6533b860fe1ef96bd12c38f4
RESEARCH PRODUCT
Invisible width of the Z-boson and “secret” ν-ν interactions
M. S. BilenkyArcadi SantamariaSamoil M. Bilenkysubject
Nuclear physicsPhysicsNuclear and High Energy PhysicsParticle physicsSupernovaOrders of magnitude (time)Spectrum (functional analysis)High Energy Physics::ExperimentElementary particleNeutrinoUpper and lower boundsLeptonBosondescription
Abstract The width of the decay Z→ν ν ν ν in the presence of a possible nonstandard four-fermion ν-ν interaction is calculated. From the invisible width of the Z-boson measured at LEP the upper bound on the strength F of such an effective interaction has been obtained: F≲4×102GF. This bound is about three orders of magnitude lower than earlier existing particle physics bounds and it is comparable with an estimate that can be obtained from supernova neutrino data. The expression for the spectrum of leptons in the decays W→lν l ν ν is also presented.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-03-01 | Physics Letters B |