Conveners
BSM
- Ben Allanach (University of Cambridge (GB))
BSM
- Ben Allanach (University of Cambridge (GB))
BSM: Room C
- Claudia Hagedorn
BSM: Room C
- Valentina Cairo (CERN)
This talk will present an experimental overview of searches for New Physics performed through the interpretation of several results in Effective Field Theory frameworks. The emphasis will be on the most recent publications by the ATLAS and CMS collaborations, including Standard Model, Top, single Higgs and double Higgs analyses.
Vector boson scattering is a key production process to probe the electroweak symmetry breaking of the standard model, since it involves both self-couplings of vector bosons and coupling with the Higgs boson. If the Higgs mechanism is not the sole source of electroweak symmetry breaking, the scattering amplitude deviates from the standard model prediction at high scattering energy. Moreover,...
Supersymmetry (SUSY) provides elegant solutions to several problems in the Standard Model, and searches for SUSY particles are an important component of the LHC physics program. This talk will present the latest results from SUSY searches conducted by the ATLAS experiment. The searches target multiple final states and different assumptions about the decay mode of the produced SUSY particles,...
Many extensions of the standard model predict new particles with long lifetimes or other properties that give rise to non-conventional signatures in the detector. This talk discusses new techniques to detect such signatures in the CMS detector, and presents recent results from such searches in CMS using the full Run-II data-set of the LHC.
The discovery of the Higgs boson with the mass of 125 GeV confirmed the mass generation mechanism via spontaneous electroweak symmetry breaking and completed the particle content predicted by the Standard Model. Even though this model is well established and consistent with many experimental measurements, it is not capable of solely explaining some observations. Many extensions of the Standard...
Leptoquarks could naturally explain the relation between the quark and lepton sectors in terms of both the ordering and electric charge, the latter a result of SM fermions and leptoquarks being composed of common elementary constituents, or motivated by grand unified theories, in which quarks and leptons appear in common multiplets relating their charges and giving rise to transitions mediated...
Measurements of diboson and triboson production at the LHC probe the electroweak gauge structure of the Standard Model for contributions from anomalous couplings. In this talk recent ATLAS results on the measurement W boson pairs are presented. The measurement improves in precision compared to previous measurements, and is compared to theoretical predictions from fixed order calculation and...
We consider a type-I seesaw framework endowed with a flavour symmetry, belonging to the series of non-abelian groups Delta (3 n^2) and Delta (6 n^2), and a CP symmetry. Breaking these symmetries in a non-trivial way results in the right-handed neutrinos being degenerate in mass up to possible (further symmetry-breaking) splittings, while the neutrino Yukawa coupling matrix encodes the entire...
Measurements of diboson production in association with two additional jets at the LHC probe interactions between electroweak vector bosons predicted by the Standard Model and test contributions from anomalous quartic couplings. In this talk, the production of same-sign as well as opposite-sign WW production through vector boson scattering will be presented. Electroweak production of pairs of Z...
A wide variety of searches for Supersymmetry have been performed by experiments at the Large Hadron Collider. In this talk, we focus on searches for electroweak production of Supersymmetric particles and searches for Supersymmetric particles in compressed spectra. The results are obtained from the proton-proton collision data with luminosity up to 138 fb^{-1} at the center of mass energy of 13...
Although the Higgs boson discovered is so far compatible with the Standard Model Higgs boson, within the experimental uncertainties there is still room for BSM (such as 2HDM and NMSSM) which allow the presence of a Higgs boson with a mass lighter than the discovered Higgs boson. Some latest results of the searches for additional Higgs bosons with two photons included in the final state at CMS...
Many new physics models, e.g., compositeness, extra dimensions, extended Higgs sectors, supersymmetric theories, and dark sector extensions, are expected to manifest themselves in the final states with leptons and photons. This talk presents searches in CMS for new phenomena in the final states that include leptons and photons, focusing on the recent results obtained using the full Run-II...
Many new physics models predict the existence of new particles. This talk summarizes recent ATLAS searches for Beyond-the-Standard-Model heavy resonances which decay to pairs of bosons, heavy quarks, or leptons, using Run 2 data collected at the LHC. The experimental methods are explained, including the jet substructure techniques used in some searches to disentangle the hadronic decay...
In the Standard Model, the ground state of the Higgs field is not found at zero but instead corresponds to one of the degenerate solutions minimising the Higgs potential. In turn, this spontaneous electroweak symmetry breaking provides a mechanism for the mass generation of nearly all fundamental particles. The Standard Model makes a definite prediction for the Higgs boson self-coupling and...
