Heavy quark production at LHC in the color dipole formalism

Cazaroto, E. R.; Gonçalves, V. P.; Navarra, F. S.

doi:10.1016/j.nuclphysa.2011.09.017

Cited by 16 publications

(23 citation statements)

References 73 publications

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“…In particular, in Ref. [15] we have analyzed the mass and factorization scale dependence of the heavy quark cross sections in the color dipole approach and demonstrated that our predictions at LHC energies were strongly dependent on the choice of these parameters. On the other hand, in Ref.…”

Section: Resultsmentioning

confidence: 92%

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Heavy quark production in ultra high energy cosmic ray interactions

Gonçalves

Gratieri

2015

Astroparticle Physics

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a b s t r a c tIn this paper we present a comprehensive study of the heavy quark production in ultra high energy cosmic ray interactions in the atmosphere considering that the primary cosmic ray can be either a photon, neutrino or a proton. The analysis is performed using a unified framework -the dipole formalism -and the saturation effects, associated to the physical process of parton recombination, are taken into account. We demonstrate that the contribution of heavy quarks for cosmic ray interactions is in general non-negligible and can be dominant depending of the process considered. Moreover, our results indicate that new dynamical mechanisms should be included in order to obtain reliable predictions for the heavy quark production in pp collisions at ultra high cosmic ray energies.

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Section: Resultsmentioning

confidence: 92%

“…In Refs. [15,16] this approach has been discussed in detail and the heavy quark cross sections at collider energies were estimated. In particular, in Ref.…”

Section: Resultsmentioning

confidence: 99%

Heavy quark production in ultra high energy cosmic ray interactions

Gonçalves

Gratieri

2015

Astroparticle Physics

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“…The production of heavy states at high energies is expected to be sensitive to non -linear effects of QCD dynamics [27][28][29][30][31][32], which are predicted to be enhanced at forward rapidites [33]. The cross sections at forward rapidities are dominated by collisions of projectile partons with large light cone momentum fractions (x p → 1) with target partons carrying a very small momentum fraction (x t ≪ 1).…”

Section: Introductionmentioning

confidence: 99%

Intrinsic charm contribution to the prompt atmospheric neutrino flux

2018

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In this work we investigate the impact of intrinsic charm on the prompt atmospheric neutrino flux. The color dipole approach to heavy quark production is generalized to include the contribution of processes initiated by charm quarks. The prompt neutrino flux is calculated assuming the presence of intrinsic charm in the wave function of the projetile hadron. The predictions are compared with previous color dipole results which were obtained taking into account only the process initiated by gluons. In addition, we estimate the atmospheric (conventional + prompt) neutrino flux and compare our predictions with the ICECUBE results for the astrophysical neutrino flux. Our results demonstrate that the contribution of the charm quark initiated process is non -negligible and that the prompt neutrino flux can be enhanced by a factor ≈ 2 at large neutrino energies if an intrinsic charm component is present in the proton wave function.

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“…Charmed and bottom hadrons are formed from the hadronization of these heavy quarks with sea quarks, in a mechanism called Uncorrelated Fragmentation. More information of the model in [7] and [8].…”

Section: Color Glass Condensatementioning

confidence: 99%

Longitudinal profiles of Extensive Air Showers with inclusion of charm and bottom particles

Müller

Gonçalves

2019

Int. J. Mod. Phys. A

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Charm and bottom particles are rare in Extensive Air Showers but the effect of its presence can be radical in the development of the Extensive Air Showers (EAS). If such particles arise with a large fraction of the primary energy, they can reach large atmospheric depths, depositing its energy in deeper layers of the atmosphere. As a consequence, the EAS observables (X max , RM S and N max ) will be modified, as well as the shape of the longitudinal profile of the energy deposited in the atmosphere. In this paper, we will modify the CORSIKA Monte Carlo by the inclusion of charm and bottom production in the first interaction of the primary cosmic ray. Results for different selections of the typical x F values of the heavy particles and distinct production models will be presented.

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Heavy quark production at LHC in the color dipole formalism

Cited by 16 publications

References 73 publications

Heavy quark production in ultra high energy cosmic ray interactions

Heavy quark production in ultra high energy cosmic ray interactions

Intrinsic charm contribution to the prompt atmospheric neutrino flux

Longitudinal profiles of Extensive Air Showers with inclusion of charm and bottom particles

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