Publications by Jean-Loup Tastet

The present and future status of heavy neutral leptons

Alexey Boyarsky, Oleg Ruchayskiy, Lesya Shchutska, Marco Drewes, Jean-Loup Tastet, Inar Timiryasov, Juraj Klaric

The existence of nonzero neutrino masses points to the likely existence of multiple Standard Model neutral fermions. When such states are heavy enough that they cannot be produced in oscillations, they are referred to as heavy neutral leptons (HNLs). In th ...

2022

Sensitivity of the SHiP experiment to dark photons decaying to a pair of charged particles

Aurelio Bay, Mikhail Chapochnikov, Guido Haefeli, Alexey Boyarsky, Hans Dijkstra, Alexandre Emmanuel Grandchamp, Oleg Ruchayskiy, Lesya Shchutska, Nikolaos Charitonidis, Jean-Loup Tastet, Sergei Smirnov, Anton Petrov, Inar Timiryasov, Maria Elena Stramaglia, Ana Bárbara Rodrigues Cavalcante, Federico Leo Redi, Elena Graverini, Ekaterina Kuznetsova

Dark photons are hypothetical massive vector particles that could mix with ordinary photons. The simplest theoretical model is fully characterised by only two parameters: the mass of the dark photon m(gamma)D and its mixing parameter with the photon, epsil ...

2021

Reinterpreting the ATLAS bounds on heavy neutral leptons in a realistic neutrino oscillation model

Jean-Loup Tastet, Inar Timiryasov

Heavy neutral leptons (HNLs) are hypothetical particles, motivated in the first place by their ability to explain neutrino oscillations. Experimental searches for HNLs are typically conducted under the assumption of a single HNL mixing with a single neutri ...

Springer Nature2021

Measurement of the muon flux from 400 GeV/c protons interacting in a thick molybdenum/tungsten target

Aurelio Bay, Mikhail Chapochnikov, Guido Haefeli, Alexey Boyarsky, Hans Dijkstra, Alexandre Emmanuel Grandchamp, Oleg Ruchayskiy, Lesya Shchutska, Nikolaos Charitonidis, Jean-Loup Tastet, Sergei Smirnov, Anton Petrov, Inar Timiryasov, Maria Elena Stramaglia, Ana Bárbara Rodrigues Cavalcante, Federico Leo Redi, Elena Graverini, Ekaterina Kuznetsova

The SHiP experiment is proposed to search for very weakly interacting particles beyond the Standard Model which are produced in a 400 GeV/c proton beam dump at the CERN SPS. About 1011muons per spill will be produced in the dump. To design the experiment s ...

2020

The magnet of the scattering and neutrino detector for the SHiP experiment at CERN

Sebastian Gerlach, Aurelio Bay, Mikhail Chapochnikov, Guido Haefeli, Alexey Boyarsky, Hans Dijkstra, Sun Hee Kim, Alexandre Emmanuel Grandchamp, Oleg Ruchayskiy, Lesya Shchutska, Nikolaos Charitonidis, Jean-Loup Tastet, Sergei Smirnov, Anton Petrov, Inar Timiryasov, Maria Elena Stramaglia, Ana Bárbara Rodrigues Cavalcante, Federico Leo Redi, Elena Graverini, Ekaterina Kuznetsova

The Search for Hidden Particles (SHiP) experiment proposal at CERN demands a dedicated dipole magnet for its scattering and neutrino detector. This requires a very large volume to be uniformly magnetized at B > 1.2 T, with constraints regarding the inner i ...

2020

Fast simulation of muons produced at the SHiP experiment using Generative Adversarial Networks

Sebastian Gerlach, Aurelio Bay, Mikhail Chapochnikov, Guido Haefeli, Alexey Boyarsky, Hans Dijkstra, Sun Hee Kim, Alexandre Emmanuel Grandchamp, Oleg Ruchayskiy, Lesya Shchutska, Nikolaos Charitonidis, Jean-Loup Tastet, Sergei Smirnov, Anton Petrov, Inar Timiryasov, Maria Elena Stramaglia, Ana Bárbara Rodrigues Cavalcante, Federico Leo Redi, Elena Graverini, Ekaterina Kuznetsova

This paper presents a fast approach to simulating muons produced in interactions of the SPS proton beams with the target of the SHiP experiment. The SHIP experiment will be able to search for new long-lived particles produced in a 400 GeV/c SPS proton beam ...

2019

Sensitivity of the SHiP experiment to Heavy Neutral Leptons

Florian Maria Wurm, Aurelio Bay, Mikhail Chapochnikov, Guido Haefeli, Alexey Boyarsky, Hans Dijkstra, Sun Hee Kim, Oleg Ruchayskiy, Nathalie Sophie Adeline Serra, Lesya Shchutska, Adriano Pastore, Nikolaos Charitonidis, Johannes Richard Cornelis Geerit Kruis, Erica Manfredi, Sargis Hakobyan, Eirini Koukovini Platia, Jean-Loup Tastet, Sergei Smirnov, Anton Petrov, Inar Timiryasov, Maria Elena Stramaglia, Federico Leo Redi, Elena Graverini, Ekaterina Kuznetsova

Heavy Neutral Leptons (HNLs) are hypothetical particles predicted by many extensions of the Standard Model. These particles can, among other things, explain the origin of neutrino masses, generate the observed matter-antimatter asymmetry in the Universe an ...

Springer Nature2019

The experimental facility for the Search for Hidden Particles at the CERN SPS

Aurelio Bay, Mikhail Chapochnikov, Guido Haefeli, Alexey Boyarsky, Hans Dijkstra, Sun Hee Kim, Alexandre Emmanuel Grandchamp, Oleg Ruchayskiy, Lesya Shchutska, Nikolaos Charitonidis, Jean-Loup Tastet, Sergei Smirnov, Anton Petrov, Inar Timiryasov, Maria Elena Stramaglia, Ana Bárbara Rodrigues Cavalcante, Federico Leo Redi, Elena Graverini, Ekaterina Kuznetsova

The Search for Hidden Particles (SHiP) Collaboration has shown that the CERN SPS accelerator with its 400 GeV/c proton beam offers a unique opportunity to explore the Hidden Sector [1-3]. The proposed experiment is an intensity frontier experiment which is ...

2019