CERN Accelerating science

LHCb Note
Report number	LHCb-CONF-2015-001 ; CERN-LHCb-CONF-2015-001
Title	Study of the decay $B^+ \rightarrow K^+\pi^0$ at LHCb
Corporate author(s)	The LHCb Collaboration
Collaboration	LHCb Collaboration
Submitted to	50th Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 14 - 21 Mar 2015
Submitted by	[email protected] on 12 Feb 2015
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; LHCb
Free keywords	flavour physics ; B physics ; calorimeter ; trigger
Abstract	This analysis investigates the capability of LHCb to study the decay mode $B^+ \rightarrow K^+\pi^0$. This serves as a prototype analysis for decay channels with similar topologies, such as the $B^0 \rightarrow K^0\pi^0$, the $\Lambda_b \rightarrow \Lambda^0\gamma$, and the $B^0 \rightarrow K^0\pi^0\gamma$ decays, which involve photons in the final state and lack a reconstructed decay vertex. There is significant interest in these channels due to their sensitivity to effects of physics beyond the standard model. The proton-proton collision data set collected in 2011-2012, corresponding to $3.0~\text{fb}^{-1}$ of integrated luminosity, is studied. An analysis strategy is developed to mitigate the effects of low trigger efficiency and large combinatorial background leading to the reconstruction of $72\pm26$ signal events with a statistical significance of $3.7\sigma.$ Based on the findings of this study, a dedicated software trigger is being developed for use in the next data-taking period scheduled for later this year, when the LHC centre-of-mass energy will be increased.
Copyright/License	Preprint: (License: CC-BY-4.0)
Related	superseded by: CERN-EP-2020-242

Corresponding record in: Inspire
Email contact(s) : [email protected] ; [email protected] ; [email protected]