New directions for top quark polarization in the $t$-channel process - INSPIRE

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New directions for top quark polarization in the $t$ -channel process

J.A. Aguilar-Saavedra
(
- Granada U., Theor. Phys. Astrophys. and
- CERN
)
,
S. Amor Dos Santos
(
- Coimbra U.
)

Apr 6, 2014

6 pages

Published in:

Phys.Rev.D 89 (2014) 11, 114009

Published: Jun 6, 2014

e-Print:

1404.1585 [hep-ph]

DOI:

10.1103/PhysRevD.89.114009

Report number:

CERN-PH-TH-2014-086

View in:

reference search49 citations

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Abstract: (APS)

We define three orthogonal axes to investigate the top-quark polarization in the t-channel single-top process. We provide expressions for the polarization in these axes in terms of anomalous Wtb couplings. It is found that the polarizations in the two axes orthogonal to the spectator quark axis are very sensitive to an anomalous coupling involving a b¯LσμνtR dipole term. In particular, an asymmetry based on the polarization normal to the production plane is more sensitive to the imaginary part of this coupling than previously studied observables.

Note:

LaTeX 6 pages. Minor changes, matches published version

14.65.Ha
12.60.-i
top: polarization
top: production
coupling: anomaly
quark: spectator
polarization: asymmetry
angular distribution
dipole
CERN LHC Coll

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Figures(10)

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