BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//INFN-LNF - ECPv5.14.2.1//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:INFN-LNF
X-ORIGINAL-URL:https://w3.lnf.infn.it
X-WR-CALDESC:Eventi per INFN-LNF
BEGIN:VTIMEZONE
TZID:Europe/Rome
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20190331T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20191027T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190920T143000
DTEND;TZID=Europe/Rome:20190920T160000
DTSTAMP:20260422T064632
CREATED:20190819T184742Z
LAST-MODIFIED:20190927T184728Z
UID:20441-1568989800-1568995200@w3.lnf.infn.it
SUMMARY:A search for the A-prime particle at JLab and a proposal for a Very Asymmetric Collider.
DESCRIPTION:  \nA 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.
URL:/event/a-search-for-the-a-prime-particle-at-jlab-and-a-proposal-for-a-very-asymmetric-collider/
LOCATION:Aula Salvini
CATEGORIES:Seminari generali
END:VEVENT
END:VCALENDAR