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SUMMARY:Cavendish HEP Seminars: Measurement of the Z boson mass with the L
 HCb detector
DTSTART:20261020T100000Z
DTEND:20261020T111500Z
DTSTAMP:20261023T230800Z
UID:indico-event-19478@indico.global
DESCRIPTION:Speakers: Nikolai Fomin (University of Cambridge (GB))\, Matth
 ew David Monk (University of Cambridge (GB))\n\nIn the Standard Model\, th
 e Z boson acquires its mass of around 91 GeV through its gauge interaction
  with the vacuum energy of the Higgs field. Including higher order correct
 ions the Z mass is predicted with a precision of better than 10 MeV\, whic
 h corresponds to one part in 10\,000. The Z mass was measured to 2 MeV by 
 the four LEP experiments in a beam-energy scan of the LEP e+e- collider. M
 eanwhile\, hadron collider experiments have dominated the measurements of 
 the W boson mass\, but their studies of the Z boson mass have been primari
 ly in the context of calibrations for the W mass analyses.\nHere we presen
 t the first dedicated Z boson mass measurement in proton-proton collisions
 .\nThe data were recorded in 2016 by the LHCb experiment and correspond to
  an integrated luminosity of 1.7 fb-1. The Z mass is determined from a fit
  to the dimuon mass distribution in Z -> mu+mu- decays. Templates from sim
 ulation are used in the fit\, with a momentum calibration based on quarkon
 ium resonance decays. The result is compared with previous measurements of
  the Z mass and with the predicted value from the global electroweak fit.\
 n\nhttps://indico.global/event/19478/
LOCATION:Ray Dolby Centre Seminar Room B\, B2.002
URL:https://indico.global/event/19478/
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