Searching for an Invisible A' Vector Boson with DarkLight
Name
Thaler_Searching for.pdf
Size
1.79 MB
Format
Adobe PDF
Checksum (MD5)
7cb47bb87c2eafb15eb46b738e5c9e53
Author(s)
Kahn, Yonatan Frederick
Thaler, Jesse
Date Issued
December 2012
Journal
Physical Review D
Publisher
American Physical Society
Citation
Kahn, Yonatan, and Jesse Thaler. “Searching for an Invisible A^{′} Vector Boson with DarkLight.” Physical Review D 86.11 (2012). © 2012 American Physical Society
Version
Final published version
Abstract
High-luminosity experiments are able to search for new physics at low energies, which could have evaded detection thus far due to very weak couplings to the Standard Model. The DarkLight experiment at Jefferson Lab is designed to search for a new U(1) vector boson A′ in the mass range 10–100 MeV through its decay A′→e[superscript +]e[superscript -]. In this paper, we demonstrate that DarkLight is also sensitive to an A′ decaying to invisible final states. We analyze the DarkLight reach for invisible A′ bosons assuming a nominal two month running time, including the possibility of augmenting the DarkLight design to include photon detection. We also propose two new analysis techniques that might prove useful for other high-luminosity searches: a cut on missing energy to improve the invariant mass resolution, and a cut on the sign of the missing invariant mass-squared to mitigate pileup. We compare the DarkLight reach to existing experimental proposals, including a complementary search using the VEPP-3 positron beam.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.86.115012
