:ShawM WMW,
pubmed-author:CaseyDD,
pubmed-author:FoxHH,
pubmed-author:SolomonJJ,
pubmed-author:JainSS,
pubmed-author:ZielinskiMM,
pubmed-author:BotJJ,
pubmed-author:EllisonJJ,
pubmed-author:SantoroAA,
pubmed-author:FULDMM,
pubmed-author:BhatnagarVV,
pubmed-author:JohnyMM,
pubmed-author:HanCC,
pubmed-author:MarshallTT,
pubmed-author:McMahonTT,
pubmed-author:SteinbrückGG,
pubmed-author:LiptonRR,
pubmed-author:BarberisEE,
pubmed-author:BessonAA,
pubmed-author:AdamsMM,
pubmed-author:StokesEE,
pubmed-author:OOIS KSK,
pubmed-author:ConnollyBB,
pubmed-author:KuznetsovV EVE,
pubmed-author:VolkovA AAA,
pubmed-author:DavisG AGA,
pubmed-author:SnowJJ,
pubmed-author:TaylorWW,
pubmed-author:HuangYY,
pubmed-author:AvilaCC,
pubmed-author:AbbottBB,
pubmed-author:ClarkA RAR,
pubmed-author:StoneAA,
pubmed-author:HuangJJ,
pubmed-author:AdamsD LDL,
pubmed-author:PartridgeRR,
pubmed-author:CuttsDD,
pubmed-author:HallR ERE,
pubmed-author:KahnSS,
pubmed-author:DesaiSS,
pubmed-author:ButlerJ MJM,
pubmed-author:OguraNN,
pubmed-author:NealH AHA,
pubmed-author:BorsEE,
pubmed-author:IllingworthRR,
pubmed-author:ChakrabortyDD,
pubmed-author:KehoeRR,
pubmed-author:WomersleyJJ,
pubmed-author:RajagopalanSS,
pubmed-author:BrockRR,
pubmed-author:WattsGG,
pubmed-author:BegerWW,
pubmed-author:ArnouxMM,
pubmed-author:BauerDD,
pubmed-author:WoodD RDR,
pubmed-author:LandsbergGG,
pubmed-author:KothariBB,
pubmed-author:ChopraSS
|
