Bartosz Fornal

Particle physics models for the 17 MeV anomaly in beryllium nuclear decays

The

Phenomenology of scalar leptoquarks

6.8\ensuremath{\sigma}

Baryon Number and Lepton Universality Violation in Leptoquark and Diquark Models

anomaly in excited

Simplified models with baryon number violation but no proton decay

^{8}\mathrm{Be}

Baryon Number as the Fourth Color

nuclear decays via internal pair creation is fit well by a new particle interpretation. In a previous analysis, we showed that a 17 MeV protophobic gauge boson provides a particle physics explanation of the anomaly consistent with all existing constraints. Here we begin with a review of the physics of internal pair creation in

B and L at the supersymmetry scale, dark matter, and R-parity violation

^{8}\mathrm{Be}

Asymmetric dark matter and baryogenesis from SU(2)(l)

decays and the characteristics of the observed anomaly. To develop its particle interpretation, we provide an effective operator analysis for excited

Is there a sign of new physics in beryllium transitions

^{8}\mathrm{Be}

Electroweak gauge boson parton distribution functions

decays to particles with a variety of spins and parities and show that these considerations exclude simple models with scalar particles. We discuss the required couplings for a gauge boson to give the observed signal, highlighting the significant dependence on the precise mass of the boson and isospin mixing and breaking effects. We present anomaly-free extensions of the Standard Model that contain protophobic gauge bosons with the desired couplings to explain the

SU(5) Unification without Proton Decay

^{8}\mathrm{Be}