LNF: A SEARCH FOR THE A-PRIME PARTICLE AT JLAB AND A PROPOSAL FOR A VERY ASYMMETRIC COLLIDER. 
 ELENCO COMPLETO 

DATA: 20-09-2019

LABORATORI NAZIONALI DI FRASCATI
Speaker: Bogdan Wojtsekhowski (JLab) A search was done by using electro-production of a heavy photon (A) in electron scattering from W nuclei with following decay to an electron-positron pair. The experiment was performed at Hall A of Jefferson Lab using a 2.1 GeV beam and collected statistics for a search sensitivity of 0.1 ppm (relative to the coupling of an EM photon). Such a sensitivity is about 10 times better than known from currently published experiments for the A mass near 200 MeV. The experiment and preliminary analysis of the data quality will be presented. In the second part of this talk, I will discuss the search for A in an inverse reaction with a positron-electron annihilation which has an important advantage of being independent of the A decay. The experiment for the mass range above 70 MeV requires a novel experimental technique because typical colliders with cm energy below 500 MeV have insufficient luminosity. The concept of a Very Asymmetric Collider is based on a low energy electron beam accelerator and a high energy positron storage ring. Such a configuration allows us to boost the luminosity to the level of 10$^{34}$ 1/cm$^2$/s.


 SITO COLLEGATO 
https://agenda.infn.it/event/19953/

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