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SUMMARY:Séminaires doctorant.e.s
DTSTART:20260511T080000Z
DTEND:20260511T090000Z
DTSTAMP:20260507T210200Z
UID:indico-event-4330@lpsc-indico.in2p3.fr
DESCRIPTION:10h : Léo Constantin (Physique Théorique)\n10h30 : Louise Mi
 llot (ALICE)\n \n10h : Léo Constantin (Physique Théorique)\n"Tools and 
 methods to investigate new physics"\nPresentation in English\nAbstract :\n
 At LHC\, no clear evidence of new physics has yet emerged. Despite the eff
 orts made\, there remains room for improvement in the methods we use to pr
 obe physics beyond the standard model (BSM).\nI present strategies in the 
 context of both direct and indirect searches to constrain supersymmetry.Fi
 rst we study how well the public reinterpretation software SModelS v3.0 \,
  which re-use direct searches results\, compare with an internal reinterpr
 etation done by ATLAS.We explore how the picture changes when also includi
 ng CMS results\, and what can be gained by the statistical combination of 
 analyses.Our results underscore the need of a broad\, multifaceted approac
 h for maximising sensitivity and closing loopholes in the extensive SUSY p
 arameter space.Finally\, I introduce recent progress in the effective fiel
 d theory tools and the opportunities they offer to test supersymmetric sce
 narios.\n \n10h30 : Louise Millot (ALICE)\n"Jets in heavy-ion collisions 
 and how we can use them to probe the Quark-Gluon Plasma"\nPresentation in 
 English\nAbstract :\nHigh-energy heavy-ion collisions at the Large Hadron 
 Collider at CERN provide a unique environment to study Quantum Chromodynam
 ics (QCD) matter at extreme energy density and temperature. In these colli
 sions\, a deconfined state of nuclear matter known as the Quark-Gluon Plas
 ma (QGP) is formed.\nThis seminar presents an overview of the QGP and its 
 study within the ALICE experiment\, together with the progression of my Ph
 D work towards jet-based observables. Jets\, originating from high-energy 
 partons produced in initial hard scatterings\, are powerful probes of the 
 QGP as they undergo modifications while traversing the medium.\nIn particu
 lar\, the phenomenon of jet quenching reflects medium-induced energy loss 
 through both collisional and radiative processes\, leading to modification
 s of jet energy and internal structure. To investigate these effects in mo
 re detail\, jet substructure techniques are employed.\nAmong these\, the S
 oftDrop grooming algorithm will be introduced and discussed\, along with t
 he first checks and developments carried out during my PhD work. SoftDrop 
 systematically removes soft\, wide-angle radiation from jets\, allowing ac
 cess to the hard splitting structure of the parton shower. This enables th
 e study of medium-induced modifications at the level of the first hard spl
 itting\, providing enhanced sensitivity to the mechanisms of parton energy
  loss in the QGP\n\nhttps://lpsc-indico.in2p3.fr/event/4330/
LOCATION:Amphi
URL:https://lpsc-indico.in2p3.fr/event/4330/
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