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arXiv 1001.4486hep-phhep-ex
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pi pi相移分析中无f0(1370)迹象

No indication of f0(1370) in pi pi phase shift analyses

Wolfgang Ochs

摘要:

标量介子f_0(1370)--特别是在低能p \bar p \to三体反应中指出的--是包括胶球在内的标量介子谱的某些方案中的关键元素。最明确的结果可以从弹性和非弹性π π相移分析,使用的约束条件,从单一的离散模糊度可以识别和解决。我们重新考虑了π ^+ π ^- \to π + π-,π ^0 π ^0,K \bar K,eta eta的相移分析。而在f_0(1500)处的共振信号明显。从f_0(600)的大"背景“以上的所有通道中可以看到Argand图,在任何反应中,在\sim 10%分支比到pi-pi的水平下,在该质量范围内没有第二共振" f_0(1370 Ω”的明确信号。

英文摘要:

The scalar meson f_0(1370) - indicated in particular in the low energy p\bar p \to 3 body reactions - is a crucial element in certain schemes of the scalar meson spectroscopy including glueballs. The most definitive results can be obtained from elastic and inelastic pi pi phase shift analyses using the constraints from unitarity where the discrete ambiguities can be identified and resolved. We reconsider the phase shift analyses for pi^+ pi^- \to pi+ π-, pi^0 pi^0, K \bar K, eta eta. While a clear resonance signal for f_0(1500) in the resp. Argand diagrams is seen in all channels above a large ``background'' from f_0(600) there is no clear signal of a second resonance ``f_0(1370)'' in this mass range in any reaction, at the level of \sim 10% branching ratio into pi-pi.

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