I will start motivating and introducing the main New Physics avenues that will be considered in this talk. Then, I will discuss the potential of neutrino oscillation measurements to test these scenarios, paying particular attention to the role of tau neutrino detection. I will also comment on the potential opportunities that tau detection can provide in other related scenarios, as direct...
Natural sources produce neutrinos which travel to us over distances ranging from kilometers to gigaparsecs and beyond. Tau neutrinos form a considerable fraction of the neutrino flux, as a result of flavor oscillations. I will review some of the experimental considerations related to detection of atmospheric and cosmological tau neutrinos, and provide a brief overview of the various...
I will review what current measurements tell us about the elements of the PMNS matrix and the importance of the Tau row for the determination of Unitarity.
I review existing collider constraints on lepton universality breaking and lepton flavour violation, and their connection to direct BSM searches.
We review the connection between experimental searched for lepton flavor violation and properties of the tau neutrinos.
Over the last two decades, the experimental understanding of three flavor oscillations has improved dramatically. However, almost all of our understanding of neutrino physics is due to the study of electron and muon neutrinos, and the tau neutrino remains the least well-studied particle in the Standard Model.
The Deep Underground Neutrino Experiment (DUNE) is a next-generation neutrino...
Confirmation of oscillation-induced tau neutrino appearance in atmospheric and accelerator neutrino experiments has been an important piece of establishing the now standard PMNS oscillation paradigm. Though this process has been observed successfully, tau neutrinos continue to play an important role in oscillation physics at these experiments. Further scrutiny of PMNS mixing in order to...
Tau neutrino fluxes in the atmosphere and at the Large Hadron Collider arise from heavy-flavour production and decay. The reliability of their predictions is therefore deeply connected to the reliability of present predictions for charm and bottom production in hadronic collisions. I plan to discuss this subject, presenting the various sources of uncertainties affecting these predictions and...
In the long-baseline neutrino experiments, an interesting signature of sterile neutrinos could be the anomalous appearance of tau neutrinos in the near detectors, not expected in case of three-flavour oscillations. The sensitivities in the ($\sin^22\theta_{\mu\tau},\Delta m_{41}^2$) parameter space, based on full MINOS+ Monte Carlo simulation and reconstruction, for total statistics of MINOS+...
We consider the sensitivity of the DUNE experiment to a heavy neutral lepton, HNL (also known as sterile neutrino) in the mass range from a few MeV to a few GeV, interacting with the Standard Model via a transition magnetic moment to the active neutrinos, the so-called dipole portal. The HNL is produced via the up-scattering of active neutrinos, and the subsequent decay inside the detector...
DUNE will be a long baseline neutrino experiment utilizing liquid Argon TPC technology. As well as a rich program of neutrino oscillation and BSM physics studies, DUNE will have an unprecedented sensitivity to the tau neutrino appearance with an event rate of approximately 30 events per year and far detector module. Their study will improve the understanding of neutrino interactions and...
The DUNE Near Detector, with a LAr TPC (Liquid Argon Time Projection Chamber) as its primary detector, enables DUNE to probe for new physics beyond the Standard Model, such as short-baseline tau neutrino appearance mediated by sterile neutrino oscillations. Due to the high energy production threshold of the tau lepton and its very short lifetime, detection of tau neutrinos is very challenging,...
Testing the unitarity of the PMNS matrix can give insights into the existence of additional neutrino generations which would render the 3x3 leptonic mixing matrix non-unitarity. Current oscillation data mostly constrains the electron and muon row of the mixing matrix whereas the tau row still allows for large unitarity violation. Here we will focus on new unitary constraints on the tau row...
The significant neutrino flux at high rapidity at the LHC motivates dedicated forward detectors to study the properties of neutrinos at TeV energies. We investigate magnetic dipole interactions between different flavors of active neutrinos, and between the active neutrinos and new sterile states at emulsion and liquid argon experiments that could be located in a future Forward Physics Facility...
Experiments such as T2K and NOvA report the calculation of the cross-section (neutrino interactions) as the major contributor of systematic uncertainties in the measurement of oscillations. Determining the energy of neutrinos and neutrino-nucleus interactions relies on reconstruction techniques based on kinematics (T2K/HK) or calorimetric methods (DUNE/NOvA/SBN), and reliable interaction...
Neutrino interaction cross-sections have been measured at fixed target experiments and, at higher energies, by neutrino telescopes which observe neutrino absorption in the Earth. In this talk, I will discuss current cross-section measurements and future prospects.
The tau neutrino remains the most challenging flavor of neutrino to detect. While tau neutrinos are not generally expected to be produced in significant numbers in cosmic accelerators which produce the high energy neutrinos detected by IceCube, they should appear due to flavor change in flight between the source and the Earth. In this talk I will review methods of tau neutrino identification...
In the last decade the radio technique has experienced a spectacular leap forward, with many different experimental approaches and a diversity of proposals and experiments. Many of them take full advantage of the Earth skimming channel that was proposed soon after oscillations were discovered. After reviewing current understanding of the radio technique in general and the Earth skimming...
This talk will discuss the reconstruction techniques used in past experiments which performed nutau appearance searches and what can be learned from that experience for future searches.
Light sterile neutrinos have been put forward as an explanation of the anomalous measurements obtained in short-baseline neutrino experiments. In this talk I will review the status and discuss recent results in the search for light sterile neutrinos. Additionally, I will present extensions of the light sterile neutrino model that aim to explanations of these anomalous observations and resolve...
In this talk, I discuss the possibility of detecting tau events in the multi-GeV energy range originated via atmospheric muon neutrino to tau neutrino oscillation in the context of 50 kt magnetized Iron Calorimeter (ICAL) detector under the India-based Neutrino Observatory (INO) collaboration. I also discuss the possibility of exploring some interesting beyond the Standard Model (BSM)...
High-energy (TeV-PeV) and ultra-high-energy (> 100 PeV) tau neutrinos of cosmic origin offer great potential to test a wide variety of BSM scenarios. Because the tau sector in BSM searches is often the least constrained, measuring high-energy tau neutrinos represents an opportunity to make substantial progress. Today, we perform BSM tests using the IceCube TeV-PeV neutrinos, based on their...
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...
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...
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...
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...
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...
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...
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,...
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...
