A search for flavour changing neutral currents in top-quark decays in pp collision data collected with the ATLAS detector at √s=7 TeV
Please always quote using this URN: urn:nbn:de:bvb:20-opus-129152
- A search for flavour changing neutral current (FCNC) processes in top-quark decays by the ATLAS Collaboration is presented. Data collected from pp collisions at the LHC at a centre-of-mass energy of √s=7TeV during 2011, corresponding to an integrated luminosity of 2.1 fb\(^{−1}\), were used. A search was performed for top-quark pair-production events, with one top quark decaying through the t → Zq FCNC (q = u, c) channel, and the other through the Standard Model dominant mode t → W b. Only the decays of the Z boson to charged leptons andA search for flavour changing neutral current (FCNC) processes in top-quark decays by the ATLAS Collaboration is presented. Data collected from pp collisions at the LHC at a centre-of-mass energy of √s=7TeV during 2011, corresponding to an integrated luminosity of 2.1 fb\(^{−1}\), were used. A search was performed for top-quark pair-production events, with one top quark decaying through the t → Zq FCNC (q = u, c) channel, and the other through the Standard Model dominant mode t → W b. Only the decays of the Z boson to charged leptons and leptonic W -boson decays were considered as signal. Consequently, the final-state topology is characterised by the presence of three isolated charged leptons, at least two jets and missing transverse momentum from the undetected neutrino. No evidence for an FCNC signal was found. An upper limit on the t → Zq branching ratio of BR(t → Zq) < 0.73% is set at the 95% confidence level.…
| URN: | urn:nbn:de:bvb:20-opus-129152 |
|---|---|
| Document Type: | Journal article |
| Faculties: | Fakultät für Physik und Astronomie |
| Language: | English |
| Parent Title (English): | Journal of High Energy Physics |
| Year of Completion: | 2012 |
| Volume: | 9 |
| Issue: | 139 |
| Source: | Journal of High Energy Physics 09 (2012) 139. doi:10.1007/JHEP09(2012)139 |
| DOI: | https://doi.org/10.1007/JHEP09(2012)139 |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 539 Moderne Physik |
| Tag: | flavour changing; hadron hadron scattering; neutral currents; rare decays; top physics |
| Release Date: | 2016/11/23 |
| Creating Corporation: | ATLAS Collaboration |
| Licence (German): |  CC BY: Creative-Commons-Lizenz: Namensnennung |