Search for intrinsic charm in vector boson production accompanied by heavy-flavor jets

Beauchemin, P. H.; Bednyakov, V. A.; Lykasov, G. I.; Stepanenko, Yu. Yu.

doi:10.1103/physrevd.92.034014

Cited by 29 publications

(59 citation statements)

References 38 publications

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“…Also in Refs. [44,45] searches for intrinsic charm component of the proton at the LHC are presented. In this case, having a code which can extract the intrinsic heavy densities for any arbitrary intrinsic quark probability would be valuable.…”

Section: Introductionmentioning

confidence: 99%

The impact of the intrinsic charm quark content of a proton on the differential $\gamma +c$ cross section

Rostami¹,

Khorramian²,

Aleedaneshvar³

et al. 2016

J. Phys. G: Nucl. Part. Phys.

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We present a comparative analysis of the impact of the non-perturbative intrinsic charm quark content of the proton on differential cross section of γ + c-jet in pp and pp collisions, for the kinematic regions that are sensitive to this contribution. We discuss the Q 2 evolution of intrinsic quark distributions at the next-to-leading order (NLO) and present a code which provide these distributions as a function of x and Q 2 for any arbitrary Fock state probability. For the pp collisions at the Tevatron, the results are compared with the recent experimental data of D0 at √ s = 1.96 TeV and also predictions for pp collisions at √ s = 8 TeV and √ s = 13 TeV for the LHC.

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Section: Introductionmentioning

confidence: 99%

The impact of the intrinsic charm quark content of a proton on the differential $\gamma +c$ cross section

Rostami¹,

Khorramian²,

Aleedaneshvar³

et al. 2016

J. Phys. G: Nucl. Part. Phys.

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“…Theoretical approaches to the associated γ(Z) + Q production As was mentioned above, we perform the numerical calculations of the associated γ(Z) + Q production cross sections using the parton-level Monte Carlo event generator MCFM within the NLO pQCD as well as the k T -factorization QCD approach. The MCFM is able to calculate the processes, that involve the gauge bosons Z or W (see [13,14] for more information). In contrast to our early study of these processes [14] within the MCFM, we use this generator to calculate the differential and total cross sections of the Z + c and Z + b production in the pp collision and their ratio as a function w [12].…”

Section: Intrinsic Charm Density In a Proton As A Function Of Ic Probmentioning

confidence: 99%

“…The MCFM is able to calculate the processes, that involve the gauge bosons Z or W (see [13,14] for more information). In contrast to our early study of these processes [14] within the MCFM, we use this generator to calculate the differential and total cross sections of the Z + c and Z + b production in the pp collision and their ratio as a function w [12].…”

Section: Intrinsic Charm Density In a Proton As A Function Of Ic Probmentioning

confidence: 99%

Collider test of proton intrinsic charm in γ ( Z )+ c ( b ) production by pp collisions

Lykasov

Lipatov

Stepanenko³

2017

Proceedings of XXV International Workshop on Deep-Inelastic Scattering and Related Subjects — PoS(DIS2017)

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We consider an observable very sensitive to the non-zero intrinsic charm (IC) contribution to the proton density. It is the ratio between the differential cross sections of the photon or Z-boson and c-jet production in the pp collision, γ(Z) + c, and the γ(Z) and the b-jet production. It is shown that this ratio can be approximately flat or increasing at large γ(Z) transverse momenta p T and their pseudo-rapidities 1.5 < η < 2.4 if the IC contribution is taken into account. On the contrary, in the absence of the IC this ratio decreases as p T grows. We also present the ratios of the cross sections integrated over p T as a function of the IC probability w. It is shown that these ratios are mostly independent on the theoretical uncertainties, and such predictions could therefore be much more promising for the search for the intrinsic charm signal at the LHC compared to the predictions on p T -spectrta of photons or Z-bosons.

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“…Moreover, some analyses have been done to extract the probabilities of the light intrinsic quarks [6,34] using the existingd −ū data from the Fermilab E866 Drell-Yan experiment [35] and s +s data from the HERMES Collaboration measurement of charged kaon production in the semi-inclusive deep inelastic scattering (SIDIS) reaction [36]. There have also been some studies about the impact of the intrinsic charm quark on processes such as direct photon [37] and Z boson [38] production in association with a heavy quark or intrinsic bottom quark on heavy new physics [39] at the present hadron colliders such as LHC.…”

Section: Introductionmentioning

confidence: 99%

Intrinsic strange distributions in the nucleon from the light-cone models

Salajegheh

2015

Phys. Rev. D

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Precise knowledge of the strange and antistrange quark distributions of the nucleon is a major step toward better understanding of the strong interaction and the nucleon structure. Moreover, the s −s asymmetry in the nucleon plays an important role in some physical processes involving hadrons. The goal of this paper is the study of intrinsic strange contribution to the strange sea of the nucleon. To this aim, we calculate the intrinsic strange distributions from the various light-cone models, including Brodsky, Hoyer, Peterson, and Sakai (BHPS); scalar five-quark and meson-baryon models and then compare their results. These models can lead to the rather different distributions for the intrinsic strange that are dominated in different values of x. Furthermore, the meson-baryon model leads to the s−s asymmetry that can be comparable in some situations to the result obtained from the global analysis of PDFs. We also present a simple parametrization for each model prediction of intrinsic strange distribution.

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Search for intrinsic charm in vector boson production accompanied by heavy-flavor jets

Cited by 29 publications

References 38 publications

The impact of the intrinsic charm quark content of a proton on the differential $\gamma +c$ cross section

The impact of the intrinsic charm quark content of a proton on the differential $\gamma +c$ cross section

Collider test of proton intrinsic charm in γ ( Z )+ c ( b ) production by pp collisions

Intrinsic strange distributions in the nucleon from the light-cone models

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