Dark Forces at Accelerators

Session

Meson and nuclear decays

16 Oct 2012, 16:30

Aula B. Touschek, Bldg 36 (INFN-LNF)

17. U boson search in phi dalitz decays with KLOE

Ivano Sarra (LNF)

16/10/2012, 16:30

We have searched for a new neutral gauge vector boson (U boson) in phi(1020) to eta e+e- decays, using about 1.8 fb-1 of data collected by the KLOE detector. The present analysis is based on an identication of the eta meson by its decays into three neutral pions, which provides a sample about twice larger than the one used in our previously published result. The limit on U boson...

11. Search for a new gauge boson in π0 decays with WASA-at-COSY

Mr Carl-Oscar Gullstroem (Uppsala University)

16/10/2012, 17:05

Decays of the π0 allows to search mediates gauge bosons of dark forces in the MeV range. The decay π 0 → e+ e−γ is sensitive to a "dark photon" that decays into an e+ e− pair. WASA-at-COSY has collected a 500k data sample to constrains the parameters of this hypothetical gauge boson. The rare decay π 0 → e+ e− might also probe physics beyond the standard model. The 3σ deviation between...

34. Search for a light neutral boson in nuclear transitions

Prof. Attila Krasznahorkay (Inst. of Nucl. Res. of the Hung. Acad. of Sci. (ATOMKI), Head, Division of Nuclear Physics)

16/10/2012, 17:40

In a recent series of papers the intriguing possibility was explored that the cosmic dark matter consists of new elementary particles with masses in the MeV range, which could be searched for in nuclear physics laboratories. Such particles are not excluded by any obvious laboratory measurements or astrophysical arguments. There are even some experimental indications for a light neutral...