https://doi.org/10.1140/epjc/s2004-01995-9
theoretical physics
An analysis of 
decays using a global fit in QCD factorization
1
Department of Physics, University of Regina, SK, S4S 0A2, Canada
2
Department of Physics, Yonsei University, 120-479, Seoul, Korea
3
Theory Group, KEK, 305-0801, Tsukuba, Ibaraki, Japan
* e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Abstract
In the framework of QCD factorization, we study 
decays. In order to more reliably determine the phenomenological parameters X
H and X
A arising from end-point divergences in the hard spectator scattering and weak annihilation contributions, we use the global analysis for twelve 
and VP decay modes, such as 
, 
, 
, 
, et cetera, but excluding the modes whose (dominant) internal quark-level process is 
. Based on the global analysis, we critically investigate possible magnitudes of X
H,A and find that both large and small X
H,A terms are allowed by the global fit. In the case of the large X
H,A effects, the standard model (SM) prediction of the branching ratios (BRs) for is large and well consistent with the experimental results. In contrast, in the case of the small X
H,A effects, the SM prediction for these BRs is smaller than the experimental data. Motivated by the recent Belle measurement of 
through 
, if we take into account possible new physics effects on the quark-level process , we can explicitly show that these large BRs can be understood even in the small X
H,A case. Specifically, we present two new physics scenarios: R-parity violating SUSY and R-parity conserving SUSY.
© Springer-Verlag, 2004
