385 citations · 2.3k across the 47 of their papers we have counts for
47 papers
Testing Heavy Neutral Leptons in Cosmic Ray Beam Dump experiments
Oliver Fischer, Baibhab Pattnaik, José Zurita
In this work, we discuss the possibility to test Heavy Neutral Leptons (HNLs) using Cosmic Ray Beam Dump experiments. In analogy with terrestrial beam dump experiments, wher…
The Development of Energy-Recovery Linacs
Chris Adolphsen, Kevin Andre, Deepa Angal-Kalinin +46
Energy-recovery linacs (ERLs) have been emphasised by the recent (2020) update of the European Strategy for Particle Physics as one of the most promising technologies for the accel…
Recent Progress and Next Steps for the MATHUSLA LLP Detector
Cristiano Alpigiani, Juan Carlos Arteaga-Velázquez, Austin Ball +93
We report on recent progress and next steps in the design of the proposed MATHUSLA Long Lived Particle (LLP) detector for the HL-LHC as part of the Snowmass 2021 process. Our under…
-mediated Majorana dark matter: suppressed direct-detection rate and complementarity of LHC searches
T. Alanne, F. Bishara, J. Fiaschi +3
We study the direct-detection rate for axial-vectorial dark matter scattering off nuclei in an invariant effective theory and compare it agains…
An Experiment for Electron-Hadron Scattering at the LHC
K. D. J. André, L. Aperio Bella, N. Armesto +23
Novel considerations are presented on the physics, apparatus and accelerator designs for a future, luminous, energy frontier electron-hadron () scattering experiment at the LHC…
Explaining excesses in four-leptons at the LHC with a double peak from a CP violating Two Higgs Doublet Model
Stefan Antusch, Oliver Fischer, A. Hammad +1
Extended scalar sectors with additional degrees of freedom appear in many scenarios beyond the Standard Model. Heavy scalar resonances that interact with the neutral current could…
Robustness of ARS Leptogenesis in Scalar Extensions
Oliver Fischer, Manfred Lindner, Susan van der Woude
Extensions of the Standard Model (SM) with sterile neutrinos are well motivated from the observed oscillations of the light neutrinos and they have shown to successfully explain th…
Unveiling Hidden Physics at the LHC
Oliver Fischer, Bruce Mellado, Stefan Antusch +30
The field of particle physics is at the crossroads. The discovery of a Higgs-like boson completed the Standard Model (SM), but the lacking observation of convincing resonances Beyo…
Displaced Neutrino Jets at the LHeC
Giovanna Cottin, Oliver Fischer, Sanjoy Mandal +2
Extending the Standard Model with right-handed neutrinos (RHNs) is well motivated by the observation of neutrino oscillations. In the type-I seesaw model, the RHNs interact with th…
Avenues to new-physics searches in cosmic ray air showers
Oliver Fischer, Maximilian Reininghaus, Ralf Ulrich
Cosmic Rays (CR) impinging on the terrestrial atmosphere provide a viable opportunity to study new physics in hadron-nucleus collisions at energies covering many orders of magnitud…
Testing the Anomaly at the LHeC
Georges Azuelos, Oliver Fischer, Sudip Jana
B-Physics anomalies have recently raised renewed interest in leptoquarks (LQ), predicted in several theoretical frameworks. Under simplifying but conservative assumptions, we show…
Testing CP Properties of Extra Higgs States at the HL-LHC
Stefan Antusch, Oliver Fischer, A. Hammad +1
Extra Higgs states appear in various scenarios beyond the current Standard Model of elementary particles. If discovered at the LHC or future colliders, the question will arise whet…
An Update to the Letter of Intent for MATHUSLA: Search for Long-Lived Particles at the HL-LHC
Cristiano Alpigiani, Juan Carlos Arteaga-Velázquez, Austin Ball +80
We report on recent progress in the design of the proposed MATHUSLA Long Lived Particle (LLP) detector for the HL-LHC, updating the information in the original Letter of Intent (Lo…
Exotic Higgs decays into displaced jets at the LHeC
Kingman Cheung, Oliver Fischer, Zeren Simon Wang +1
Profiling the Higgs boson requires the study of its non-standard decay modes. In this work we discuss the prospects of the Large Hadron electron Collider (LHeC) to detect scalar pa…
Model Independent Bounds on the Non-Oscillatory Explanations of the MiniBooNE Excess
Vedran Brdar, Oliver Fischer, Alexei Yu. Smirnov
We consider the non-oscillatory explanations of the low energy excess of events detected by MiniBooNE. We present a systematic search for phenomenological scenarios based on new ph…
Explaining the MiniBooNE excess by a decaying sterile neutrino with mass in the 250 MeV range
Oliver Fischer, Alvaro Hernandez-Cabezudo, Thomas Schwetz
The MiniBooNE collaboration has reported an excess of electron-like events (). We propose an explanation of these events in terms of a sterile neutrino decayi…
Searching for Dark Photons at the LHeC and FCC-he
Monica D'Onofrio, Oliver Fischer, Zeren Simon Wang
Extensions of the Standard Model (SM) gauge group with a new predict an additional gauge boson. Through kinetic mixing with the SM photons featured by a coupling , the…
Lepton-Trijet and Displaced Vertex Searches for Heavy Neutrinos at Future Electron-Proton Colliders
Stefan Antusch, Oliver Fischer, A. Hammad
Electron proton (ep) colliders could provide particle collisions at TeV energies with large data rates while maintaining the clean and pile~up-free environment of lepton colliders,…
Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider
Juliette Alimena, James Beacham, Martino Borsato +198
Particles beyond the Standard Model (SM) can generically have lifetimes that are long compared to SM particles at the weak scale. When produced at experiments such as the Large Had…
Future Opportunities in Accelerator-based Neutrino Physics
Andrea Dell'Acqua, Antoni Aduszkiewicz, Markus Ahlers +140
This document summarizes the conclusions of the Neutrino Town Meeting held at CERN in October 2018 to review the neutrino field at large with the aim of defining a strategy for acc…
MATHUSLA: A Detector Proposal to Explore the Lifetime Frontier at the HL-LHC
Henry Lubatti, Cristiano Alpigiani, Juan Carlos Arteaga-Velázquez +60
The observation of long-lived particles at the LHC would reveal physics beyond the Standard Model, could account for the many open issues in our understanding of our universe, and…
Closing the light gluino gap with electron-proton colliders
David Curtin, Kaustubh Deshpande, Oliver Fischer +1
The future electron-proton collider proposals, LHeC and FCC-he, can deliver (TeV) center-of-mass energy collisions, higher than most of the proposed lepton accelerator…
Low scale type II seesaw: Present constraints and prospects for displaced vertex searches
Stefan Antusch, Oliver Fischer, A. Hammad +1
The type II seesaw mechanism is an attractive way to generate the observed light neutrino masses. It postulates a SU(2)-triplet scalar field, which develops an induced…
A Letter of Intent for MATHUSLA: a dedicated displaced vertex detector above ATLAS or CMS
Cristiano Alpigiani, Austin Ball, Liron Barak +61
In this Letter of Intent (LOI) we propose the construction of MATHUSLA (MAssive Timing Hodoscope for Ultra-Stable neutraL pArticles), a dedicated large-volume displaced vertex dete…