Measurement of CKM matrix elements in single top quark t-channel production in proton-proton collisions at s=13 TeV
dc.citation.articleNumber | 135609 | |
dc.citation.journalTitle | Physics Letters B | |
dc.citation.volumeNumber | 808 | |
dc.contributor.author | The CMS Collaboration | |
dc.date.accessioned | 2020-08-12T19:06:09Z | |
dc.date.available | 2020-08-12T19:06:09Z | |
dc.date.issued | 2020 | |
dc.description.abstract | The first direct, model-independent measurement is presented of the modulus of the Cabibbo–Kobayashi–Maskawa (CKM) matrix elements |η|Vtb, |η|Vtd, and |η|Vts, in final states enriched in single top quark t-channel events. The analysis uses proton-proton collision data from the LHC, collected during 2016 by the CMS experiment, at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb−1. Processes directly sensitive to these matrix elements are considered at both the production and decay vertices of the top quark. In the standard model hypothesis of CKM unitarity, a lower limit of |η|Vtb>0.970 is measured at the 95% confidence level. Several theories beyond the standard model are considered, and by releasing all constraints among the involved parameters, the values |η|Vtb=0.988±0.024, and |η|Vtd2+|η|Vts2=0.06±0.06, where the uncertainties include both statistical and systematic components, are measured. | |
dc.identifier.citation | The CMS Collaboration. "Measurement of CKM matrix elements in single top quark t-channel production in proton-proton collisions at s=13 TeV." <i>Physics Letters B,</i> 808, (2020) Elsevier: https://doi.org/10.1016/j.physletb.2020.135609. | |
dc.identifier.doi | https://doi.org/10.1016/j.physletb.2020.135609 | |
dc.identifier.uri | https://hdl.handle.net/1911/109190 | |
dc.language.iso | eng | |
dc.publisher | Elsevier | |
dc.rights | This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.subject.keyword | CMS | |
dc.subject.keyword | Physics | |
dc.subject.keyword | CKM matrix | |
dc.subject.keyword | Top quark | |
dc.title | Measurement of CKM matrix elements in single top quark t-channel production in proton-proton collisions at s=13 TeV | |
dc.type | Journal article | |
dc.type.dcmi | Text | |
dc.type.publication | publisher version |
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