Prompt leptons in cosmic rays

Bugaev, É. V.; Naumov, Vadim A.; Sinegovsky, S. I.; Zaslavskaya, E.S.

doi:10.1007/bf02509070

Cited by 84 publications

(130 citation statements)

References 27 publications

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“…The model rejection factor for the intrinsic charm model by Bugaev et al [12] is 0.5. This means that even a flux as low as 50% of the Bugaev et al prediction is excluded by this analysis with 90% C.L.…”

Section: Limits On Prompt Atmospheric Neutrino Fluxesmentioning

confidence: 95%

“…Those limits are a factor of seven less constraining than the limits set by the analysis presented here. Model MRF ERS08 þ H3a [13,15] 3.8 ERS08 [13] 4.8 ERS08 (max) [13] 3.8 ERS08 (min) [13] 8.2 MRS03 (GBW) [11] 9.9 MRS03 (MRST) [11] 8.0 MRS03 (KMS) [11] 8.3 BNSZ89 (RQPM) [12] 0.5 BNSZ89 (QGSM) [12] 1.8 Table VI). The baseline model used here is the model ERS08 modified with the cosmic-ray parametrization by Gaisser et al and is represented by the thick orange line.…”

Section: Limits On Prompt Atmospheric Neutrino Fluxesmentioning

confidence: 99%

“…In addition to the limit on the baseline flux ERS08þ H3a, upper limits are also calculated for other prompt neutrino flux predictions [11][12][13]. The results for the different models are given in Table VI and are shown in Fig.…”

Section: Limits On Prompt Atmospheric Neutrino Fluxesmentioning

confidence: 99%

“…The cross sections for their production are small and therefore their contribution is only relevant at higher energies, where the conventional component is suppressed below this level [11][12][13]. These heavy mesons have such short lifetimes that they immediately decay, rather than interact, which causes prompt neutrinos to follow the energy spectrum of the parent cosmic rays.…”

Section: Introductionmentioning

confidence: 99%

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Search for a diffuse flux of astrophysical muon neutrinos with the IceCube 59-string configuration

Aartsen¹,

Abbasi²,

Ackermann³

et al. 2014

Phys. Rev. D

102

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when the array was running in its 59-string configuration. The data sample was optimized to contain muon neutrino induced events with a background contamination of atmospheric muons of less than 1%. These data, which are dominated by atmospheric neutrinos, are analyzed with a global likelihood fit to search for possible contributions of prompt atmospheric and astrophysical neutrinos, neither of which have yet been identified. Such signals are expected to follow a harder energy spectrum than conventional atmospheric neutrinos. In addition, the zenith angle distribution differs for astrophysical and atmospheric signals. A global fit of the reconstructed energies and directions of observed events is performed, including possible neutrino flux contributions for an astrophysical signal and atmospheric backgrounds as well as systematic uncertainties of the experiment and theoretical predictions. The best fit yields an astrophysical signal flux for ν μ þν μ of E 2 · ΦðEÞ ¼ 0.25 × 10 −8 GeV cm −2 s −1 sr −1 ,

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Section: Limits On Prompt Atmospheric Neutrino Fluxesmentioning

confidence: 95%

Section: Limits On Prompt Atmospheric Neutrino Fluxesmentioning

confidence: 99%

Section: Limits On Prompt Atmospheric Neutrino Fluxesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Search for a diffuse flux of astrophysical muon neutrinos with the IceCube 59-string configuration

Aartsen¹,

Abbasi²,

Ackermann³

et al. 2014

Phys. Rev. D

102

View full text Add to dashboard Cite

show abstract

“…The same is for the sea-like IC model: x c+c = 0.024. For applications in cosmic ray physics (in particular, for calculations of atmospheric spectra of leptons (see, e.g., [23,24])) we need the dependence of dN/dx F on x F , so, we integrate (6) on p ⊥ and change the variables, using the relation…”

Section: Resultsmentioning

confidence: 99%

About possible contribution of intrinsic charm component to inclusive spectra of charmed mesons

Bugaev¹,

Klimai²

2010

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

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Abstract. We calculate differential energy spectra (x F -distributions) of charmed particles produced in proton-nucleus collisions, assuming the existence of intrinsic heavy quark components in the proton wave function. For the calculation, the recently proposed factorization scheme is used, based on the Color Glass Condensate theory and specially suited for predictions of a production of particles with large rapidities. It is argued that the intrinsic charm component can, if it exists, dominate in a sum of two components, intrinsic + extrinsic, of the inclusive spectrum of charmed particles produced in proton-nucleus collisions at high energies, in the region of medium x F , 0.15 < x F < 0.7, and can give noticeable contribution to atmospheric fluxes of prompt muons and neutrinos.

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The Muon Puzzle in cosmic-ray induced air showers and its connection to the Large Hadron Collider

Albrecht

Cazón

Dembinski

et al. 2022

Astrophys Space Sci

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High-energy cosmic rays are observed indirectly by detecting the extensive air showers initiated in Earth’s atmosphere. The interpretation of these observations relies on accurate models of air shower physics, which is a challenge and an opportunity to test QCD under extreme conditions. Air showers are hadronic cascades, which give rise to a muon component through hadron decays. The muon number is a key observable to infer the mass composition of cosmic rays. Air shower simulations with state-of-the-art QCD models show a significant muon deficit with respect to measurements; this is called the Muon Puzzle. By eliminating other possibilities, we conclude that the most plausible cause for the muon discrepancy is a deviation in the composition of secondary particles produced in high-energy hadronic interactions from current model predictions. The muon discrepancy starts at the TeV scale, which suggests that this deviation is observable at the Large Hadron Collider. An enhancement of strangeness production has been observed at the LHC in high-density events, which can potentially explain the puzzle, but the impact of the effect on forward produced hadrons needs further study, in particular with future data from oxygen beam collisions.

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Prompt leptons in cosmic rays

Cited by 84 publications

References 27 publications

Search for a diffuse flux of astrophysical muon neutrinos with the IceCube 59-string configuration

Search for a diffuse flux of astrophysical muon neutrinos with the IceCube 59-string configuration

About possible contribution of intrinsic charm component to inclusive spectra of charmed mesons

The Muon Puzzle in cosmic-ray induced air showers and its connection to the Large Hadron Collider

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