Conveners
Fundamental Symmetries: Fundamental Symmetries
- John Bulava (CP3-Origins, University of Southern Denmark)
The Heavy Photon Search (HPS) experiment at Jefferson Lab is searching for a new $U(1)$ vector boson ("heavy photon", "dark photon" or $A'$) in the mass range of 20-500 MeV/c$^2$. An $A'$ in this mass region is natural in hidden sector models of light, thermal dark matter. The $A'$ couples to the ordinary photon through kinetic mixing, which induces its coupling to electric charge. Since heavy...
In this talk, I will discuss two topics:
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The Schwinger sum rule as a new data-driven dispersive approach for the evaluation of hadronic corrections to the muon g-2.
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Proton-polarizability effects in muonic hydrogen using baryon chiral perturbation theory.
An unbound neutron decays via the weak interaction into a proton, electron, and antineutrino with a lifetime $\tau_n$ of approximately 15 minutes. Within the Standard Model of particle physics, $\tau_n$ is precisely related to two other parameters, the nucleon axial form factor $g_A$ and the CKM matrix element $V_{ud}$. Thus, measurements of two of these parameters determines the third, or...
Observed baryon asymmetry of the universe (BAU) cannot be explained by the known sources of charge-parity (CP)-violation in the Standard Model (SM). A non-zero permanent electric-dipole-moment (EDM) of fundamental particles, nuclei or atoms, violates CP. Measuring an EDM definitively allows us to gain a handle on additional sources of CP-violation required to explain the observed BAU. EDM of...
