Detecting and Studying High-Energy Collider Neutrinos with FASER at the LHC

Abreu, Henso; Antel, Claire; Ariga, Akitaka; Ariga, Tomoko; Boyd, Jamie; Cadoux, Franck; Casper, David W.; Chen, Xin; Coccaro, Andrea; Dozen, Candan; Denton, Peter B.; Favre, Yannick; Feng, Jonathan L.; Ferrere, Didier; Galon, Iftah; Gibson, Stephen; Gonzalez-Sevilla, Sergio; Hsu, Shih-Chieh; Hu, Zhen; Iacobucci, Giuseppe; Jakobsen, Sune; Jansky, Roland; Kajomovitz, Enrique; Kling, Felix; Kuehn, Susanne; Levinson, Lorne; Li, Congqiao; McFayden, 1 Josh; Meehan, Sam; Neuhaus, Friedemann; Otono, Hidetoshi; Petersen, Brian; Pikhartova, Helena; Queitsch-Maitland, Michaela; Sato, Osamu; Schmieden, Kristof; Schott, Matthias; Sfyrla, Anna; Shively, Savannah; Smolinsky, Jordan; Soffa, Aaron M.; Takubo, Yosuke; Torrence, Eric; Trojanowski, Sebastian; Wilkinson, Callum; Zhang, Dengfeng; Zhang, Gang

doi:10.48550/arxiv.1908.02310

Cited by 13 publications

(59 citation statements)

References 140 publications

(194 reference statements)

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“…1 we additionally show the energy spectra of neutrinos that interact in FASERν, as obtained in Ref. [1]. We can see that the neutrino spectra are broad band and span over more than one order of magnitude in energy, indicating FASERν's potential to measure neutrino cross sections in currently unprobed energy ranges for all three neutrino flavors.…”

Section: Physics Goalsmentioning

confidence: 53%

“…FASERν is a proposed emulsion detector designed to detect and study the interactions of neutrinos produced at the LHC [1]. FASERν will be located along the beam collision axis, 480 m from the ATLAS interaction point (IP) in the unused tunnel TI12, and directly in front of the Forward Search Experiment (FASER) spectrometer [2][3][4][5].…”

Section: Executive Summarymentioning

confidence: 99%

“…The physics motivations and detector concept for FASERν have been discussed previously in the FASERν Letter of Intent (LOI) [1]. In this document, we describe the technical aspects of the experiment in more detail.…”

Section: Executive Summarymentioning

confidence: 99%

“…[1]. tau neutrinos will be produced in the far-forward region of the ATLAS IP [1]. However, despite the fact that neutrinos are copiously produced at the LHC, no collider neutrino has been detected so far.…”

Section: Physics Goalsmentioning

confidence: 99%

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Technical Proposal: FASERnu

Collaboration¹,

Abreu²,

Andreini³

et al. 2020

Preprint

Self Cite

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Section: Physics Goalsmentioning

confidence: 53%

Section: Executive Summarymentioning

confidence: 99%

Section: Executive Summarymentioning

confidence: 99%

Section: Physics Goalsmentioning

confidence: 99%

See 2 more Smart Citations

Technical Proposal: FASERnu

Collaboration¹,

Abreu²,

Andreini³

et al. 2020

Preprint

Self Cite

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“…Natural neutrinos are also used to study neutrino interactions at energies above those that are accessible at accelerators, where the highest available neutrino energy is 500 GeV, although this range will be extended by the planned FASERν experiment located at the Large Hadron Collider [12]. IceCube has measured the neutrino-nucleon cross sections for ν µ [13] and for a primarily ν e mixture [14,15].…”

Section: Introductionmentioning

confidence: 99%

Nuclear effects in high-energy neutrino interactions

Klein,

Robertson,

Vogt

2020

Preprint

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Neutrino telescopes like IceCube, KM3NeT and Baikal-GVD offer physicists the opportunity to study neutrinos with energies far beyond the reach of terrestrial accelerators. These neutrinos are used to study high-energy neutrino interactions and to probe the Earth through absorption tomography. Current studies of TeV neutrinos use cross sections which are calculated for free nucleons with targets which are assumed to contain equal numbers of protons and neutrons.Here we consider modifications of high-energy neutrino interactions due to two nuclear effects: modifications of the parton densities in the nucleus, referred to here as shadowing, and the effect of non-isoscalar targets, with unequal numbers of neutrons and protons. Both these effects depend on the interaction medium. Because shadowing is larger for heavier nuclei, such as iron, found in the Earth's core, it introduces a zenith-angle dependent change in the absorption cross section. These modifications increase the cross sections by 1-2% at energies below 100 TeV (antishadowing), and reduce it by 3-4% at higher energies (shadowing).Nuclear effects also alter the inelasticity distribution of neutrino interactions in water/ice by increasing the number of low inelasticity interactions, with a larger effect for ν than ν. These effects are particularly large in the energy range below a few TeV. These effects could alter the cross sections inferred from events with tracks originating within the active detector volume as well as the ratio ν/ν inferred from inelasticity measurements.The uncertainties in these nuclear effects are larger than the uncertainties on the free-proton cross sections and will thus limit the systematic precision of future high-precision measurements at neutrino telescopes.

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Probing the mixing between sterile and tau neutrinos in the SHiP experiment

Choi,

Kim,

Kim

et al. 2024

J. High Energ. Phys.

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We study the expected sensitivity to the mixing between sterile and tau neutrinos directly from the tau neutrino disappearance in the high-energy fixed target experiment. Here, the beam energy is large enough to produce tau neutrinos at the target with large luminosity. During their propagation to the detector, tau neutrinos may oscillate into sterile neutrinos. By examining the energy spectrum of the observed tau neutrino events, we can probe the mixing between sterile and tau neutrinos directly. In this paper, we consider Scattering and Neutrino Detector (SND) at SHiP experiment as a showcase, which uses 400 GeV protons from SPS at CERN, and expect to observe 7,300 tau and anti-tau neutrinos from the 2 × 1020 POT for 5 years operation. Assuming the uncertainty of 10%, we find the sensitivity |Uτ4|2 ∼ 0.08 (90% CL) for $$ \Delta {m}_{41}^2 $$ ∆ m 41 2 ∼ 500 eV2 with 10% background to the signal. We also consider a far SND at the end of the SHiP Hidden Sector Decay Spectrometer (HSDS), in which case the sensitivity would be enhanced to |Uτ4|2 ∼ 0.02. Away from this mass, the sensitivity becomes lower than |Uτ4|2 ∼ 0.15 for $$ \Delta {m}_{41}^2 $$ ∆ m 41 2 ≲ 100 eV2 or $$ \Delta {m}_{41}^2 $$ ∆ m 41 2 ≳ 104eV2.

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Detecting and Studying High-Energy Collider Neutrinos with FASER at the LHC

Cited by 13 publications

References 140 publications

Technical Proposal: FASERnu

Technical Proposal: FASERnu

Nuclear effects in high-energy neutrino interactions

Probing the mixing between sterile and tau neutrinos in the SHiP experiment

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