[Theory-seminars] Theory Seminar TODAY. Ishara Fernando. Room L102. 1pm

[Cesar Fernandez-Ramirez]

Theory Center Seminar
Monday, November 24, 2014
1:00 p.m. 
CEBAF Center, Room L102

Speaker: Ishara Fernando (JLab and Hampton U)

Title: Baryon spin-flavor structure from an analysis of lattice QCD results of
the baryon spectrum

Abstract: The known classification of excited baryons based on the dynamical
symmetry group SU(6)x O(3) can be understood in the framework of the 1/N_c
expansion. The application to masses based on the experimentally
determined masses can now be extended to the case of baryon masses
obtained in lattice QCD. The work to be presented analyses the ground
state as well as the excited multiplets [70,1^-],[56,0^+] and [56,2^+].
Mass relations which are valid up to corrections 1/N_c^2, or
$\frac{1}{N_c}(m_s-m_{u,d})$,or $(m_s-m_{u,d})^2$ are tested and
conclusions on quark mass dependence of the effective mass operators and
minimal sets of effective mass operators are obtained.
-- 
César Fernández-Ramírez

Theory Center -- Jefferson Lab
12000 Jefferson Ave., Newport News, VA 23606, USA

Phone: (+1) 757-269-7844
Fax: (+1) 757-269-7002
E-mail: cesar at jlab.org