Physics potential of an experiment using LHC neutrinos

Béni, N.; Brucoli, M.; Buontempo, S.; Cafaro, Valentina; Dallavalle, G. M.; Danzeca, Salvatore; Lellis, G. De; Crescenzo, A. Di; Giordano, V.; Guandalini, C.; Lazic, D.; Meo, S. Lo; Navarria, F. L.; Szillási, Z.

doi:10.1088/1361-6471/ab3f7c

Cited by 34 publications

(50 citation statements)

References 28 publications

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“…More detailed studies on the detector design and physics sensitivities are reported here for the first time. A recent study of Beni et al [37] has analyzed various locations around the LHC for neutrino detection and has found that, incorporating the background results from FASER, TI12 and TI18 are the best locations among those they considered.…”

Section: Introductionmentioning

confidence: 99%

Detecting and studying high-energy collider neutrinos with FASER at the LHC

et al. 2020

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Neutrinos are copiously produced at particle colliders, but no collider neutrino has ever been detected. Colliders produce both neutrinos and anti-neutrinos of all flavors at very high energies, and they are therefore highly complementary to those from other sources. FASER, the Forward Search Experiment at the LHC, is ideally located to provide the first detection and study of collider neutrinos. We investigate the prospects for neutrino studies with FASERν, a proposed component of FASER, consisting of emulsion films B. Denton and Callum Wilkinson: FASER Associate.

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Section: Introductionmentioning

confidence: 99%

Detecting and studying high-energy collider neutrinos with FASER at the LHC

et al. 2020

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“…[10], the contributions from W and Z production and decay to neutrinos are studied. They show that neutrinos from weak gauge boson decays populate mostly in the pseudorapidity range of |η| < 4.5, but are negligible in the region η > 6.5 [10]. Figure 9.…”

Section: Muon Neutrinosmentioning

confidence: 99%

“…The Faser collaboration uses a pseudorapidity cut η > 6.87 on particle momenta (here, neutrinos) in its second phase to determine if they enter a detector of radius 1.0 m. Other evaluations for this baseline use η > 6.7 [9]. For a half-cylinder, 2-meter long lead detector covering pseudorapidities η > 6.7, Beni et al [10] used Pythia 8 [16,18] to find ∼ 8, 700 tau neutrino events for a 3, 000 fb −1 integrated luminosity at the LHC. We adopt a minimum pseudorapidity η > 6.87 in this work for definiteness.…”

Section: Introductionmentioning

confidence: 99%

“…Heavy-flavor decays are not the only sources of forward neutrinos, but they dominate the forward tau-neutrino flux. The contributions from pp → W, Z production followed by W, Z leptonic decays are negligible for η ∼ > 6.5 [10]. On the other hand, for muon and electron neutrinos, charged pion (π ± ), kaon (K ± ) and K 0 e3 decays are most important.…”

Section: Introductionmentioning

confidence: 99%

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Far-forward neutrinos at the Large Hadron Collider

Bai

Diwan

Garzelli

et al. 2020

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We present a new calculation of the energy distribution of high-energy neutrinos from the decay of charm and bottom hadrons produced at the Large Hadron Collider (LHC). In the kinematical region of very forward rapidities, heavy-flavor production and decay is a source of tau neutrinos that leads to thousands of charged-current tau neutrino events in a 1 m long, 1 m radius lead neutrino detector at a distance of 480 m from the interaction region. In our computation, next-to-leading order QCD radiative corrections are accounted for in the production cross-sections. Non-perturbative intrinsic-k T effects are approximated by a simple phenomenological model introducing a Gaussian k T -smearing of the parton distribution functions, which might also mimic perturbative effects due to multiple initial-state soft-gluon emissions. The transition from partonic to hadronic states is described by phenomenological fragmentation functions. To study the effect of various input parameters, theoretical predictions for D ± s production are compared with LHCb data on double-differential cross-sections in transverse momentum and rapidity. The uncertainties related to the choice of the input parameter values, ultimately affecting the predictions of the tau neutrino event distributions, are discussed. We consider a 3+1 neutrino mixing scenario to illustrate the potential for a neutrino experiment to constrain the 3+1 parameter space using tau neutrinos and antineutrinos. We find large theoretical uncertainties in the predictions of the neutrino fluxes in the far-forward region. Untangling the effects of tau neutrino oscillations into sterile neutrinos and distinguishing a 3+1 scenario from the standard scenario with three active neutrino flavours, will be challenging due to the large theoretical uncertainties from QCD.

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“…Recently, attention has turned to opportunities of measuring the interactions of highly energetic tau neutrinos produced by pp collisions at the LHC [5][6][7][8][9][10][11]. Tau neutrino beams would allow for direct tests of lepton universality and to explore tau neutrino PMNS mixing in the traditional three-neutrino mixing paradigm and in scenarios including additional exotic neutrinos.…”

Section: Introductionmentioning

confidence: 99%

Far-forward neutrinos at the Large Hadron Collider

Bai

Diwan

Garzelli

et al. 2020

J. High Energ. Phys.

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We present a new calculation of the energy distribution of high-energy neutrinos from the decay of charm and bottom hadrons produced at the Large Hadron Collider (LHC). In the kinematical region of very forward rapidities, heavy-flavor production and decay is a source of tau neutrinos that leads to thousands of charged-current tau neutrino events in a 1 m long, 1 m radius lead neutrino detector at a distance of 480 m from the interaction region. In our computation, next-to-leading order QCD radiative corrections are accounted for in the production cross-sections. Non-perturbative intrinsic-k T effects are approximated by a simple phenomenological model introducing a Gaussian k T-smearing of the parton distribution functions, which might also mimic perturbative effects due to multiple initial-state soft-gluon emissions. The transition from partonic to hadronic states is described by phenomenological fragmentation functions. To study the effect of various input parameters, theoretical predictions for D ± s production are compared with LHCb data on double-differential cross-sections in transverse momentum and rapidity. The uncertainties related to the choice of the input parameter values, ultimately affecting the predictions of the tau neutrino event distributions, are discussed. We consider a 3+1 neutrino mixing scenario to illustrate the potential for a neutrino experiment to constrain the 3+1 parameter space using tau neutrinos and antineutrinos. We find large theoretical uncertainties in the predictions of the neutrino fluxes in the far-forward region. Untangling the effects of tau neutrino oscillations into sterile neutrinos and distinguishing a 3+1 scenario from the standard scenario with three active neutrino flavours, will be challenging due to the large theoretical uncertainties from QCD.

show abstract

Physics potential of an experiment using LHC neutrinos

Cited by 34 publications

References 28 publications

Detecting and studying high-energy collider neutrinos with FASER at the LHC

Detecting and studying high-energy collider neutrinos with FASER at the LHC

Far-forward neutrinos at the Large Hadron Collider

Far-forward neutrinos at the Large Hadron Collider

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