Evidence for π+π− resonance at 1.5–1.6 GeV in 4.7 Ge Vc π-p- interaction

Physics Letters Pub Date : 1966-12-19 DOI:10.1016/0031-9163(66)91111-5

V.M. Guzhavin, G.K. Kliger, V.Z. Kolganov, A.V. Lebedev, G.S. Lomkatsi, V.T. Smolyankin, A.P. Sokolov, J.A. Vetlitsky

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Abstract

Among 60 000 pictures obtained by means of 55 cm hydrogen bubble chamber exposed with 4.7 $Ge V c$ π^- beam 349 events of the reaction π^-p → π⁺π^-n at small four momentum transfer have been selected. The distribution of the effective mass of π⁺π⁻ system shows ϱ^o-, f^o- resonances and some enhancement at 1.5 - 1.6 GeV that may be interpreted as a resonance with M = 1549 ±30 MeV, Γ = 100 ±25 MeV.

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4.7 GeV Vc π-p-相互作用中π+π−在1.5-1.6 GeV的共振证据

用4.7 Ge Vc π-束照射55 cm氢气泡室获得的6万幅图像中，选出了小四动量转移时π-p→π+π-n反应的349个事件。π+π−体系的有效质量分布表现为ϱo-、fo-共振，在1.5 ~ 1.6 GeV处有一定的增强，可以解释为M = 1549±30 MeV， Γ = 100±25 MeV的共振。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physics Letters

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