Charging a leptoquark under L_mu - L_tau

by Dr Matthew Kirk (La Sapienza Rome & INFN)

Thursday 28 Jan 2021, 12:00 → 13:00 Europe/Madrid

IFAE Virtual Seminar Room (IFAE)

The persistent anomalies in a variety of rare b->sll decays are one of the most intriguing signs of BSM physics at the moment.

The scalar leptoquark S3 is a common model proposed to explain these anomalies but it has some conceptual difficulties which are often brushed over, relating to proton decay and the generic lepton coupling.

After giving a general introduction to the history and current status of the b->sll flavour anomalies, I will discuss these problems and how promoting L_mu - L_tau, one of the accidental global symmetries of the SM, to a gauge symmetry can provide a nice solution to these problems. I also discuss the naturalness of introducing new scalars above the EW scale and will use an argument known as finite naturalness to justify the existence of a mass hierarchy.

MuChargedLQ_Kirk.pdf