Conveners
PD1/PD3: Theoretical Developments / Physics Analyses
- Christopher Thomas Potter (University of Oregon (US))
- Akimasa Ishikawa (KEK)
- Roman Poeschl (Université Paris-Saclay (FR))
- Aleksander Filip Zarnecki (University of Warsaw)
- Shigeki Matsumoto (Kavli IPMU)
- Nathaniel Craig (UC Santa Barbara)
- Roberto Franceschini (Rome 3 U.)
- Jürgen Reuter (DESY Hamburg, Germany)
- Sven Heinemeyer (CSIC (Madrid, ES))
PD1/PD3: Theoretical Developments / Physics Analyses
- Roman Poeschl (Université Paris-Saclay (FR))
- Nathaniel Craig (UC Santa Barbara)
- Akimasa Ishikawa (KEK)
- Shigeki Matsumoto (Kavli IPMU)
- Jürgen Reuter (DESY Hamburg, Germany)
- Aleksander Filip Zarnecki (University of Warsaw)
- Roberto Franceschini (Rome 3 U.)
- Christopher Thomas Potter (University of Oregon (US))
- Sven Heinemeyer (CSIC (Madrid, ES))
PD1/PD3: Theoretical Developments / Physics Analyses
- Sven Heinemeyer (CSIC (Madrid, ES))
- Christopher Thomas Potter (University of Oregon (US))
- Roman Poeschl (Université Paris-Saclay (FR))
- Akimasa Ishikawa (KEK)
- Jürgen Reuter (DESY Hamburg, Germany)
- Roberto Franceschini (Rome 3 U.)
- Nathaniel Craig (UC Santa Barbara)
- Shigeki Matsumoto (Kavli IPMU)
- Aleksander Filip Zarnecki (University of Warsaw)
We present the current status of the assessment of the theoretical issues involved in reaching the targeted 0.01% precision for the FCC-ee/LC luminosity prediction. We also discuss its synergies with other precision theory requirements and efforts for the FCC-ee/LC physics programs.
While the Standard Model (SM) predicts a branching ratio of the Higgs boson decaying to invisible particles of O(0.001), the current measurement of the Higgs boson coupling to other SM particles allows for up to 20% of the Higgs boson width to originate from decays beyond the SM (BSM). The small SM-allowed rate of Higgs boson decays to invisible particles can be enhanced if the Higgs boson...
The matter-antimatter asymmetry of the universe may result at least partially from CP violation. CP violation in mesons and neutrinos is too small to account for matter-antimatter asymmetry, motivating a search for CP violation in the Higgs sector. We present a study of the potential measurement of CP symmetry of the Higgs boson at the International Linear Collider (ILC) by the SiD experiment....
We examine the region of the parameter space of the Next to Minimal
Supersymmetric Standard Model (NMSSM) and the Minimal Supersymmetric Standard Model~(MSSM) with a light neutralino~($M_{\tilde{\chi}_1^0} \leq$~62.5~GeV) where the SM-like Higgs boson can decay invisibly, the thermal neutralino relic density is smaller than the measured cold dark
matter~(DM) relic density, and where...
We investigate a scenario inspired by natural supersymmetry, where neutrino data is explained within a low-scale seesaw scenario. For this the Minimal Supersymmetric Standard Model is extended by adding light right-handed neutrinos and their superpartners, the R-sneutrinos. Moreover, we consider the lightest neutralinos to be higgsino-like. We first update a previous analysis and assess to...
Right handed neutrino is proposed as the extended of SM. We consider the possibility of exploring the RHN at ILC500. We study the RHN pair production using Delphes mini-DST.
Sophisticated machine learning techniques have promising potential in search for physics beyond Standard Model (BSM) in Large Hadron Collider (LHC). Convolutional neural networks (CNN) can provide powerful tools for differentiating between patterns of calorimeter energy deposits by prompt particles of Standard Model and long-lived particles predicted in various models beyond the Standard...
Extended Higgs models with CP violation have a possibility to solve the baryon number asymmetry of the universe by electroweak baryogenesis. However, the electric dipole moment (EDM), which is highly sensitive to new CP-violating effects, has not been observed so far. In this talk, we consider the testability of CP violation of a scenario in which the EDM is suppressed by cancellation among...
We study the search for an extra scalar S boson produced in association with the Z boson at the
International Linear Collider (ILC). The study is performed at center-of-mass energies of 250
GeV and 500 GeV based on the full simulation of the International Large Detector (ILD). In
order to be as model-independent as possible, the analysis uses the recoil technique, in particular
with the Z...
The Compact LInear Collider (CLIC) is a proposed TeV-scale high-luminosity electron-positron collider at CERN. CLIC will allow us to study the Higgs boson properties with very high precision. These measurements can also result in a direct or indirect discovery of "new physics", Beyond the Standard Model (BSM) phenomena, which could help us to understand the nature of dark matter (DM). SM-like...
One of the primary goals of the proposed future collider experiments is to search for dark matter (DM) particles using different experimental approaches. High energy $e^+e^-$ colliders offer unique possibility for the most general search based on the mono-photon signature. As any $e^+e^-$ scattering process can be accompanied by a hard photon emission from the initial state radiation, analysis...
It is commonly believed that Dark Matter (DM) should exist in the form of new, Beyond-the-Standard-Model stable particles.
Such particles, however, have not yet been detected, which means that interactions between DM and SM must be very weak. Dark particles, even if they are already produced at existing colliders, evade detection due to tiny signal-to-background ratio.
Future $e^+e^-$...
A new method is presented to extract quark masses from collider data on Higgs production and decay rates. We find a value for the bottom quark MSbar mass at the scale of the Higgs boson mass of mb(mh) = 2.6 +/- 0.3 GeV from recent measurements by ATLAS and CMS. This result is compatible with the prediction of mb(mh) from the evolution of the world average for mb(mb) and thus provides further...
The violation of the CP symmetry is one of Sakharov's conditions for the matter/anti-matter asymmetry of the Universe. Currently known sources of CP violation in the quark and neutrino sectors are insufficient to account for this. Is CP also violated in the Higgs sector? Could the 125 GeV mass eigenstate be a mixture of even and odd CP states of an extended Higgs sector, or is CP explicitly...
Neutrinos are probably the most mysterious particles of the Standard Model. The mass hierarchy and oscillations, as well as the nature of their antiparticles, are being currently studied in experiments around the world. Moreover, in many models of the New Physics, baryon asymmetry or dark matter density in the universe are explained by introducing new species of neutrinos. Among others, heavy...
Future e+e- colliders are prime tools to search for physics Beyond the Standard Model charged under the electroweak force only. A particular example are scalar partners of the charged leptons, known as sleptons in supersymmetric extensions of the Standard Model. The decays of such scalar lepton partners involve additional neutral fermions (neutralinos in supersymmetric models), which are good...
A study of prospects for SUSY based on scanning the relevant
parameter space of (weak-scale) SUSY parameters, is presented. In
particular, I concentrate on the properties most relevant to evaluate
the experimental prospects: mass differences lifetimes and decay-modes.
A scan over SUSY parameter space was done, requiring that the NLSP
was a bosino or a stau - the hardest cases - with mass...
Like at the LHC, tests of neutrino mass models will constitute a leading component of the new physics programs at proposed experiments such as the ILC, CepC/CppC, and FCC-ee/hh. This challenge requires the engineering of new search strategies, employing novel production mechanisms, and ultimately the development of Monte Carlo (MC) simulation software that feed into modern simulation tool...
