scholarly journals RADIATIVE LEPTONIC DECAYS OF THE CHARGED B AND D MESONS INCLUDING LONG-DISTANCE CONTRIBUTION

2012 ◽  
Vol 27 (22) ◽  
pp. 1250120 ◽  
Author(s):  
JI-CHONG YANG ◽  
MAO-ZHI YANG
Keyword(s):  
Short Distance ◽  
D Mesons ◽  
Bound State ◽  
Vector Meson Dominance ◽  
Dominance Model ◽  
Long Distance ◽  
Leptonic Decays ◽  
Bound State Wave Function ◽  
Vector Meson Dominance Model ◽  
Relativistic Potential

In this work, we study the radiative leptonic decays of B-, D-and [Formula: see text], including both the short-distance and long-distance contributions. The short-distance contribution is calculated by using the relativistic quark model, where the bound state wave function we used is that obtained in the relativistic potential model. The long-distance contribution is estimated by using vector meson dominance model.

scholarly journals Estimate of the Long-Distance Contribution Through b→ sψ to the Bs→γγ Decay Rate

1997 ◽  
Vol 12 (37) ◽  
pp. 2837-2846 ◽  
Author(s):  
G. Hiller ◽  
E. O. Iltan
Keyword(s):  
Vector Meson ◽  
Decay Rate ◽  
Charm Quark ◽  
Branching Ratio ◽  
Vector Meson Dominance ◽  
Chain Process ◽  
Quark Loop ◽  
Dominance Model ◽  
Long Distance ◽  
Vector Meson Dominance Model

The Bs→ϕψ decay is modeled through the inclusive b→ sψ decay. Using the vector meson dominance model, the amplitude for the chain process Bs→ϕ;ψ→ϕγ→γγ is estimated and it is found to be at most 4% of the corresponding amplitude from the O7 type LD contribution. The intermediate amplitude for the process Bs→ϕγ is compared with the corresponding one obtained by a different approach based on the interaction of the virtual charm quark loop with soft gluons.7 Both amplitudes are found to agree within 10%. Further the influence on the branching ratio B (Bs→γγ) SD + LD O7 from inclusive b→ sψ is estimated to be less than 1%.

scholarly journals f1(1285) → e+e- decay and direct f1 production in e+e- collisions

2018 ◽  
Vol 182 ◽  
pp. 02106
Author(s):  
A.S. Rudenko
Keyword(s):  
Vector Meson ◽  
Cross Section ◽  
Relative Phase ◽  
Charge Asymmetry ◽  
Coupling Constants ◽  
Vector Meson Dominance ◽  
Dominance Model ◽  
Vector Meson Dominance Model

The width of the f1(1285) → e+e+e- decay is calculated in the vector meson dominance model. The result depends on the relative phase between two coupling constants describing f1 → ρ0γ decay. The width Γ( f1 → e+e+e-) is estimated to be ≃ 0:07 - 0:19 eV. Direct f1 production in e+e+e- collisions is discussed, and the e+e+e- → f1 → a0π → ηππ cross section is calculated. Charge asymmetry in the e+e+e- → ηπ+π- reaction due to interference between e+e+e- → f1 and e+e+e- → ηρ0 amplitudes is studied.

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