Notes on $B\to K^* γ$
| dc.creator | Becirevic, Damir | |
| dc.date | 1997-07-07 | |
| dc.date.accessioned | 2026-07-07T04:02:04Z | |
| dc.date.available | 2026-07-07T04:02:04Z | |
| dc.description | We analyzed two form factors $T_1(q^2)$ and $T_2(q^2)$ which enter the $B\to K^* \ell^+ \ell^-$ decay rate and are accessible in the lattice calculations for $B \to K^* γ$. The extrapolation to $q^2=0$, necessary for $B\to K^* γ$ is examined. The flat behavior of $T_2(q^2)$ is shown to be disfavored. From the double constrained unitarity bounds by the lattice result at small recoil and the light cone sum rule one at large recoil, the pole/double pole fit is preferred with the `pole' masses as free parameters. We also show a consistency of two approaches in the heavy quark limit. Besides several byproducts of this analysis, our final (conservative) result for the form factor that determines $B\to K^* γ$ rate is $T(0)=0.15\pm 0.04$. | |
| dc.description | 27 pages latex2e file, 6 Postscript figures | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9707271 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9707271 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/47078 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Notes on $B\to K^* γ$ | |
| dc.type | text |