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Reference : UMR7638-FLOBEA-003
Workplace : PALAISEAU
Date of publication : Wednesday, February 10, 2021
Scientific Responsible name : Florian Beaudette
Type of Contract : PhD Student contract / Thesis offer
Contract Period : 36 months
Start date of the thesis : 1 October 2021
Proportion of work : Full time
Remuneration : 2 135,00 € gross monthly
Description of the thesis topic
The first part of the thesis will be dedicated to the development of reconstruction algorithms exploiting the HGCAL high-granularity detector. This work will be carried out within a “particle flow” reconstruction scheme consisting in combining optimally (and possibly using machine learning techniques) the information of the different sub-detectors to identify, and measure the energy and momentum of all the particles individually. The possibility to exploit the timing information provided by the timing layer and by HGCAL will be explored..
In the second part of the thesis, the HH->bbtautau analysis will be tackled with the Run 3 data and will particularly focus on the Vector Boson Fusion production mechanism. Emphasis will be put on setting up data-driven background estimation techniques.
The knowledge thus acquired will be finally use to derive accurate predictions of the sensitivity achievable at HL-LHC.
The Laboratoire Leprince Ringuet is a joint research unit between CNRS and
École polytechnique. It is a founding member of the CMS Collaboration. It has designed, built, and is responsible for the operation of the Level-1 trigger for the electromagnetic calorimeter. It has major involvement in particle reconstruction and identification with the e/gamma and tau Physics Object Groups, and contributed to the development of the Particle Flow event reconstruction. The group is one of the key actors for the discovery of a Higgs boson and the measurement and is among the leading groups within the CMS Collaboration in the Higgs sector (H properties, HH production), in diboson, VBS and Heavy Ion physics.
The group is also strongly involved in the developments for the LHC Phase-2 CMS upgrades with major responsibilities in the mechanics, trigger, and software algorithms of the future endcap calorimeters.
Constraints and risks
Regular stays to CERN (Geneva) are foreseen.
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