Accessing CKM suppressed top decays at the LHC
Darius A. Faroughy, Jernej F. Kamenik, Manuel Szewc, Jure Zupan
SciPost Phys. 16, 131 (2024) · published 24 May 2024
- doi: 10.21468/SciPostPhys.16.5.131
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Abstract
We propose an extension of the existing experimental strategy for measuring branching fractions of top quark decays, targeting specifically $t\to j_q W$, where $j_q$ is a light quark jet. The improved strategy uses orthogonal $b$- and $q$-taggers, and adds a new observable, the number of light-quark-tagged jets, to the already commonly used observable, the fraction of $b$-tagged jets in an event. Careful inclusion of the additional complementary observable significantly increases the expected statistical power of the analysis, with the possibility of excluding $|V_{tb}|=1$ at $95\%$ C.L. at the HL-LHC, and accessing directly the standard model value of $|V_{td}|^2+|V_{ts}|^2$.
Authors / Affiliations: mappings to Contributors and Organizations
See all Organizations.- 1 Darius A. Faroughy,
- 2 3 Jernej F. Kamenik,
- 3 Manuel Szewc,
- 4 Jure Zupan
- 1 Universität Zürich / University of Zurich [UZH]
- 2 Univerza v Ljubljani / University of Ljubljana [UL]
- 3 Institut Jožef Stefan / Jožef Stefan Institute [IJS]
- 4 University of Cincinnati [UC]
- Deutsche Forschungsgemeinschaft / German Research FoundationDeutsche Forschungsgemeinschaft [DFG]
- Horizon 2020 (through Organization: European Commission [EC])
- Javna Agencija za Raziskovalno Dejavnost RS / Slovenian Research Agency [ARRS]
- National Science Foundation [NSF]
- Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung / Swiss National Science Foundation [SNF]
- United States Department of Energy [DOE]