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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
12
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pubmed:dateCreated |
2001-4-6
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pubmed:abstractText |
We present a measurement of the polarization observed for bottomonium states produced in p-Cu collisions at square root of s = 38.8 GeV. The angular distribution of the decay dimuons of the Upsilon(1S) state shows no polarization at small values of the fractional longitudinal momentum x(F) and transverse momentum p(T) but significant positive transverse production polarization for either p(T)>1.8 GeV/c or for x(F)>0.35. The Upsilon(2S+3S) (unresolved) states show a large transverse production polarization at all values of x(F) and p(T) measured. These observations challenge NRQCD calculations of the polarization expected in the hadronic production of bottomonium states.
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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 |
Mar
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pubmed:issn |
0031-9007
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pubmed:author |
pubmed-author:AtriM LML,
pubmed-author:BeddoM EME,
pubmed-author:BrooksM LML,
pubmed-author:BrownC NCN,
pubmed-author:BushJ DJD,
pubmed-author:CareyT ATA,
pubmed-author:ChangT HTH,
pubmed-author:CooperW EWE,
pubmed-author:FNAL E866/NuSea Collaboration,
pubmed-author:GagliardiC ACA,
pubmed-author:GarveyG TGT,
pubmed-author:GeesamanD FDF,
pubmed-author:HawkerE AEA,
pubmed-author:HeX CXC,
pubmed-author:IsenhowerL DLD,
pubmed-author:KaplanD MDM,
pubmed-author:KaufmanS BSB,
pubmed-author:KerrL GLG,
pubmed-author:KoetkeD DDD,
pubmed-author:KyleGG,
pubmed-author:LeeD MDM,
pubmed-author:LeeW MWM,
pubmed-author:LeitchM JMJ,
pubmed-author:MOCKH EHE,
pubmed-author:MakinoJJ,
pubmed-author:McGaugheyP LPL,
pubmed-author:MossJ MJM,
pubmed-author:MuellerB ABA,
pubmed-author:NordP MPM,
pubmed-author:PapavassiliouVV,
pubmed-author:PengJ CJC,
pubmed-author:PetittGG,
pubmed-author:ReimerP EPE,
pubmed-author:SadlerM EME,
pubmed-author:SondheimW EWE,
pubmed-author:StankusP WPW,
pubmed-author:ThompsonT NTN,
pubmed-author:TowellR SRS,
pubmed-author:TribbleR ERE,
pubmed-author:VasilievM AMA,
pubmed-author:WebbJ CJC,
pubmed-author:WillisJ LJL,
pubmed-author:WiseD KDK,
pubmed-author:YoungG RGR
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pubmed:issnType |
Print
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pubmed:day |
19
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pubmed:volume |
86
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
2529-32
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pubmed:dateRevised |
2003-10-31
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pubmed:year |
2001
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pubmed:articleTitle |
Observation of polarization in bottomonium production at square root of s = 38.8 GeV.
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pubmed:affiliation |
Fermi National Laboratory, Argonne, IL 60439, USA.
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pubmed:publicationType |
Journal Article
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