96 citations · 873 across the 27 of their papers we have counts for
29 papers · 1 filter
The Momentum Fraction, Helicity and Transversity Isovector Moments of Nucleons from \texorpdfstring{}{2+1}-flavor Lattice QCD
Santanu Mondal, Rajan Gupta, Sungwoo Park +5
Results for the isovector momentum fraction, , helicity moment, , and the transversity moment, , of th…
Nucleon form factors and the pion-nucleon sigma term
Rajan Gupta, Tanmoy Bhattacharya, Vincenzo Cirigliano +8
This talk summarizes the progress made since Lattice 2021 in understanding and controlling the contributions of towers of multihadron excited states with mass gaps starting lower t…
Excited states and precision results for nucleon charges and form factors
Rajan Gupta, Tanmoy Bhattacharya, Vincenzo Cirigliano +8
The exponentially falling signal-to-noise ratio in all nucleon correlation functions, and the presence of towers of multihadron excited states with relatively small mass gaps makes…
Nucleon isovector momentum fraction, helicity and transversity moment using Lattice QCD
Santanu Mondal, Tanmoy Bhattacharya, Rajan Gupta +5
We present our recent high precision calculations (Phys. Rev. D102 (2020) no.5, 054512 and JHEP 04 (2021) 044, JHEP 21 (2020) 004) of the first moment of nucleon isovector polarize…
Precision Nucleon Charges and Form Factors Using 2+1-flavor Lattice QCD
Sungwoo Park, Rajan Gupta, Boram Yoon +5
We present high statistics results for the isovector nucleon charges and form factors using seven ensembles of 2+1-flavor Wilson-clover fermions. The axial and pseudoscalar form fa…
The axial charge of the triton from lattice QCD
Assumpta Parreño, Phiala E. Shanahan, Michael L. Wagman +4
The axial charge of the triton is investigated using lattice quantum chromodynamics (QCD). Extending previous work at heavier quark masses, calculations are performed using three e…
Nucleon Momentum Fraction, Helicity and Transversity from 2+1-flavor Lattice QCD
Santanu Mondal, Rajan Gupta, Sungwoo Park +4
High statistics results for the isovector momentum fraction, , helicity moment, , and the transversity moment, $\langle x\rangle…
The Positive-Parity Baryon Spectrum and the Role of Hybrid Baryons
Tanjib Khan, David Richards, Frank Winter
We calculate the low-lying spectra for the positive-parity and at two pion masses of 358 and 278 MeV using an isotropic clover action with two degenerate light-quaark and o…
Lattice QCD constraints on the parton distribution functions of
William Detmold, Marc Illa, David J. Murphy +5
The fraction of the longitudinal momentum of that is carried by the isovector combination of and quarks is determined using lattice QCD for the first time.…
Low-energy Scattering and Effective Interactions of Two Baryons at MeV from Lattice Quantum Chromodynamics
Marc Illa, Silas R. Beane, Emmanuel Chang +9
The interactions between two octet baryons are studied at low energies using lattice QCD (LQCD) with larger-than-physical quark masses corresponding to a pion mass of …
Controlling Excited-State Contributions with Distillation in Lattice QCD Calculations of Nucleon Isovector Charges , ,
Colin Egerer, David Richards, Frank Winter
We investigate the application of the distillation smearing approach, and the use of the variational method with an extended basis of operators facilitated by this approach, on the…
Nuclear modification of scalar, axial and tensor charges from lattice QCD
Emmanuel Chang, Zohreh Davoudi, William Detmold +6
Complete flavour decompositions of the scalar, axial and tensor charges of the proton, deuteron, diproton and He at SU(3)-symmetric values of the quark masses corresponding to…
First lattice QCD study of the gluonic structure of light nuclei
Frank Winter, William Detmold, Arjun S. Gambhir +4
The role of gluons in the structure of the nucleon and light nuclei is investigated using lattice quantum chromodynamics (QCD) calculations. The first moment of the unpolarised glu…
Baryon-Baryon Interactions and Spin-Flavor Symmetry from Lattice Quantum Chromodynamics
Michael L. Wagman, Frank Winter, Emmanuel Chang +5
Lattice quantum chromodynamics is used to constrain the interactions of two octet baryons at the SU(3) flavor-symmetric point, with quark masses that are heavier than those in natu…
Comment on "Are two nucleons bound in lattice QCD for heavy quark masses? - Sanity check with Lüscher's finite volume formula -"
Silas R. Beane, Emmanuel Chang, Zohreh Davoudi +8
In this comment, we address a number of erroneous discussions and conclusions presented in a recent preprint by the HALQCD collaboration, arXiv:1703.07210. In particular, we demons…
Double- Decay Matrix Elements from Lattice Quantum Chromodynamics
Brian C. Tiburzi, Michael L. Wagman, Frank Winter +6
A lattice quantum chromodynamics (LQCD) calculation of the nuclear matrix element relevant to the transition is described in detail, expanding…
The isotensor axial polarisability and lattice QCD input for nuclear double- decay phenomenology
Phiala E. Shanahan, Brian C. Tiburzi, Michael L. Wagman +6
The potential importance of short-distance nuclear effects in double- decay is assessed using a lattice QCD calculation of the transition and effective field…
Isovector charges of the nucleon from 2+1-flavor QCD with clover fermions
Boram Yoon, Yong-Chull Jang, Rajan Gupta +8
We present high-statistics estimates of the isovector charges of the nucleon from four 2+1-flavor ensembles generated using Wilson-clover fermions with stout smearing and tree-leve…
Axial-Current Matrix Elements in Light Nuclei from Lattice QCD
Martin J. Savage, Phiala E. Shanahan, Brian C. Tiburzi +7
I present results from the first lattice QCD calculations of axial-current matrix elements in light nuclei, performed by the NPLQCD collaboration. Precision calculations of these m…
Proton-proton fusion and tritium -decay from lattice quantum chromodynamics
Martin J. Savage, Phiala E. Shanahan, Brian C. Tiburzi +7
The nuclear matrix element determining the fusion cross section and the Gamow-Teller matrix element contributing to tritium -decay are calculated with lattice Qu…
Controlling Excited-State Contamination in Nucleon Matrix Elements
Boram Yoon, Rajan Gupta, Tanmoy Bhattacharya +10
We present a detailed analysis of methods to reduce statistical errors and excited-state contamination in the calculation of matrix elements of quark bilinear operators in nucleon…
A Framework for Lattice QCD Calculations on GPUs
F. T. Winter, M. A. Clark, R. G. Edwards +1
Computing platforms equipped with accelerators like GPUs have proven to provide great computational power. However, exploiting such platforms for existing scientific applications i…
Gauge Field Generation on Large-Scale GPU-Enabled Systems
Frank Winter
Over the past years GPUs have been successfully applied to the task of inverting the fermion matrix in lattice QCD calculations. Even strong scaling to capability-level supercomput…
Accelerating QDP++/Chroma on GPUs
Frank Winter
Extensions to the C++ implementation of the QCD Data Parallel Interface are provided enabling acceleration of expression evaluation on NVIDIA GPUs. Single expressions are off-loade…