Simple decay-lepton asymmetries in polarized and CP-violating dipole couplings of the top quark

1996/06/18 by P. Poulose, Saurabh D. Rindani · 4 citations
Engineering · Physics and Astronomy · #Particle Accelerators and Free-Electron Lasers #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #hep-ph

paper · pdf · doi:10.1016/0370-2693(96)00751-4

published as Phys.Lett. B383 (1996) 212-218 · 15 pages, latex, 3 figures as postscript files, uuencoded together with the text. Short version of paper hep-ph/9509299. To appear in Phys. Lett. B

arxiv created 1996/06/18 · openalex publication_date 1996/08/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We study two simple CP-violating asymmetries of leptons coming from the decay of t and øt in e⁺e^- \ra \tt, which do not need the full reconstruction of the t or øt for their measurement. They can arise when the top quark possesses nonzero electric and weak dipole form factors in the couplings to the photon and Z, respectively. Together, these two asymmetries can help to determine the electric and weak dipole form factors independently. If longitudinal beam polarization is available, independent determination of form factors can be done by measuring only one of the asymmetries. We obtain estimates of 90% confidence limits that can be put on these form factors at a future linear \ee collider operating at √(s)=500 GeV.

Citations

• Observation of the Top Quark
• Observation of Top Quark Production inp¯pCollisions with the Collider Detector at Fermilab

Cited by

• Lepton distribution as a probe of new physics in production and decay of thetquark and its polarization
• CP violation inwithin the minimal supersymmetric standard model
• Decay-lepton angular distributions in to in the soft-gluon approximation
• Charged lepton distributions as a probe of contacte+e−HZinteractions at a linear collider with polarized beams