Forward charm-production models and prompt neutrinos at IceCube

Bhattacharya, Atri; Cudell, Jean-René

doi:10.1007/jhep11(2018)150

Cited by 8 publications

(9 citation statements)

References 46 publications

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“…These FPF measurements will then be related to improved theoretical predictions of prompt atmospheric neutrino fluxes [6]. Likewise, measurements of the prompt atmospheric neutrino flux may lead to a better understanding of structure of the proton through the parton distribution functions and, for example, the role of intrinsic charm [532][533][534][535].…”

Section: Prompt Neutrinosmentioning

confidence: 99%

High-Energy and Ultra-High-Energy Neutrinos

Ackermann,

Agarwalla,

Alvarez-Muñiz

et al. 2022

Preprint

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Astrophysical neutrinos are excellent probes of astroparticle physics and high-energy physics. With energies far beyond solar, supernovae, atmospheric, and accelerator neutrinos, high-energy and ultrahigh-energy neutrinos probe fundamental physics from the TeV scale to the EeV scale and beyond. They are sensitive to physics both within and beyond the Standard Model through their production mechanisms and in their propagation over cosmological distances. They carry unique information about their extreme non-thermal sources by giving insight into regions that are opaque to electromagnetic radiation. This white paper describes the opportunities astrophysical neutrino observations offer for astrophysics and high-energy physics, today and in coming years.Fully opening the HE and UHE neutrino windows requires a multi-pronged approach that explores a broad range of proposed experimental techniques. With upcoming neutrino telescopes, the goal is to improve the sensitivity ten-fold in the HE range and hundred-fold in the UHE range. In the HE range, we are moving into the high-statistics era, where subtle features may be resolved and multiple sources may be discovered. In the UHE range, neutrino flux predictions and physics tests are well-motivated, but we will likely need new techniques to enable discoveries. The ongoing efforts to develop new instruments will improve sensitivity, increase statistics, and expand the energy range. A broad range of experimental approaches, with complementary capabilities, must be developed and tested in the coming decades. Because it is not clear which techniques will prevail, we advocate for a broad portfolio of experiments in the HE and UHE neutrino sector. Owing to their potential, HE and UHE neutrinos should be at the forefront of the high-energy physics program, as they push the boundaries for the neutrino, cosmic, energy, theory, and instrumentation frontiers. 4 Experimental landscape 32 4.1 Overview 32 4.2 High-energy range 35 4.3 Ultra-High Energy Range (> 100-PeV) 45

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Section: Prompt Neutrinosmentioning

confidence: 99%

High-Energy and Ultra-High-Energy Neutrinos

Ackermann,

Agarwalla,

Alvarez-Muñiz

et al. 2022

Preprint

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“…Models of enhanced charm production (see, e.g., refs. [8][9][10]) including intrinsic charm [11][12][13][14][15][16][17][18][19] have been explored in the context of the high energy atmospheric neutrino flux [20][21][22][23][24]. Using the model of intrinsic charm described in refs.…”

Section: Introductionmentioning

confidence: 99%

Prompt neutrinos and intrinsic charm at SHiP

Bai

Reno

2019

J. High Energ. Phys.

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We present a new evaluation of the far-forward neutrino plus antineutrino flux and number of events from charm hadron decays in a 400 GeV proton beam dump experiment like the Search for Hidden Particles (SHiP). Using next-to-leading order perturbative QCD and a model for intrinsic charm, we include intrinsic transverse momentum effects and other kinematic angular corrections. We compare this flux to a far-forward flux evaluated with next-to-leading order perturbative QCD, without intrinsic transverse momentum, that used the angular distribution of charm quarks rather than the neutrinos from their decays. The tau neutrino plus antineutrino number of events in the perturbative QCD evaluation is reduced by a factor of about three when intrinsic transverse momentum and the full decay kinematics are included. We show that intrinsic charm contributions can significantly enhance the number of events from neutrinos from charm hadron decays. Measurements of the number of events from tau neutrino plus antineutrino interactions and of the muon charge asymmetry as a function of energy can be used to constrain intrinsic charm models.

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“…The theoretical calculations are limited by the uncertainties in the scale, charm mass, and the nuclear PDFs. A non-perturbative intrinsic charm component proposed by Brodsky et al (1980) may also contribute (Bhattacharya and Cudell 2018). Prompt lepton production is not directly linked to the Muon Puzzle in air showers and primarily constrained by measurements of heavy-flavour production, but there is an overlapping interest in the analysis of proton-oxygen collisions at the LHC to better understand potential nuclear effects in the production of light and heavy flavour.…”

Section: Results Connected To the Muon Puzzlementioning

confidence: 99%

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

Albrecht,

Cazon,

Dembinski

et al. 2021

Preprint

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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 eventually decay into muons. 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. The origin of this discrepancy has been traced to the composition of secondary particles in hadronic interactions. The muon discrepancy starts at the TeV scale, which suggests that this change in hadron composition is observable at the Large

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Forward charm-production models and prompt neutrinos at IceCube

Abstract: We investigate the prompt neutrino background at IceCube, as determined from forward charm. We consider the role of intrinsic charm and of a recombination model and show that the contribution of these mechanisms is at most a factor two.

Cited by 8 publications

References 46 publications

High-Energy and Ultra-High-Energy Neutrinos

High-Energy and Ultra-High-Energy Neutrinos

Prompt neutrinos and intrinsic charm at SHiP

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

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