Next-to-leading-order nonrelativistic QCD disfavors the interpretation of X(3872) as χc1(2P)

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Autor/in:
Erscheinungsjahr:
2013
Medientyp:
Text
Schlagworte:
  • Production
  • Collisions
  • Nonrelativistic QCD
  • Decay
  • Quarks
  • Neutrinos
  • Production
  • Collisions
  • Nonrelativistic QCD
  • Decay
  • Quarks
  • Neutrinos
Beschreibung:
  • We study χc1(2P)-inclusive hadroproduction at next-to-leading-order (NLO), both in αs and v2, within the factorization formalism of nonrelativistic quantum chromodynamics (NRQCD), including the color-singlet P1[1]3 and color-octet S1[8]3 cc̄ Fock states as well as the mixing of the latter with the D1[8]3 state. Assuming the recently discovered X(3872) hadron to be the JPC=1++ charmonium state χc1(2P), we perform a fit to the cross sections measured by the CDF, CMS, and LHCb Collaborations. We obtain either an unacceptably high value of χ2, a value of |R2P′(0)| incompatible with well-established potential models, or an intolerable violation of the NRQCD velocity rules. We thus conclude that NLO NRQCD is inconsistent with the hypothesis X(3872)≡χc1(2P). © 2013 American Physical Society.
Lizenz:
  • info:eu-repo/semantics/restrictedAccess
Quellsystem:
Forschungsinformationssystem der UHH
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oai:www.edit.fis.uni-hamburg.de:publications/087adcf6-0d7e-4f17-a127-5268bcab35be