Conveners
Parallel Session Wednesday: Phenomenology I
- Mathieu Pellen (University of Freiburg)
Parallel Session Wednesday: Phenomenology II
- Mathieu Pellen (University of Freiburg)
In order to obtain reliable theoretical predictions for collider physics, radiative corrections have to be computed and taken into account in Monte Carlo simulations. In particular, at high energies, electroweak (EW) radiative corrections are dominated by the so-called EW Sudakov logarithms, which are negative and large in absolute value. In this talk I will present a revisitation of the...
We will discuss a novel framework for addressing QCD factorization in the emission of multiple soft or collinear partons. The purpose of this discussion is to allow for a more precise description of hadron collider data and to better handle theoretical uncertainties from parton showers.
We have developed a power counting algorithm in emission amplitudes with the goal of parameterizing the...
One of the simplest extensions of the Standard Model (SM) Higgs sector is the Higgs singlet extension in which one adds a singlet to the particle content of the SM. Such models are being studied at the LHC. In the simplest realization of this model, in which the singlet is real, there are two Higgs bosons and only three new parameters, two mixing angles and the mass of the additional Higgs...
The investigation of the trilinear self-coupling of the discovered Higgs boson is one of the main goals of particle physics in the near future.
We provide predictions for this coupling, expressed in terms of the coupling modifier $\kappa_\lambda$, incorporating one-loop corrections within arbitrary renormalizable QFTs.
The presented framework allows to apply a wide class of pre- and...
My talk will focus on the calculation of the NNLO contributions to
$b\rightarrow c$ decays with full charm mass dependence. For the
semileptonic decay channel $b \rightarrow cl\overline{\nu}$, we obtain
an analytic result which can be compared to previous known results
obtained via expansions in the mass ratio $m_c/m_b$.
I will also give an outlook on the calculation of the hadronic...
Factorization theorems are known to be extremely powerful tools in high-energy particle physics. Processes like SIDIS, Drell-Yan vector-boson production, Higgs-boson production through gluon fusion and $e^+e^-$ to jets and/or hadrons are just some examples of processes that have been thoroughly investigated by applying rigorous factorization formulae. Furthermore, if in these processes the...
The production of a single top quark in association with a $\mathrm{Z}$ boson ($\mathrm{tZj}$ production) at the LHC is a relevant probe of the electroweak sector of the Standard Model as well as a window to possible new-physics effects. The growing experimental interest in performing differential measurements for this process demands an improved theoretical modelling in realistic fiducial...
In this talk we present results for soft gluon threshold resummation applied to the production of four top quarks. Current theoretical predictions include next-to-leading (NLO) strong and electroweak corrections, yielding a relatively large associated systematic error. By considering the matching of the next-to-leading logarithmic (NLL) result to the available NLO result, we achieve...
We calculate the one-loop corrections to the soft anomalous dimension matrices for the production of a top-antitop quark pair in association with a jet at hadron colliders. This is a step forward towards implementing a procedure for the resummation of soft-gluon emission logarithms for the $t\bar{t}j + X$ hadroproduction process, that will enable the improvement of the accuracy of the...
Soft functions are universal hadronic matrix elements that appear in factorization theorems for hard exclusive and inclusive processes and contain non-perturbative information about the partonic structure and soft interactions of the particles involved. As such, they form an important ingredient for precision calculations in the Standard Model. The soft function for a heavy meson is...
Motivated by the long-standing hints of lepton-flavour non-universality in the $b\longrightarrow c\ell\nu$ and $b\longrightarrow s\ell^+\ell^-$ channels, we study Drell-Yan production at the Large Hadron Collider (LHC) in the context of leptoquarks (LQs). Based on the latest LHC dilepton analyses
corresponding to an integrated luminosity of around $140\,\mathrm{fb}^{−1}$ of proton-proton...
We present a new minimal flavor violation (MFV) scenario in which the up-type quark dipole coupling matrices $C_{uV}^{ij}$, $V=W$ or $B$, are not only diagonal in the mass eigenbasis but also have the eigenvalues that are inversely proportional to the quark masses. Namely, $C_{uV}^{11}$ is the largest Wilson coefficient in the three families. We analyze several aspects of this 'inverse...
Leptoquarks are particles that simultaneously carry lepton and baryon number, and appear in many extensions of the Standard Model (SM). The appearance of so-called flavour anomalies has led to increased interest in leptoquark models which are known to mitigate the tensions between theoretical expectations and experimental measurements.
I will present a next-to-leading order (NLO)...
I will present our recent work (arXiv:2204.13605 [hep-ph]) based on a hybrid Type-II seesaw/scotogenic model supplemented with a discrete flavour symmetry where CP is dynamically generated by the vacuum. Namely, we analyse compatibility with low-energy neutrino observables, review the charged lepton flavour violation implications and study the scalar and fermionic dark matter phenomenology of...
