The recent observation of very high energy cosmic neutrinos by IceCube heralds the beginning of neutrino astronomy. At these energies, the dominant background to the astrophysical signal is the flux of ‘prompt’ neutrinos, arising from the decay of charmed mesons produced by cosmic ray collisions in the atmosphere. In this work we provide predictions for the prompt atmospheric neutrino flux in the framework of perturbative QCD, using state-of-the-art Monte Carlo event generators. Our calculation includes the constraints set by charm production measurements from the LHCb experiment at 7 TeV, recently validated with the corresponding 13 TeV data. Our result for the prompt flux is a factor of about 2 below the previous benchmark calculation, in general agreement with other recent estimates, but with an improved estimate of the uncertainty. This alleviates the existing tension between the theoretical prediction and IceCube limits, and suggests that a direct detection of the prompt flux is imminent.

Gauld, R., Rojo, J., Rottoli, L., Sarkar, S., & Talbert, J. (2016). The prompt atmospheric neutrino flux in the light of LHCb. JOURNAL OF HIGH ENERGY PHYSICS, 2016(2), 1-22 [10.1007/JHEP02(2016)130].

The prompt atmospheric neutrino flux in the light of LHCb

Rottoli, L;
2016

Abstract

The recent observation of very high energy cosmic neutrinos by IceCube heralds the beginning of neutrino astronomy. At these energies, the dominant background to the astrophysical signal is the flux of ‘prompt’ neutrinos, arising from the decay of charmed mesons produced by cosmic ray collisions in the atmosphere. In this work we provide predictions for the prompt atmospheric neutrino flux in the framework of perturbative QCD, using state-of-the-art Monte Carlo event generators. Our calculation includes the constraints set by charm production measurements from the LHCb experiment at 7 TeV, recently validated with the corresponding 13 TeV data. Our result for the prompt flux is a factor of about 2 below the previous benchmark calculation, in general agreement with other recent estimates, but with an improved estimate of the uncertainty. This alleviates the existing tension between the theoretical prediction and IceCube limits, and suggests that a direct detection of the prompt flux is imminent.
Articolo in rivista - Articolo scientifico
Scientifica
QCD; Solar and Atmospheric Neutrinos;
QCD; Solar and Atmospheric Neutrinos; Nuclear and High Energy Physics
English
Gauld, R., Rojo, J., Rottoli, L., Sarkar, S., & Talbert, J. (2016). The prompt atmospheric neutrino flux in the light of LHCb. JOURNAL OF HIGH ENERGY PHYSICS, 2016(2), 1-22 [10.1007/JHEP02(2016)130].
Gauld, R; Rojo, J; Rottoli, L; Sarkar, S; Talbert, J
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10281/229856
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