Theoretical framework to analyze searches for hidden light gauge bosons in electron scattering fixed target experiments

T. Beranek, H. Merkel, and M. Vanderhaeghen
Phys. Rev. D 88, 015032 – Published 29 July 2013

Abstract

Motivated by anomalies in cosmic ray observations and by attempts to solve questions of the Standard Model of particle physics like the (g2)μ discrepancy, U(1) extensions of the Standard Model have been proposed in recent years. Such U(1) extensions allow for the interaction of dark matter by exchange of a photonlike massive force carrier γ not included in the Standard Model. In order to search for γ bosons, various experimental programs have been started. One approach is the dedicated search at fixed-target experiments at modest energies as performed at microtron (MAMI) or at the Jefferson Lab. In these experiments the process e(A,Z)e(A,Z)l+l is investigated, and a search for a very narrow resonance in the invariant mass distribution of the l+l pair is performed. In this work we analyze this process in terms of signal and background in order to describe existing data obtained by the A1 experiment at MAMI with the aim to give accurate predictions for exclusion limits in the γ parameter space. We present a detailed theoretical analysis of the cross sections entering in the description of such processes.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
5 More
  • Received 20 March 2013

DOI:https://doi.org/10.1103/PhysRevD.88.015032

© 2013 American Physical Society

Authors & Affiliations

T. Beranek, H. Merkel, and M. Vanderhaeghen

  • PRISMA Cluster of Excellence, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany and Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 88, Iss. 1 — 1 July 2013

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×