Precision Measurements of Particle Masses using Jets at LEP 2
نویسنده
چکیده
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 m W 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. W W → q ¯ qq ¯ q and HZ → b ¯ bq ¯ q) and missing energy channels (e.g. W W → e¯ νq ¯ q and e + e − → Hν ¯ ν) is discussed. The emphasis is on the determination of m W , from which the rôle of calorimetry in such a precision measurement is emphasised.
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