Conveners
Particle Phenomenology session on Zoom and in Main Auditorium.
- Fady Bishara
Particle Phenomenology session on Zoom and in Main Auditorium.
- Bibhushan Shakya
Mr
Alejo Nahuel Rossia
(DESY, HU Berlin)
23/09/2020, 14:15
Particle Phenomenology
The lack of evidence of New Physics coming from direct searches of resonances at the LHC calls for an increase in efforts to devise new observables that can indirectly probe New Physics. Additionally, the future FCC-hh will make available new processes, inaccessible so far due to their low number of events. Studying the high transverse momentum distribution of diboson production processes at...
Mr
Sebastian Bruggisser
(ITP Heidelberg)
23/09/2020, 14:30
Particle Phenomenology
I will discuss a global analysis of Run II top measurements at the LHC in terms of dimension-6 operators. A distinctive feature of the top sector is the large number of four-fermion operators. This potentially leads to a large number of degeneracies. I will show in detail how those degeneracies can be resolved and how quadratic terms lead to stable limits on each of the Wilson coefficients.
Mr
Maximilian Dichtl
(TUM)
23/09/2020, 14:45
Particle Phenomenology
We present collider probes of the GRSMEFT, the most general effective field theory of gravity coupled to the SM of particle physics. In particular, we focus on graviton production in association with a jet, for which we derive the leading new-physics scattering amplitude, the expected cross section, and compare with missing energy searches at the LHC in order to bound the size of the relevant...
Ulserik Moldanazarova
(University of Liverpool)
23/09/2020, 15:00
Particle Phenomenology
In this talk we will discus the flavour violating four-fermion interactions and dipole interaction in models with extra heavy particles whose masses are
equal to or above the electro-weak scale.
We use the Becchi-Rouet-Stora-Tyutin symmetry to constrain tree-level couplings to construct perturbatively unitary theories, for which we calculate one-loop corrections.
We focus on the gauge...
Ms
Bianka Mecaj
(Johannes Gutenberg University)
23/09/2020, 15:15
Particle Phenomenology
Soft functions enter in factorization theorems in soft collinear effective field theory (SCET) and they capture the large distance effects of a process. They are defined as matrix elements of soft fields dressed by Wilson lines. While at leading order in power counting they are described by emissions of soft gauge bosons at sub-leading order one needs to consider emissions of soft fermions...
Dr
Wojciech Kotlarski
(TU - Dresden)
23/09/2020, 15:30
Particle Phenomenology
We present FlexibleDecay - a tool to calculate decays of scalars in arbitrary BSM models.
BSM effects are taken into account at the leading order - meaning that for loop induced decays all one-loop BSM contributions are automatically included.
In case of scalar and pseudoscalar Higgs boson decays the known higher order SM QED, QCD and EW effects are taken into account where possible....
Stefania Gori
(UCSC)
23/09/2020, 16:15
Kåre Fridell
(Technical University of Munich)
23/09/2020, 16:45
Particle Phenomenology
We investigate the possibility to probe lepton number violating (LNV) operators in the rare kaon decay $K\to\pi\nu\nu$. Performing the analysis in the Standard Model effective field theory with only light active Majorana neutrinos, we determine the current limits on the corresponding LNV physics scale from the past E949 experiment at BNL as well as the currently operating experiments NA62 at...
Mr
Rigo Bause
(TU Dortmund)
23/09/2020, 17:00
Particle Phenomenology
Rare $|\Delta c|=|\Delta u|=1$ processes are unique probes of flavour physics in the Standard Model (SM) and beyond and provide an excellent opportunity to analyse CP-violation and search for new physics (NP) due to their strong GIM-suppression in the SM.
Furthermore, a variety of null test observables is available for decays, such as $D\to \pi \ell^+ \ell^-$, $\ell = e,\,\mu$, and provide...
Mr
Marvin Schnubel
(Johannes Gutenberg-University Mainz)
23/09/2020, 17:15
Particle Phenomenology
Axionlike Particles (ALPs) appear in many well-motivated extensions of the Standard Model. Their lepton-flavor violating couplings can be probed in exotic muon and tau decays. When ALPs are produced resonantly, the sensitivity of three-body decays such as $\mu\to3e$ and $\tau\to3\mu$ exceeds that of radiative decays like $\mu\to e\gamma$ and $\tau\to\mu\gamma$ by multiple orders of magnitude....
Gonzalo Alonso Álvarez
(Heidelberg University)
23/09/2020, 17:30
Particle Phenomenology
The low-energy phenomenology of the QCD axion is usually studied in a model-independent way using an effective Lagrangian. However, one-loop processes that exhibit logarithmic divergencies are sensitive to the high-energy completion of each specific model. This is extremely important for some axion searches, like the ones conducted at Kaon facilities such as NA62 that aim to look for the rare...
Quentin Bonnefoy
(DESY)
23/09/2020, 17:45
Particle Phenomenology
I will revisit EFT couplings between an axion and massive gauge bosons. It is known that massive vectors allow for more freedom than massless ones when building an EFT, thanks to the existence of the non-linear realization of (gauge) symmetries. It is also known that such a non-linear realization must sometimes be used even to describe physics at energy scales above the electroweak vev, due to...
Ms
Clara Hormigos-Feliu
(TU Dortmund)
23/09/2020, 18:00
Particle Phenomenology
Standard Model extensions inspired by asymptotic safety generally contain vector-like fermions and singlet matrix scalar fields. Here we study several models where three generations of colorless vector-like fermions allow for portal Yukawa interactions
with leptons, leading to rich phenomenological implications. A novel feature is that the enlarged scalar sector, which also contains a Higgs...
