Chronology of Milestone Events in Particle Physics - ARNISON 1984C
Chronology of Milestone Events in Particle Physics

ARNISON 1984C

UA1 collaboration; Arnison, G. et al.
Observation of the Muonic Decay of the Charged Intermediate Vector Boson
Phys. Lett. 134B (1984) 469;

Abstracts
Muons of high transverse momentum pT have been observed in the large drift chambers surrounding the UA1 detector at the CERN 540 GeV p collider. For an integrated luminosity of 108 nb-1, 14 isolated muons have been found with pT > 15 GeV/c. They are correlated with a large imbalance in total transverse energy, and show a kinematic behaviour consistent with the muonic decay of the Intermediate Vector Boson W of weak interactions. The partial cross section is in agreement with previous measurements for electronic decay and muon-electron universality. The W mass is determined to be mW = 81+6-7 GeV/c2.

Accelerator CERN-PBAR/P Detectors UA1

Related references
See also
UA1 Coll., G. Arnison et al., Phys. Lett. 118B (1982) 167;
K. Eggert et al., Nucl. Instr. and Meth. 176 (1980) 233;
UA1 Coll., G. Arnison et al., Phys. Lett. 132B (1983) 214;
UA1 Coll., G. Arnison et al., Phys. Lett. 129B (1983) 273;
UA2 Coll., M. Banner et al., Phys. Lett. 122B (1983) 322;
UA2 Coll., M. Banner et al., Phys. Lett. 122B (1983) 476;
S. L. Glashow, Nucl. Phys. 22 (1961) 579;
S. Weinberg, Phys. Rev. Lett. 19 (1967) 1264;
A. Salam, Elementary Particle Theory, ed. N. Svartholm, Stockholm: Almqvist and Wiksell (1968) 367;
A. Astbury, Phys. Scr. 23 (1981) 397;
M. J. Corden et al., Phys. Scr. 25 (1982) 5;
M. J. Corden et al., Phys. Scr. 25 (1982) 11;
B. Aubert et al., Nucl. Instr. and Meth. 176 (1980) 195;
M. Barranco Luque et al., Nucl. Instr. and Meth. 176 (1980) 175;
M. Calvetti et al., Nucl. Instr. and Meth. 176 (1980) 255;
K. Eggert et al., Nucl. Instr. and Meth. 176 (1980) 217;
UA1 Coll., G. Arnison et al., Phys. Lett. 122B (1983) 103;

Reactions
  p + X 540 GeV (Ecm) mass, pt
  p X 540 GeV (Ecm) mass, pt
  p + jet X 540 GeV (Ecm) mass, pt
  p jet X 540 GeV (Ecm) mass, pt
  p W+ X 540 GeV (Ecm) cs
  p W X 540 GeV (Ecm) cs
  W+ + jet
  W jet

Particles studied
  W+ ex, mass
  W ex, mass

Record comments
Confirmation of W+ and W production. First observation of W± ± decays.
    
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