Measurement of ϒ production in pp collisions at √s = 2.76 TeV


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Aaij R., Adeva B., Adinolfi M., Affolder A., Ajaltouni Z., Albrecht J., ...Daha Fazla

European Physical Journal C, cilt.74, sa.4, 2014 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 74 Sayı: 4
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1140/epjc/s10052-014-2835-1
  • Dergi Adı: European Physical Journal C
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Manisa Celal Bayar Üniversitesi Adresli: Evet

Özet

The production of ϒ(1S), ϒ(2S) and ϒ(3S) mesons decaying into the dimuon final state is studied with the LHCb detector using a data sample corresponding to an integrated luminosity of 3.3pb−1 collected in proton–proton collisions at a centre-of-mass energy of √s = 2.76 TeV. The differential production cross-sections times dimuon branching fractions are measured as functions of the ϒ transverse momentum and rapidity, over the ranges pT < 15 GeV/c and 2.0 < y < 4.5. The total cross-sections in this kinematic region, assuming unpolarised production, aremeasured to be σ (pp → ϒ(1S)X) × B (ϒ(1S) → μ+ μ) = 1.111 ± 0.043 ± 0.044 nb, σ (pp → ϒ(2S)X) × B (ϒ(2S)→μ+ μ) = 0.264 ± 0.023 ± 0.011 nb, σ (pp → ϒ(3S)X) × B (ϒ(3S) → μ+ μ) = 0.159 ± 0.020 ± 0.007 nb, where the first uncertainty is statistical and the second systematic.