Measurement of CKM matrix elements in single top quark $t$-channel production in proton-proton collisions at $\sqrt{s} = $ 13 TeV - INSPIRE

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Measurement of CKM matrix elements in single top quark $t$ -channel production in proton-proton collisions at $\sqrt{s} =$ 13 TeV

CMS

Collaboration

Apr 25, 2020

45 pages

Published in:

Phys.Lett.B 808 (2020) 135609

Published: Sep 10, 2020

e-Print:

2004.12181 [hep-ex]

DOI:

10.1016/j.physletb.2020.135609 (publication)

PDG:

\vert

_{LV}V_{tb}\vert

Report number:

CMS-TOP-17-012,
CERN-EP-2020-047

Experiments:

CERN-LHC-CMS

View in:

reference search54 citations

Citations per year

Abstract: (Elsevier)

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.

Note:

Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-17-012 (CMS Public Pages)

CMS
Physics
CKM matrix
Top quark
p p: scattering
p p: colliding beams
top: single production
decay: vertex
CERN LHC Coll
statistical

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