## Grants and Contracts Details

### Description

Status | Active |
---|---|

Effective start/end date | 2/1/15 → 5/31/27 |

### Funding

- Department of Energy: $508,304.00

- Liu, Kehfei (PI)
- Draper, Terrence (CoI)

This is a program to study nucleon structure from lattice Quantum Chromodynamics
(QCD) with chiral fermions at the physical pion mass. The lattice gauge Monte Carlo
calculation of Quantum Chromodynamics involves generating an ensemble of gauge
background configurations with dynamical fermions and then calculating quark
propagators on this background to form various two-point, three-point, and four-point
correlation functions to study masses, decay constants, and nucleon structure through
form factors and lepton-nucleon scattering cross sections.
The realistic 3 flavor (u, d, and s quark) dynamical domain-wall fermion gauge
configurations are generated by the RBC and UKQCD collaborations on lattices of
different sizes and 5 lattice spacings at the physical pion mass point. The domain wall
has very desirable chiral symmetry similar to QCD theory in the continuum.
The specific quantities that we study include the gravitational form factors which can be
obtained from the moments of the experimental generalized parton distribution (GPD)
functions. This allows us to consider the decomposition of the proton spin and mass in
terms of quarks and gluons. These will be probed at Jefferson Lab and the upcoming
electron ion collider at Brookhaven National Lab. We also calculate the neutron electric
dipole moment with the theta term. This addresses the charge-parity (CP) violation
which may explain the excess of baryons in the Universe. This is being heavily pursued
experimentally. We will also calculate the hadronic tensor to predict the neutrino-
nucleon scattering cross section in the elastic, the resonance, and the shallow inelastic
scattering region. These are needed input for the neutrino-nucleus scattering cross
sections in order to help determine the neutrino flux in DUNE experiments. This will be a
valuable theoretical advancement to serve the experimental program which needs
precisely known neutrino flux in the energy range of 1 – 7 GeV in order to study neutrino
oscillations, CP violations, etc.

Status | Active |
---|---|

Effective start/end date | 2/1/15 → 5/31/27 |

- Department of Energy: $508,304.00

Explore the research topics touched on by this project. These labels are generated based on the underlying awards/grants. Together they form a unique fingerprint.