Heavy gauge boson and. Lambda. sub b baryon searches at CDF

Conference · Mon Jun 01 00:00:00 EDT 1992

OSTI ID:7157756

Maeshima, K

We have searched for new gauge bosons (W{prime}{yields} lv, Z{prime} {yields} ll) and b baryons ({Lambda}{sub b} {yields} {psi}{Lambda}{sup 0}) in p{bar p} collisions at {radical}s = 1.8 TeV from the 1988--1989 run of the Collider Detector at Fermilab (CDF). We present 95% confidence level (C.L.) limits on the W{prime} and Z{prime} production cross section in leptonic decay modes. The nonobservation of these processes leads to limits of M{sub w{prime}} > 520 GeV/c{sub 2} and M{sub z{prime}} > 412 GeV/c{sub 2} (95% C.L.), assuming Standard Model coupling strengths. We see no evidence for the signal ({Lambda}{sub b} {yields} {psi}{Lambda}{sup 0}) in our {psi} sample ({psi} {yields} {mu}{mu}) around the {Lambda}{sub b} mass region of 5600 MeV. We set an upper limit on F({Lambda}{sub b})Br({Lambda}{sub b} {yields} {psi}{Lambda}{sup 0}) of 0.55 {times} 10{sup {minus}3} (90% C.L.), assuming that b baryons and mesons are produced in the fragmentation process in similar ways. The CDF Ai, search is also reported in the QCD session of this conference. This paper summarizes our result briefly; the details can be found in the other talk.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 7157756
• Report Number(s): FNAL/C-92/160-E; CONF-9203154-7; ON: DE92019551
• Resource Relation: Conference: 27. Rencontres de Moriond, QCD and high energy hadronic interactions, Les Arcs (France), 22-28 Mar 1992
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
INTERMEDIATE VECTOR BOSONS
PARTICLE IDENTIFICATION
LAMBDA BARYONS
B MESONS
BRANCHING RATIO
CROSS SECTIONS
FERMILAB COLLIDER DETECTOR
MASS SPECTRA
PARTICLE PRODUCTION
PROTON-ANTIPROTON INTERACTIONS
BARYON-BARYON INTERACTIONS
BARYONS
BEAUTY PARTICLES
BOSONS
ELEMENTARY PARTICLES
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
HYPERONS
INTERACTIONS
INTERMEDIATE BOSONS
MESONS
NUCLEON-ANTINUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PSEUDOSCALAR MESONS
SPECTRA
STRANGE PARTICLES
662340* - Hadron Interactions- (1992-)
662410 - Properties of Baryons & Baryon Resonances- (1992-)
662440 - Properties of Other Particles Including Hypothetical Particles- (1992-)