Measurement of J/ψ polarization in pp collisions at √s=7Tev

Aaij, R; Abellan Beteta, C; Adeva, B; Adinolfi, M; Adrover, C; Affolder, A; Ajaltouni, Z; Albrecht, J; Alessio, F; Alexander, M; Ali, S; Alkhazov, G; Alvarez Cartelle, P; Alves J. 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doi:10.1140/epjc/s10052-013-2631-3

An angular analysis of the decay J/ψ→μ + μ - is performed to measure the polarization of prompt J/ψ mesons produced in pp collisions at √s=7Tev. The dataset corresponds to an integrated luminosity of 0.37 fb-1 collected with the LHCb detector. The measurement is presented as a function of transverse momentum, p T, and rapidity, y, of the J/ψ meson, in the kinematic region 2<p T<15 GeV/c and 2.0<y<4.5. © 2013 CERN for the benefit of the LHCb collaboration.

Aaij, R., Abellan Beteta, C., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., et al. (2013). Measurement of J/ψ polarization in pp collisions at √s=7Tev. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 73(11), 1-16 [10.1140/epjc/s10052-013-2631-3].