Top pair production cross section at s**(1/2) = 1.96 TeV and a search for v + a current in top quark decay

Conference · Fri Sep 01 04:00:00 EDT 2006

OSTI ID:897030

Cabrera, S

Possible effects from physics beyond the Standard Model have been investigated in top quark decays from a data sample enriched in t{bar t} events produced in p{bar p} collisions at {radical}s = 1.96 TeV with an integrated luminosity of approximately 700 pb{sup -1} and collected with the CDF II detector. The combined t{bar t} production cross section measurement 7.3 {+-} 0.9 pb agrees with the QCD NLO predictions: 6.7 {+-} 0.8 pb assuming m{sub top} = 175 GeV/c{sup 2}. The fraction of the V + A current in top quark decay, f{sub V+A}, is determined using the invariant mass of the charged lepton and the bottom quark jet in the decay chain t {yields} Wb {yields} {ell}{nu}b (where {ell} = e or {mu}). The measured value f{sub V+A} = - 0.06 {+-} 0.25 under the assumption m{sub top} = 175 GeV/c{sup 2} is in agreement with the Standard Model. They set an upper limit on f{sub V+A} of 0.29 at the 95% confidence level.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 897030
• Report Number(s): FERMILAB-CONF-06-356-E
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CROSS SECTIONS
DATA
DECAY
Experiment-HEP
FERMILAB COLLIDER DETECTOR
LEPTONS
LUMINOSITY
PAIR PRODUCTION
PHYSICS
PRODUCTION
QUANTUM CHROMODYNAMICS
QUARKS
STANDARD MODEL
T QUARKS