Neutrini and nuclei, challenges and opportunities for nuclear theory

Europe/Rome
Meeting room (ECT* - Trento)

Meeting room

ECT* - Trento

Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy
Alessandro Lovato ( INFN - TIFPA ) (INFN - TIFPA), Juan Nieves ( CSIC & Universidad de Valencia ) (CSIC & Universidad de Valencia), Saori Pastore ( Washington University ) (Washington University), Noemi Rocco ( Argonne National Laboratory & Fermilab ) (Argonne National Laboratory & Fermilab)
Description

Neutrini and nuclei, challenges and opportunities for nuclear theory

Accurate predictions of neutrino-nucleus interactions are essential to long-baseline neutrino-oscillation programs. Current- and next-generation experiments are sensitive to a broad range of energy, characterized by different reaction mechanisms involving both nucleon and nuclear excitations. Achieving a comprehensive description within a unified framework is a formidable nuclear- and particle-theory challenge. Nuclear effective field theories (EFTs), coupled to accurate nuclear many-body methods, allow for a consistent description of nuclear structure and low-energy electroweak observables. This workshop aims at assessing how nuclear EFTs can be extended to account for processes characterized by momentum and energy scales larger than the pion mass. Specific open problems, such as: how to properly include single-nucleon excitations, relativistic effects, and inelasticity, will be addressed. To achieve this goal, we bring together nuclear and hadron theorists and arrange for specialized and focused talks, best suited to spur discussions and collaborations.

Main Topics:

Current- and next- generation neutrino-oscillation experiments require nuclear physics calculations of structure and electroweak properties of atomic nuclei with quantified theoretical uncertainties. Nuclear effective field theories (EFTs) allow for a systematic derivation of the nuclear hamiltonian and many-body currents, both required to describe neutrino's interactions with nuclei. Despite this success, there are key points that remain to be determined and that will be the main focus of our workshop: 

  • Test the extent and validity of EFTs: we present available models for inter-nucleon interactions and consistent electroweak many-body nuclear currents from EFTs. We discuss open issues, such as, determination of the free-parameters (LECs) entering the models from both experiments and lattice QCD calculations; sensitivity of these models to cut-off variations; applicability of EFT-based operators to larger values of energy and momentum transfer.

 

  • How to transition to regions where single-nucleon excitations, resonance-and meson-production occur : we present available phenomenological models applicable at higher values of energy and momentum transfer. We discuss open issues, such as, how to benchmark phenomenological models to the low-energy description provided by EFTs; how to consistently incorporate single-nucleon excitations, resonance- and meson-production.

 

  • How to properly incorporate relativistic effects: we present available relativistic models and discuss how to incorporate relativistic effects retaining the complexity of nuclear dynamics. We will seek for connections with EFT-based non-relativistic calculations in the intermediate momentum-transfer region. Strategies involving controlled approximations of the nuclear many-body problem, such as the use of spectral functions and momentum distributions, will be discussed.

 

                   ECT*                                 FBK                                ENSAR2      

Secretariat - Ines Campo
    • 08:00 09:30
      Registration
    • 09:30 12:15
      Morning Session
      • 09:30
        Welcome 15m
        Speakers: Alessandro Lovato (ANL & INFN), Juan Nieves (CSIC & IFIC), Noemi Rocco (ANL & FNAL), Saori Pastore (WashU)
      • 09:45
        Neutrino-nucleus scattering: status and opportunities 1h
        Speaker: Omar Benhar (INFN and Sapienza University)
      • 10:45
        Coffee break 30m
      • 11:15
        Dark-matter interactions in light nuclei 1h
        Speaker: Lorenzo Andreoli (University of Trento)
    • 12:30 14:30
      Lunch break 2h
    • 14:30 16:30
      Afternoon Session
      • 14:30
        Lattice-QCD for few-nucleon systems 45m
        Speaker: Assumpta Parreńo (University of Barcelona)
      • 15:15
        Coffee Break 30m
      • 15:45
        One- and two-pion production in neutrino-nucleon scattering 45m
        Speaker: Eliacer Hernandez (University of Salamanca)
    • 16:30 17:55
      Discussion: afternoon session
      Convener: Luis Alvarez Ruso (CSIC & IFIC)
    • 09:30 12:15
      Morning Session
      • 09:30
        From light nuclei to neutron matter within chiral dynamics 45m
        Speaker: Maria Piarulli (WashU)
      • 10:15
        Coffee break 30m
      • 10:45
        Neutrino-induced pion production 45m
        Speaker: Toru Sato (Osaka University)
      • 11:30
        Nonlocal dispersive optical potential model 45m
        Speaker: Mack Atkinson (WashU)
    • 12:30 14:30
      Lunch 2h
    • 14:30 16:45
      Afternoon Session
      • 14:30
        Hyperon production in neutrino-nucleus interaction 45m
        Speaker: Joanna Sobczyk (IFIC)
      • 15:15
        Coffe Break 30m
      • 15:45
        Lattice-QCD calculations of nucleon form factors 1h
        Speaker: Rajan Gupta (LANL)
    • 16:45 18:00
      Discussion: afternoon session
      Convener: Assumpta Parreńo (University of Barcelona)
    • 09:30 12:15
      Morning Session
      • 09:30
        Quantum Monte Carlo calculations of neutrino-nucleus interactions 45m
        Speaker: Joe Carlson
      • 10:15
        Coffee break 30m
      • 10:45
        Few-body systems from pionless EFT 45m
        Speaker: Hilla Deleon (ECT*)
      • 11:30
        Electroweak pion production within the hybrid PWIA 45m
        Speaker: Raul Gonzalez Jimenez (University of Madrid)
    • 12:30 14:30
      Lunch break 2h
    • 14:30 15:45
      Afternoon Session
      • 14:30
        Determination of three-nucleon interactions 45m
        Speaker: Michele Viviani (University of Pisa)
      • 15:15
        Coffee break 30m
    • 15:45 17:30
      Discussion
      Convener: Rocco Schiavilla (JLAB & ODU)
    • 09:30 12:15
      Morning Session
      • 09:30
        LIT for electroweak scattering 45m
        Speaker: Sonia Bacca (University of Mainz)
      • 10:15
        Coffee break 30m
      • 10:45
        Relativistic meson-exchange current contribution 45m
        Speaker: Arturo De Pace (INFN)
      • 11:30
        Electroweak currents from chiral EFT 45m
        Speaker: Hermann Krebs (Bochum University)
    • 12:30 14:30
      Lunch 2h
    • 14:30 16:30
      Afternoon Session
      • 14:30
        RPA response functions 45m
        Speaker: Alexis Nikolakopoulos (Ghent University)
      • 15:15
        Coffee break 30m
      • 15:45
        SCGF calculations of nuclear structure and dipole responses 45m
        Speaker: Francesco Raimondi (Université Paris-Saclay)
    • 16:30 18:15
      Discussion
      Convener: Michele Viviani (INFN)
    • 09:30 11:30
      Morning Session
      • 09:30
        Valencia model for neutrino-nucleus interaction 45m
        Speaker: Luis Alvarez Ruso (CSIC & IFIC)
      • 10:15
        Coffee break 30m
      • 10:45
        Relativistic effect in ab-initio approaches 45m
        Speaker: Giuseppina Orlandini (University of Trento)
    • 11:30 12:30
      Discussion
      Convener: Sonia Bacca (University of Mainz)
    • 12:30 14:30
      Lunch 2h
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