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La physique de l’infiniment grand l’infiniment petit

12/12/2023 : Unlocking new physics at low mass with CMS data scouting and data parking

11 décembre 2023

par Elisa Fontanesi (Boston University) se déroulera le mardi 12 décembre 2023 à 14h00 dans la salle de conférence du LLR.

The Compact Muon Solenoid (CMS) experiment at CERN’s Large Hadron Collider (LHC) has developed innovative techniques, data scouting and data parking, to enhance the sensitivity of new physics searches and improve precision in standard model measurements. These methods allow for more efficient data collection, especially for low-mass signals, addressing resource limitations. In particular, the investigation of the prompt production of a GeV scale resonance decaying to a pair of muons in the CMS detector is improved thanks to the Run 2 dimuon scouting strategy. A new search for narrow resonance peaks in the dimuon mass continuum in the ranges from 1.1–2.6 and from 4.2–7.9 GeV is performed using the 13 TeV proton-proton collision data collected by CMS during the 2017-2018 operation of the LHC and corresponding to an integrated luminosity of 96.6 fb−1. Model-independent limits on production rates of dimuon resonances within the experimental fiducial acceptance are interpreted in the context of two specific models and compared to the LHCb and BaBar results : a dark photon model and a two Higgs doublet model with an extra scalar. This seminar also highlights the recent effort and novel strategies to enhance the reach of data scouting and parking and the low-mass physics sensitivity in the next decade of data collection.