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SUMMARY:Measurement of the Z boson mass with the LHCb detector
DTSTART:20250729T080000Z
DTEND:20250729T090000Z
DTSTAMP:20260518T065900Z
UID:indico-event-3907@indico.e5.physik.tu-dortmund.de
CONTACT:maik.becker@tu-dortmund.de\;serena.maccolini@cern.ch
DESCRIPTION:Speakers: Emir Muhammad (Universität Warwick)\n\nIn the Stand
 ard Model\, the Z boson acquires its mass of around 91 GeV through its gau
 ge interaction with the vacuum energy of the Higgs field. Including higher
  order corrections the Z mass is predicted with a precision of better than
  10 MeV\, which corresponds to one part in 10\,000. The Z mass was measure
 d to 2 MeV by the four LEP experiments in a beam-energy scan of the LEP e+
 e- collider. Meanwhile\, hadron collider experiments have dominated the me
 asurements of the W boson mass\, but their studies of the Z boson mass hav
 e been primarily in the context of calibrations for the W mass analyses.\n
 Here we present the first dedicated Z boson mass measurement in proton-pro
 ton collisions. The data were recorded in 2016 by the LHCb experiment and 
 correspond to an integrated luminosity of 1.7 fb-1. The Z mass is determin
 ed from a fit to the dimuon mass distribution in Z → μ⁺μ⁻  decays
 . Templates from simulation are used in the fit\, with a momentum calibrat
 ion based on quarkonium resonance decays. The result is compared with prev
 ious measurements of the Z mass and with the predicted value from the glob
 al electroweak fit.\n\nhttps://indico.e5.physik.tu-dortmund.de/event/3907/
LOCATION:CP-03-123 (TU Dortmund)
URL:https://indico.e5.physik.tu-dortmund.de/event/3907/
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