Abazov, V. M. ; Mondal, N. K. ; et., al (2011) Measurement of the W Boson helicity in top quark decays using 5.4 fb-1 of pp‾ collision data Physical Review D - Particles, Fields, Gravitation and Cosmology, 83 (3). 032009_1-032009_18. ISSN 1550-7998
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Official URL: http://prd.aps.org/abstract/PRD/v83/i3/e032009
Related URL: http://dx.doi.org/10.1103/PhysRevD.83.032009
Abstract
We present a measurement of the helicity of the W boson produced in top quark decays using tt‾ decays in the l+jets and dilepton final states selected from a sample of 5.4 fb-1 of collisions recorded using the D0 detector at the Fermilab Tevatron pp‾ collider. We measure the fractions of longitudinal and right-handed W bosons to be f0=0.669± 0.102[± 0.078(stat.)± 0.065(syst.)] and f+=0.023± 0.053[± 0.041(stat.)± 0.034(syst.)], respectively. This result is consistent at the 98% level with the standard model. A measurement with f0 fixed to the value from the standard model yields f+=0.010± 0.037[± 0.022(stat.)± 0.030(syst.).].
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 66915 |
| Deposited On: | 27 Oct 2011 11:40 |
| Last Modified: | 27 Oct 2011 11:41 |
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