TY  - JOUR
AU  - Li, X. Q.
AU  - Yang, Y. D.
AU  - Yuan, X. B.
PY  - 2011
DA  - 2011//
TI  - Anomalous (t q photon) coupling effects in exclusive radiative B-meson decays
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 075
EP  - 22pp
VL  - 08
IS  - 8
PB  - Springer
KW  - Beyond Standard Model
KW  - B-Physics
AB  - The top-quark FCNC processes will be searched for at the CERN LHC, which are correlated with the B-meson decays. In this paper, we study the e ff ects of top-quark anomalous interactions tq gamma in the exclusive radiative B --> K*gamma and B --> rho gamma decays. With the current experimental data of the branching ratios, the direct CP and the isospin asymmetries, bounds on the coupling kappa(gamma)(tcR) from B --> K*gamma and kappa(gamma)(tuR) from B --> rho gamma decays are derived, respectively. The bound on vertical bar kappa(gamma)(tcR)vertical bar from B (B --> K*gamma) is generally compatible with that from B (B --> X(s)gamma). However, the isospin asymmetry Delta (K*gamma) further restrict the phase of kappa(gamma)(tuR), and the combined bound results in the upper limit, B (t --> c gamma) < 0 : 21%, which is lower than the CDF result. For real kappa(gamma)(tuR), the upper bound on B (t --> c gamma) is about of the same order as the 5 sigma discovery potential of ATLAS with an integrated luminosity of 10 fb(-1). For B --> rho gamma decays, the NP contribution is enhanced by a large CKM factor vertical bar V(ud)/V(td)vertical bar, and the constraint on tu gamma coupling is rather restrictive, B (t --> u gamma) < 1 : 44 x 10(-5). With re fi ned measurements to be available at the LHCb and the future super-B factories, we can get close correlations between B --> V gamma and the rare t --> q gamma decays, which will be studied directly at the LHC ATLAS and CMS.
SN  - 1126-6708
UR  - http://arxiv.org/abs/1105.0364
UR  - https://doi.org/10.1007/JHEP08(2011)075
DO  - 10.1007/JHEP08(2011)075
LA  - English
N1  - WOS:000294901400007
ID  - Li_etal2011
ER  -