Prompt neutrinos and intrinsic charm at SHiP

Bai, Weidong; Reno, Mary Hall

doi:10.1007/jhep02(2019)077

Cited by 25 publications

(36 citation statements)

References 64 publications

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“…However, this is the region of x F in which the differential cross section is suppressed, and we shall see that the effect on the neutrino flux is small. 2 Our prediction for the prompt neutrino flux when including intrinsic charm contribution is consistent with results from other recent works [21][22][23]. It is significantly below the intrinsic charm contribution to the flux discussed in [24], which uses Λ 0,± production data from fixed-target experiments to deduce constraints on D 0,± production assuming extreme values of fractional momentum transferred to the finalcc pair.…”

Section: Intrinsic Charmsupporting

confidence: 88%

Forward charm-production models and prompt neutrinos at IceCube

Bhattacharya

Cudell

2018

J. High Energ. Phys.

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Section: Intrinsic Charmsupporting

confidence: 88%

Forward charm-production models and prompt neutrinos at IceCube

Bhattacharya

Cudell

2018

J. High Energ. Phys.

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“…(3.1) distorts the far-forward tau neutrino and antineutrino spectra. This is also the case in fixed-target experiments like SHiP [62]. The collinear parton model is sufficient for central collisions, but for forward production, as we have shown, non-collinear effects have a significant impact on the number of events for forward neutrino production at the LHC.…”

Section: Discussionmentioning

confidence: 71%

“…Details of the tau neutrino energy and angular distribution from D s → τ → ν τ appear in ref. [62]. The distributions of tau neutrinos and antineutrinos from the D s decays are identical because of the zero-spin of the meson (direct neutrinos) and the compensation of particle/antiparticle and left-handed/right-handed effects in the chain decays of the tau [59].…”

Section: Jhep06(2020)032mentioning

confidence: 97%

“…As discussed in more detail in ref. [62], we evaluate the neutrino and antineutrino charged-current cross sections at NLO, including mass effects [63][64][65][66][67], using the nCTEQ15 PDFs for lead [47]. neutrino energies above ∼ 10 GeV, deep inelastic scattering (DIS) dominates quasi-elastic scattering and few-pion production [68,69].…”

Section: Jhep06(2020)032mentioning

confidence: 99%

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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.

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“…(3.1) distorts the far-forward tau neutrino and antineutrino spectra. This is also the case in fixed-target experiments like SHiP [49]. The collinear parton model is sufficient for central collisions, but for forward production, as we have shown, non-collinear effects have a significant impact on the number of events for forward neutrino production at the LHC.…”

Section: Discussionmentioning

confidence: 71%

Far-forward neutrinos at the Large Hadron Collider

Bai

Diwan

Garzelli

et al. 2020

Self Cite

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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

Prompt neutrinos and intrinsic charm at SHiP

Cited by 25 publications

References 64 publications

Forward charm-production models and prompt neutrinos at IceCube

Forward charm-production models and prompt neutrinos at IceCube

Far-forward neutrinos at the Large Hadron Collider

Far-forward neutrinos at the Large Hadron Collider

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