Published February 1, 2008
| Version v1
Journal article
Gluon contributions to the pion mass and light-cone-momentum fraction
Creators
- 1. Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
Description
We calculate the matrix elements of the gluonic contributions to the energy-momentum tensor for a pion of mass 600<Mπ<1100 MeV in quenched lattice QCD. We find that gluons contribute (37±8±12)% of the pion's light-cone momentum. The bare matrix elements corresponding to the trace anomaly contribution to the pion mass are also obtained. The discretizations of the energy-momentum tensor we use have other promising applications, ranging from calculating the origin of hadron spin to QCD thermodynamics
Additional details
Identifiers
- DOI
- 10.1103/PhysRevD.77.037501;
- arXiv
- arXiv:0707.3225v1;
Publishing Information
- Journal Title
- Physical Review. D, Particles Fields
- Journal Volume
- 77
- Journal Issue
- 3
- Journal Page Range
- p. 037501-037501.4
- ISSN
- 0556-2821
- CODEN
- PRVDAQ
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 39059069
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- ENERGY-MOMENTUM TENSOR; GLUONS; LATTICE FIELD THEORY; LIGHT CONE; MATRIX ELEMENTS; MEV RANGE; PIONS; QUANTUM CHROMODYNAMICS; REST MASS; SPIN; THERMODYNAMICS
- Descriptors DEC
- ANGULAR MOMENTUM; BOSONS; CONSTRUCTIVE FIELD THEORY; ELEMENTARY PARTICLES; ENERGY RANGE; FIELD THEORIES; HADRONS; MASS; MESONS; PARTICLE PROPERTIES; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; SPACE-TIME; TENSORS
Optional Information
- Notes
- (c) 2008 The American Physical Society