In this talk I will discuss the main open questions in neutrino physics, and the experimental path that we will follow to address them in the future. I will focus on new physics searches in the neutrino sector, paying particular attention to those observables where a more precise knowledge of hadronic contributions could be key in order to distinguish a possible signal of new physics.
The analysis of neutrino experiments requires a quite precise knowledge of the weak interaction with hadrons. In this talk, I will present a few selected developments in this area. I will also show how the neutrino data open new opportunities in our research of hadronic Physics (axial structure, corrections to GT relations, ChPT LECS,..).
The majority of the mass content of the universe is composed by dark matter, whose specific nature is not known. Among the best motivated dark matter candidates are WIMPs, which can interact with atomic nuclei. Direct dark matter detection experiments aim to observe the scattering of WIMPs off nuclei.
The interpretation of direct detection experiments naturally depends on nuclear structure...
Loop-induced meson decays are rare in the standard model, but much more likely in the presence of light new particles. In this talk, we will explore the potential to find such particles in final states with missing energy or displaced lepton pairs. At low-energy experiments such as BELLE-II and NA62, we can expect a high sensitivity to hidden particles. I will discuss the discovery prospects...
Neutrinos are the most abundant matter particle and yet one of the most elusive. New results and new experiments, in particular in light of the discovery of neutrino mass, are changing the landscape of particle physics. As neutrino experiments have become both larger and higher precision, a better understanding of neutrino interactions is being realized. Many of these same experiments are...
In this talk I will discuss searches for neutrinoless double beta decay as a probe of lepton number violation. After a general introduction, I will discuss an “end-to-end” effective field theory approach to neutrinoless double beta decay based on the Standard Model EFT at high scales and on chiral effective theory at hadronic and nuclear scales. In this framework, I will discuss various...
I will discuss the recently proposed dark matter interpretation of the neutron lifetime discrepancy. The difference between bottle and beam neutron lifetime measurements is explained by the existence of a neutron dark decay channel with a branching fraction 1%. Phenomenologically consistent particle physics models of this type can be constructed; they involve either a strongly...
Given the increasing experimental accuracy in the measurement of several weak decay rates and in the calculation of the corresponding hadronic amplitudes, in order to make further progress in the determination of the CKM matrix and in the exploration of the limits of the Standard Model in flavour physics it is necessary to include electromagnetic effects and isospin breaking...
Recently, forward dispersion relations were applied to the calculation of the radiative $\gamma W$-box correction to neutron and nuclear $\beta$-decay. These new developments allowed to almost halve the hadronic uncertainty in $V_{ud}$. Taken at its face value, it lead to a significant shift in the extracted value of $V_{ud}$ and raised tension with the top-row CKM unitarity,...
We review recent high-precision results for different nucleon matrix elements based on a dispersive low-energy pion-nucleon scattering amplitude analysis using Roy-Steiner equations.
In particular, we focus on the phenomenological determination of the pion-nucleon $\sigma$-term, derived in combination with modern precision data on pionic atoms. We also discuss recent applications to the...
We present recent results of baryon matrix elements from lattice QCD simulations with $N_f=2+1$ non-perturbatively Wilson fermions (CLS ensembles). We also discuss octet baryon masses and sigma terms.
The evaluation of so-called disconnected diagrams in Lattice Quantum Chromodynamics (QCD) calculations of hadronic processes has been computationally challenging and expensive. These disconnected diagrams, which are fermionic Wick contraction diagrams involving quark propagators beginning and ending at the same time coordinates, are noisy and the extraction of lattice information from them is...
