EXCITED HEAVY BARYON MASSES FROM THE 1/Nc EXPANSION OF HQET
نویسندگان
چکیده
The mass spectra of the L = 1 orbitally excited heavy baryons with light quarks in both the spin-flavor symmetric and the mixed representations are studied by the 1/Nc expansion method in the framework of the heavy quark effective theory. The mixing effect between the baryons in the two representations is also considered. The general pattern of the spectrum is predicted which will be verified by the experiments in the near future.
منابع مشابه
Heavy Baryon Masses in Large Nc HQET
We argue that in the large Nc HQET, the masses of the s-wave lowspin heavy baryons equal to the heavy quark mass plus proton mass approximately. To the subleading order, the heavy baryon mass 1/Nc expansion not only has the same form, but also has the same coefficients as that of the light baryon. Based on this, numerical analysis is made. PACS: 11.15.Pg, 12.39.Hg, 14.20.-c.
متن کامل1/mQ and 1/Nc Expansions for Excited Heavy Baryons with Light Quarks in the Spin-Flavor Symmetric Representation
The mass spectrum of the L = 1 orbitally excited heavy baryons with light quarks in the spin-flavor symmetric representation is studied by the 1/Nc expansion method in the framework of the heavy quark effective theory. The mixing effect from the baryons in the mixed representation is considered. The general pattern of the spectrum is predicted which will be verified by the experiments in the ne...
متن کاملCharm and bottom baryon masses in the 1/N expansion
The 1/Nc expansion has proven useful for studying the spin-flavor properties of baryons containing light quarks. A spin-flavor symmetry for baryons is defined in large-Nc QCD. Away from the Nc → ∞ limit, 1/Nc corrections which break large-Nc baryon spin-flavor symmetry can be classified in terms of the spin and flavor symmetries which remain for finite Nc. Since explicit SU(3) flavor symmetry b...
متن کاملBaryon Masses in the 1/n C Expansion
The masses of baryons and heavy quark baryons are studied analytically in an expansion in 1/Nc, SU (3) flavor symmetry breaking, and heavy-quark symmetry breaking. The measured baryon masses are in striking agreement with the 1/Nc hierarchy.
متن کاملExcited heavy baryon spectrum in large N c heavy quark effective theory
L = 1 excited heavy baryon masses are analyzed by heavy quark and large Nc expansions. In heavy quark limit, mass is parameterized by Λ̄ and it is expanded further by spin-flavor breaking operators to the zeroth order of 1/Nc. Expanding coefficients will be fixed by more data on the excited baryons in the near future. Typeset using REVTEX Email address: [email protected] Email address: liuc@c...
متن کامل