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Measurement of the inclusive J/ψ polarization at forward rapidity in pp collisions at s√=8 TeV

arXiv. org e-print Archiv (Hrsg). Genf, Schweiz. 2018 S. 1 - 20

Erscheinungsjahr: 2018

Publikationstyp: Diverses (Forschungsbericht)

Sprache: Englisch

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Inhaltszusammenfassung


We report on the measurement of the inclusive J/ψ polarization parameters in pp collisions at a center of mass energy s√=8 TeV with the ALICE detector at the LHC. The analysis is based on a data sample corresponding to an integrated luminosity of 1.23 pb−1. J/ψ resonances are reconstructed in their di-muon decay channel in the rapidity interval 2.5<y<4.0 and over the transverse-momentum interval 2<pT<15 GeV/c. The three polarization parameters (λθ, λφ, λθφ) are measured as a function of pT bo...We report on the measurement of the inclusive J/ψ polarization parameters in pp collisions at a center of mass energy s√=8 TeV with the ALICE detector at the LHC. The analysis is based on a data sample corresponding to an integrated luminosity of 1.23 pb−1. J/ψ resonances are reconstructed in their di-muon decay channel in the rapidity interval 2.5<y<4.0 and over the transverse-momentum interval 2<pT<15 GeV/c. The three polarization parameters (λθ, λφ, λθφ) are measured as a function of pT both in the helicity and Collins-Soper reference frames. The measured J/ψ polarization parameters are found to be compatible with zero within uncertainties, contrary to expectations from all available predictions. The results are compared with the measurement in pp collisions at s√=7 TeV. » weiterlesen» einklappen

  • J/ψ polarization parameter
  • pp collision
  • mass energy
  • polarization parameters

Autoren


Acharya, S. (Autor)
Acosta, F. T. (Autor)
Adamova, D. (Autor)

Klassifikation


DDC Sachgruppe:
Physik

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