有限温度下φ介子的传播和衰减

K. Haglin
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引用次数: 0

摘要

利用有效拉格朗日和有限温度场理论,研究了有限温度下φ介子的光谱性质。然后用一般场论论证建立了φ在热强子物质中的寿命。我们从模型中发现,因此我们提出了一个场景,在这个场景中,在火球内部衰减。早期衰变为μ+μ-发生在高温下,而可测量的强子衰变为K+K-(不受再散射影响)发生在冻结时,此时流动可能很大。这些结果提供了一致的图像,如果不可能解释来自CERN的NA49和NA50数据。
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ϕ Meson Propagation and Decay at Finite Temperature
We study spectral properties of the φ meson at finite temperature using an effective Lagrangian together with finite-temperature field theory as a basis for modeling. General field-theoretic arguments are then used to establish the lifetime of φ in hot hadronic matter. We find from the model, and we therefore propose a scenario in which, the phi decays inside the fireball. Early decays into μ+μ- occur at high temperature while measurable hadronic decays into K+K- (not suffering rescattering) occur at freezeout, where flow could be substantial. These results provide a consistent picture, if not possible interpretation of NA49 and NA50 data from CERN.
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