Nilmani Mathur

First results from 2+1 dynamical quark flavors on an anisotropic lattice: Light-hadron spectroscopy and setting the strange-quark mass

We present the first light-hadron spectroscopy on a set of

Charmed and bottom baryons from lattice NRQCD

{N}_{f}=2+1

Flavor structure of the excited baryon spectra from lattice QCD

dynamical, anisotropic lattices. A convenient set of coordinates that parameterize the two-dimensional plane of light and strange-quark masses is introduced. These coordinates are used to extrapolate data obtained at the simulated values of the quark masses to the physical light and strange-quark point. A measurement of the Sommer scale on these ensembles is made, and the performance of the hybrid Monte Carlo algorithm used for generating the ensembles is estimated.

Lattice study of light scalar tetraquarks with I=0,2,1/2,3/2: Are \sigma and \kappa tetraquarks?

The mass spectrum of charmed and bottom baryons has been computed on anisotropic lattices using quenched lattice nonrelativistic QCD. Masses are extracted by using mass splittings which are more accurate than masses obtained directly by using the nonrelativistic mass-energy relation. Of particular interest are the mass splittings between spin-1/2 and spin-3/2 heavy baryons, and we find that these color hyperfine effects are not suppressed in the baryon sector although they are known to be suppressed in the meson sector. Results are compared with those obtained in a previous NRQCD calculation and with those obtained from a Dirac-Wilson action of the D234 type.

Excited state nucleon spectrum with two flavors of dynamical fermions

Excited state spectra are calculated using lattice QCD for baryons that can be formed from

Nucleon strangeness form factors from N(f) = 2+1 clover fermion lattice QCD

u

Lattice study of quark and glue momenta and angular momenta in the nucleon

,

Spectroscopy of doubly charmed baryons from lattice QCD

d

Moments of nucleon's parton distribution for the sea and valence quarks from lattice QCD

and

Nucleons near the QCD deconfinement transition

s