Spectroscopy of doubly and triply-charmed baryons from lattice QCD

Conference · Fri Nov 01 00:00:00 EDT 2013 · Proceedings of Science

OSTI ID:1156886

Padmanath, M. ^[1]; Edwards, Robert G. ^[2]; Mathur, Nilmani ^[1]; Peardon, Michael ^[3]

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1. Tata Institute
2. JLAB
3. Trinity College, Dublin

We present the ground and excited state spectra of doubly and triply-charmed baryons by using lattice QCD with dynamical clover fermions. A large set of baryonic operators that respect the symmetries of the lattice and are obtained after subduction from their continuum analogues are utilized. Using novel computational techniques correlation functions of these operators are generated and the variational method is exploited to extract excited states. The lattice spectra that we obtain have baryonic states with well-defined total spins up to 7/2 and the low lying states remarkably resemble the expectations of quantum numbers from SU(6) Ⓧ O(3) symmetry. Various energy splittings between the extracted states, including splittings due to hyperfine as well as spin-orbit coupling, are considered and those are also compared against similar energy splittings at other quark masses. Using those splittings for doubly-charmed baryons, and taking input of experimental Bc meson mass, we predict the mass splittings of B*c-Bc to be about 80 ± 8 MeV and mΩccb=8050±10 MeV.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1156886
• Report Number(s): JLAB-THY-14-1836; DOE/OR/23177-2963; arXiv:1311.4354
• Journal Information: Proceedings of Science, Vol. Lattice2013; Conference: Lattice 2013, 29 July - 3 August 2013, Mainz, Germany
• Country of Publication: United States
• Language: English