Nicole Bell

Solar gamma ray constraints on dark matter annihilation to secluded mediators

Nicole F Bell, James B Dent, Isaac W Sanderson

Journal article  |  2021  |  PHYSICAL REVIEW D

We consider the indirect detection of dark matter that is captured in the Sun and subsequently annihilates to long-lived dark medi..

A real triplet-singlet extended Standard Model: dark matter and collider phenomenology

Nicole F Bell, Matthew J Dolan, Leon S Friedrich, Michael J Ramsey-Musolf, Raymond R Volkas

Journal article  |  2021  |  JOURNAL OF HIGH ENERGY PHYSICS

We examine the collider and dark matter phenomenology of the Standard Model extended by a hypercharge-zero SU(2) triplet scalar an..

Improved treatment of dark matter capture in neutron stars II: leptonic targets

Nicole F Bell, Giorgio Busoni, Sandra Robles, Michael Virgato

Journal article  |  2021  |  Journal of Cosmology and Astroparticle Physics

Neutron stars harbour matter under extreme conditions, providing a unique testing ground for fundamental interactions. We recently..

Explaining the XENON1T Excess with Luminous Dark Matter

Nicole F Bell, James B Dent, Bhaskar Dutta, Sumit Ghosh, Jason Kumar, Jayden L Newstead

Journal article  |  2020  |  PHYSICAL REVIEW LETTERS

We show that the excess in electron recoil events seen by the XENON1T experiment can be explained by a relatively low-mass luminou..

Improved treatment of dark matter capture in neutron stars

Nicole F Bell, Giorgio Busoni, Sandra Robles, Michael Virgato

Journal article  |  2020  |  Journal of Cosmology and Astroparticle Physics

Neutron stars provide a cosmic laboratory to study the nature of dark matter particles and their interactions. Dark matter can be ..

Searching for Sub-GeV dark matter in the galactic centre using Hyper-Kamiokande

Nicole F Bell, Matthew J Dolan, Sandra Robles

Journal article  |  2020  |  JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS

Indirect detection of dark matter via its annihilation products is a key technique in the search for dark matter in the form of we..

Two-step electroweak symmetry-breaking: theory meets experiment

Nicole F Bell, Matthew J Dolan, Leon S Friedrich, Michael J Ramsey-Musolf, Raymond R Volkas

Journal article  |  2020  |  The Journal of High Energy Physics

We study the phenomenology of a hypercharge-zero SU (2) triplet scalar whose existence is motivated by two-step electroweak symmet..

Migdal effect and photon bremsstrahlung in effective field theories of dark matter direct detection and coherent elastic neutrino-nucleus scattering

Nicole F Bell, James B Dent, Jayden L Newstead, Subir Sabharwal, Thomas J Weiler

Journal article  |  2020  |  PHYSICAL REVIEW D

Dark matter direct detection experiments have limited sensitivity to light dark matter (below a few GeV), due to the challenges of..

LHC Dark Matter Working Group: Next-generation spin-0 dark matter models

Tomohiro Abe, Yoav Afik, Andreas Albert, Christopher R Anelli, Liron Barak, Martin Bauer, J Katharina Behr, Nicole F Bell, Antonio Boveia, Oleg Brandt, Giorgio Busoni, Linda M Carpenter, Yu-Heng Chen, Caterina Doglioni, Alison Elliot, Motoko Fujiwara, Marie-Helene Genest, Raffaele Gerosa, Stefania Gori, Johanna Gramling, et al.

Journal article  |  2020  |  PHYSICS OF THE DARK UNIVERSE

Dark matter (DM) simplified models are by now commonly used by the ATLAS and CMS Collaborations to interpret searches for missing ..

Electroweak baryogenesis with vector-like leptons and scalar singlets

Nicole F Bell, Matthew J Dolan, Leon S Friedrich, Michael J Ramsey-Musolf, Raymond R Volkas

Journal article  |  2019  |  JOURNAL OF HIGH ENERGY PHYSICS

We investigate the viability of electroweak baryogenesis in a model with a first order electroweak phase transition induced by the..