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Reconsideration of the inclusive prompt photon production at LHC with kt-factorization | | A.V. Lipatov
; M.A. Malyshev
; | | Date: |
8 Jun 2016 | | Abstract: | We reconsider the inclusive production of isolated prompt photons in $pp$
collisions at the LHC energies in the framework of $k_T$-factorization
approach. Our analysis is based on the ${cal O}(alpha alpha_s)$ off-shell
(depending on the transverse momenta of initial quarks and gluons) production
amplitudes of $q^* g^* o gamma q$ and $q^* ar q^* o gamma g$ partonic
subprocesses and transverse momentum dependent (or unintegrated) quark and
gluon densities in a proton, which are chosen in accordance with the
Kimber-Martin-Ryskin prescription. We show that the sub-leading high-order
${cal O}(alpha alpha_s^2)$ contributions, not covered by the non-collinear
evolution of parton densities, are important to describe latest LHC data. | | Source: | arXiv, 1606.2696 | | Services: | Forum | Review | PDF | Favorites | |
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