Another look at pi pi scattering in the scalar channel

Another look at pi pi scattering in the scalar channel
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再看一下标量通道中的 pi pi 散射

DOI:
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发表时间:
1998
期刊:
影响因子:
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通讯作者:
K. Hikasa
K. Hikasa
中科院分区:
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文献类型:
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作者:
K. Igi;K. Hikasa

文献摘要

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我们建立了一个通用的框架来描述基于手性低能膨胀的$\pi\pi$在1 GeV以下的散射,可能有自旋为0和自旋为1的共振。用$N/D$方法得到了满足统一性、解析性和近似交叉对称性的部分波幅值。与J=0通道的相移数据比较,有利于$\rho$质量附近的标量共振。
We set up a general framework to describe $\pi\pi$ scattering below 1 GeV based on chiral low-energy expansion with possible spin-0 and 1 resonances. Partial wave amplitudes are obtained with the $N/D$ method, which satisfy unitarity, analyticity and approximate crossing symmetry. Comparison with the phase shift data in the J=0 channel favors a scalar resonance near the $\rho$ mass.