Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1850748 | Physics Letters B | 2015 | 5 Pages |
Abstract
The existence of a new force beyond the Standard Model is compelling because it could explain several striking astrophysical observations which fail standard interpretations. We searched for the light vector mediator of this dark force, the U boson, with the KLOE detector at the DAΦNE e+eâ collider. Using an integrated luminosity of 1.54 fbâ1, we studied the process e+eââUγ, with Uâe+eâ, using radiative return to search for a resonant peak in the dielectron invariant-mass distribution. We did not find evidence for a signal, and set a 90% CL upper limit on the mixing strength between the Standard Model photon and the dark photon, ε2, at 10â6-10â4 in the 5-520 MeV/c2 mass range.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
A. Anastasi, D. Babusci, G. Bencivenni, M. Berlowski, C. Bloise, F. Bossi, P. Branchini, A. Budano, L. Caldeira BalkestÃ¥hl, B. Cao, F. Ceradini, P. Ciambrone, F. Curciarello, E. CzerwiÅski, G. D'Agostini, E. Danè, V. De Leo, E. De Lucia, M. Wolke,