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Two-pion annihilation into e(+) e(-) pairs in relativistic non-linear models

机译:相对论非线性模型中的两点ion灭成e(+)e(-)对

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摘要

We have studied the pi(+)pi(-) -> e(+)e(-) process in dense and hot nuclear matter using relativistic non-linear models taking into account all scalar-vector coupling terms up to fourth order in the Lagrangian. We have determined the influence of non-linear terms on the cross section and dilepton production rate in both isoscalar and isovector channels. For one of the models considered, we have found an enhancement of the pi(+)pi(-) -> p e(+)e(-) dilepton production rate in the low invariant mass region as required by the experimental data. (c) 2005 Elsevier B.V All rights reserved.
机译:我们使用相对论非线性模型研究了稠密和热核物质中的pi(+)pi(-)-> e(+)e(-)过程,并考虑了所有标量矢量耦合项,直到拉格朗日。我们已经确定了非线性项对等标量通道和等矢量通道中的横截面和Dilepton生产率的影响。对于所考虑的模型之一,我们发现在低不变质量区域中pi(+)pi(-)-> p e(+)e(-)dilepton生产率提高了,这是实验数据所要求的。 (c)2005 Elsevier B.V保留所有权利。

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