0000000000122374
AUTHOR
Parikshit Junnarkar
Nucleon isovector charges and twist-2 matrix elements with Nf=2+1 dynamical Wilson quarks
We present results from a lattice QCD study of nucleon matrix elements at vanishing momentum transfer for local and twist-2 isovector operator insertions. Computations are performed on gauge ensembles with nonperturbatively improved ${N}_{f}=2+1$ Wilson fermions, covering four values of the lattice spacing and pion masses down to ${M}_{\ensuremath{\pi}}\ensuremath{\approx}200\text{ }\text{ }\mathrm{MeV}$. Several source-sink separations (typically $\ensuremath{\sim}1.0$ to $\ensuremath{\sim}1.5\text{ }\text{ }\mathrm{fm}$) allow us to assess excited-state contamination. Results on individual ensembles are obtained from simultaneous two-state fits across all observables and all available sou…
Nucleon isovector charges and twist-2 matrix elements with Nf=2+1 dynamical Wilson quarks
We present results from a lattice QCD study of nucleon matrix elements at vanishing momentum transfer for local and twist-2 isovector operator insertions. Computations are performed on gauge ensembles with nonperturbatively improved Nf=2+1 Wilson fermions, covering four values of the lattice spacing and pion masses down to Mπ≈200 MeV. Several source-sink separations (typically ∼1.0 to ∼1.5 fm) allow us to assess excited-state contamination. Results on individual ensembles are obtained from simultaneous two-state fits across all observables and all available source-sink separations with the energy gap as a common fit parameter. Renormalization has been performed nonperturbatively using the R…
Isovector electromagnetic form factors of the nucleon from lattice QCD and the proton radius puzzle
Physical review / D 103(9), 094522 (2021). doi:10.1103/PhysRevD.103.094522
Lattice QCD study of the $H$ dibaryon using hexaquark and two-baryon interpolators
Physical review / D 99(7), 074505 (2019). doi:10.1103/PhysRevD.99.074505
Electromagnetic form factors and axial charge of the nucleon from Nf = 2 + 1 Wilson fermions
We present an update on our determination of the electromagnetic form factors and axial charge of the nucleon from theNf= 2 + 1 CLS ensembles with increased statistics and an additional finer lattice spacing. We also investigate the impact ofO(a)-improvement of the currents.
Search for the H-Dibaryon in two flavor Lattice QCD
Parikshit Junnarkar∗, Anthony Francis, Jeremy Green, Chuan Miao, Thomas Rae, Hartmut Wittig Helmholtz-Institut Mainz, Institut fur Kernphysik, and PRISMA Cluster of Excellence, Johannes Gutenberg-Universitat Mainz, Germany Department of Physics and Astronomy, York University, Toronto Canada Bergische Universitat Wuppertal, Germany E-mail: junnarka@kph.uni-mainz.de, afranc@yorku.ca, green@kph.uni-mainz.de, chuan@kph.uni-mainz.de, thrae@uni-wuppertal.de, wittig@kph.uni-mainz.de