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SUMMARY: How to disentangle Parton Distribution Functions and new physics 
 signals? - Elie Hammou (DAMTP)
DTSTART:20241129T160000Z
DTEND:20241129T170000Z
UID:TALK224254@talks.cam.ac.uk
CONTACT:Nico Gubernari
DESCRIPTION:The interpretation of hadron collider\, such as the LHC\, data
 \, and the assessment of possible hints of new physics\, require the preci
 se knowledge of the proton structure in terms of parton distribution funct
 ions (PDFs). In this talk\, I present a systematic methodology designed to
  determine whether and how global PDF fits might inadvertently 'fit away' 
 signs of new physics in the high-energy tails of the distributions. I show
 case a scenario for the High- Luminosity LHC\, in which the PDFs may compl
 etely absorb such signs of new physics\, thus biasing theoretical predicti
 ons and interpretations. I discuss strategies to single out the effects in
  this scenario and disentangle the inconsistencies that stem from them. A 
 first solution I discuss is the exploration of the synergy between the hig
 h luminosity programme at the LHC and present and future low-energy measur
 ements of large-sea quark distributions. A second one\, is to fit simultan
 eously the PDFs and the new physics signals\, which can be done using our 
 publicly released open-source tool SIMUnet.
LOCATION:MR19 (Potter Room\, Pavilion B)\, CMS
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