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Measurement of J/ψ polarization in pp collisions at √s=7 TeV
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LHCb Collaboration (Including: Back, J. J., Craik, Daniel, Dossett, D., Gershon, T. J., Kreps, Michal, Latham, Thomas, Pilar, T., Poluektov, Anton, Reid, Matthew M., Silva Coutinho, R., Wallace, Charlotte, Whitehead, M. (Mark) and Williams, M. P.). (2013) Measurement of J/ψ polarization in pp collisions at √s=7 TeV. The European Physical Journal C, Volume 73 (Number 11). Article number 2631. doi:10.1140/epjc/s10052-013-2631-3 ISSN 1434-6044.
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Official URL: http://dx.doi.org/10.1140/epjc/s10052-013-2631-3
Abstract
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, pT, and rapidity, y, of the J/ψ meson, in the kinematic region 2<pT<15GeV/c and 2.0<y<4.5.
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