570 citations · 3.4k across the 54 of their papers we have counts for
51 papers · 1 filter
Four-loop QCD mixing of current-current operators
Joachim Brod, Emmanuel Stamou, Tom Steudtner
We calculate the anomalous dimension of the current-current operators of the weak effective Lagrangian at next-to-next-to-next-to-leading order (NNNLO) in QCD. This cons…
Hadronic CP Violation in the 2HDM
Wolfgang Altmannshofer, Joachim Brod, Patipan Uttayarat +1
We present the first complete two-loop calculation of the electric and chromo-electric dipole moments of the light quarks and the gluon, as well as contributions to CP-violating le…
Kaon Physics: A Cornerstone for Future Discoveries
Jason Aebischer, Atakan Tugberk Akmete, Riccardo Aliberti +153
The kaon physics programme, long heralded as a cutting-edge frontier by the European Strategy for Particle Physics, continues to stand at the intersection of discovery and innovati…
Electron EDM and in the 2HDM
Wolfgang Altmannshofer, Benoît Assi, Joachim Brod +4
We present the first complete two-loop calculation of the electric dipole moment of the electron, as well as the rates of the lepton-flavor violating decays and $τ\to…
MaRTIn -- Manual for the "Massive Recursive Tensor Integration"
Joachim Brod, Lorenz Hüdepohl, Emmanuel Stamou +1
We present MaRTIn, an extendable all-in-one package for calculating amplitudes up to two loops in an expansion in external momenta or using the method of infrared rearrangement. Re…
A Precise Electron EDM Constraint on CP-odd Heavy-Quark Yukawas
Joachim Brod, Zachary Polonsky, Emmanuel Stamou
CP-odd Higgs couplings to bottom and charm quarks arise in many extensions of the standard model and are of potential interest for electroweak baryogenesis. These couplings induce…
Snowmass Theory Frontier: Effective Field Theory
Matthew Baumgart, Fady Bishara, Tomas Brauner +34
We summarize recent progress in the development, application, and understanding of effective field theories and highlight promising directions for future research. This Report is p…
Impact of indirect CP violation on Br
Joachim Brod, Emmanuel Stamou
The decay , with the final muon pair in an angular-momentum zero state, is a sensitive probe of short-distance physics. It has recently been shown how to…
Electroweak Corrections to the Charm-Top-Quark Contribution to
Joachim Brod, Sandra Kvedaraite, Zachary Polonsky +1
We calculate the leading-logarithmic and next-to-leading-logarithmic electroweak corrections to the charm-top-quark contribution to the effective Lagrangian, relevant fo…
Snowmass White Paper: Effective Field Theories for Dark Matter Phenomenology
Matthew Baumgart, Fady Bishara, Joachim Brod +10
The quest to discover the nature of dark matter continues to drive many of the experimental and observational frontiers in particle physics, astronomy, and cosmology. While there a…
Global Constraints on Yukawa Operators in the Standard Model Effective Theory
Joachim Brod, Jonathan M. Cornell, Dimitrios Skodras +1
CP-violating contributions to Higgs--fermion couplings are absent in the standard model of particle physics (SM), but are motivated by models of electroweak baryogenesis. Here, we…
New Physics Searches at Kaon and Hyperon Factories
Evgueni Goudzovski, Diego Redigolo, Kohsaku Tobioka +61
Rare meson decays are among the most sensitive probes of both heavy and light new physics. Among them, new physics searches using kaons benefit from their small total decay widths…
Dark Matter Effective Theory
Joachim Brod
Les Houches 2021 lectures on dark matter effective field theory (short course). The aim of these two lectures is to calculate the DM-nucleus cross section for a simple example, and…
Two-loop Electroweak Corrections to the Top-Quark Contribution to
Joachim Brod, Sandra Kvedaraitė, Zachary Polonsky
The parameter measures violation in the neutral kaon system. It is a sensitive probe of new physics and plays a prominent role in the global fit of the Cabibbo-Kobabyash…
Thermal WIMPs and the Scale of New Physics: Global Fits of Dirac Dark Matter Effective Field Theories
The GAMBIT Collaboration, Peter Athron, Neal Avis Kozar +24
We assess the status of a wide class of WIMP dark matter (DM) models in light of the latest experimental results using the global fitting framework . We perform a…
Updated Standard Model Prediction for and
Joachim Brod, Martin Gorbahn, Emmanuel Stamou
The rare decay modes and the parameter that measures CP violation in Kaon mixing are sensitive probes of physics beyond the standard model. In this article we…
Generic One-Loop Matching Conditions for Rare Meson Decays
Fady Bishara, Joachim Brod, Martin Gorbahn +1
Leptonic and semileptonic meson decays that proceed via flavour-changing neutral currents provide excellent probes of physics of the standard model and beyond. We present explicit…
Radiative three-body D-meson decays in and beyond the standard model
Nico Adolph, Joachim Brod, Gudrun Hiller
We study radiative charm decays , in QCD factorization at leading order and within heavy hadron chiral perturbation theory. Branching ratios includin…
Two-loop Beta Function for Complex Scalar Electroweak Multiplets
Joachim Brod, Zachary Polonsky
We present the general form of the renormalizable four-point interactions of a complex scalar field furnishing an irreducible representation of SU(2), and derive a set of algebraic…
Standard-model prediction of with manifest CKM unitarity
Joachim Brod, Martin Gorbahn, Emmanuel Stamou
The parameter describes CP violation in the neutral kaon system and is one of the most sensitive probes of new physics. The large uncertainties related to the charm-quark con…
The Z Penguin in Generic Extensions of the Standard Model
Joachim Brod, Martin Gorbahn
Precision flavour observables play an important role in the interpretation of results at the LHC in terms of models of new physics. We present the result for the one-loop Z penguin…
Electric dipole moment constraints on CP-violating light-quark Yukawas
Joachim Brod, Dimitrios Skodras
Nonstandard CP violation in the Higgs sector can play an essential role in electroweak baryogenesis. We calculate the full two-loop matching conditions of the standard model, with…
Electric dipole moment constraints on CP-violating heavy-quark Yukawas at next-to-leading order
Joachim Brod, Emmanuel Stamou
Electric dipole moments are sensitive probes of new phases in the Higgs Yukawa couplings. We calculate the complete two-loop QCD anomalous dimension matrix for the mixing of CP-odd…
Renormalization Group Effects in Dark Matter Interactions
Fady Bishara, Joachim Brod, Benjamin Grinstein +1
We present a renormalization-group (RG) analysis of dark matter interactions with the standard model, where dark matter is allowed to be a component of an electroweak multiplet, an…