arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2011.07167hep-phhep-th
收藏

高能碰撞中电弱瞬子过程的抑制

Suppression of Electroweak Instanton Processes in High-energy Collisions

Valentin V. Khoze, Daniel L. Milne

摘要:

电弱瞬子是标准模型的一个预测,虽然没有被观测到,但在过去已经被详细研究过了。早期对对撞机产生的瞬子截面的计算显示,它在低能量时被指数抑制,但在能量(远)高于闪锌矿质量时可能会变大。这种计算在高能区的瞬子微扰理论崩溃时面临困难。在本文中,我们回顾了计算的电弱瞬子截面使用的光学定理,包括量子效应所产生的相互作用在初始状态,并表明,这将导致指数抑制的截面在所有的能量,呈现不可观察的过程。

英文摘要:

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.

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。

↑