Conveners
Energy frontier physics beyond the standard model
- Christophe Grojean (DESY (Hamburg) and Humboldt University (Berlin))
- Marumi Kado
- Michele Gallinaro (LIP)
Energy frontier physics beyond the standard model
- Marumi Kado
- Michele Gallinaro (LIP)
- Christophe Grojean (DESY (Hamburg) and Humboldt University (Berlin))
Description
Information for speakers about talk's duration:
30 min slot= 25 to speak + 5 for questions
25 min slot= 20 to speak + 5 for questions
Experimental prospects for BSM searches at the LHC.
The discovery of the Higgs boson with the mass of 125 GeV completed the particle content predicted by the Standard Model. Even though this model is well established and consistent with many measurements, it is not capable to solely explain some observations. Many extensions of the Standard Model addressing such shortcomings introduce additional Higgs-like bosons which can be either neutral,...
The direct production of electroweak SUSY particles, including sleptons, charginos, and neutralinos, is a particularly interesting area of search at the LHC. While the lightest neutralino is a well motivated and studied candidate for dark matter in models with R-parity conservation, the small production cross sections of electroweak production leads to difficult searches. This talk will...
The most recent results of searches for supersymmetric (SUSY) particles produced via strong interaction, as well as for SUSY particles of the third generation, will be presented. The analyses are performed by the ATLAS and CMS Collaborations and are based on the full data set of proton-proton collisions collected during the Run 2 of the LHC.
Although the LHC experiments have searched for and excluded many proposed new particles up to masses close to 1 TeV, there are many scenarios that are difficult to address at a hadron collider. This talk will review a number of these scenarios and present the expectations for searches at an electron-positron collider such as the International Linear Collider. The cases discussed include the...
The International Linear Collider offers a number of unique opportunities for searches for dark matter and dark sector particles. The collider program will offer important capabilities, but also, the ILC will enable new fixed-target experiments using the high-energy electron and positron beams, both beam dump experiments and dedicated experiments using single beams. This talk will describe...
The presence of a non-baryonic Dark Matter (DM) component in the Universe is inferred from the observation of its gravitational interaction. If Dark Matter interacts weakly with the Standard Model (SM) it could be produced at the LHC. The ATLAS and CMS experiments have developed a broad search program for DM candidates, including resonance searches for the mediator which would couple DM to the...
We constrain the Higgs-portal model employing the vector-boson fusion channel at the LHC. In particular, we include the phenomenologically interesting parameter region near the Higgs resonance, where the Higgs-boson mass is close to the threshold for dark-matter production and a running-width prescription has to be employed for the Higgs-boson propagator. Limits for the Higgs-portal coupling...
TBA
Leptoquarks and Heavy Vector Boson searches covering all LHC experiments.
We consider a simple extension of the electroweak theory, incorporating one $SU(2)_L$ doublet of
colour-octet scalars with Yukawa couplings satisfying the principle of minimal flavour violation.
Using the HEPfit package, we perform a global fit to the available data, including all relevant theoretical constraints, and extract the current bounds on the model parameters. Coloured scalars with...
TBA
Searches for Axion-like particles covering all LHC experiments.
Models beyond the SM predict new particles with a wide range of lifetimes. The weak-scale particles can get a long lifetime which lead to unconventional signatures in the detector with respect to these from prompt decays, often requiring customized techniques to trigger and identify them. The CMS experiment puts a growing effort to expand the reach for long-lived signals. During the talk,...
Various theories beyond the Standard Model predict unique signatures that are difficult to reconstruct and for which estimating the background rate is also a challenge. Signatures from displaced decays anywhere from the inner detector to the muon spectrometer, as well as those of new particles with fractional or multiple values of the charge of the electron or high mass stable charged...
The Gamma Factory is a proposal to back-scatter laser photons off a beam of partially-stripped ions at the LHC, producing a beam of $\sim 10$ MeV to $1$ GeV photons with intensities of $10^{16}$ to $10^{18}~\text{s}^{-1}$. This implies $\sim 10^{23}$ to $10^{25}$ photons on target per year, many orders of magnitude greater than existing accelerator light sources and also far greater than all...
Many extensions to the Standard Model predict new phenomena occurring at high mass. These include new scalar or vector resonances, as well as new heavy fermions. This talk will summarize recent searches for such heavy particles based on 13 TeV pp collision data collected by the ATLAS and CMS experiments at the LHC. They cover new heavy resonances decaying into dibosons (including W, Z, photon,...
