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Measurement of the e+e- › ?+?- cross section between 600 and 900 MeV using initial state radiation
We extract the e+e-›?+?- cross section in the energy range between 600 and 900 MeV, exploiting the method of initial state radiation. A data set with an integrated luminosity of 2.93 fb-1 taken at a center-of-mass energy ...
Dark photon search in the mass range between 1.5 and 3.4 GeV/c
(Elsevier Science, 2017)
Using a data set of 2.93 fb taken at a center-of-mass energy root s = 3.773 GeV with the BESIII detector at the BEPCII collider, we perform a search for an extra U(1) gauge boson, also denoted as a dark photon. We examine ...