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. r., A; Amato, S; Amerio, S; Amhis, Y; Anderlini, L; Anderson, J; Andreassen, R; Appleby, R; Aquines Gutierrez, O; Archilli, F; Artamonov, A; Artuso, M; Aslanides, E; Auriemma, G; Bachmann, S; Back, J; Baesso, C; Balagura, V; Baldini, W; Barlow, R; Barschel, C; Barsuk, S; Barter, W; Bauer, T; Bay, A; Beddow, J; Bedeschi, F; Bediaga, I; Belogurov, S; Belous, K; Belyaev, I; Ben Haim, E; Benayoun, M; Bencivenni, G; Benson, S; Benton, J; Berezhnoy, A; Bernet, R; Bettler, M; van Beuzekom, M; Bien, A; Bifani, S; Bird, T; Bizzeti, A; Bjørnstad, P; Blake, T; Blanc, F; Blouw, J; Blusk, S; Bocci, V; Bondar, A; Bondar, N; Bonivento, W; Borghi, S; Borgia, A; Bowcock, T; Bowen, E; Bozzi, C; Brambach, T; van den Brand, J; Bressieux, J; Brett, D; Britsch, M; Britton, T; Brook, N; Brown, H; Burducea, I; Bursche, A; Busetto, G; 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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].