Chronology of Milestone Events in Particle Physics - ALBAJAR 1987C
Chronology of Milestone Events in Particle Physics

ALBAJAR 1987C

UA1 collaboration; Albajar, C. et al.
Search for Bo o Oscillations at the CERN Proton Antiproton Collider. Paper 2
Phys. Lett. 186B (1987) 247; Phys. Lett. 197B (1987) 565;

Abstracts
We report a search for Bo o oscillations using events with two identified muons from data collected at the CERN p collider. In the absence of Bo o oscillations, dimuons coming directly from decays of beauty-antibeauty pairs must have opposite signs. Like-sign dimuons are expected from events where one muon arises from beauty decay and the other from the charm decay of the associated beauty-charm cascade. Taking these processes into account, together with the contribution from charm production, the predicted ratio of like-sign to unlike-sign muon pairs is 0.26 0.03. Experimentally we measure 0.42 0.07 0.03. A natural explanation for the excess of like-sign events is the existence of a significant amount of B0 o transitions. The fraction of beauty particles that produce first-generation decay muons with the opposite electric charge from that expected with out mixing is deduced to be: = 0.121 0.047. Combined with the null result from searching Bo o oscillations at e+ e colliders, our results are consistent with transitions in the Bs system, as favored theoretically.

Accelerator CERN-PBAR/P Detectors UA1

Related references
See also
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Reactions
  p + X 540,630 GeV (Ecm) mass, pt, ang
  p 2+ X 540,630 GeV (Ecm) mass, pt, ang
  p 2 X 540,630 GeV (Ecm) mass, pt, ang
  p bottom X 540,630 GeV (Ecm)
  Bo o amp, qnc
  Bs s amp, qnc
  Bs X
  s + X
  Bo X
  o X

Record comments
First indication of Bs-s mixing.
    
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