Presentation materials
This talk will discuss the physics program and detector set-up of the proposed SHiP experiment at the SPS at CERN, Geneva,
Switzerland. The SHiP experiment is a proposal for a new general-purpose fixed target facility to search for hidden particles as predicted by a very large number of recently elaborated models of Hidden Sectors which are capable of accommodating dark matter, neutrino...
Dark photons appear in many well-motivated dark matter scenarios, which leads to a worldwide effort to search for them. In this talk, I will present two novel search methods for dark photons at the LHCb experiment. One is an exclusive search in charm meson decay, and the other is a fully data-driven inclusive search based on di-muon resonances. These searches advance particle physics by...
Kinetic mixing is a common and well motivated phenomenon in BSM theories that can naturally provide a weak interaction between the standard model and new physics. Nonabelian kinetic mixing necessarily introduces a new mass scale which is related to the kinetic mixing strength. In this talk I will show that this mass scale - mixing strength relationship maps the parameter space relevant to...
LEP measurements of the Z width highly constrain new electroweak states with masses less than half the Z mass. Therefore, in this work we consider effective operators involving a fermionic dark matter which contribute to the Z invisible width only at loop level. How FCC-ee projections compare to direct detection bounds within these models will be the primary focus of the discussion. Possible...
A light sub-GeV Higgs that can accommodate muon g-2 anomaly can be probed in various low energy experiments, such as muon decay, charged kaon decays, etc. I will first discuss it in a model-independent way and then provide a concrete UV model where the light scalar can be realized. The proposed muon electric dipole moment will also have a sensitivity to some part of parameter space. Lepton...
There has recently been a proposal to build a new detector at the Large Hadron Collider to search for so called 'milli-charged' particles. This experiment would search for particles beyond the standard model with masses up to 100GeV, and fractional electric charges as low as 0.001 that of the electron. In this talk, I will motivate the possible existence of milli-charged particles via kinetic...
Results of searches for both prompt and non-prompt leptonic decays of new
dark sector particles in proton-proton collisions with the ATLAS detector
are presented. Searches that encompass a wide range of new particle masses,
lifetimes and degrees of collimation of leptonic decay products are discussed.
The results are interpreted in the context of models containing new gauge
bosons (dark...
The idea that dark matter forms part of a larger dark sector is very intriguing, given the high degree of complexity of the visible sector. In this talk, we discuss lepton jets as a promising signature of an extended dark sector. As a simple toy model, we consider an O(GeV) DM fermion coupled to a new U(1)′ gauge boson (dark photon) with a mass of order GeV and kinetically mixed with the...
