The annihilation frequencies of 19 p̄p annihilation reactions at rest obtained in different target densities are analysed in order to determine the values of the P -wave annihilation percentage at each target density and the average hadronic branching ratios from P - and S-states. Both the assumptions of linear dependence of the annihilation frequencies on the P - wave annihilation percentage of the protonium state and the approach with the enhancement factors of Batty are considered. Furthermore the cases of incompatible measurements are discussed. © 2001 Elsevier Science B.V. All rights reserved.
Contribution from S and P waves in pp̄ annihilation at rest
Bianconi A.;Bonomi G.;Lodi Rizzini E.;Venturelli L.;Zenoni A.;
2001-01-01
Abstract
The annihilation frequencies of 19 p̄p annihilation reactions at rest obtained in different target densities are analysed in order to determine the values of the P -wave annihilation percentage at each target density and the average hadronic branching ratios from P - and S-states. Both the assumptions of linear dependence of the annihilation frequencies on the P - wave annihilation percentage of the protonium state and the approach with the enhancement factors of Batty are considered. Furthermore the cases of incompatible measurements are discussed. © 2001 Elsevier Science B.V. All rights reserved.File in questo prodotto:
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