A search for the rare decay K sub L yields. mu. e

Thesis/Dissertation · Sat Dec 31 23:00:00 EST 1988

OSTI ID:5220163

Ginkel, J F

A sensitive search has been carried out for the rare decay K{sub L} {yields} {mu}e. This decay violates conservation of separate lepton-number and thus is forbidden in the Standard Model of electro-weak interactions. Many new models have been proposed which could permit this process. The data were collected in the B5 beamline of the Alternating Gradient Synchrotron facility at the Brookhaven National Laboratory during the Spring, 1988 slow-extracted beam running period. The experiment was sensitive to approximately fifty million K{sub L} {yields} {pi}{pi} decays. No K{sub L} {yields} {mu}e candidate events were detected. The 90% confidence level upper limit for the branching ratio is B(K{sub L} {yields} {mu}e) < 2.2 {times} 10{sup {minus}10}. This limit places a constraint on the mass of exotic particles proposed in many new theories.

• Research Organization: College of William and Mary, Williamsburg, VA (United States)
• OSTI ID: 5220163
• Country of Publication: United States
• Language: English

Related Subjects

645102* -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental-- Weak Interactions &amp; Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BOSONS
BROOKHAVEN AGS
CYCLIC ACCELERATORS
DECAY
DETECTION
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
KAONS
KAONS NEUTRAL
KAONS NEUTRAL LONG-LIVED
LEPTON NUMBER
LEPTONS
MATHEMATICAL MODELS
MESONS
MUONS
PARTICLE DECAY
PARTICLE MODELS
PSEUDOSCALAR MESONS
STANDARD MODEL
STRANGE MESONS
STRANGE PARTICLES
SYNCHROTRONS
UNIFIED GAUGE MODELS
WEAK PARTICLE DECAY