Conveners
New Physics
- Myron Campbell (High Energy Physics)
Heavy neutral leptons (HNLs) with masses below the electroweak scale offer a testable explanation for observed masses and mixings of active neutrinos. Moreover, at the same time, they could be responsible for the generation of the baryon asymmetry of the Universe.
We describe production and decay channels of such HNLs. We demonstrate that some additional information (Dirac vs Majorana...
The high-intensity setup, trigger system flexibility, and detector performance – high-frequency tracking of beam particles, redundant PID, ultra-high-efficiency photon vetoes – make NA62 particularly suitable for searching for new-physics effects from different scenarios. We report the results of a search for π0 decays to one photon and an invisible massive dark photon. From a total of about...
The Belle II experiment at the SuperKEKB energy-asymmetric $e^+ e^-$ collider is a substantial upgrade of the B factory facility at the Japanese KEK laboratory. The design luminosity of the machine is $8\times 10^{35}$ cm$^{-2}$s$^{-1}$ and the Belle II experiment aims to record 50 ab$^{-1}$ of data, a factor of 50 more than its predecessor. From February to July 2018, the machine has...
The features of the NA62 experiment at the CERN SPS - high-intensity setup, trigger-system flexibility, high-frequency tracking of beam particles, redundant particle identification, and
ultra-high-efficiency photon vetoes - make NA62 particularly suitable to search for long-lived, weakly-coupled particles within Beyond the Standard Model (BSM) physics.
Searches for Heavy Neutral Lepton (HNL)...
Light feebly interacting particles (axions/ALPs, HNLs, Dark Photons, Dark Scalars) represent an alternative paradigm to the current lore of strongly coupled New Physics at the TeV scale and are getting an increasing attention within the accelerator-based communities.
I will review the experimental prospects for their searches at beam dump, fixed-target, and collider-based experiments.
