43 citations · 112 across the 10 of their papers we have counts for
11 papers · 1 filter
Feasibility Study of Lepton Number Violation in Rare and Meson Decays
Motoi Endo, Kåre Fridell, Sho Iwamoto +2
We study lepton-number-violating interactions at dimension seven in the Standard Model effective field theory that contribute to the meson decays and . Such…
Radiative neutrino masses from dim-7 SMEFT: a simplified multi-scale approach
Kåre Fridell, Lukáš Gráf, Julia Harz +1
Lepton-number-violating interactions occur in the Standard Model Effective Field Theory (SMEFT) at odd dimensions starting from the dimension-5 Weinberg operator. Although the oper…
Leptogenesis and neutrino mass with scalar leptoquarks
Kåre Fridell
Leptoquarks are known to generate a wide range of potentially observable phenomena, and have been searched for in different experiments. We show that the observed baryon asymmetry…
Heavy photophobic ALP at the LHC
Masashi Aiko, Motoi Endo, Kåre Fridell
We study the photophobic ALP model in high-mass regions under LHC Run-II. Since the ALP is predominantly coupled with electroweak gauge bosons such as , , and , and les…
Non-Canonical Nucleon Decays as Window into Light New Physics
Kåre Fridell, Chandan Hati, Volodymyr Takhistov
Nucleon decays are generic predictions of motivated theories, including those based on the unification of forces and supersymmetry. We demonstrate that non-canonical nucleon decays…
Decoding the excess at Belle II: kinematics, operators, and masses
Kåre Fridell, Mitrajyoti Ghosh, Takemichi Okui +1
An excess in the branching fraction for recently measured at Belle II may be a hint of new physics. We perform thorough likelihood analyses for different new physi…
Probing Lepton Number Violation: A Comprehensive Survey of Dimension-7 SMEFT
Kåre Fridell, Lukáš Gráf, Julia Harz +1
Observation of lepton number violation would represent a groundbreaking discovery with profound consequences for fundamental physics and as such, it has motivated an extensive expe…
Lepton flavor physics at colliders
Kåre Fridell, Ryuichiro Kitano, Ryoto Takai
We discuss sensitivities to lepton flavor violating (and conserving) interactions at future muon colliders, especially at colliders. Compared with the searches for rare de…
Probing baryogenesis with neutron-antineutron oscillations
Kåre Fridell, Julia Harz, Chandan Hati
In the near future, the Deep Underground Neutrino Experiment and the European Spallation Source aim to reach unprecedented sensitivity in the search for neutron-antineutron ($n\tex…
Non-relativistic Effective Interactions of Spin 1 Dark Matter
Riccardo Catena, Kåre Fridell, Martin B. Krauss
We investigate the non-relativistic reduction of simplified models for spin 1 dark matter (DM) with the aim of identifying features in the phenomenology of DM-quark interactions wh…
Direct detection of fermionic and vector dark matter with polarised targets
Riccardo Catena, Kåre Fridell, Vanessa Zema
We study the scattering of Milky Way dark matter (DM) particles by spin-polarised target nuclei within a set of simplified models for fermionic and vector DM where DM interacts wit…