Antiproton–helium 3 annihilation at 55 MeV/c

Authors :: F. Tosello
M.P. Bussa
Germano Bonomi
L. Busso
L. Ferrero
F. Balestra
A. Maggiora
Andrea Ferrero
A. Grasso
G. Piragino
E. Lodi Rizzini
G.B. Pontecorvo
L. Venturelli
M.L. Colantoni
Aldo Zenoni
Andrea Bianconi
C. Guaraldo
M. Maggiora
Source :: Physics Letters B. 492:254-258
Publication Year :: 2000
Publisher :: Elsevier BV, 2000.
Abstract: The p 3He annihilation cross section is measured for the first time in the momentum interval (50÷60) MeV/c. About 9000 pictures collected by the Streamer Chamber Collaboration (PS179) at LEAR–CERN have been scanned. Six events are found, corresponding to σann=1850±700 mb. The result is compared to the set of measurements presently available in the region of low p momentum.