# EPS-HEP2019

10-17 July 2019
Ghent
Europe/Brussels timezone

## Comparison of direct and indirect constraints on anomalous tWb couplings

11 Jul 2019, 09:15
15m
ICC - Baeckeland 2 (Ghent)

### ICC - Baeckeland 2

#### Ghent

Parallel talk Top and Electroweak Physics

### Speaker

Anastasiia Kozachuk (Lomonosov Moscow State University)

### Description

We analyze constraints on anomalous tWb couplings that parameterize the possible contribution of New Physics to the weak tWb vertex. We take into account indirect constraints obtained from B-physics ($B\to X_s \gamma$, $B\to X_s l^+l^-$, $B$-$\bar B$ oscillations) and direct constraints from the t-channel single top quark production. In two-dimensional scenarios when different pairs of the anomalous couplings can vary whereas others are set to their SM values, the indirect and direct constraints are shown to nicely agree with each other. Combining both types of constraints narrows down the allowed ranges of the anomalous couplings.

### Primary authors

Anastasiia Kozachuk (Lomonosov Moscow State University) Dmitri Melikhov (HEPHY)