8 papers
A note on momentum subtraction schemes for quark bilinears and semileptonic operators
P. A. Boyle, M. Bruno, M. Gorbahn +4
In this work we examine a family of regularization invariant (RI) symmetric momentum (SMOM) schemes for semi-leptonic operators. By working with chirally symmetric and massless QCD…
Renormalisation and invariants for two U(1)s
Sacha Davidson, Martin Gorbahn
We revisit the renormalisation of models with two U(1) gauge symmetries, in a formulation with non-canonical gauge kinetic terms which is covariant under field reparametrisations a…
Semileptonic weak Hamiltonian to in momentum-space subtraction schemes
M. Gorbahn, S. Jäger, F. Moretti +1
The CKM unitarity precision test of the Standard Model requires a systematic treatment of electromagnetic and strong corrections for semi-leptonic decays. Electromagnetic correctio…
Linking Leptogenesis and Asymmetric Dark Matter: A Testable Framework for Neutrino Mass and the Matter-Antimatter Asymmetry
Henry G. F. McKenna, Juri Smirnov, Martin Gorbahn
We investigate a minimal extension of the Leptogenesis framework that simultaneously explains the observed baryon asymmetry and dark matter (DM) abundance through the decay of a he…
Beyond Leading Logarithms in : The Semileptonic Weak Hamiltonian at
Francesco Moretti, Martin Gorbahn, Sebastian Jaeger
We present the first next-to-leading-logarithmic QCD analysis of the electromagnetic corrections to the semileptonic weak Hamiltonian, including the mixed …
RI-(S)MOM to conversion for at two-loop order
Martin Gorbahn, Sebastian Jäger, Sandra KvedaraitÄ
The Kaon bag parameter plays a critical role in constraining the parameters of the CKM matrix and in probing physics beyond the Standard Model. In this work, we imp…