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Title: Sea quark transverse momentum distributions and dynamical chiral symmetry breaking

Recent theoretical studies have provided new insight into the intrinsic transverse momentum distributions of valence and sea quarks in the nucleon at a low scale. The valence quark transverse momentum distributions (q - qbar) are governed by the nucleon's inverse hadronic size R{sup -1} ~ 0.2 GeV and drop steeply at large p{sub T}. The sea quark distributions (qbar) are in large part generated by non-perturbative chiral-symmetry breaking interactions and extend up to the scale rho{sup -1} ~ 0.6 GeV. These findings have many implications for modeling the initial conditions of perturbative QCD evolution of TMD distributions (starting scale, shape of p{sub T}. distributions, coordinate-space correlation functions). The qualitative difference between valence and sea quark intrinsic p{sub T}. distributions could be observed experimentally, by comparing the transverse momentum distributions of selected hadrons in semi-inclusive deep-inelastic scattering, or those of dileptons produced in pp and pbar-p scattering.
 [1] ;  [2] ;  [3]
  1. Univ. of Connecticut, Storrs, CT (United States)
  2. Penn State Univ., State College, PA (United States)
  3. JLAB Newport News, VA (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
JLAB-THY-13-1785; DOE/OR-23177-2730
Journal ID: ISSN 2010-1945; arXiv:1309.2990; TRN: US1400151
DOE Contract Number:
Resource Type:
Resource Relation:
Journal Name: International Journal of Modern Physics: Conference Series; Journal Volume: 25; Conference: QCD Evolution Workshop, Newport News, VA (United States), 6-10 May 2013
World Scientific
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Transverse momentum distributions; dynamical chiral symmetry breaking; semi–inclusive deep–inelastic scattering; Drell–Yan pair production