A search for the production of the final states. tau. sup +. tau. sup minus e sup + e sup minus ,. tau. sup +. tau. sup minus. mu. sup +. mu. sup minus , and. tau. sup +. tau. sup minus. pi. sup +. pi. sup minus in e sup + e sup minus collisions at radical s = 29 GeV

Conference · Mon Jul 01 04:00:00 EDT 1991

OSTI ID:5185361

We have searched for the reaction e{sup +}e{sup {minus}} {yields} {tau}{sup +}{tau}{sup {minus}}{bar f}f, where f is either an electron, muon, or charged pion, at {radical}s = 29 GeV using the Mark 2 detector at the PEP storage ring. One candidate event is found while 2.3 events are expected from known processes. We would expect to see 11 events if the cross-section for e{sup +}e{sup {minus}} {yields} {tau}{sup +}{tau}{sup {minus}}{bar f}f at {radical}s = 29 GeV were enhanced by the factor of 4.7 which the ALEPH collaboration reports for {radical}s = 91 GeV. we also look for e{sup +}e{sup {minus}} {yields} e{sup +}e{sup {minus}}{bar f}f and e{sup +}e{sup {minus}} {yields} {mu}{sup +}{mu}{sup {minus}} {bar f}f, and for e{sup +}e{sup {minus}} {yields} {tau}{sup +}{tau}{sup {minus}} {gamma} using a similar analysis procedure and see the number of events predicted by the standard model. 10 refs., 5 figs., 3 tabs.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (United States); Lawrence Berkeley Lab., CA (United States); Harvard Univ., Cambridge, MA (United States). Dept. of Physics
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 5185361
• Report Number(s): SLAC-PUB-5600; LBL--31178; CONF-9107172--1; ON: DE91018884
• Country of Publication: United States
• Language: English

Related Subjects

645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CROSS SECTIONS
ELECTRON PAIRS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
FINAL-STATE INTERACTIONS
HEAVY LEPTONS
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
LEPTONS
MASS SPECTRA
MATHEMATICAL MODELS
MUON PAIRS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PEP STORAGE RINGS
POSTULATED PARTICLES
SPECTRA
STANDARD MODEL
STORAGE RINGS
TAU PARTICLES
UNIFIED GAUGE MODELS