# 22nd International Workshop on Weak Interactions and Neutrinos

Sep 14 – 19, 2009
Strada Passo dell'Acqua, 34 - 06134 Bosco PERUGIA, Italy
Europe/Rome timezone

## Explaining B -> K pi anomaly with non universal Z' boson

Not scheduled
15m
Strada Passo dell'Acqua, 34 - 06134 Bosco PERUGIA, Italy

#### Strada Passo dell'Acqua, 34 - 06134 Bosco PERUGIA, Italy

http://win09.lngs.infn.it

### Speaker

Dr Anjan Giri (National Institute of Technology, Rourkela, India)

### Description

We study the effect of non-universal Z' boson in the decay modes B -> K pi. In the standard model these modes receive dominant contributions from b -> s QCD penguins. Therefore, in this limit one expects $S_{\pi^0 K^0} \approx \sin 2 \beta$, $A_{\pi^0 K^0} \approx 0$ and $A_{\pi^0 K^-} \approx A_{\pi^+ K^-}$. The corrections due to the presence of small non-penguin contributions is found to yield $S_{\pi^0 K^0} > \sin 2 \beta$ and $\Delta A_{CP}(K \pi) \simeq 2.5 %$. However, the measured value of $S_{\pi^0 K^0}$ is less than $\sin 2 \beta$ and $\Delta A_{CP}(K \pi) \simeq 15 %$. We show the model with a non-universal Z' boson can successfully explain these anomalies

### Primary author

Dr Anjan Giri (National Institute of Technology, Rourkela, India)

### Presentation materials

There are no materials yet.