EVIDENCE FOR A T = 0 $pi$$sup +$$-$$pi$$sup -$ RESONANCE AT 1250 Mev
The Regge-pole elementary particle theory predicts the existence of a spin-2 particle having the quantum numbers of the vacuum and with a mass of the order of 1.0 to 1.4 Bev. The particle could decay into two pi mesons and should be observed as a pi - pi resonance with isotopic spin T = 0. Experimental evidence is presented for the existence of such a particle. Using a 3 Bev/c separated pi - beam and the BNL 20-inch hydrogen bubble chamber, the reactions pi /sup -/ + p yields pi /sup -/ + pi /sup 0/ + p and pi /sup -/ + p yields pi /sup -/ + pi /sup +/ + n were studied. Plots of the data obtained irom these reactions are presented and analyzed. It is concluded that there is evidence for a T = 0 particle or resonance, the f/sup 0/, at an energy of 1250 plus or minus 25 Mev, with a width of 100 plus or minus 50 Mev. The spin was not determined, but is thought to be either 0 or 2. (H.D.R.)
- Research Organization:
- Univ. of Pennsylvania, Philadelphia and Brookhaven National Lab., Upton, N.Y.
- NSA Number:
- NSA-17-004005
- OSTI ID:
- 4773558
- Journal Information:
- Phys. Rev. Letters, Journal Name: Phys. Rev. Letters Vol. Vol: 9
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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