Speaker
Mr
Nolan Miller
(University of North Carolina, Chapel Hill)
Description
We report a preliminary, percent-level determination of the nucleon mass $M_N$ and a roughly 5%-level determination of the sigma term $\sigma_{\pi N}$ from lattice QCD. We find that our $M_N$ extrapolation to the physical point agrees with the PDG average. Next we review the significance of $\sigma_{\pi N}$ for direct dark matter searches, and we explore the sensitivity of this observable over choice of chiral models. For our lattice calculations, we employ Möbius domain wall fermions on $N_F = 2 + 1+ 1$ dynamically, highly-improved staggered quark fermions. We include five pion masses, ranging from 130 MeV to 350 MeV; four lattice spacings, ranging from 0.06 fm to 0.15 fm; and multiple lattice volumes.
Primary author
Mr
Nolan Miller
(University of North Carolina, Chapel Hill)
Co-authors
Dr
Aaron Meyer
(Brookhaven National Laboratory)
Dr
Amy Nicholson
(University of North Carolina, Chapel Hill)
Dr
André Walker-Loud
(Lawrence Berkeley National Laboratory)
Dr
Christian Drischler
(University of California, Berkeley)
Dr
Christopher Körber
(Ruhr-University Bochum)
Dr
Dean Howarth
(Lawrence Livermore National Laboratory)
Mr
Grant Bradley
(Brown University)
Dr
Henry Monge
(University of Costa Rica)
Mr
Malcolm Lazarow
(University of California, Berkeley)
