Testing V-A in top decay at CDF at squareroot s = 1.8 TeV
The structure of the tbW vertex can be probed by measuring the polarization of the W in t {yields} W + b {yields} l + v + b. The invariant mass of the lepton and b quark measures the W decay angle which in turn allows a comparison with polarizations expected from a V-A and V+A tbW vertex. We measure the fraction by rate of Ws produced with a V+A coupling in lieu of the Standard Model V-A to be f{sub V+A} = -0.21{sub -0.24}{sup +0.42}(stat) {+-} 0.21(sys). We assign a limit of f{sub V+A} < 0.80 {at} 95% CL. By combining this result with a complementary observable in the same data, we assign a limit of f{sub V+A} < 0.61 {at} 95% CL. From this CDF Run I preliminary result, we find no evidence for a non-standard Model tbW vertex.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC02-76CH03000
- OSTI ID:
- 815588
- Report Number(s):
- FERMILAB-Conf-03/280-E; TRN: US0304717
- Resource Relation:
- Conference: 8th Conference on the Intersections of Particle and Nuclear Physics (CIPANP 2003), New York, NY (US), 05/19/2003--05/24/2003; Other Information: PBD: 30 Sep 2003
- Country of Publication:
- United States
- Language:
- English
Similar Records
Measurement of the W boson polarization in top decay at CDF at s**(1/2) = 1.8-TeV
Measurement of the W boson polarization in top decay at CDF at {radical}(s)=1.8 TeV