TY - JOUR
T1 - Twist-two matrix elements at finite and infinite volume
AU - Detmold, William
AU - Lin, Chi-Jen
PY - 2005/3/1
Y1 - 2005/3/1
N2 - We present one-loop results for the forward twist-two matrix elements relevant to the unpolarized, helicity and transversity baryon structure functions, in partially-quenched (Nf = 2 and Nf = 2 + 1) heavy baryon chiral perturbation theory. The full-QCD limit can be straightforwardly obtained from these results and we also consider SU(2/2) quenched QCD. Our calculations are performed in finite volume as well as in infinite-volume. We discuss features of lattice simulations and investigate finite volume effects in detail. We find that volume effects are not negligible, typically around 5%-10% in current partially-quenched and full-QCD calculations, and are possibly larger in quenched QCD. Extensions to the off-forward matrix elements and potential difficulties that occur there are also discussed.
AB - We present one-loop results for the forward twist-two matrix elements relevant to the unpolarized, helicity and transversity baryon structure functions, in partially-quenched (Nf = 2 and Nf = 2 + 1) heavy baryon chiral perturbation theory. The full-QCD limit can be straightforwardly obtained from these results and we also consider SU(2/2) quenched QCD. Our calculations are performed in finite volume as well as in infinite-volume. We discuss features of lattice simulations and investigate finite volume effects in detail. We find that volume effects are not negligible, typically around 5%-10% in current partially-quenched and full-QCD calculations, and are possibly larger in quenched QCD. Extensions to the off-forward matrix elements and potential difficulties that occur there are also discussed.
UR - http://www.scopus.com/inward/record.url?scp=18444409362&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.71.054510
DO - 10.1103/PhysRevD.71.054510
M3 - Article
AN - SCOPUS:18444409362
VL - 71
SP - 1
EP - 31
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
SN - 1550-7998
IS - 5
M1 - 054510
ER -