6533b7d9fe1ef96bd126c4cc
RESEARCH PRODUCT
Search at the Mainz Microtron for light massive gauge bosons relevant for the muon g-2 anomaly.
L. CorreaT. BeranekA. G. DenigU. MüllerS. ŠIrcaIvica FriščićConcettina SfientiL. DebenjakJ. BeričičDamir BosnarA. TyukinMichaela ThielS. KegelM. O. DistlerB. S. SchlimmeM. Gómez Rodríguez De La PazL. NungesserS. Sánchez MajosC. Ayerbe GayosoD. G. MiddletonR. BöhmF. SchulzM. MihovilovicP. AchenbachM. RohrbeckM. SchothHarald MerkelJan C. BernauerAnselm EsserGuy RonH. FonvieilleA. WeberJ. PochodzallaY. KohlM. HoekM. Weinriefersubject
PhysicsGauge bosonParticle physicsMuonAnomalous magnetic dipole momentPhysics beyond the Standard ModelGeneral Physics and AstronomyDark photonNATURAL SCIENCES. Physics.Nuclear physicsPRIRODNE ZNANOSTI. Fizika.U(1)SPair productiondark photondark photon; U(1)SAnomaly (physics)Nuclear ExperimentMicrotrondescription
A massive, but light, Abelian U(1) gauge boson is a well-motivated possible signature of physics beyond the standard model of particle physics. In this Letter, the search for the signal of such a U(1) gauge boson in electron-positron pair production at the spectrometer setup of the A1 Collaboration at the Mainz Microtron is described. Exclusion limits in the mass range of 40 MeV/c^{2} to 300 MeV/c^{2}, with a sensitivity in the squared mixing parameter of as little as ε^{2}=8×10^{-7} are presented. A large fraction of the parameter space has been excluded where the discrepancy of the measured anomalous magnetic moment of the muon with theory might be explained by an additional U(1) gauge boson.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-01-01 | Physical review letters |