Details

Autor(en) / Beteiligte

• Dev, P. S. Bhupal
• Rodejohann, Werner
• Xu, Xun-Jie
• Zhang, Yongchao

Titel

Searching for Z′ bosons at the P2 experiment

Ist Teil von

• The journal of high energy physics, 2021-06, Vol.2021 (6), p.1-36, Article 39

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2021

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• A bstract The P2 experiment aims at high-precision measurements of the parity-violating asymmetry in elastic electron-proton and electron- 12 C scatterings with longitudinally polarized electrons. We discuss here the sensitivity of P2 to new physics mediated by an additional neutral gauge boson Z ′ of a new U(1)′ gauge symmetry. If the charge assignment of the U(1)′ is chiral, i.e., left- and right-handed fermions have different charges under U(1)′, additional parity-violation is induced directly. On the other hand, if the U(1)′ has a non-chiral charge assignment, additional parity-violation can be induced via mass or kinetic Z - Z ′ mixing. By comparing the P2 sensitivity to existing constraints, we show that in both cases P2 has discovery potential over a wide range of Z ′ mass. In particular, for chiral models, the P2 experiment can probe gauge couplings at the order of 10 − 5 when the Z ′ boson is light, and heavy Z ′ bosons up to 79 (90) TeV in the proton ( 12 C) mode. For non-chiral models with mass mixing, the P2 experiment is sensitive to mass mixing angles smaller than roughly 10 − 4 , depending on model details and gauge coupling magnitude.