Recent results of the OPERA experiment

Pupilli, F.

doi:10.1063/1.4953321

Cited by 3 publications

(3 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Of particular interest are tau neutrinos, as the direct detection of tau neutrinos is thus far limited to 9 ν τ events at DONUT [3,4] and 10 tau neutrino candidate events at Opera [5,6]. In ref.…”

Section: Introductionmentioning

confidence: 99%

Prompt neutrinos and intrinsic charm at SHiP

Bai

Reno

2019

J. High Energ. Phys.

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

Prompt neutrinos and intrinsic charm at SHiP

Bai

Reno

2019

J. High Energ. Phys.

View full text Add to dashboard Cite

show abstract

“…A source of high-energy tau neutrinos opens the possibility of new tests of the Standard Model that can not be done at DUNE. Measurements of LHC forward tau neutrino interactions can be used for direct tests of lepton flavor universality in charged current interactions with much higher statistics than achieved by Donut [22,23] and Opera [24,25]. Both Super-Kamiokande and IceCube have reported signs of tau neutrino appearance in their datasets, but the statistics is still very limited [26,27].…”

Section: Introductionmentioning

confidence: 99%

Far-forward neutrinos at the Large Hadron Collider

Bai

Diwan

Garzelli

et al. 2020

J. High Energ. Phys.

View full text Add to dashboard Cite

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

“…The tau neutrino was first directly detected by the DONuT (Direct observation of the nu tau) collaboration at Fermilab in 2000 [6]. Since then, only several events have been detected in the world, in which DONuT collaboration found 9 tau neutrino and antineutrino events [7] and the OPERA (Oscillation Project with Emulsion-tRacking Apparatus) collaboration found 10 candidate tau neutrino events [8,9]. With these events, the direct experimental knowledge of the tau neutrino interaction is limited.…”

Section: Introductionmentioning

confidence: 99%

Charm production and prompt neutrino fluxes in beam dump and collider experiments

Bai¹

View full text Add to dashboard Cite

Recent results of the OPERA experiment

Cited by 3 publications

References 14 publications

Prompt neutrinos and intrinsic charm at SHiP

Prompt neutrinos and intrinsic charm at SHiP

Far-forward neutrinos at the Large Hadron Collider

Charm production and prompt neutrino fluxes in beam dump and collider experiments

Contact Info

Product

Resources

About