论文标题
抑制高能碰撞中的electroweak instanton过程
Suppression of Electroweak Instanton Processes in High-energy Collisions
论文作者
论文摘要
Electroweak Instantons是标准模型的预测，尽管没有观察到它们，但过去已经对其进行了详细的研究。对山脉偶Instanton生产横截面的早期计算表明，它在低能量下被指数抑制，但在Spheron质量以上的能量（大多数）时可能会大大抑制。这种计算在高能制度中的Instanton扰动理论的崩溃中面临困难。在本文中，我们使用光学定理回顾了electroweak intsanton横截面的计算，包括在初始状态中相互作用引起的量子效应，并表明这导致了对横截面的指数抑制，从而使过程变得难以观察。
Electroweak instantons are a prediction of the Standard Model and have been studied in great detail in the past although they have not been observed. Earlier calculations of the instanton production cross section at colliders revealed that it was exponentially suppressed at low energies, but may grow large at energies (much) above the sphaleron mass. Such calculations faced difficulty in the breakdown of the instanton perturbation theory in the high-energy regime. In this paper we review the calculation for the electroweak instanton cross section using the optical theorem, including quantum effects arising from interactions in the initial state and show that this leads to an exponential suppression of the cross section at all energies, rendering the process unobservable.
