Proton structure functions over the entire kinematical region

Петрухин, А. А.; Timashkov, D. A.

doi:10.1134/1.1842302

Cited by 8 publications

(12 citation statements)

References 16 publications

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“…[20]) uses the ALLM model [21], while BM and KLS both consider the CKMT model [22] at low Q 2 matched at high Q 2 to perturbative QCD predictions based on different parameterizations of parton distribution functions, and PT uses the proton structure function of Ref. [23]. The F p 2 structure function is shown in Figs.…”

Section: The Photonuclear Tau Energy Lossmentioning

confidence: 99%

Charged current neutrino cross section and tau energy loss at ultrahigh energies

et al. 2008

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We evaluate both the tau lepton energy loss produced by photonuclear interactions and the neutrino charged current cross section at ultra-high energies, relevant to neutrino bounds with Earth-skimming tau neutrinos, using different theoretical and phenomenological models for nucleon and nucleus structure functions. The theoretical uncertainty is estimated by taking different extrapolations of the structure function F 2 to very low values of x, in the low and moderate Q 2 range for the tau lepton interaction and at high Q 2 for the neutrino-nucleus inelastic cross section. It is at these extremely low values of x where nuclear shadowing and parton saturation effects are unknown and could be stronger than usually considered. For tau and neutrino energies E = 10 9GeV we find uncertainties of a factor 4 for the tau energy loss and of a factor 2 for the charged current neutrino-nucleus cross section.

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Section: The Photonuclear Tau Energy Lossmentioning

confidence: 99%

Charged current neutrino cross section and tau energy loss at ultrahigh energies

et al. 2008

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“…Other widely used results are obtained on basis of parameterisations of data using Regge theory [17,18]. A recent comparative study shows that all these calculations give rates of photonuclear energy loss in good agreement [19], except for [20] which results in a significantly higher rate at energies above 10 8 GeV. A new calculation based on saturation physics [21] is also presented in [19].…”

Section: A the Processesmentioning

confidence: 99%

Tau energy losses at ultrahigh energy: Continuous versus stochastic treatment

et al. 2008

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We study the energy losses of the tau lepton in matter through electromagnetic processes at ultra-high energy (UHE). We use both a stochastic and a continuous framework to treat these interactions and compare the flux of tau leptons propagated after some amount of matter. We discuss the accuracy of the approximation of continuous energy losses by studying the propagation in standard rock of taus with both mono-energetic and power law injection spectra.

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“…The dominant source of τ energy losses at E τ > 6 EeV comes from the photonuclear interactions, whose description relies on the proper modelisation of the nucleon structure functions at low x and high Q 2 . Several calculations of the corresponding cross section, based on different theoretical models, can be found in the literature [9][10][11][12]. All of them give comparable results except for [11] which gives a significantly higher loss rate, and for [12] which gives a rate more than a factor of 2 lower than the standard one at the highest energies (∼ 10 12 GeV).…”

Section: ν τ and τ Propagation: Gen-eral Transport Equationsmentioning

confidence: 85%

The propagation of ultra-high energy tau leptons and neutrinos while skimming the Earth

Blanch-Bigas¹,

Deligny²,

Payet³

et al. 2009

Nuclear Physics B - Proceedings Supplements

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6 pages, 6 figures. Proceedings of CRIS 2008 - Cosmic Ray International Seminar, Malfa Island, Italy, September 15-19, 2008International audienceThe detection of Earth-skimming tau neutrinos has turned into a very promising strategy for the observation of UHE cosmic neutrinos. The sensitivity of this channel crucially depends on the parameters of the propagation of the tau neutrino (and the tau lepton) through the terrestrial crust, which governs the flux of emerging tau leptons that can be detected. This propagation problem is usually treated in a simplified framework where several effects are neglected, e.g. the possibility of multiple regenerations of the tau neutrino, the weak interactions of the tau lepton, as well as the stochastic nature of its energy losses. We discuss here the validity of such approximations by studying the propagation in standard rock of tau leptons and neutrinos with both mono-energetic and power-law spectra. We also investigate the impact of such simplifications in non-standard scenarios for the neutrino-nucleon interactions as well as for the tau energy losses

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Proton structure functions over the entire kinematical region

Cited by 8 publications

References 16 publications

Charged current neutrino cross section and tau energy loss at ultrahigh energies

Charged current neutrino cross section and tau energy loss at ultrahigh energies

Tau energy losses at ultrahigh energy: Continuous versus stochastic treatment

The propagation of ultra-high energy tau leptons and neutrinos while skimming the Earth

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