Muon and electron g-2 and proton and cesium weak charges implications on dark Zd models

Cadeddu, M. and Cargioli, N. and Dordei, F. and Giunti, C. and Picciau, E. (2022) Muon and electron g-2 and proton and cesium weak charges implications on dark Zd models. Il nuovo cimento C, 45 (1). pp. 1-5. ISSN 1826-9885

Text ncc12341.pdf - Published Version Download (184kB)

Abstract

The recent determination of the anomalous muon magnetic moment performed at Fermilab motivated us to look for an interpretation of the result in the framework of a beyond the standard model vector Zd mediator. In this work, we derive the constraints on such model obtained from the muon and electron magnetic moment determinations and the measurements of the proton and cesium weak charge, QW . We first revisit the determination of the cesium QW from atomic parity violation experiment by exploiting recent results from other electroweak probes. From a combined fit of all the mentioned experimental results, we obtain rather precise limits on the mass and the kinetic mixing parameter of the Zd boson, namely mZd = 47+61 −16 MeV and ε = 2.3+1.1 −0.4×10−3, when marginalizing over the Z −Zd mass mixing parameter δ

Item Type:	Article
Subjects:	500 Scienze naturali e Matematica > 530 Fisica
Depositing User:	Marina Spanti
Date Deposited:	19 Jan 2022 16:42
Last Modified:	19 Jan 2022 16:42
URI:	http://eprints.bice.rm.cnr.it/id/eprint/21558

Actions (login required)

View Item