The CMS group at Institut pluridisciplinaire Hubert Curien (IPHC), Strasbourg, France, invites applications for a postdoctoral position to work on the search for CP violation in the tau Yukawa coupling in the CMS experiment at LHC.

The CMS group at IPHC is a founding member of CMS and had a key role in the development, installation and commissioning of the CMS tracker. The group holds today responsibilities in the upgrade of the tracker in view of High-Luminosity LHC, and identification of tau leptons. The group searches for Heavy Stable Charged Particles (HSCP), for displaced top quarks, as predicted by new physics scenarios, and is involved in the search for CP violation in the tau Yukawa coupling since Run 2 (10.1007/jhep06(2022)012 ).

The successful candidate will join the search for CP violation in the tau Yukawa coupling with a focus on the use of the so called polarimetric vector method in several Higgs boson to tau lepton decay modes, with LHC Run 3 data. To achieve this, he or she will work on the deployment of graph neural networks to improve the tau decay mode purity reconstruction and regression of the (full) tau lepton momenta. The latter developments are expected to benefit the search for CP violation analysis as well as many analyses of the CMS collaboration involving tau leptons in the final state. He or she will also participate to CMS data taking, student supervision and outreach activities.

 

The postdoctoral position is funded for 2 years. Hiring will be possible at the earliest on 1st of November 2022. The position is based at IPHC (Strasbourg, France); visits to CERN and participation to international conferences and workshops are expected. The gross salary will be comprised between 2600 and 3800 euros per month depending on the candidate’s previous experience.

Applicants must hold a Ph.D. in particle physics or an equivalent degree at the time of appointment. They should have analysis and software skills (ROOT, Python, C++) and should be able to communicate in English. Experience in machine learning and deep learning will be strongly appreciated. Strong experience in particle physics analysis would be an advantage but is not mandatory.

The IPHC, a joint research unit under the joint supervision of CNRS and the University of Strasbourg, is a multidisciplinary laboratory where research teams from different scientific cultures (ecology, physiology and ethology, chemistry and subatomic physics) develop very high level programs based on scientific instrumentation. The IPHC is structured into 4 departments and has a total staff of 393 staff including 257 permanent staff (ie 119 researchers and teachers / researchers and 138 technicians), 46 staff on fixed-term contracts and 90 doctoral students. The post-doctoral researcher will be welcomed into the CMS team which includes 12 researchers, 4 doctoral students, and 10 engineers.

Applicants should apply at: https://emploi.cnrs.fr/Offres/CDD/UMR7178-REGSOM-122/Default.aspx?lang=EN with their CV and a brief statement of research interests. Letters of recommendation should be sent to to Anne-Catherine Le Bihan (anne-catherine.le.bihan@cern.ch) and Saskia Falke (saskia.falke@cern.ch). Futher inquiries are welcome and can be made to Anne-Catherine Le Bihan and Saskia Falke.

Preference will be given to applications received by 28th of September 2022 (the current application date), but the position will remain open until filled.