TY - JOUR
T1 - Progress in the determination of the [Formula Presented] cross section
AU - Durães, Francisco O.
AU - Kim, Hungchong
AU - Lee, Su Houng
AU - Navarra, Fernando S.
AU - Nielsen, Marina
PY - 2003
Y1 - 2003
N2 - Improving previous calculations, we compute the [Formula Presented] cross section using QCD sum rules. Our sum rules for the [Formula Presented] [Formula Presented] and [Formula Presented] hadronic matrix elements are constructed by using vacuum-pion correlation functions, and we work up to twist-4 in the soft-pion limit. Our results suggest that using meson exchange models is perfectly acceptable, provided that they include form factors and that they respect chiral symmetry. After evaluating a thermal average we get [Formula Presented] at [Formula Presented].
AB - Improving previous calculations, we compute the [Formula Presented] cross section using QCD sum rules. Our sum rules for the [Formula Presented] [Formula Presented] and [Formula Presented] hadronic matrix elements are constructed by using vacuum-pion correlation functions, and we work up to twist-4 in the soft-pion limit. Our results suggest that using meson exchange models is perfectly acceptable, provided that they include form factors and that they respect chiral symmetry. After evaluating a thermal average we get [Formula Presented] at [Formula Presented].
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U2 - 10.1103/PhysRevC.68.035208
DO - 10.1103/PhysRevC.68.035208
M3 - Article
AN - SCOPUS:85035307091
SN - 0556-2813
VL - 68
SP - 11
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
IS - 3
ER -