Measurement of the Y(nS) polarizations in pp collisions at √s=7 and 8 TeV

LHCb Collaboration, R. Aaij, B. Adeva, M. Adinolfi, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, A. Alfonso Albero, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, G. AndreassiM. Andreotti, J. E. Andrews, R. B. Appleby, F. Archilli, P. d’Argent, J. Arnau Romeu, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, I. Babuschkin, S. Bachmann, J. J. Back, A. Badalov, C. Baesso, S. Baker, V. Balagura, W. Baldini, A. Baranov, S. Bifani, R. Calladine, G. Chatzikonstantinidis, N. Farley, C. Lazzeroni, A. Mazurov, A. Sergi, N. K. Watson, M. P. Williams, T. Williams, K. A. Zarebski

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14 Citations (Scopus)
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Abstract

The polarization of the Y(1S), Y(2S) and Y(3S) mesons, produced in pp collisions at centre-of-mass energies s=7 and 8 TeV, is measured using data samples collected by the LHCb experiment, corresponding to integrated luminosities of 1 and 2 fb−1, respectively. The measurements are performed in three polarization frames, using Y → μμ decays in the kinematic region of the transverse momentum pT Υ < 30 GeV/c and rapidity 2.2 < yY < 4.5. No large polarization is observed.

Original languageEnglish
Article number110
JournalJournal of High Energy Physics
Volume2017
Issue number12
DOIs
Publication statusPublished - 20 Dec 2017

Keywords

  • Hadron-Hadron scattering (experiments)
  • Particle and resonance production
  • Polarization
  • QCD

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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