Limit on the production of a low-mass vector boson in ${\mathrm{e}}^{+}{\mathrm{e}}^{-}\to \mathrm{U}\gamma$, $\mathrm{U}\to {\mathrm{e}}^{+}{\mathrm{e}}^{-}$ with the KLOE experiment

A. Anastasi, D. Babusci, G. Bencivenni +61

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 se…