Increased sensitivity to possible muonium to antimuonium conversion

/ Authors

V. Meyer, A. Grossmann, K. Jungmann, J. Merkel, G. Putlitz, I. Reinhard, K. Trager, P. Schmidt, L. Willmann, R. Engfer

and 22 more authors

H. Wirtz, R. Abela, W. Bertl, D. Renker, H. Walter, V. Karpuchin, I. Kisel, A. Korenchenko, S. Korenchenko, N. Kravchuk, N. Kuchinsky, A. Moiseenko, J. Bagaturia, D. Mzavia, T. Sakhelashvili, V. Hughes, U. Heidelberg, U. Zurich, Psi, J. Dubna, U. Tbilisi, Yale

/ Abstract

A new experimental search for muonium-antimuonium conversion was conducted at the Paul Scherrer Institute, Villigen, Switzerland. The preliminary analysis yielded one event fulfilling all required criteria at an expected background of 1.7(2) events due to accidental coincidences. An upper limit for the conversion probability in 0.1 T magnetic field is extracted as 8⋅10−11 (90% CL).

Journal: Intersections between particle and nuclear physics

DOI: 10.1063/1.54250