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Title: Nucleon transverse momentum-dependent parton distributions from domain wall fermion calculations at 297 MeV pion mass

Here, lattice QCD calculations of transverse momentum-dependent parton distributions (TMDs) in a nucleon are performed based on a definition of TMDs via hadronic matrix elements of quark bilocal operators containing staple-shaped gauge connections. A parametrization of the matrix elements in terms of invariant amplitudes serves to cast them in the Lorentz frame preferred for the lattice calculation. Using a RBC/UKQCD domain wall fermion ensemble corresponding to a pion mass of 297 MeV, on a lattice with spacing 0.084 fm, selected TMD observables are accessed and compared to previous exploration at heavier pion masses on coarser lattices.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [2] ;  [4] ;  [4] ;  [2] ;  [5] ;  [3]
  1. New Mexico State Univ., Las Cruces, NM (United States)
  2. Univ. Regensburg, Regensburg (Germany)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  5. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
OSTI Identifier:
1240435
Report Number(s):
LA-UR--14-29420
Journal ID: ISSN 1824-8039
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
PoS Proceedings of Science
Additional Journal Information:
Journal Volume: 167; Conference: 32. International Symposium on Lattice Field Theory, New York, NY (United States), 23-28 Jun 2014; Journal ID: ISSN 1824-8039
Publisher:
SISSA
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS