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1. chinaXiv:201709.00038 [pdf]

EXCITED HEAVY MESONS FROM QCD SUM RULES

Chun Liu
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

Orbitally excited L = 1 charm mesons are studied by QCD sum rules in the framework of heavy quark effective theory. The meson masses and the strong decay widths are obtained. This talk is based on our works of refs. 1 and 2 collaborated with Y.B. Dai, C.S. Huang, M.Q. Huang and H.Y. Jin.

submitted time 2017-09-17 Hits845Downloads450 Comment 0

2. chinaXiv:201711.00008 [pdf]

1/Nc Expansion of the Heavy Baryon Isgur-Wise Functions

Chun Liu
Subjects: Physics >> The Physics of Elementary Particles and Fields

The 1/Nc expansion of the heavy baryon Isgur-Wise functions is discussed.Because of the contracted SU(2Nf ) light quark spin-flavor symmetry, the universality relations among the Isgur-Wise functions of b ! #3;c and #6;(?) b ! #6;(?)c are valid up to the order of 1/N2 c .

submitted time 2017-09-17 Hits1596Downloads863 Comment 0

3. chinaXiv:201709.00039 [pdf]

Some Remarks on the Baryon-Meson Couplings in the 1/Nc Expansion

Chun Liu
Subjects: Physics >> The Physics of Elementary Particles and Fields

The original results for the baryon-pion couplings in the large Nc QCD can be understood in a simpler way in the Hartree-Fock picture. The large Nc relation and its 1/Nc correction between the heavy baryon- meson coupling and the light baryon-meson coupling are emphasized.Application to the baryon-ρ meson interactions is straightforward. The implications of recent experimental result for the strong coupling con-stants of the heavy baryon chiral lagrangian are discussed.

submitted time 2017-09-17 Hits1664Downloads898 Comment 0

4. chinaXiv:201709.00041 [pdf]

Heavy Baryon Masses in Large Nc HQET

Chun Liu
Subjects: Physics >> The Physics of Elementary Particles and Fields

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.

submitted time 2017-09-17 Hits1484Downloads810 Comment 0

5. chinaXiv:201709.00043 [pdf]

Phenomenology of A Supersymmetric Model for Fermion Mass Hierarchy

Chun Liu
Subjects: Physics >> The Physics of Elementary Particles and Fields

Some phenomenological aspects of a supersymmetric model for fermion mass hierarchy proposed previously are discussed. It is required that the lepton universality violation is near to its current experimental bound. The lepton number violation decay modes τ → 2eμ and 3μ maybe observable in the near future. The Majorana mass of electron-neutrino is predicted to be about 0.1 eV. The fine-tuning problem is discussed.

submitted time 2017-09-17 Hits1415Downloads775 Comment 0

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