Search for flavor-changing neutral currents in top-quark decays t → Zq in pp collisions at sqrt[s] = 8 TeV.
A search for flavor-changing neutral currents in top-quark decays t → Zq is performed in events produced from the decay chain tt → Zq+Wb, where both vector bosons decay leptonically, producing a final state with three leptons (electrons or muons). A data set collected with the CMS detector at the LH...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2014
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| _version_ | 1826295428125032448 |
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| author | Chatrchyan, S Khachatryan, V Sirunyan, A Tumasyan, A Adam, W Bergauer, T Dragicevic, M Erö, J Fabjan, C Friedl, M Frühwirth, R Ghete, V Hartl, C Hörmann, N Hrubec, J Jeitler, M Kiesenhofer, W Knünz, V Krammer, M Krätschmer, I Liko, D Mikulec, I Rabady, D Rahbaran, B Rohringer, H |
| author_facet | Chatrchyan, S Khachatryan, V Sirunyan, A Tumasyan, A Adam, W Bergauer, T Dragicevic, M Erö, J Fabjan, C Friedl, M Frühwirth, R Ghete, V Hartl, C Hörmann, N Hrubec, J Jeitler, M Kiesenhofer, W Knünz, V Krammer, M Krätschmer, I Liko, D Mikulec, I Rabady, D Rahbaran, B Rohringer, H |
| author_sort | Chatrchyan, S |
| collection | OXFORD |
| description | A search for flavor-changing neutral currents in top-quark decays t → Zq is performed in events produced from the decay chain tt → Zq+Wb, where both vector bosons decay leptonically, producing a final state with three leptons (electrons or muons). A data set collected with the CMS detector at the LHC is used, corresponding to an integrated luminosity of 19.7 fb(-1) of proton-proton collisions at a center-of-mass energy of 8 TeV. No excess is seen in the observed number of events relative to the standard model prediction; thus, no evidence for flavor-changing neutral currents in top-quark decays is found. A combination with a previous search at 7 TeV excludes a t → Zq branching fraction greater than 0.05% at the 95% confidence level. |
| first_indexed | 2024-03-07T04:00:53Z |
| format | Journal article |
| id | oxford-uuid:c48daaf7-7af7-4dbe-825f-eac2f5823a00 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T04:00:53Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | oxford-uuid:c48daaf7-7af7-4dbe-825f-eac2f5823a002022-03-27T06:24:15ZSearch for flavor-changing neutral currents in top-quark decays t → Zq in pp collisions at sqrt[s] = 8 TeV.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:c48daaf7-7af7-4dbe-825f-eac2f5823a00EnglishSymplectic Elements at Oxford2014Chatrchyan, SKhachatryan, VSirunyan, ATumasyan, AAdam, WBergauer, TDragicevic, MErö, JFabjan, CFriedl, MFrühwirth, RGhete, VHartl, CHörmann, NHrubec, JJeitler, MKiesenhofer, WKnünz, VKrammer, MKrätschmer, ILiko, DMikulec, IRabady, DRahbaran, BRohringer, HA search for flavor-changing neutral currents in top-quark decays t → Zq is performed in events produced from the decay chain tt → Zq+Wb, where both vector bosons decay leptonically, producing a final state with three leptons (electrons or muons). A data set collected with the CMS detector at the LHC is used, corresponding to an integrated luminosity of 19.7 fb(-1) of proton-proton collisions at a center-of-mass energy of 8 TeV. No excess is seen in the observed number of events relative to the standard model prediction; thus, no evidence for flavor-changing neutral currents in top-quark decays is found. A combination with a previous search at 7 TeV excludes a t → Zq branching fraction greater than 0.05% at the 95% confidence level. |
| spellingShingle | Chatrchyan, S Khachatryan, V Sirunyan, A Tumasyan, A Adam, W Bergauer, T Dragicevic, M Erö, J Fabjan, C Friedl, M Frühwirth, R Ghete, V Hartl, C Hörmann, N Hrubec, J Jeitler, M Kiesenhofer, W Knünz, V Krammer, M Krätschmer, I Liko, D Mikulec, I Rabady, D Rahbaran, B Rohringer, H Search for flavor-changing neutral currents in top-quark decays t → Zq in pp collisions at sqrt[s] = 8 TeV. |
| title | Search for flavor-changing neutral currents in top-quark decays t → Zq in pp collisions at sqrt[s] = 8 TeV. |
| title_full | Search for flavor-changing neutral currents in top-quark decays t → Zq in pp collisions at sqrt[s] = 8 TeV. |
| title_fullStr | Search for flavor-changing neutral currents in top-quark decays t → Zq in pp collisions at sqrt[s] = 8 TeV. |
| title_full_unstemmed | Search for flavor-changing neutral currents in top-quark decays t → Zq in pp collisions at sqrt[s] = 8 TeV. |
| title_short | Search for flavor-changing neutral currents in top-quark decays t → Zq in pp collisions at sqrt[s] = 8 TeV. |
| title_sort | search for flavor changing neutral currents in top quark decays t zq in pp collisions at sqrt s 8 tev |
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