Accessing CKM suppressed top decays at the LHC
| Autor: | Faroughy, Darius A., Kamenik, Jernej F., Szewc, Manuel, Zupan, Jure |
|---|---|
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | SciPost Phys. 16, 131 (2024) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.21468/SciPostPhys.16.5.131 |
| Popis: | 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 $|V_{td}|^2+|V_{ts}|^2$. Comment: 19 pages, 7 figures |
| Databáze: | arXiv |
| Externí odkaz: |
|