Excited-state spectroscopy of triply bottom baryons from lattice QCD
Abstract
Here, the spectrum of baryons containing three b quarks is calculated in nonperturbative QCD, using the lattice regularization. The energies of ten excited bbb states with JP = 1/2+, 3/2+, 5/2+, 7/2+, 1/2–, and 3/2– are determined with high precision. A domain-wall action is used for the up, down, and strange quarks, and the bottom quarks are implemented with nonrelativistic QCD. The computations are done at lattice spacings of a ≈ 0.11 fm and a ≈ 0.08 fm, and the results demonstrate the improvement of rotational symmetry as a is reduced. A large lattice volume of (2.7 fm)3 is used, and extrapolations of the bbb spectrum to realistic values of the light sea-quark masses are performed. All spin-dependent energy splittings are resolved with total uncertainties of order 1 MeV, and the dependence of these splittings on the couplings in the nonrelativistic QCD action is analyzed.
- Authors:
-
- College of William and Mary, Williamsburg, VA (United States)
- Publication Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1045829
- Alternate Identifier(s):
- OSTI ID: 1103650
- Report Number(s):
- JLAB-THY-12-1587; DOE/OR/23177-2209; arXiv:1202.1312
Journal ID: ISSN 1550-7998; PRVDAQ; TRN: US1203645
- Grant/Contract Number:
- AC05-06OR23177
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. D, Particles, Fields, Gravitation and Cosmology
- Additional Journal Information:
- Journal Volume: 85; Journal Issue: 11; Journal ID: ISSN 1550-7998
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCURACY; B QUARKS; BARYONS; QUANTUM CHROMODYNAMICS; QUARKS; SPECTROSCOPY; SYMMETRY
Citation Formats
Meinel, Stefan. Excited-state spectroscopy of triply bottom baryons from lattice QCD. United States: N. p., 2012.
Web. doi:10.1103/PhysRevD.85.114510.
Meinel, Stefan. Excited-state spectroscopy of triply bottom baryons from lattice QCD. United States. https://doi.org/10.1103/PhysRevD.85.114510
Meinel, Stefan. Mon .
"Excited-state spectroscopy of triply bottom baryons from lattice QCD". United States. https://doi.org/10.1103/PhysRevD.85.114510. https://www.osti.gov/servlets/purl/1045829.
@article{osti_1045829,
title = {Excited-state spectroscopy of triply bottom baryons from lattice QCD},
author = {Meinel, Stefan},
abstractNote = {Here, the spectrum of baryons containing three b quarks is calculated in nonperturbative QCD, using the lattice regularization. The energies of ten excited bbb states with JP = 1/2+, 3/2+, 5/2+, 7/2+, 1/2–, and 3/2– are determined with high precision. A domain-wall action is used for the up, down, and strange quarks, and the bottom quarks are implemented with nonrelativistic QCD. The computations are done at lattice spacings of a ≈ 0.11 fm and a ≈ 0.08 fm, and the results demonstrate the improvement of rotational symmetry as a is reduced. A large lattice volume of (2.7 fm)3 is used, and extrapolations of the bbb spectrum to realistic values of the light sea-quark masses are performed. All spin-dependent energy splittings are resolved with total uncertainties of order 1 MeV, and the dependence of these splittings on the couplings in the nonrelativistic QCD action is analyzed.},
doi = {10.1103/PhysRevD.85.114510},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
number = 11,
volume = 85,
place = {United States},
year = {Mon Jun 25 00:00:00 EDT 2012},
month = {Mon Jun 25 00:00:00 EDT 2012}
}
Web of Science
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