CERN Accelerating science

Article
Title	Studies of identified hadrons in qq events at LEP I, in $W^{+}W^{-}$ and $\overline{q}q$ events at LEP II and search for stable and long-lived heavy charged particles
Author(s)	Neufeld, N (CERN)
Publication	1999
In:	Nucl. Instrum. Methods Phys. Res., A 433 (1999) 338-42
DOI	10.1016/S0168-9002(99)00342-3
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LEP ; DELPHI
Abstract	The use of RICH detectors allows the identification of charged pions, kaons and protons, covering the full momentum range 0.7<or=p<or=E/sub beam//c. The pi /sup +or-/, K/sup +or-/ and p(p) normalised production rates, their differential cross-sections, multiplicities and the xi /sub p/ distributions are measured for three event samples, i.e. Z/sup 0/ to qq, Z/sup 0/ to bb and Z/sup 0/ to uu, dd, ss, selected from  1,400,000 Z/sup 0/ decays collected by DELPHI in 1994. This study has been extended to high-energy qq events at LEPII. New heavy particles from 2 GeV/c/sup 2/ to the kinematic limit at LEPII have been searched using the RICH detectors. (21 refs).

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