23 August 2021 to 7 October 2021
Venue: OAC conference center, Kolymbari, Crete, Greece. Participation is possible also via internet.
Europe/Athens timezone

Multi-lepton anomalies at the LHC and implications

27 Aug 2021, 08:30
30m
Room 1

Room 1

Speaker

Bruce Mellado Garcia (University of the Witwatersrand)

Description

Based on a number of features from proton-proton collisions taken during Run 1 data taking period at the LHC, a boson with a mass around the Electro-Weak scale was postulated such that a significant fraction of its decays would comprise the Standard Model (SM) Higgs boson and an additional scalar, S. One of the implications of a simplified model, where S is treated a SM Higgs boson, is the anomalous production of high transverse momentum leptons. Corners of the phase-space are fixed according to the model parameters derived in 2017 without additional tuning, in order to nullify potential look-else-where effects or selection biases. A combined study of subsequent data is indicative of significant discrepancies between the data and SM Monte Carlos in a variety of final states involving multiple leptons with and without b-quarks. These discrepancies appear in corners of the phase-space where different SM processes dominate, indicating that the potential mismodeling of a particular SM process is unlikely to explain them. The internal consistency of these anomalies and their interpretation in the framework of the original hypothesis is quantified. Implications on the Higgs boson measurements, muon g-2 and and astrophysics are also discussed. A narrow structure in the di-photon and Zphoton spectra will also be presented.

Details

B.M. will present

Is this abstract from experiment? No
Name of experiment and experimental site N/A
Is the speaker for that presentation defined? Yes
Internet talk Yes

Author

Bruce Mellado Garcia (University of the Witwatersrand)

Presentation materials