On the consistency of LEAR and FENICE experiments in the sector of P(P)over-bar interaction near the threshold

Citation
M. Majewski et al., On the consistency of LEAR and FENICE experiments in the sector of P(P)over-bar interaction near the threshold, ACT PHY P B, 30(4), 1999, pp. 987-1000
Citations number
38
Categorie Soggetti
Physics
Journal title
ACTA PHYSICA POLONICA B
ISSN journal
05874254 → ACNP
Volume
30
Issue
4
Year of publication
1999
Pages
987 - 1000
Database
ISI
SICI code
0587-4254(199904)30:4<987:OTCOLA>2.0.ZU;2-K
Abstract
Some experiments at LEAR showed unusual behavior of the p (p) over bar inte raction near the threshold. The experiments on p (p) over bar forward scatt ering detected zeros and a big variation of rho and at the same time a smoo th rising of sigma(tot) with lowering energy. Many models have difficulties in explaining this fact. In the PS-170 experiment with a good statistical accuracy, the unexpected behavior of the proton electromagnetic form factor was found. All these experiments can be considered as an indication for th e existence of a low-lying p (p) over bar bound state 'baryonium'. This sta tement coincides with that made for interpreting of the energy dependence o f the total cross-section of the reaction e(+)e(-) --> hadrons in FENICE. T here is a model (based on analyticity) which explains afore-mentioned exper iments and the fact that the 'baryonium' is not seen in the OBELIX p (p) ov er bar annihilation cross-section. Thus, LEAR and FENICE experiments are co nsistent near the p (p) over bar threshold and testify to the existence of 'baryonium'.