Status of Average-x from Lattice QCD

Conference · Thu Sep 01 00:00:00 EDT 2011

DOI:https://doi.org/10.1063/1.3631515· OSTI ID:1028710

Renner, Dru

As algorithms and computing power have advanced, lattice QCD has become a precision technique for many QCD observables. However, the calculation of nucleon matrix elements remains an open challenge. I summarize the status of the lattice effort by examining one observable that has come to represent this challenge, average-x: the fraction of the nucleon's momentum carried by its quark constituents. Recent results confirm a long standing tendency to overshoot the experimentally measured value. Understanding this puzzle is essential to not only the lattice calculation of nucleon properties but also the broader effort to determine hadron structure from QCD.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1028710
• Report Number(s): JLAB-THY-11-1331; DOE/OR/23177-1505; arXiv:1103.3655; TRN: US1105601
• Resource Relation: Conference: HiX2010, 13-15 Oct 2010, Newport News, Virginia
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCURACY
ALGORITHMS
DATA
HADRONS
LATTICE FIELD THEORY
MATRIX ELEMENTS
NUCLEONS
PARTICLE STRUCTURE
QUANTUM CHROMODYNAMICS
QUARKS