Radiative and Electroweak B Decays at the LHC

S De Capua

doi:10.1016/j.nuclphysbps.2007.05.043

Abstract

Rare loop-induced decays are sensitive to new physics in many Standard Model extensions. In this paper we discuss the potential of the LHC experiments to study the radiative penguin decays b → s γ and the electroweak penguin decays b → ℓ ℓ s . The experimental strategies are presented.

Highlights

The Standard Model (SM) is successful in explaining almost all experimental results of elementary particle physics, it is possible that physics beyond the SM exists just above the presently available energy scale
In this paper we will focus on the flavor-changing neutral currents (FCNCs) b → s processes, which are forbidden in the Standard Model at the tree level and can proceed only via loop diagrams
Studies of the rare radiative penguin decays b → sγ and the electroweak penguin decay b → s could allow an extraction of information sensitive to new physics in many SM extensions

Summary

INTRODUCTION

The Standard Model (SM) is successful in explaining almost all experimental results of elementary particle physics, it is possible that physics beyond the SM exists just above the presently available energy scale. If additional diagrams with non-SM particles contribute to these processes, the decay rate and other properties are modified Such contributions may change the Wilson coefficients that parametrize the strength of the short distance interactions [1]. The LHC will be a copious source of B mesons, due to the expected high bb cross section of ∼ 500 μb This potential will be exploited by the ATLAS, CMS and LHCb experiments. Suppl.) 170 (2007) 214–219 tral spectrometers and they have been designed primarly for new physics searches at high luminosity [13,14] They have the capabilities to realise a rich and competitive programme dedicated to B physics [15] for decays involving muons during the initial running at lower luminosity and especially the ATLAS collaboration has recently reported results of various studies dedicated to B physics.

RADIATIVE RARE DECAYS AT THE LHC

FORWARD-BACKWARD ASYMMETRY

RK MEASUREMENTS AT LHCb

Findings

CONCLUSIONS