Workshop on Tau Neutrinos from GeV to EeV 2021 (NuTau2021)

Session

Contributed talks II

1 Oct 2021, 10:50

This workshop will be held as a virtual event (Hosted by Brookhaven National Laboratory)

Conveners

Contributed talks II

• Barbara Yaeggy (Cinncinati)
• Oleksandr Tomalak (Los Alamos National Laboratory)

Contributed talks II

• Yuchieh Ku (Penn State)
• Nepomuk Otte (Georgia Institute of Technology)
• Tom Stuttard (Niels Bohr Institute)
• Mahdi Bagheri (Georgia Institute of Technology)

55. nutau-nucleon/nucleus deep inelastic scattering in the multi-GeV energy region

VANIYA ANSARI (ALIGARH MUSLIM UNIVERSITY)

01/10/2021, 10:50

We shall present the results for a study of some perturbative and nonperturbative effects on the evaluation of the nutau(nutaubar)-nucleon scattering cross sections. The free nucleon structure functions have been obtained by using the evolution of parton distribution functions at the next-to leading order and taking the effects of kinematical and dynamical higher twists. These free nucleon...

56. On the Tau flavor of the cosmic neutrino flux

Yasaman Farzan (IPM)

01/10/2021, 11:05

We show how the detection of the tau events by ICECUBE constrains the interaction of the neutrinos with ultralight dark matter and discuss the implications of this interaction for even higher energy cosmic neutrinos detectable by future radio telescopes such as ARA, ARIANNA and GRAND. We also revisit the $3+1$ neutrino scheme and clarify a misconception about the evolution of high energy...

57. KM3NeT/ORCA sensitivity to atmospheric tau-neutrino appearance

Steffen Hallmann (DESY)

01/10/2021, 12:20

ORCA is the low-energy branch of the KM3NeT neutrino facility under construction in the Mediterranean Sea and optimised to study oscillations of atmospheric neutrinos in the few-GeV energy range. Using the first six (out of a final 115) deployed detection units, ORCA is already now able to confirm the disappearance of muon neutrino charged-current events with 5σ. Once completed, an...

47. The Giant Radio Array for Neutrino Detection - the experimental status and plans

Lech W Piotrowski (University of Warsaw)

01/10/2021, 12:35

The Giant Radio Array for Neutrino Detection (GRAND) project aims to find the sources of Ultra-High Energy Cosmic Rays (UHECRs) in the Universe. This would be achieved by deploying 200,000 radio antennas over 200,000 km2, gathering enough UHE neutrino, cosmic ray and gamma-ray events to pinpoint UHECRs origin. The use of a sparse array of antennas would allow achieving statistics far beyond...

48. Prospects for EeV tau-neutrino physics with in-ice radio detectors

Christian Glaser (Uppsala University, Sweden)

01/10/2021, 12:50

The detection of the radio emission following a neutrino interaction in ice is a promising technique to obtain significant sensitivities to neutrinos with energies above 10 PeV. The detectable radio emission stems from particle showers in the ice. With the RNO-G detector being under construction in Greenland, and the plans for an order-of-magnitude more sensitive radio detector as part of...

58. POEMMA: Probe Of Extreme Multi-Messenger Astrophysics

John F Krizmanic (UMBC/CRESST/NASA/GSFC)

01/10/2021, 13:05

The Probe Of Extreme Multi-Messenger Astrophysics (POEMMA) is designed to observe cosmic neutrinos and to identify the sources of ultra-high energy cosmic rays (UHECRs). POEMMA consists of two spacecraft flying in a loose formation at 525 km altitudes with each spacecraft hosting a large Schmidt telescope with a focal plane optimized to observe both the optical Cherenkov signals and the...

59. Break

01/10/2021, 13:20

46. Axial and pseudoscalar form factor with tau neutrinos

Oleksandr Tomalak (Los Alamos National Laboratory)

01/10/2021, 13:30

We study the sensitivity to axial nucleon structure of single-spin asymmetries in (anti)neutrino charged current quasielastic scattering on free nucleons. The weak interaction gives rise to relatively large single-spin asymmetries at leading order. Besides the axial form factor, the pseudoscalar form factor can be accessed with tau (anti)neutrinos measuring recoil and target transverse...

49. Looking for HNLs via Double Bang signals

Ivan Martinez-Soler (Fermilab and Northwestern University)

01/10/2021, 13:45

Heavier neutral leptons are predicted in many extensions of the SM as a solution of several fundamental questions like the origin of the neutrino masses. In this talk, we will consider the detection of HNLs using ''double-bang'' signals. Several models can explain this type of event, here we will consider two: the production of HNLs via mixing with the light neutrinos and through a transition...

50. Tau neutrino propagation with NuPropEarth

Alfonso Garcia (Harvard University)

01/10/2021, 14:00

Understanding the propagation of neutrinos through matter is fundamental to quantify the sensitivity to detect high-energy tau neutrinos. NuPropEarth is a simulation framework with the structure of a general-purpose Monte Carlo event generator and therefore allows following the path and interactions of individual neutrinos as they travel through Earth on an event-by-event basis. In this talk,...

51. Probing Secret Interactions of Tau Neutrinos in the High-Statistics Era

Ivan Esteban (CCAPP, Ohio State University)

01/10/2021, 14:15

Do neutrinos have sizable self-interactions? They might. Laboratory constraints are weak, so strong effects are possible in astrophysical environments and the early universe. Observations with neutrino telescopes can provide an independent probe of neutrino self (“secret”) interactions, as the sources are distant and the cosmic neutrino background intervenes. We define a roadmap for making...