POSSIBLE SIGNATURE OF THE BARYON-SYMMETRICAL-UNIVERSE IN THE DIFFUSE-RADIATION AND LIFETIME OF ANTIPROTONS

We have calculated the spectrum of diffuse radiation in the energy reg ion 0.1 KeV to 500 MeV, which arises from the decay of antiprotons in the Symmetric Universe. Among the few features noticed in this calcula ted spectrum, the cut-off above 450 MeV is the most important one. If this feature is identified in the future observations as an 'edge' in the diffuse spectrum, it will provide the evidence for the Symmetric U niverse. It will also allow the determination of the life time of anti protons and provide the first evidence for CPT violation. From a compa rison with the available data, we estimate the partial life time of an antiproton as > 3 x 10(24) s, if We live in a symmetric universe. Thi s limit is 17 orders of magnitude better than that obtained from direc t experiments and is about 16 orders of magnitude smaller than the lim it set for protons.