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首页> 外文期刊>Physical review, C >Theoretical study of the Lambda (1405) resonance in Xi(0)(b) - D-0(pi Sigma) decay
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Theoretical study of the Lambda (1405) resonance in Xi(0)(b) - D-0(pi Sigma) decay

机译:XI(0)(b) - &gt中的Lambda(1405)共振的理论研究 - & D-0(Pi Sigma)衰减

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摘要

We study the mechanism of the weak decay process of Xi(0)(b) into D-0 with ameson-baryon pair. It is shown that the dominant component of the prompt weak decay produces the meson-baryon pair with the spectator strange quark being transferred to the baryon, so that the (K) over barN channel is absent. Subsequent final state interaction then reflects the pi Sigma originated Lambda (1405) formation amplitude, which has been difficult to access in previous experimental studies. We predict the line shapes of the pi Sigma invariant mass distribution using a realistic chiral meson-baryon amplitude for the final state interaction. It is shown that the interference between the direct and the rescattering contributions can strongly distort the peak structure of the Lambda (1405) in the mass distribution. This indicates the necessity of a detailed investigation of the reaction mechanism in order to extract the Lambda (1405) property in the pi Sigma mass distribution.
机译:通过Ameson-Baryon对研究Xi(0)(b)Xi(0)(b)的弱衰变过程的机制。 结果表明,提示弱衰减的主导部件产生与观众奇怪的夸克被转移到胸轭的偏振子 - Baryon对,从而不存在(k)上谷仓通道。 然后,随后的最终状态相互作用反映了Pi Sigma发起的λ(1405)形成幅度,这难以在先前的实验研究中获得。 我们预测使用用于最终状态相互作用的逼真的手性偏执振振振振振振振振振振振振振振力。 结果表明,直接和振选贡献之间的干扰可以强烈地扭曲λ(1405)的质量分布的峰值结构。 这表明必须详细研究反应机制,以便在PI Sigma质量分布中提取λ(1405)性质。

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