Heavy baryon spectroscopy from the lattice
- Department of Physics and Astronomy, The University of Edinburgh, Edinburgh EH9 3JZ (Scotland)
- Physics Department, The University, Southampton SO17 1BJ (United Kingdom)
The results of an exploratory lattice study of heavy baryon spectroscopy are presented. We have computed the full spectrum of the eight baryons containing a single heavy quark, on a 24{sup 3}{times}48 lattice at {beta}=6.2, using an {ital O}({ital a})-improved fermion action. We discuss the lattice baryon operators and give a method for isolating the contributions of the spin doublets ({Sigma},{Sigma}{sup {asterisk}}), ({Xi}{sup {prime}},{Xi}{sup {asterisk}}), and ({Omega},{Omega}{sup {asterisk}}) to the correlation function of the relevant operator. We compare our results with the available experimental data and find good agreement in both the charm and the {ital b}-quark sectors, despite the long extrapolation in the heavy quark mass needed in the latter case. We also predict the masses of several undiscovered baryons. We compute the {Lambda}-pseudoscalar meson and {Sigma}-{Lambda} mass splittings. Our results, which have errors in the range 10{endash}30{percent}, are in good agreement with the experimental numbers. For the {Sigma}{sup {asterisk}}-{Sigma} mass splitting, we find results considerably smaller than the experimental values for both the charm and the {ital b}-flavored baryons, although in the latter case the experimental results are still preliminary. This is also the case for the lattice results for the hyperfine splitting for the heavy mesons. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 383414
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 5 Vol. 54; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Heavy baryon masses in the 1/{ital m}{sub {ital Q}} and 1/{ital N}{sub {ital c}} expansions
Update of heavy baryon mass predictions
Two-body Cabibbo-suppressed decays of charmed baryons into vector mesons and into photons
Journal Article
·
Tue Oct 01 00:00:00 EDT 1996
· Physical Review, D
·
OSTI ID:383929
Update of heavy baryon mass predictions
Journal Article
·
Tue Dec 31 23:00:00 EST 1996
· Physical Review, D
·
OSTI ID:475306
Two-body Cabibbo-suppressed decays of charmed baryons into vector mesons and into photons
Journal Article
·
Mon Jul 01 00:00:00 EDT 1996
· Physical Review, D
·
OSTI ID:285821