Search for Higgs boson decays into two new low-mass spin-0 particles in the 4b channel with the ATLAS detector using pp collisions at √s=13 TeV has been submitted to Phys. Rev. D.
This paper describes a search for beyond the Standard Model decays of the Higgs boson into a pair of new spin-0 particles (a) subsequently decaying into b-quark pairs, H->aa->(bb)(bb). The search targets the production mode where the Higgs boson is produced in association with a Z boson, and focuses on the challenging mass regime of 15<m(a)<30 GeV, which yields collimated a->bb decay products requiring the development of a novel strategy for their identification.
From the IFAE-ATLAS team, Aurelio Juste has contributed to the analysis.
Instrumentation
First Pre-production Modules for the ATLAS upgrades for the LH-LHC Assembled at IFAE
February 21, 2024
The first pre-production triplet module for the ATLAS upgrades for the LH-LHC has been assembled this week at IFAE. The IFAE ATLAS Pixels group is building modules for the innermost pixel layer of the tracking detector (ITk) and the new high granularity timing detector (HGTD).