Light-front heavy-quark effective theory and heavy-meson bound states

Journal Article · Fri Sep 01 04:00:00 EDT 1995 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.52.2915· OSTI ID:115936

Cheung, C; Zhang, W ^[1]; Lin, G ^[2]

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1. Institute of Physics, Academia Sinica, Taipei 11529,Taiwan (Taiwan, Province of China)
2. Institute of Physics, National Chiao-Tung University, Hsinchu 30050, Taiwan (Taiwan, Province of China)

The heavy-quark effective theory is developed on the light front. Based on this effective theory, a light-front heavy-meson bound state with definite spin and parity is constructed. Within the effective theory, the Isgur-Wise function is derived in terms of the asymptotic light-front bound state amplitudes in the limit {ital m}{sub {ital Q}}{r_arrow}{infinity}; the result is a general expression for arbitrary recoil velocities. With the asymptotic form of the BSW amplitudes, the Isgur-Wise function is given by {xi}({ital v}{center_dot}{ital v}{prime})=1/{ital v}{center_dot}{ital v}{prime}. The slope at the zero-recoil point is {rho}{sup 2}={minus}{xi}{prime}(1)=1, in excellent agreement with the recent CLEO result of {rho}{sup 2}=1.01{plus_minus}0.15{plus_minus}0.09.

• OSTI ID: 115936
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 5 Vol. 52; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
AMPLITUDES
BOUND STATE
LIGHT CONE
MESONS
PARITY
QUANTUM CHROMODYNAMICS
QUARKS
SPIN