http://hdl.handle.net/20.500.12128/9492
Title: | An anomalous Wtb coupling at a linear collider |
Authors: | Kołodziej, Karol |
Keywords: | quarks; production; top-quark mass |
Issue Date: | 2004 |
Citation: | Physics Letters B, Vol. 584, iss. 1-2 (2004), s. 89-97 |
Abstract: | Differential cross sections of secondary particles in a process of top quark pair production and decay into six fermions at a linear collider with an unpolarized and a longitudinally polarized electron beam are computed to the lowest order in the standard model and in the presence of an anomalous Wtb coupling. It is illustrated that the latter has a little impact on the differential cross sections. In particular, it is shown that the angular distribution of a secondary lepton receives practically no contribution from the anomalous Wtb coupling, even if the top quark is produced off shell and the non-double resonance background contributions are taken into account. This finding is in accordance with the decoupling theorem that has been proven in literature [Phys. Lett. B 476 (2000) 87; Phys. Lett. B 529 (2002) 82; Phys. Lett. B 557 (2003) 55; Pramana 54 (2000) 791, hep-ph/0002006] in the narrow top quark width approximation. |
URI: | http://hdl.handle.net/20.500.12128/9492 |
DOI: | 10.1016/j.physletb.2004.01.017 |
ISSN: | 0370-2693 |
Appears in Collections: | Artykuły (WNŚiT) |
File | Description | Size | Format | |
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Kolodziej_An_anomalous_Wtb_coupling.pdf | 521,14 kB | Adobe PDF | View/Open |
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