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Nonperturbative QCD effects in forward scattering at the LHC

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Nonperturbative QCD effects in forward scattering at the LHC

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Título Nonperturbative QCD effects in forward scattering at the LHC
Autor Bahia, Carlos Andre da Silva
Rocha, Mateus Broilo da
Luna, Emerson Gustavo de Souza
Abstract We study infrared contributions to semihard parton-parton interactions by considering an effective charge whose finite infrared behavior is constrained by a dynamical mass scale. Using an eikonal QCDbased model in order to connect this semihard parton-level dynamics to the hadron-hadron scattering, we obtain predictions for the proton-proton (pp) and antiproton-proton ( ¯pp) total cross sections, σpp; ¯pp tot , and the ratios of the real to imaginary part of the forward scattering amplitude, ρpp; ¯pp. We discuss the theoretical aspects of this formalism and consider the phenomenological implications of a class of energydependent form factors in the high-energy behavior of the forward amplitude. We introduce integral dispersion relations specially tailored to relate the real and imaginary parts of eikonals with energydependent form factors. Our results, obtained using a group of updated sets of parton distribution functions, are consistent with the recent data from the TOTEM, AUGER, and Telescope Array experiments.
Contido em Physical review. D, Particles, fields, gravitation, and cosmology. Ridge, NY. Vol. 92, no. 7 (Oct. 2015), 074039, 13 p.
Assunto Cromodinamica quantica
Modelo de partons
Relações de dispersão
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/131389
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