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SUMMARY:Probing effective muon interactions using the NA64μ experiment at
  CERN
DTSTART;VALUE=DATE-TIME:20251119T174500Z
DTEND;VALUE=DATE-TIME:20251119T180000Z
DTSTAMP;VALUE=DATE-TIME:20260421T143809Z
UID:indico-contribution-28877@indico.ific.uv.es
DESCRIPTION:Speakers: Victor Martin Lozano (IFIC/UV)\nIn this work we anal
 yze how NA64μ can contribute to the global SMEFT program by probing two e
 ffective four lepton operators completely unbounded so far and break one o
 f the current flat directions. Furthermore\, we also study the potential o
 f NA64 testing an extension of SMEFT that includes fermion singlets of the
  SM gauge group in the low energy field content. This effective field theo
 ry\, usually dubbed νSMEFT\, is well motivated by the observation of ligh
 t neutrino masses and leptonic mixing. We find that NA64μ can constrain t
 hree unbounded four fermion operators of the νSMEFT. We derive the curren
 t leading bounds on these operators and compute the future sensitivity. Ou
 r results fill the gap between the current experimental program and a poss
 ible future muon collider able to probe this type of New Physics.\n\nhttps
 ://indico.ific.uv.es/event/8035/contributions/28877/
LOCATION:
URL:https://indico.ific.uv.es/event/8035/contributions/28877/
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