Axial couplings in heavy hadron chiral perturbation theory at the next-to-leading order

Journal Article · Tue Nov 01 04:00:00 EDT 2011 · Physical Review. D, Particles, Fields, Gravitation and Cosmology

DOI:https://doi.org/10.1103/PhysRevD.84.094502· OSTI ID:1029186

We present results for axial-current matrix elements between various heavy-meson and baryon states to the next-to- leading order in heavy hadron chiral perturbation theory in the p-regime. When compared with data from lattice simulations or experiments, these results can be used to determine the axial couplings in the chiral Lagrangian. Our calculation is performed in partially-quenched chiral perturbation theory for both SU(4|2) and SU(6|3) cases. We incorporate finite-size effects arising from a single Goldstone meson wrapping around the spatial volume. Results for full QCD with two and three flavours can be obtained straightforwardly by taking the sea-quark masses to be equal to the valence-quark masses. We also present one-loop results relevant to the heavy hadron strong-decay amplitudes involving final-state Goldstone bosons.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1029186
• Report Number(s): JLAB-THY-11-1412; DOE/OR/23177-1748; arXiv:1108.5594
• Journal Information: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Journal Name: Physical Review. D, Particles, Fields, Gravitation and Cosmology Journal Issue: 9 Vol. 84; ISSN PRVDAQ; ISSN 1550-7998
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
BARYONS
GOLDSTONE BOSONS
HADRONS
LAGRANGIAN FUNCTION
MATRIX ELEMENTS
MESONS
PERTURBATION THEORY
QUANTUM CHROMODYNAMICS