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Back-to-Back Isolated Photon-Quarkonium Production at the LHC and the Transverse-Momentum-Dependent Distributions of the Gluons in the Proton

Abstract : The study of a quasi back-to-back isolated pair made of a heavy quarkonium, such as a J/psi or a Upsilon, and a photon produced in proton-proton collisions at the LHC, is probably the optimal way to get right away a first experimental determination of two gluon transverse-momentum-dependent distributions (TMDs) in an unpolarized proton, f1^g and h1^perp,g the latter giving the distribution of linearly polarized gluons. To substantiate this, we calculate the transverse-momentum-dependent effects that arise in the process under study and discuss the feasibility of their measurements.
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Submitted on : Wednesday, May 27, 2015 - 5:16:53 PM
Last modification on : Wednesday, September 16, 2020 - 4:08:49 PM

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J. P. Lansberg. Back-to-Back Isolated Photon-Quarkonium Production at the LHC and the Transverse-Momentum-Dependent Distributions of the Gluons in the Proton. 21st International Symposium on Spin Physics (SPIN2014), Oct 2014, Pekin, China. pp.1660015, ⟨10.1142/S2010194516600156⟩. ⟨in2p3-01157181⟩

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