Tim Kretz

activity

20242026

collaborators

5 papers

hep-ph2026

QCD corrections to charged-current decays with Heavy Sterile Neutrinos in initial or final state and their impact on $I ¨ $ decays

Tim Kretz, Ulrich Nierste

Searches for a Heavy Sterile Neutrino $N$ profit from precise predictions of inclusive decay rates, entering predictions for branching fractions and lifetime. Once decay channels i…

hep-ph2026

$b \to c$ semileptonic sum rule: exploring a sterile neutrino loophole

Motoi Endo, Syuhei Iguro, Tim Kretz +1

We investigate the $b \to c$ semileptonic sum rule in the presence of a massive sterile neutrino. Recent measurements of charged-current semitauonic $B$ -meson decays exhibit a $\sim…

hep-ph2026

$b \to c$ semileptonic sum rule: Extension to angular observables

Motoi Endo, Syuhei Iguro, Tim Kretz +2

Lepton flavor universality is a key prediction of the Standard Model of particle physics and any violation of it immediately indicates the existence of new physics. Given the recen…

hep-ph2025

Heavy sterile neutrinos in $B$ decays and new QCD corrections to their semi-hadronic decay rates

Tim Kretz

In modern experiments on flavour physics it is possible to search for the decays of $B$ or $D$ mesons or $I ¨ $ leptons into final states with heavy neutrinos $N$ (a.k.a. heavy neutr…

hep-ph2024

Model independent bounds on heavy sterile neutrinos from the angular distribution of $B \to D^{*} ℓ I^½$ decays

Florian U. Bernlochner, Marco Fedele, Tim Kretz +2

In this paper we study the bounds that can be inferred on New Physics couplings to heavy sterile neutrinos $N$ from the recent measurements performed by the Belle collaboration of…

QCD corrections to charged-current decays with Heavy Sterile Neutrinos in initial or final state and their impact on I¨ decays

b→c semileptonic sum rule: exploring a sterile neutrino loophole

b→c semileptonic sum rule: Extension to angular observables

Heavy sterile neutrinos in B decays and new QCD corrections to their semi-hadronic decay rates

Model independent bounds on heavy sterile neutrinos from the angular distribution of B→D∗ℓI^½ decays

QCD corrections to charged-current decays with Heavy Sterile Neutrinos in initial or final state and their impact on $I ¨ $ decays

$b \to c$ semileptonic sum rule: exploring a sterile neutrino loophole

$b \to c$ semileptonic sum rule: Extension to angular observables

Heavy sterile neutrinos in $B$ decays and new QCD corrections to their semi-hadronic decay rates

Model independent bounds on heavy sterile neutrinos from the angular distribution of $B \to D^{*} ℓ I^½$ decays