Elsevier

Nuclear Physics B

Volume 156, Issue 1, 27 August 1979, Pages 111-125
Nuclear Physics B

Study of diffraction dissociation and double resonance production in the final state pp π+π at 7.2 GeV/c

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Abstract

On 8 K events of the reaction ppπ+π at 7.23 GeV/c simple selection on angular parameters is performed yielding a sample of events with the typical features of diffraction dissociation. A cross section of 1.22 ± 0.08 mb (in two vertices) and a slope of the t distribution of 12.6 ± 1.0 GeV−2 for −t < 0.1 GeV2 are obtained for the diffraction fraction dissociation p → pπ+π + c.c. Using an analogous selection procedure, another sample of events is isolated that is characterized by double resonance production. Cross sections for ΔΔ and ΔΔ′ + c.c. production amount to 1.27 ± 0.09 mb and 0.23 ± 0.07 mb respectively. Diffraction dissociation and double resonance production together make up for 87% of the total cross section for the reaction ppppπ+π, which is 3.11 ± 0.13 mb.

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    This investigation is part of the joint research programs of F.O.M. and Z.W.O.

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