ISSN - 00213640, EISSN - 10906487, JETP Letters, 2015, vol. 102, 5, p. 266-270
On the search for the η → e + e − decay at the VEPP-2000 e + e − collider
© 2015, Pleiades Publishing, Inc. The sensitivity of the VEPP-2000 e+e− collider in the search for the rare decay η → e+e− has been studied. The inverse reaction e+e− → η is proposed for this search. We have analyzed a data sample with an integrated luminosity of 108 nb−1 collected with the SND detector in the center-of-mass energy range 520–580 MeV and found no background events for the reaction e+e− → η in the decay mode η → π0π0π0. In the absence of background, a sensitivity to B(η → e+e−) of 10−6 can be reached during two weeks of VEPP-2000 operation. Such a sensitivity is higher than the current upper limit on B(η → e+e−) by a factor of 2.3.