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Home page > PhD fellowships > Proposed PhD subjects 2016-2019 > ATLAS : Search for new physics in the monophoton final state with the ATLAS detector at the LHC

ATLAS : Search for new physics in the monophoton final state with the ATLAS detector at the LHC

by Luc Frappat - 17 December 2015

Topics:  LHC Physics, ATLAS collaboration

Proponents:  Marie-Hélène Genest, Fabienne Ledroit

Address:  LPSC Grenoble - 53, rue des Martyrs - 38026 GRENOBLE CEDEX

Phone:  + 33 (0)476 28 40 75

Contact Email:

The presence of Cold Dark Matter in the universe has been evidenced by a number of astrophysical experiments. Direct and indirect detection experiments are looking for manifestations of the elusive new particle. In a completely complementary approach, one can look for the production of such weakly interacting massive particles (WIMP) at the LHC. In order to make the search possible with the ATLAS detector at the LHC, one usually relies on the presence of an identifiable object in the event coming from initial state radiation (ISR), such as a photon. A search can hence be performed using this single particle from ISR and the missing transverse momentum coming from the escaping dark matter particles. Such a final state can also be used to look for different models of new physics beyond the Standard Model, such as supersymmetry or large extra dimensions.
Thesis work:
The ATLAS group at LPSC has played an important role in the search for physics beyond the Standard Model in final states containing photon(s) using run I data. With the beginning of run II in 2015 at a centre-of-mass energy of 13 TeV, a new window of opportunity is opening for these searches. The student will join the ATLAS Collaboration and is expected to work on the search for Dark Matter in the mono-photon channel using run II data. The thesis work will cover the various stages of the analysis. The student will hence have the opportunity to get a good overview of the full analysis chain within a high-energy physics experiment.