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Infrared safety (particle physics) : ウィキペディア英語版 | Infrared safety (particle physics) In particle physics, and especially asymptotically free quantum field theories, an observable is infrared safe if it does not depend on the low energy/long distance physics of the theory. Such observables can therefore be calculated reliably using perturbative methods and then compared to experiment.〔 〕〔 〕 An example of an observable which is infrared safe is the total scattering cross-section for the collision of an electron and a positron to produce hadrons.〔 〕 ==See also==
* Asymptotic freedom * Infrared divergence * Kinoshita-Lee-Nauenberg theorem
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Infrared safety (particle physics)」の詳細全文を読む
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