Intitulé de l'offre : Postdoctorate on ATLAS at the Laboratoire de Physique de Clermont (M/F) (H/F)
Référence : UMR6533-ROMMAD-002
Nombre de Postes : 1
Lieu de travail : AUBIERE
Date de publication : vendredi 2 février 2024
Type de contrat : CDD Scientifique
Durée du contrat : 24 mois
Date d'embauche prévue : 1 avril 2024
Quotité de travail : Temps complet
Rémunération : from €2905 gross per month depending on experience
Niveau d'études souhaité : Niveau 8 - (Doctorat)
Expérience souhaitée : 1 à 4 années
Section(s) CN : Interactions, particles, nuclei, from laboratory to cosmos
The LPC Clermont-Ferrand is recruiting a researcher for a two-year postdoctoral fellowship on ATLAS, as part of the ANR EFTatLHC. The proposed research will focus mainly on Higgs boson physics, but also on Top quark physics, and on EFT interpretations that can be performed coherently in both sectors. The experimental contribution on the Higgs will focus on the analysis of ATLAS data from Run 3 in the search for the simultaneous production of two Higgs bosons in association with a pair of top quarks. The production of ttHH is so rare that it will not be observable with Run 3 data, yet this process gives access to EFT operators difficult to constrain otherwise. This is why the development of EFTs interpretations will complement this analytical work, oriented in particular towards operators with different behavior with respect to charge-parity symmetry (CP-even / CP-odd), in particular via possbile collaborations with theorists. This work could then be coupled to a phenomenological study aimed at identifying generic effects of CP-even and CP-odd operators in the quark top sector, based on angular observables in ttbar events. Finally, these two projects (Higgs and Top) could be combined in a global approach to best constrain the CP-even or CP-odd nature of a possible phenomenon beyond the Standard Model, in particular affecting the third generation and the Higgs boson.
- search for ttHH production
- analysis of EFT operators CP-even and CP-odd sensitive to ttHH production
- determination of the impact of these operators on Anglular variables in ttbar events
- study of the complementarity of the Higgs and Top sectors
- Physics: good knowledge of particle physics analysis. Knowledge of EFTs is a plus.
- Programming and technical skills: Proficiency in C++, ROOT, Python.
- Language: Fluent in written and spoken English.
- Good communication skills and ability to work in a team.
Contexte de travail
The Atlas@Clermont team is part of the Laboratoire de Physique de Clermont (LPC), which also includes LHCb, ALICE, LSST and theoretical physics teams, as well as research teams in physics applied to health, environment and energy. The LPC is hosted by the Université de Clermont Auvergne (UCA) and is part of the Institut National de Physique Nucléaire et des Particules (IN2P3), a division of the Centre National de Recherche Scientifique (CNRS). Around half of the LPC's 160 members work in one of the technical departments (computer science, mechanics, electronics and microelectronics) or in the administrative department. The LPC is located on the outskirts of Clermont-Ferrand, a medium-sized but dynamic city in the west of the Auvergne-Rhônes-Alpes region, 3h30 from CERN. The town borders the Parc Régional des Volcans d'Auvergne, recently listed as a UNESCO World Heritage Site. Numerous cultural activities are on offer, culminating each year in February with the International Short Film Festival (the world's largest festival of its kind). Clermont-Ferrand is also the birthplace of the Michelin company. Clermont-Ferrand also boasts an efficient public transport network, with the LPC in particular benefiting from a tramway stop in the immediate vicinity. The cost of living in Clermont-Ferrand is low compared with major cities such as Lyon or Paris. The Atlas@Clermont team receives substantial financial support from CNRS/IN2P3 each year, mainly covering travel expenses (to CERN, workshops and conferences) and local computing costs. It provides the team with a pleasant working environment (desks and laptops), including a dedicated local batch cluster with 200 TB of disk storage.
The team is a founding member of the ATLAS collaboration and has always made a significant contribution to the hadronic scintillating tile calorimeter (TileCal), as well as to physics analyses, particularly in relation to the top quark (first thesis on this subject defended in 2002). The Atlas@Clermont team is also active in the phase 2 upgrade for the HL-LHC, for many years on TileCal and since 2018 on HGTD. For several years, the team has specialized in the search for new physics with final states containing one or more top quarks (ttbar resonances, tbbar resonances) and in particular initiated in ATLAS in 2011 the search for events containing four top quarks, observed for the first time in 2020. Since 2013, the team has also made a significant contribution to the search for the associated production of a Higgs boson and a top quark pair (ttH), finally observed in 2018, before turning its attention to the search for di-Higgs, in particular in association with a top quark pair. Since 2022, it has opened up a new direction in the search for long-lived exotic particles. The team also has strong experience in developing artificial intelligence algorithms applied to physics data analysis. French is not a prerequisite, and free French lessons will be available. A good knowledge of English is required.