Two body non-leptonic decays of B and Bs mesons

Abstract

We perform an analysis of two-body non-leptonic decays of B and Bs mesons in the factorization approximation. We make use of the semileptonic decay amplitudes previously calculated on the basis of an effective lagrangian satisfying chiral and heavy quark symmetries and including spin 1 resonances. Exclusive semileptonic D-decay data are used as experimental input. Our results compare favorably with data, whenever they are available, and indicate a positive value for the ratio of non-leptonic coefficients a2a1, similarly to previous studies

Exclusive nonleptonic decays ofBmesons

“…The closest experimental upper limit to the theoretical predictions is for the decayB 0 → π + π − . It is approximately two times larger than our prediction and is very close to the result of [27]. …”

“…It is important to note that the form factors A 1 and F 0 in (29), (28) have a different q 2 dependence than the other form factors (27), (30), (31). In quark models one usually assumes a pole [21] or exponential [22] q 2 behaviour for all form factors.…”

ρ-ωMixing and DirectCPViolation in HadronicGardner1, O'Connell2, Thomas3 1998Phys. Rev. Lett.

“…r 6 p 1 p 2 in the vicinity of the v resonance is predicted to be more than 20% that of the summed decay rates with a branching ratio ͑B 6 ! r 6 r 0 ͒ of more than 10 25 [4,13,14]. Interfering resonances can generally both constrain and enhance the strong phase [15].…”

Search for exclusive charmless hadronicBdecays

“…Our sensitivity is at the level of Standard Model predictions for the modes π + π − , K + π − , π + π 0 , K + π 0 , π ± ρ ∓ , K + φ, and K * 0 φ. Results from the likelihood analyses: the signal yield central value from the fit (N S ), detection efficiencies (E), the 90% confidence level upper limit on the number of signal events (N UL ), the 90% CL upper limit of the branching fraction (UL B), and the theoretical predictions for the branching fractions [26][27][28]. We also include the measured branching fraction (B) for the sum of π + π − and K + π − , where the first error is statistical, the second is the systematic error from the yield, and the third is the systematic error from the efficiency.…”