Conveners
Parallel Session: Phenomenology
- Fady Bishara (T (Phenomenology))
- Bibhushan Shakya (T (Cosmology))
- Elina Fuchs (CERN)
Parallel Session: Phenomenology
- Elina Fuchs (CERN)
- Fady Bishara (T (Phenomenology))
- Bibhushan Shakya (T (Cosmology))
Parallel Session: Phenomenology
- Bibhushan Shakya (T (Cosmology))
- Elina Fuchs (CERN)
- Fady Bishara (T (Phenomenology))
Parallel Session: Phenomenology
- Bibhushan Shakya (T (Cosmology))
- Fady Bishara (T (Phenomenology))
- Elina Fuchs (CERN)
In radiative seesaw models such as the famous scotogenic model, neutrino masses are generated through loop contributions involving dark matter (DM) particles. We study the capture of these DM candidates in the Sun as well as their subsequent annihilation into SM neutrinos and compute the expected event rates at IceCube in its 86-string configuration. In particular, in the scotogenic model the...
Coherent Elastic Neutrino Nucleus Scattering (CE$\nu$NS) provide a novel window to probe new physics connected with the well established non-vanishing neutrino masses. In this talk we will discuss how in the presence of a transition magnetic moment of neutrinos the CE𝜈NS experiments have the potential to shed light on the nature of neutrinos: Dirac vs Majorana. In particular, we will take the...
Light-cone distribution amplitudes (LCDAs) of light and heavy mesons are universal hadronic objects that form an essential part of factorization theorems for hard exclusive particle decays. These are relevant for precise calculations of Standard Model processes which play an important role in the search for New Physics. Like parton distribution functions, LCDAs are process-independent...
We derive correlation functions for massive fermions with a complex mass in the presence of a general vacuum angle. For this purpose, we first build the Green’s functions in the one-instanton background and then sum over the configurations of background instantons. The quantization of topological sectors follows for saddle points of finite Euclidean action in an infinite spacetime volume and...
We demonstrate the impact of non-perturbative effects on the Dark Matter (DM) production mechanism in simplified t-channel DM models. Specifically, we study the case of a Majorana fermion DM, coupled to the standard model (SM) quarks via a colored scalar.
For DM masses in the GeV-TeV range, direct detection experiments strongly constrain the DM coupling to the SM quarks. From a cosmological...
In this talk I will review how the anomalous magnetic moment of the muon and the B anomalies can be addressed by a combined explanation, by means of loop models characterized by minimal field content. Moreover, I will show how some of these model can also provide a viable DM candidate, accounting for the measured relic density while evading direct and indirect DM constraints.
Two-body non-leptonic $B$ decays with heavy-light final states, like $B_s \to D \pi$ and $B \to D K$, are among the theoretically cleanest non-leptonic decays as penguin loops do not contribute. They can be described using QCD factorization which relies on the heavy quark expansion. Advancing the theoretical calculations of such decays requires also a careful analysis of QED effects. In this...
The Minimal R-symmetric Supersymmetric Standard Model possesses interesting features, which makes it an attractive alternative to the MSSM. Some of them can be observed in and are reflected by the lepton flavour violation processes. Notably, there is no $\tan\beta$-enhancement for $g-2$ of the muon and other dipole operators, resulting in very different predictions for lepton observables...
Hierarchical masses of quarks and leptons are addressed by imposing horizontal symmetries. In supersymmetric Standard Models, the same symmetries play a role in suppressing flavor violating processes induced by supersymmetric particles. Combining the idea of spontaneous CP violation to control contributions to electric dipole moments (EDMs), the mass scale of supersymmetric particles can be...
Extensions of the two higgs doublet models with a singlet scalar can easily accommodate all current experimental constraints and are highly motivated candidates for Beyond Standard Model Physics. It can successfully provide a dark matter candidate, explain baryogenesis and provide gravitational wave signals. In this work, we focus on the dark matter phenomenology of the two higgs doublet model...
In this talk, I will discuss the one-loop correction to the static potential induced by photon, Z or W-boson exchange at tree-level for arbitrary SM multiplets. The correction is relevant, e.g., in the Sommerfeld effect calculation for heavy WIMP annihilation. We discuss the "Casimir-like" scaling of the result that makes the NLO correction a "low-energy" property of the SM gauge bosons....
We investigated stau-antistau annihilation into heavy quarks in the phenomenological MSSM within the DM@NLO collaboration. This SUSY-QCD precision calculation, enhanced by a QED Sommerfeld resummation, turned out to have several interesting applications: Claiming the lightest neutralino to be a main dark matter constituent, there are promising, non-excluded SUSY scenarios that...
We present a study of spin-2 mediated scalar dark matter. As a blueprint, we work in a warped extra-dimensional model such that the mediator(s) are the massive spin-2 Kaluza-Klein (KK) modes of the 5D graviton. On top of Standard Model particles, we focus on dark matter annihilations into KK-gravitons. Due to the longitudinal modes of the massive gravitons, any truncation of the KK-tower leads...
Long-lived particles appear in the Standard Model (SM) and are a common feature of its hidden sector extensions.
The accelerator phenomenology of such models is dominated by the often long-lived messenger fields, as they interact directly with the SM.
Portal effective field theories, extend the usual effective theories of the SM to include generic interactions with messenger fields to...
Hidden sector induced light meson transitions are a powerful probe for new physics at low-energy fixed target experiments such as NA62. To help study such interactions, we use the portal effective theory framework to construct a portal chiral perturbation theory at leading order that couples the light pseudoscalar mesons to a gauge-singlet messenger of spin 0, 1/2, or 1. We then compute...
In this proposed talk, we present a gauge-Higgs grand unification setup that employs 5D warped space with a SU(6) bulk gauge field that includes both a SU(5) grand unified theory (GUT) and a Higgs sector as a scalar component of the 5D vector field, solving the hierarchy problem. By appropriately breaking the gauge symmetry on the boundaries of the extra dimension the issue of light exotic new...
We examine phenomenological properties of a heavy axion by considering small size instanton effects coming from an additional axicolor non-Abelian gauge group. To properly take instanton effects into account, we develop a new method to derive and diagonalize the mass matrix of pseudoscalar fields of the theory. Applying our new method for theories without axicolor instanton effects leads to...
Axion-like particles (ALPs) are ubiquitous in models of new physics explaining some of the most
pressing puzzles of the Standard Model. However, until relatively recently, little attention has been
paid to its interplay with flavour. In this work, we study in detail the phenomenology of ALPs
that exclusively interact with up-type quarks at the tree-level, which arise in some...
The Standard Model (SM) suffers from five shortcomings: Dark Matter, Neutrino masses and mixing, Baryon asymmetry, Strong CP-Problem and Inflation. The latter is regarded as the seeds for structure formation. In this talk, we introduce an inflationary $\nu$DFSZ-type model which is dubbed 2hdSMASH(Two-Higgs-Doublet SMAxionSeesaw*Higgs-Portal-Inflation). 2hdSMASH aims at giving a complete and...
