96 citations · 382 across the 16 of their papers we have counts for
17 papers
Probing Ultralight Dark Matter at the Mega-Planck Scale with the Thorium Nuclear Clock
Jason Arakawa, Jack F. Doyle, Elina Fuchs +10
Ultralight dark matter is expected to induce oscillations of nuclear parameters. These oscillations are characterized by extremely weak couplings or high suppression scales, with t…
Atomic Observables Induced by Cosmic Fields
Sebastian Lahs, Daniel Comparat, Fiona Kirk +1
The existence of cosmic fields made from yet unknown light bosons is predicted in many extensions to the Standard Model. They are especially of interest as possible constituents of…
Apparent Lorentz violation from disformally coupled ultralight dark matter
Guillem Domènech, Apostolos Tsabodimos, Apostolos Tsampodimos +3
We study the impact of general disformal metric transformations on fermions, which shift the gravitational metric by an additional rank-2 tensor. This tensor can in principle be co…
Towards a Global Search for New Physics with Isotope Shifts
Elina Fuchs, Fiona Kirk, Agnese Mariotti +2
Isotope shifts have emerged as a sensitive probe of new bosons that couple to electrons and neutrons, and of nuclear structure. The recent Hz- or even sub-Hz-level isotope shift me…
Searching for dark matter with the Th-229 nuclear lineshape from laser spectroscopy
Elina Fuchs, Fiona Kirk, Eric Madge +5
The recent laser excitation of the low-lying Th-229 isomer transition is starting a revolution in ultralight dark matter searches. The enhanced sensitivity of this transition to th…
Probing new bosons and nuclear structure with ytterbium isotope shifts
Menno Door, Chih-Han Yeh, Matthias Heinz +24
In this Letter, we present mass-ratio measurements on highly charged Yb ions with a precision of and isotope-shift measurements on Yb on the …
Charged Higgs-Boson Decays into Quarks
Jamie Chang, Fiona Kirk, Margarete Mühlleitner +1
We consider the full genuine next-to-leading order SUSY-QCD corrections to the charged Higgs decays into quarks supplemented by the NNLO corrections to the effective top and bottom…
Impact of Lorentz violation on anomalous magnetic moments of charged leptons
Andreas Crivellin, Fiona Kirk, Marco Schreck
We address the question whether a violation of Lorentz symmetry can explain the tension between the measurement and the Standard-Model prediction of the anomalous magnetic moment o…
Comprehensive Analysis of Charged Lepton Flavour Violation in the Symmetry Protected Type-I Seesaw
Andreas Crivellin, Fiona Kirk, Claudio Andrea Manzari
The type-I seesaw model is probably the most straightforward and best studied extension of the Standard Model that can account for the tiny active neutrino masses determined from n…
A viable model with violation
Marco Ardu, Fiona Kirk
We extend the Standard Model gauge group by and introduce two scalars, a doublet and a singlet, that are charged under this new group and have lepton flavour viola…
Leptophilic New Physics and the Cabibbo Angle Anomaly
Fiona Kirk
The Cabibbo Angle Anomaly, an apparent deficit in first-row CKM unitarity, can be addressed by leptophilic Standard Model extensions that generate new contributions to the Fermi co…
Explaining the Cabibbo Angle Anomaly and Lepton Flavour Universality Violation in Tau Decays With a Singly-Charged Scalar Singlet
Fiona Kirk
The singly charged singlet scalar, with its necessarily flavour violating couplings to leptons, lends itself particularly well for an explanation of the Cabibbo Angle Ano…
Global Analysis of Leptophilic Z' Bosons
Andrzej J. Buras, Andreas Crivellin, Fiona Kirk +2
New neutral heavy gauge bosons () are predicted within many extensions of the Standard Model. While in case they couple to quarks the LHC bounds are very stringent, lepto…
Searching for Lepton Flavour (Universality) Violation and Collider Signals from a Singly-Charged Scalar Singlet
Andreas Crivellin, Fiona Kirk, Claudio Andrea Manzari +1
In recent years, evidence for lepton flavour universality violation beyond the Standard Model has been accumulated. In this context, a singly charged singlet scalar ($ϕ^\…
Implications of gauge invariance for constraints on Lorentz violation
Andreas Crivellin, Fiona Kirk, Marco Schreck
Lorentz invariance is one of the basic ingredients of quantum field theories and violations of it are stringently constrained experimentally. Therefore, the possibility of Lorentz…
Global Electroweak Fit and Vector-Like Leptons in Light of the Cabibbo Angle Anomaly
Andreas Crivellin, Fiona Kirk, Claudio Andrea Manzari +1
The "Cabibbo Angle Anomaly" (CAA) originates from the disagreement between the CKM elements and extracted from superallowed beta and kaon decays, respectively, on…
models with less-minimal flavour violation
Lorenzo Calibbi, Andreas Crivellin, Fiona Kirk +2
We study the phenomenology of simplified models with a global flavour symmetry in the quark sector, broken solely by the Standard Model Yukawa couplings. This f…