Outputs (46)

Generalised hydrogen interactions with CINCO: a window to new physics (2024)
Journal Article
Bauer, M., Perez-Soler, J., & Shergold, J. D. (2024). Generalised hydrogen interactions with CINCO: a window to new physics. Journal of High Energy Physics, 2024(10), Article 176. https://doi.org/10.1007/jhep10%282024%29176

We present semi-analytic solutions for atomic transition rates in hydrogenic atoms induced by scalar, pseudoscalar, vector, axial-vector, and tensor interactions. Our results agree with quantum electrodynamics predictions to ~ 0.005 % precision, and... Read More about Generalised hydrogen interactions with CINCO: a window to new physics.

Fifth Forces from QCD Axions Scale Differently. (2024)
Journal Article
Bauer, M., & Rostagni, G. (2024). Fifth Forces from QCD Axions Scale Differently. Physical Review Letters, 132(10), Article 101802. https://doi.org/10.1103/PhysRevLett.132.101802

We reexamine the low-energy potential for a macroscopic fifth force generated from the exchange of two axions. The shift symmetry of the linear axion interactions leads to a potential falling off as V(r)∼1/r^{5}. We find that in the case of the QCD a... Read More about Fifth Forces from QCD Axions Scale Differently..

How to measure the spin of invisible states in e + e − → γ + X (2023)
Journal Article
Bauer, M., & Nordahl Erner, S. (2023). How to measure the spin of invisible states in e + e − → γ + X. Physical Review D, 108, Article 115013. https://doi.org/10.1103/PhysRevD.108.115013

We examine the production of an invisible state X together with a photon, eþe− → γ þ X, at electron positron colliders and present measurement strategies that can detect the spin of the invisible state as well as the underlying production mechanism,... Read More about How to measure the spin of invisible states in e + e − → γ + X.

Limits on the cosmic neutrino background (2023)
Journal Article
Bauer, M., & Shergold, J. D. (2023). Limits on the cosmic neutrino background. Journal of Cosmology and Astroparticle Physics, 2023(01), Article 003. https://doi.org/10.1088/1475-7516/2023/01/003

We present the first comprehensive discussion of constraints on the cosmic neutrino background (CνB) overdensity, including theoretical, experimental and cosmological limits for a wide range of neutrino masses and temperatures. Additionally, we calcu... Read More about Limits on the cosmic neutrino background.

Axion-Higgs portal (2023)
Journal Article
Bauer, M., Rostagni, G., & Spinner, J. (2023). Axion-Higgs portal. Physical Review D, 107(1), Article 015007. https://doi.org/10.1103/physrevd.107.015007

The phenomenology of axions and axionlike particles strongly depends on their couplings to Standard Model particles. The focus of this paper is the phenomenology of the unique dimension-six operator respecting the shift symmetry: the axion-Higgs port... Read More about Axion-Higgs portal.

Consistent Theory of Kinetic Mixing and the Higgs Low-Energy Theorem (2022)
Journal Article
Bauer, M., & Foldenauer, P. (2022). Consistent Theory of Kinetic Mixing and the Higgs Low-Energy Theorem. Physical Review Letters, 129(17), Article 171801. https://doi.org/10.1103/physrevlett.129.171801

Extensions of the standard model of particle physics with new Abelian gauge groups allow for kinetic mixing between the new gauge bosons and the hypercharge gauge boson, resulting in mixing with the photon. In many models, the mixing with the hyperch... Read More about Consistent Theory of Kinetic Mixing and the Higgs Low-Energy Theorem.

Searches for long-lived particles at the future FCC-ee (2022)
Journal Article
Verhaaren, C., Alimena, J., Bauer, M., Azzi, P., Ruiz, R., Neubert, M., Mikulenko, O., Ovchynnikov, M., Drewes, M., Klaric, J., Blondel, A., Rizzi, C., Sfyrla, A., Sharma, T., Kulkarni, S., Thamm, A., Suarez, R. G., & Rygaard, L. (2022). Searches for long-lived particles at the future FCC-ee. Frontiers in Physics, 10, 1-25. https://doi.org/10.3389/fphy.2022.967881

The electron-positron stage of the Future Circular Collider, FCC-ee, is a frontier factory for Higgs, top, electroweak, and flavour physics. It is designed to operate in a 100 km circular tunnel built at CERN, and will serve as the first step towards... Read More about Searches for long-lived particles at the future FCC-ee.

Flavor probes of axion-like particles (2022)
Journal Article
Bauer, M., Neubert, M., Renner, S., Schnubel, M., & Thamm, A. (2022). Flavor probes of axion-like particles. Journal of High Energy Physics, 2022(9), Article 56. https://doi.org/10.1007/jhep09%282022%29056

Axions and axion-like particles (ALPs) are well-motivated low-energy relics of high-energy extensions of the Standard Model (SM). We investigate the phenomenology of an ALP with flavor-changing couplings, and present a comprehensive analysis of quark... Read More about Flavor probes of axion-like particles.

Relic neutrinos at accelerator experiments (2021)
Journal Article
Bauer, M., & Shergold, J. D. (2021). Relic neutrinos at accelerator experiments. Physical Review D, 104(8), https://doi.org/10.1103/physrevd.104.083039

We present a new technique for observing low energy neutrinos with the aim of detecting the cosmic neutrino background using ion storage rings. Utilizing high energy targets exploits the quadratic increase in the neutrino capture cross section with b... Read More about Relic neutrinos at accelerator experiments.

Consistent Treatment of Axions in the Weak Chiral Lagrangian (2021)
Journal Article
Bauer, M., Neubert, M., Renner, S., Schnubel, M., & Thamm, A. (2021). Consistent Treatment of Axions in the Weak Chiral Lagrangian. Physical Review Letters, 127(8), https://doi.org/10.1103/physrevlett.127.081803

We present a consistent implementation of weak decays involving an axion or axionlike particle in the context of an effective chiral Lagrangian. We argue that previous treatments of such processes have used an incorrect representation of the flavor-c... Read More about Consistent Treatment of Axions in the Weak Chiral Lagrangian.