Searches for very rare decays to purely leptonic final states at LHCb

TL;DR

This paper reviews LHCb's searches for extremely rare leptonic decays, which are sensitive to new physics beyond the Standard Model, using 1.0 fb-1 of data at 7 TeV.

Contribution

It provides the latest experimental results on rare muonic and lepton flavor violating decays from LHCb, highlighting their potential to reveal new physics.

Findings

No significant excess observed in decay rates.

Limits set on branching fractions of rare decays.

Results constrain extended models of particle physics.

Abstract

We present a review of the searches for very rare decays to muonic final states performed at LHCb using 1.0 fb-1 of pp collisions at 7 TeV centre of mass energy. Flavour changing neutral current processes, such as B->mumu and B->mumumumu are highly suppressed in the Standard Model (SM). Such decays therefore allow contributions from new processes or new heavy particles to significantly modify the expected SM rates. Charged lepton flavour violating processes, such as the neutrino-less tau->mumumu decay, have vanishingly small decay rates in the SM, but can be significantly enhanced in extended models. We report the latest results on these channels from LHCb.