Improved Upper Limit on Muonium to Antimuonium Conversion
نویسندگان
چکیده
منابع مشابه
Magnetic Field Dependence of Muonium-antimuonium Conversion
We study the magnetic field dependence of muonium–antimuonium conversion induced by neutral (pseudo)scalar bosons. Only the SS operator contributes to the conversion of polarized muonium, but it gets quenched by a magnetic field of strength 0.1 Gauss or stronger. Conversion induced by SS couplings for unpolarized muonium is independent of magnetic field. Magnetic fields of 0.1 Tesla or stronger...
متن کاملNew Bounds from Searching for Muonium to Antimuonium Conversion
A new upper limit for the probability of spontaneous muonium to antimuonium conversion was established at P MM ≤ 8.2 · 10 (90%C.L.) in 0.1 T magnetic field, which implies consequences for speculative extensions to the standard model. Coupling parameters in R-parity violating supersymmetry and the mass of a flavour diagonal bileptonic gauge boson can be significantly restricted. A Z8 model with ...
متن کاملar X iv : n uc l - ex / 9 80 50 05 v 1 1 7 M ay 1 99 8 Improved upper limit on Muonium to Antimuonium Conversion
A new experiment has been set up at the Paul Scherrer Institut to search for muonium to antimuonium conversion. No event was found to fulfil the requested signature which consists of the coincident detection of both constituents of the antiatom in its decay. Assuming an effective (V-A)×(V-A) type interaction an improved upper limit is established for the conversion probability of P MM ≤ 8 · 10 ...
متن کاملMuonium-antimuonium conversion in models with dilepton gauge bosons.
We examine the magnetic field dependence of the muonium(μe)antimuonium(μe) conversion in the models which accommodate the dilepton gauge bosons. The effective Hamiltonian for the conversion due to dileptons turns out to be in the (V −A)× (V +A) form and, in consequence, the conversion probability is rather insensitive to the strength of the magnetic field. The reduction is less than 20% for up ...
متن کاملMuonium-Antimuonium oscillations and massive Majorana neutrinos
The electron and muon number violating muonium-antimuonium oscillation process can proceed provided neutrinos have non-zero masses and mix among the various generations. Modifying the Standard Model only by the inclusion of singlet right handed neutrino fields and allowing for general neutrino masses and mixings, the leading order matrix element contributing to this process is computed. For the...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 1996
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.77.1950