In the reaction π- + A → π+ π- π- + A at 15.1 GeV/c the coherently produced 3π mass spectrum has a broad peak around 1.1 GeV which consists mainly of a JP = 1+ state and of a smaller fraction of 0-. Comparing the observed dependence of the production of these diffractive states on the atomic weight A of the target nuclei with the optical model, we have studied the absorption of the produced states in nuclear matter. We have found the following values of the absorption cross-sections: σ2(0-) = 49-7+9 mb and σ2(1+) = 15.8-1.3+1.5 mb.
Evidence that absorption in the π+ π− π− system in nuclear matter is stronger in the JP = 0− than in the JP = 1+ state / W. Beusch, E. Polgar, D. Websdale, K. Freudenreich, F. Gentit, P. Muhlemann, J. Pernegr, W. Wetzel, P. Astbury, J. Lee, M. Letheren, G. Bellini, M. Di Corato, F. Palombo, P. Rancoita, G. Vegni. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 55:1(1975), pp. 97-100.
Evidence that absorption in the π+ π− π− system in nuclear matter is stronger in the JP = 0− than in the JP = 1+ state
G. Bellini;M. Di Corato;F. Palombo;G. Vegni
1975
Abstract
In the reaction π- + A → π+ π- π- + A at 15.1 GeV/c the coherently produced 3π mass spectrum has a broad peak around 1.1 GeV which consists mainly of a JP = 1+ state and of a smaller fraction of 0-. Comparing the observed dependence of the production of these diffractive states on the atomic weight A of the target nuclei with the optical model, we have studied the absorption of the produced states in nuclear matter. We have found the following values of the absorption cross-sections: σ2(0-) = 49-7+9 mb and σ2(1+) = 15.8-1.3+1.5 mb.
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