4th Forward Physics Facility Meeting

Session

Neutrino Working Group

Jan 31, 2022, 7:15 PM

Conveners

Neutrino Working Group

• Mary Hall Reno

1. Excess of Tau events at SND@LHC, FASER$\nu$ and FASER$\nu$2

Prof. Yasaman Farzan (IPM)

1/31/22, 7:15 PM

During the run III of the LHC, the forward experiments FASER$\nu$ and SND@LHC will be able to detect the Charged Current (CC) interactions of the high energy neutrinos of all three flavors produced at the ATLAS Interaction Point (IP). This opportunity may unravel mysteries of the third generation leptons. We build three models that can lead to a tau excess at these detectors through the...

36. Oscillations and sterile neutrinos

Timo Kärkkäinen

1/31/22, 7:30 PM

Sterile neutrinos are hypothetical massive neutral leptons, which mix with the neutrinos of the Standard Model, and which are singlets of the SM gauge symmetry. Therefore their mass term can be included directly in the Lagrangian, assuming they are Majorana fermions. They are motivated by their potential to explain the origin of dark matter, light neutrino masses and oscillations, and baryonic...

12. 4-fermion operators and their UV completion at FASERv

Yong Du (ITP CAS)

1/31/22, 7:45 PM

The high-luminosity of neutrinos at FASERv and FASERv2 makes them excellent facilities for neutrino studies. In this talk, after briefly reviewing very interesting physics from the 4-fermion operators, I will then present sensitivities to them at FASERv and FASERv2 model independently in the EFT framework. Time permitting, the corresponding implications on specific phenomenologically...

35. Parton distribution function uncertainties in theoretical predictions for far-forward tau neutrino fluxes at the Large Hadron Collider

Weidong Bai

1/31/22, 8:00 PM

Far-forward tau neutrinos and antineutrinos come predominantly from Ds± production in pp collisions, followed by the leptonic decay of these mesons. At such large pseudorapidities, theoretical predictions rely on parton distribution functions (PDFs) in a combination of very small and large parton−x values. We evaluate the 3-flavor PROSA PDF uncertainties in a next-to-leading order (NLO) QCD...

10. TeV neutrino cross sections

Dr Alfonso Andres Garcia Soto (NIKHEF)

1/31/22, 8:15 PM

There are no neutrino cross-section measurements from 400 GeV to 10 TeV. Nevertheless, experiments like FASERnu estimate interaction rates that will allow us to measure the cross section in this unexplored region. Neutrinos with energies above a few hundred GeV will primarily interact via Deep Inelastic Scattering. We compare different model predictions in this energy range.

40. Neutrino cross sections in the SIS-DIS transition region

Dr Yu Seon Jeong (Chung-Ang University (KOR))

1/31/22, 8:30 PM

Neutrino experiments of the FPF will be able to measure different types of neutrino interactions due to its broad energy range. In this talk, we discuss neutrino cross sections in the transition region between the shallow- and deep- inelastic scattering focusing on the impact of $W_{min}$ and $Q^2$.

38. Resonant anti-neutrino electron scattering at the FPF

Ryan Plestid

1/31/22, 8:45 PM

We discuss detection prospects for Standard Model resonances at FASER$\nu$ and FLArE. The primary channel of interest is the production of $\rho^-$ resonances which yield two-pion final states, $\pi^-\pi^0$, with no additional hadronic activity and no leptons in the final state. We conclude that FASER$\nu$ (and especially FASER$\nu$-2) have the best detection prospects due to their nuclear...