Quenched chiral perturbation theory for heavy-light mesons

Journal Article · Wed May 01 04:00:00 EDT 1996 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.53.5125· OSTI ID:286055

Sharpe, S R; Zhang, Y ^[1]

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1. Department of Physics, University of Washington, Seattle, Washington 98195 (United States)

We formulate quenched chiral perturbation theory for heavy-light mesons coupled to pions, and calculate the one-loop chiral logarithmic corrections to {ital f}{sub {ital B}}, {ital f}{sub {ital B}{sub {ital s}}}, {ital B}{sub {ital B}}, and {ital B}{sub {ital B}{sub {ital s}}}. We also calculate these corrections for {open_quote}{open_quote}partially quenched{close_quote}{close_quote} theories. In both theories, the chiral logarithms diverge in the chiral limit, indicating that (partially) quenched theories should not be used to study this limit. Comparing the chiral logarithms to those in QCD, we estimate the errors caused by (partial) quenching. By forming suitable ratios, we can reduce the uncertainties in our estimates. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Massachusetts Institute of Technology
• DOE Contract Number: AC02-76ER03069; AC03-76SF00515
• OSTI ID: 286055
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 9 Vol. 53; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CHIRAL SYMMETRY
CORRECTIONS
MESONS
PERTURBATION THEORY
PIONS
QUANTUM CHROMODYNAMICS
QUENCHING