Projecten per jaar
Abstract
The first direct, model-independent measurement is presented of the modulus of the Cabibbo--Kobayashi--Maskawa (CKM) matrix elements $|V_{tb}|$, $|V_{td}|$, and $|V_{ts}|$, 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 $|V_{tb}| > 0.970$ 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 $|V_{tb}| = 0.988 \pm 0.024 $, and $|V_{td}|^2 +|V_{ts}|^2 = 0.06 \pm 0.06$, where the uncertainties include both statistical and systematic components, are measured.
Datum van beschikbaarheid | 29 dec 2020 |
---|---|
Uitgever | HEPData |
Format
- Format
-
-
iBOF/23/074: Ontsluiten van de charm-Higgs koppeling bij de LHC
D'Hondt, J., Lowette, S., Van Mechelen, P. & Dobur, D.
1/01/23 → 31/12/26
Project: Fundamenteel
-
Onderzoekersoutput
- 1 Article
-
Measurement of CKM matrix elements in single top quark t-channel production in proton-proton collisions at root s=13 TeV
Collaboration, CMS., Blekman, F., Bols, E. S., Chhibra, S. S., D'Hondt, J., De Clercq, J., Lontkovskyi, D., Lowette, S., Marchesini, I., Moortgat, S., Python, Q., Tavernier, S., Van Doninck, W., Van Mulders, P., Burns, D. & Burns, D. J. P., 10 sep 2020, In: Phys. Lett. B. 808, September 2020, 31 blz., 135609.Onderzoeksoutput: Article › peer review
Open AccessBestand22 Citaten (Scopus)91 Downloads (Pure)