New Theory Paper
November 18, 2020Theory 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.
New GW and Theory group publication
July 28, 2021
“Search for a scalar induced stochastic gravitational wave background in the third LIGO-Virgo observing run” by A. Romero-Rodriguez, Mario Martinez, O. Pujolàs, M. Sakellariadou, V. Vaskonen has been uploaded to arXiv.
IFAE at EPS-HEP 2021
July 27, 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:
The IFAE theory group at HADRON 2021
July 27, 2021
The 19th International Conference on Hadron Spectroscopy and Structure in memoriam Simon Eidelman (HADRON2021) is taking place on July 26 - 31, 2021. The Theory Group at IFAE is contributing 2 talks