Abstract: After a quick introduction about my self I will discuss neutral gauge boson (Z’) extensions of the SM in the context of neutral current B decays and the Electroweak Precision Observables. Z’ bosons are naturally predicted within several extensions of the SM and the current tensions between theoretical predictions and experimental observations, in different sectors of physics, strongly motivate their searches at or below the TeV scale. In the absence of direct observations and a prominent UV model, simplified models (i.e. models whose UV completion is not specified) provide the best framework to investigate the indirect hints for this new bosons. In this talk, I will start discussing heavy Z’ solutions to the tensions in neutral current B decays and the electroweak fit, and I will then turn to discuss whether light Z’ solutions can be excluded. Finally, I will talk about an on-going project where I am investigating the constraints on a general muon-dark sector portal mediated by a Z’ (as well as other possible mediators) from supernova cooling.

https://lbnl.zoom.us/j/98941053722?pwd=TVRFMURlSHlJSHl1OE0xelh1a0FLdz09