The final results of a bubble chamber experiment on double pion photoproduction in deuterium, from threshold up to 1 GeV, are reported. The total cross-sections of reactions γn→nπ -π +, γn→pπ -π 0 and γp→pπ +π - are calculated, by using the spectator model. The squared-mass distributions have been fitted, and the cross-sections of reactions γn→Δ -π +, γn→Δ +π -→pπ 0π - and γp→Δ ++π - have been obtained. The general features of these cross-sections are consistent with a large nonresonant Δ production, accounted for in a gauge-invariant OPE model. © 1976 Società Italiana di Fisica.

Analysis of γn→nπ +π - and γn→pπ -π 0 reactions from threshold up to 1 GeV / F., Carbonara; Chiefari, Giovanni; E., Drago; G., Gialanella; Merola, Leonardo; Napolitano, Marco; R., Rinzivillo; Sciacca, Crisostomo; V., Rossi; G., Susinno. - In: NUOVO CIMENTO DELLA SOCIETÀ ITALIANA DI FISICA. A. - ISSN 1124-1853. - STAMPA. - 36:(1976), pp. 219-234. [10.1007/BF02724576]

Analysis of γn→nπ +π - and γn→pπ -π 0 reactions from threshold up to 1 GeV

CHIEFARI, GIOVANNI;MEROLA, LEONARDO;NAPOLITANO, MARCO;SCIACCA, CRISOSTOMO;
1976

Abstract

The final results of a bubble chamber experiment on double pion photoproduction in deuterium, from threshold up to 1 GeV, are reported. The total cross-sections of reactions γn→nπ -π +, γn→pπ -π 0 and γp→pπ +π - are calculated, by using the spectator model. The squared-mass distributions have been fitted, and the cross-sections of reactions γn→Δ -π +, γn→Δ +π -→pπ 0π - and γp→Δ ++π - have been obtained. The general features of these cross-sections are consistent with a large nonresonant Δ production, accounted for in a gauge-invariant OPE model. © 1976 Società Italiana di Fisica.
1976
Analysis of γn→nπ +π - and γn→pπ -π 0 reactions from threshold up to 1 GeV / F., Carbonara; Chiefari, Giovanni; E., Drago; G., Gialanella; Merola, Leonardo; Napolitano, Marco; R., Rinzivillo; Sciacca, Crisostomo; V., Rossi; G., Susinno. - In: NUOVO CIMENTO DELLA SOCIETÀ ITALIANA DI FISICA. A. - ISSN 1124-1853. - STAMPA. - 36:(1976), pp. 219-234. [10.1007/BF02724576]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/469681
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