skip to main content

SciTech ConnectSciTech Connect

Title: Charmed bottom baryon spectroscopy from lattice QCD

In this study, we calculate the masses of baryons containing one, two, or three heavy quarks using lattice QCD. We consider all possible combinations of charm and bottom quarks, and compute a total of 36 different states with JP = 1/2+ and JP = 3/2+. We use domain-wall fermions for the up, down, and strange quarks, a relativistic heavy-quark action for the charm quarks, and nonrelativistic QCD for the bottom quarks. Our analysis includes results from two different lattice spacings and seven different pion masses. We perform extrapolations of the baryon masses to the continuum limit and to the physical pion mass using SU(4|2) heavy-hadron chiral perturbation theory including 1/mQ and finite-volume effects. For the 14 singly heavy baryons that have already been observed, our results agree with the experimental values within the uncertainties. We compare our predictions for the hitherto unobserved states with other lattice calculations and quark-model studies.
 [1] ;  [2] ;  [3] ;  [1]
  1. College of William and Mary, Williamsburg, VA (United States); Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Univ. of Arizona, Tuscon, AZ (United States); Brookhaven National Lab., Upton, NY (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
JLAB-THY--14-1950; arXiv:1409.0497; DOE/OR/23177--3177
Journal ID: ISSN 1550-7998; PRVDAQ; ArticleNumber: 094507
Grant/Contract Number:
FG02-94ER40818; FG02-04ER41302; AC05-06OR23177; AC02-05CH11231; OCI-1053575; SC0010495
Accepted Manuscript
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 90; Journal Issue: 9; Journal ID: ISSN 1550-7998
American Physical Society (APS)
Research Org:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States