Publication

New Theory Paper

November 18, 2020

Theory Division

“A new B-flavour anomaly in Bd,s->K0 anti-K0: anatomy and interpretation” by M. Algueró, A. Crivellin, S. Descotes-Genon, J. Matias and M. Novoa-Brunet. has been submitted to the arXiv.

We identify a new anomaly in an observable that we called L, constructed upon the longitudinal amplitudes of the non-leptonic decays Bd->K0* anti K0* versus Bs->K0* anti K0*. This observable is protected from leading order infrared divergences in hard-scattering and weak annihilation diagrams and exihibits a 2.6 sigma tension with data.

We establish a parallelism with RK of semileptonic B decays interchanging leptons by quarks and we identify the dominant Wilson coefficient in an EFT approach that could explain the anomaly with a 25% NP contribution.

Latest Group News

New Position

Pere Masjuan wins Associate Professorship at the Physics Department of UAB

September 15, 2021

Pere Masjuan has won an Associate Professorship at the Physics Department of UAB (Professor Agregat) in a position generated by himself for his outstanding achievements in research, transfer of knowledge, and outreach, starting the first of September.

Publication

New Theory group publication

September 8, 2021

Lensing of gravitational waves as a probe of compact dark matter by Juan Urrutia and Ville Vaskonen has been uploaded to arXiv.

Conference

IFAE at EPS-HEP 2021

July 28, 2021

The European Physical Society conference on high energy physics 2021 (EPS-HEP 2021), one of the most important conferences in HEP of the year, is taking place online this week. Three IFAE groups are participating: