Département de physique nucléaire et corpusculaire

Colloques de Physique des Particules

dans le cadre de la procédure de nomination d'un-e
professeur-e associé-e ou assistant-e au DPNC

 

26 novembre - Auditoire 1S081 SCIII - Boulevard d'Yvoy

Heure	Conférencier	Titre du séminaire et Annonce
08h00	Dr William Bell	« Top-quark, Higgs boson and beyond the Standard Model »
09h00	Dr Anna Sfyrla	« Seeking supersymmetry with jets at ATLAS »
10h00	Dr Maria Chamizo	« Le cœur de la matière »
11h00	Dr Monica D'Onofrio	« The Quest for Bottom and Top squarks: past, present and future at the ATLAS experiment »

 

27 novembre - Auditoire 1S059 SCIII - Boulevard d'Yvoy

Heure	Conférencier	Titre du séminaire et Annonce
09h00	Dr Tobias Golling	« Life after Higgs »
10h00	Dr Lucia Masetti	« Searches for New Physics with top Quarks : a two-way approach »
11h00	Dr Krisztian Peters	« Higgs Physics at the Energy Frontier »

 

Dr William Bell
Title: Top-quark, Higgs boson and beyond the Standard Model - access to the talk
Abstract: Weaknesses in the Standard Model are discussed, suggesting where measurements might yield a better understanding of matter and its interaction. Top-quark and Higgs boson measurements are presented, with a discussion of experimental and theoretical challenges. An outlook of future LHC analyses to probe the Standard Model and beyond is given.

Dr Anna Sfyrla
Title: Seeking supersymmetry with jets at ATLAS - access to the talk
Abstract: With the discovery of the Higgs boson, all particles that the Standard Model predicts have been experimentally confirmed. Despite its great success, the Standard Model leaves unanswered several questions: why is the Higgs boson a light particle, are the forces unified at very high energies and what is the dark matter that astrophysical and cosmological observations hypothesise. Several extensions to the Standard Model are proposing solutions to these open questions, with supersymmetry being one of the best motivated and studied. Supersymmetric particles have been extensively searched for at collider experiments, evading discovery so far. They decay dominantly to quarks, creating collimated sprays of particles that are reconstructed in the detector as hadronic jets. Final states with many jets have been thoroughly exploited in the ATLAS experiment at the LHC. A roadmap of how this final state provides a unique discovery potential in the searches for supersymmetry is outlined and prospects for the higher energy and luminosity LHC runs are given.

Dr Maria Chamizo
Title: Le cœur de la matière
Abstract: Quels sont les éléments fondamentaux qui constituent la matière ? - access to the talk
Voilà sans doute une des questions les plus anciennes que les scientifiques se posent. Dans ce colloque nous ferons une revue des connaissances actuelles sur les constituants fondamentaux de la matière et des techniques utilisées en physique des particules pour répondre à cette question. Nous verrons quelles applications ont découlées des développements techniques et les réponses aux questions en suspens qui pourraient être apportées dans un futur proche.

Dr Monica D'Onofrio
Title: The Quest for Bottom and Top squarks: past, present and future at the ATLAS experiment - access to the talk
Abstract: Naturalness arguments for weak-scale supersymmetry favour supersymmetric partners of the third generation quarks with masses not too far from those of their Standard Model counterparts. Real and virtual production of bottom and top squarks via decay of a gluino can be significant if the mass of the gluino does not exceed the TeV scale. Third generation squarks with masses less than a few hundred GeV can also give rise to direct pair production rates that can be observed at the LHC. In this seminar I shall illustrate how searches for top and bottom squarks have been conducted in ATLAS during Run I, report on recent results and discuss prospects for Run II.

Dr Tobias Golling
Title: Life after Higgs - access to the talk
Abstract: Life after Higgs is probably as exciting as never before: it represents the culmination of the question if naturalness is the guiding principle in our understanding of particle physics. I will illustrate that the LHC experiments are in a unique position to shed light on this and many other puzzles of the Standard Model of particle physics. The grand ideas to solve these mysteries will be introduced and the key experimental techniques and strategies in the search for physics beyond the Standard Model will be presented. Concrete examples of searches for supersymmetric partners of the top quark will be used to illustrate the status and prospects of the hunt for new phenomena with the ATLAS experiment.

Dr Lucia Masetti -
Title: Searches for New Physics with Top Quarks: a two-way approach - access to the talk
Abstract: The top quark is the heaviest known elementary particle: point-like but as heavy as a gold atom, the only fermion with a natural Yukawa coupling and a naked quark decaying before hadronising. Almost 20 years after its discovery, top quarks could be produced at a high rate only recently at the LHC, where a few millions have been collected, allowing for very precise measurements of its properties. The high centre-of-mass energy of the LHC could be as well exploited for dedicated searches for new heavy particles decaying preferentially to top quarks. This talk will review the latest searches for direct and indirect evidence of new physics in the production and decay of top quarks at the LHC.

Dr Krisztian Peters - access to the talk
Title: Higgs Physics at the Energy Frontier
Abstract: The recent discovery of a scalar boson at the Large Hadron Collider (LHC) and the confirmation of its Higgs-like nature are a huge leap forward in understanding electroweak symmetry breaking and the fundamental theory of particle physics. During the LHC Run 1 which has completed in 2012, a large dataset has been accumulated. This allows to measure the properties of this new particle in great detail and to test whether it is indeed the Higgs boson as predicted by the Standard Model of particle physics. In this presentation I review the path from the discovery to the first precision measurements of the Higgs particle at hadron colliders, and give particular emphasis to the latest results from the LHC.