# IOP 2014 Joint HEPP & APP Group Meeting

Apr 7 – 9, 2014
Royal Holloway, University of London
Europe/London timezone
Institute of Physics 2014 Joint High Energy Particle Physics and Astro Particle Physics Groups Annual Meeting

## Charmless three body decays at LHCb

Apr 8, 2014, 4:30 PM
15m
Room B (Windsor Building)

### Room B

#### Windsor Building

contributed talk Flavour Physics and Beyond

### Speaker

Rafael Silva Coutinho (University of Warwick (GB))

### Description

The study of charmless three body decays with final states including a $K^{0}$ meson has an extensive number of application. In this talk a review of the recent and ongoing analyses at LHCb will be reported. First, a search for previously unobserved decays of beauty baryons to the final states $K^{0}_{\mathrm{S}}p\pi^{-}$ and $K^{0}_{\mathrm{S}}pK^{-}$ is reported. The analysis is based on a data sample corresponding to an integrated luminosity of $1.0$ fb$^{-1}$ of pp collisions. The $\Lambda^{0}_{b} \rightarrow K^{0}_{\mathrm{S}}p\pi^{-}$ decay is observed for the first time with a significance of 8.6$\,\sigma$, and a measurement is made of the $CP$ asymmetry, which is consistent with zero. Moreover, with the recent measurement of branching fractions of the $B^{0}_{(s)} \rightarrow K^{0}_{\mathrm{S}}h^{+}h^{‘-}$ decay modes ($h^{(′)} = \pi, K$) with 2011 data, a number of developments have been performed towards the analysis of the full dataset. In particular, the details considering a time integrated untagged Dalitz plot analysis will be described.

### Primary author

Rafael Silva Coutinho (University of Warwick (GB))

 Slides