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arXiv 0809.3780hep-ph
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重介子的产生和散射中的双共振

Diresonance in production and scattering of heavy mesons

S. Dubynskiy, M. B. Voloshin

摘要:

我们考虑了重介子在两个窄共振态下的产生和散射振幅,这种窄共振态称为双共振态。假设耦合到公共通道的共振的强重叠,它被发现,使用么正性和解析性约束,在不同的通道中的生产振幅应具有类似的行为与能量。特别地,用于每个极贡献的系数与生产幅度的比率固定为-1。

英文摘要:

We consider the production and scattering amplitudes of heavy mesons in a situation, where there are two closely spaced narrow resonances, which structure we refer to as a diresonance. Assuming strong overlapping of the resonances coupled to common channels, it is found, using the unitarity and analyticity constraints, that the production amplitudes in different channels should have similar behavior with energy. In particular the ratio of the coefficients for each pole contribution to the production amplitude is fixed at -1.

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