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

Journal Article · Mon Jun 23 00:00:00 EDT 2014 · PoS Proceedings of Science

OSTI ID:1240435

Engelhardt, M. ^[1]; Musch, B. ^[2]; Bhattacharya, T. ^[3]; Gupta, R. ^[3]; Hagler, P. ^[2]; Negele, J. ^[4]; Pochinsky, A. ^[4]; Schafer, A. ^[2]; Syritsyn, S. ^[5]; Yoon, B. ^[3]

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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)

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.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC52-06NA25396
• OSTI ID: 1240435
• Report Number(s): LA-UR--14-29420
• Journal Information: PoS Proceedings of Science, Journal Name: PoS Proceedings of Science Vol. 167; ISSN 1824-8039
• Publisher: SISSA
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS