26-30 November 2018
Europe/Vienna timezone

Tests of Lepton Flavour Universality at LHCb

28 Nov 2018, 17:20


Austrian Academy of Sciences, Dr.-Ignaz-Seipel-Platz 2, 1010 Vienna, AUSTRIA
Non-Invited Talk [8] New results from LHC, new facilities New results from LHC, new facilities


Annarita Buonaura (Universität Zürich (CH))


In the Standard Model the three charged leptons are identical copies of each other, apart from mass differences, and the electroweak coupling of the gauge bosons to leptons is independent of the lepton flavour. This prediction is called lepton flavour universality (LFU) and is well tested in tree level decays; any violation of LFU would be a clear sign of physics beyond the Standard Model. Experimental tests of LFU in semileptonic decays of b hadrons and in rare b decays are highly sensitive to models of New Physics in which new, heavy particles couple preferentially to the 2nd and 3rd generations of leptons. Such models often also predict charged lepton flavour violation (CLFV). Recent results from LHCb on LFU in semileptonic b → clν transitions and rare b->sll decays are discussed, along with searches for CLFV.

Content of the contribution Experiment

Primary author

Katharina Mueller (Universitaet Zuerich (CH))

Presentation Materials