Nuclear dependence of charm production

Blanco-Covarrubias, A.; Akgun, U.; Alkhazov, G.; Amaro-Reyes, J.; Atamantchouk, A. G.; Ayan, A.S.; Balatz, M.Y.; Bondar, N.; Cooper, P. S.; Dauwe, L. J.; Davidenko, G.V.; Dersch, U.; Dolgolenko, A.; Dzyubenko, G.B.; Edelstein, R. M.; Emediato, L.; Endler, A. M. F.; Eschrich, I.; Escobar, C.; Estrada, N.; Evdokimov, A.; Филимонов, И. С.; Flores-Castillo, A.; García, F.; Golovtsov, V.; Gouffon, P.; Gülmez, E.; Iori, M.; Jun, S. Y.; Kaya, M.; Kilmer, J.; Kim, V. T.; Kochenda, L.; Konorov, I.; Кожевников, А. П.; Krivshich, A.; Krüger, H.; Kubantsev, M.; Kubarovsky, V.; Kulyavtsev, A. I.; Kuropatkin, N.P.; Kurshetsov, V. F.; Kushnirenko, A.; Lach, J.; Landsberg, L.G.; Larin, I.; Leikin, E.M.; Lopez-Hinojosa, G.; Lungov, T.; Maleev, V. P.; Mao, Dan; Mathew, P.; Mattson, M. E.; Matveev, V.; McCliment, E.; Moinester, M. A.; Molchanov, V. V.; Morelos, A.; Nemitkin, A.V.; Neoustroev, P. V.; Newsom, C. R.; Nilov, A. P.; Nurushev, S. B.; Ocherashvili, A.; Onel, Y.; Özkorucuklu, S.; Penzo, A.; Petrenko, S. V.; Procario, M.; Prutskoi, V. A.; Razmyslovich, B. V.; Ruď, V. I.; Russ, J.; Sánchez-López, J.L.; Simon, J.; Ситников, А. И.; Smith, V. J.; Srivastava, M. K.; Steiner, V.; Stepanov, V. V.; Stutte, L.; Svoiski, M.; Terentyev, N.; Torres, I.; Uvarov, L.; Vasiliev, A. N.; Vavilov, D. V.; Vázquez‐Jáuregui, E.; Verebryusov, V.S.; Victorov, V.A.; Vishnyakov, V.E.; Vorobyov, A. A.; Vorwalter, K.; You, J. M.; Funchal, R. Zukanovich

doi:10.1140/epjc/s10052-009-1174-0

Cited by 8 publications

(6 citation statements)

References 35 publications

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“…The average atomic number of the target air nuclei is A = 14.5. Measurements of charm production on a variety of targets [46,47] show that σ(pA → ccX) Aσ(pN → ccX). We use this approximation here.…”

Section: Expt Datamentioning

confidence: 99%

Perturbative charm production and the prompt atmospheric neutrino flux in light of RHIC and LHC

Bhattacharya

Enberg

Reno

et al. 2015

J. High Energ. Phys.

110

154

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We re-evaluate the prompt atmospheric neutrino flux, using the measured charm cross sections at RHIC and the Large Hadron Collider to constrain perturbative QCD parameters such as the factorization and renormalization scales, as well as modern parton distribution functions and recent estimates of the cosmic-ray spectra. We find that our result for the prompt neutrino flux is lower than previous perturbative QCD estimates and, consequently, alters the signal-to-background statistics of the recent IceCube measurements at high energies.

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Section: Expt Datamentioning

confidence: 99%

Perturbative charm production and the prompt atmospheric neutrino flux in light of RHIC and LHC

Bhattacharya

Enberg

Reno

et al. 2015

J. High Energ. Phys.

110

154

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“…where A = 14.5 for a nucleus of air. Here, we take γ = 1 assuming a linear superposition since, for light nuclei, the effect of nuclear shadowing is expected to be small [15,70].…”

Section: Charm Hadroproduction Cross-sectionmentioning

confidence: 99%

Lepton fluxes from atmospheric charm revisited

Garzelli¹,

Moch²,

Sigl³

2015

J. High Energ. Phys.

136

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We update predictions for lepton fluxes from the hadroproduction of charm quarks in the scattering of primary cosmic rays with the Earth's atmosphere. The calculation of charm-pair hadroproduction applies the latest results from perturbative QCD through next-to-next-to-leading order and modern parton distributions, together with estimates on various sources of uncertainties. Our predictions for the lepton fluxes turn out to be compatible, within the uncertainty band, with recent results in the literature. However, by taking into account contributions neglected in previous works, our total uncertainties are much larger. The predictions are crucial for the interpretation of results from neutrino experiments like IceCube, when disentangling signals of neutrinos of astrophysical origin from the atmospheric background.

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“…The intrinsic charm cross section scales with the mass number, A, approximately as A 0.755±0.016 , according to SELEX [114]. The energy dependence of the intrinsic charm contribution follows the inelastic cross section [115].…”

Section: Arxiv:160708240v3 [Hep-ph] 7 Dec 2017mentioning

confidence: 99%

IC at IC: IceCube can constrain the intrinsic charm of the proton

Laha

Brodsky

2016

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The discovery of extraterrestrial neutrinos in the ∼ 30 TeV -PeV energy range by IceCube provides new constraints on high energy astrophysics. An important background to the signal are the prompt neutrinos which originate from the decay of charm hadrons produced by high energy cosmic-ray particles interacting in the Earth's atmosphere. It is conventional to use the calculations of charm hadroproduction using gluon splitting g → cc alone. However, QCD predicts an additional "intrinsic" component of the heavy quark distribution which arises from diagrams where heavy quarks are multiply connected to the proton's valence quarks. We estimate the prompt neutrino spectrum due to intrinsic charm. We find that the atmospheric prompt neutrino flux from intrinsic charm is comparable to those calculated using QCD computations not including intrinsic charm, once we normalize the intrinsic charm differential cross sections to the ISR and the LEBC-MPS collaboration data. In future, IceCube will constrain the intrinsic charm content of the proton and will contribute to one of the major questions in high energy physics phenomenology.

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Nuclear dependence of charm production

Cited by 8 publications

References 35 publications

Perturbative charm production and the prompt atmospheric neutrino flux in light of RHIC and LHC

Perturbative charm production and the prompt atmospheric neutrino flux in light of RHIC and LHC

Lepton fluxes from atmospheric charm revisited

IC at IC: IceCube can constrain the intrinsic charm of the proton

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