Precision Measurements of Particle Masses using Jets at LEP2J. Jason Ward Department of Physics and Astronomy University of Glasgow Glasgow, G12 8QQ United Kingdom E-mail: Jason.Ward@cern.ch
Abstract:
How massive elementary particles get their mass is one of the greatest
open questions in physics. Two of the major goals of the current LEP2
physics program that help to address this question are (a) to measure as
precisely as possible the W Boson mass mW and (b) to exclude or
discover the Higgs Boson within the available kinematic region. The
reconstruction of invariant masses with jets from 4-jet channels (e.g.
WWqq and HZ
bq)
and missing energy channels (e.g.
WWeq and
e+e-H) is discussed. The emphasis is on
the determination of mW, from which the rôle of calorimetry
in such a precision measurement is emphasised.
Invited Talk at the VIII International Conference on Calorimetry in High Energy Physics, Lisbon, Portugal, June 13-19, 1999.