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Nuclear and Particle Physics

Extended Higgs sector searches in ATLAS and the journey of building an improved tracker for the High-Lumi LHC

by Eleni Myrto Asimakopoulou

Europe/Stockholm
4007 (Ångstrom)

4007

Ångstrom

Description

The ATLAS experiment is one of the four major experiments at the Large Hadron Collider (LHC) at CERN, constructed to harvest the outcomes of the ring collisions for general-purpose searches.

The discovery of a Higgs boson at 125 GeV in 2012, solidified the power of the Standard Model (SM). A natural question is whether the discovered particle is indeed the scalar particle predicted by the SM or part of an extended Higgs sector. The existence of such an extended sector is predicted by many Beyond the SM (BSM) theories, such as the Two-Higgs-Doublet model (2HDM). Two BSM searches within ATLAS in the extened Higgs sector area will be discussed; the charged Higgs to tau nu and the di-Higgs to bbtautau searches. 

Presently the LHC is preparing for the High Luminosity upgrade (HL-LHC), where a factor of 10 increase in luminosity is targeted. The luminosity increase is equivalent to a demanding need for more bandwidth, higher granularity, higher radiation damage resiliency and better triggering capabilities to cope with the larger amount of data available. One of the main parts of the detector that need to upgraded is the Inner Tracker (ITk). Uppsala is part of the Scandinavian cluster of institutes, which is a contributor to the detector build. The effort is noteworthy both for its significance to the ATLAS upgrade, but also because of it is carried out in collaboration with industry. During the seminar, the deliverables, workflow and status of the project will be discussed.

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