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arXiv 1708.07155hep-ph
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共振维诺暗物质的零程有效场论II。库仑恢复

Zero-Range Effective Field Theory for Resonant Wino Dark Matter II. Coulomb Resummation

Eric Braaten, Evan Johnson, Hong Zhang

摘要:

在中性维诺对阈值处存在零能量S波共振的维诺质量的临界值附近,低能维诺可以由零射程有效场论(ZREFT)描述,其中维诺通过接触相互作用非微扰地相互作用,并且带电维诺也具有电磁相互作用。在能量接近维诺对阈值时,带电维诺之间光子交换的库仑相互作用也必须非微扰地处理。ZREFT的参数可以通过匹配wino-wino散射振幅来确定,而散射振幅是通过求解薛定谔方程来计算的。在库仑近似下,ZREFT能很好地描述winos的低能二体观测量。

英文摘要:

Near a critical value of the wino mass where there is a zero-energy S-wave resonance at the neutral-wino-pair threshold, low-energy winos can be described by a zero-range effective field theory (ZREFT) in which the winos interact nonperturbatively through a contact interaction and charged winos also have electromagnetic interactions. At energies near the wino-pair thresholds, the Coulomb interaction from photon exchange between charged winos must also be treated nonperturbatively. The parameters of ZREFT can be determined by matching wino-wino scattering amplitudes calculated by solving the Schrödinger equation for winos interacting through a potential due to the exchange of electroweak gauge bosons. With Coulomb resummation, ZREFT at leading order gives a good description of the low-energy two-body observables for winos.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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