Départment de Physique Théorique, Université de Genève, 24 quai Ernest-Ansermet, 1211 Genève 4, Switzerland.
Phys Rev Lett. 2019 Nov 1;123(18):181801. doi: 10.1103/PhysRevLett.123.181801.
The measurement of Higgs couplings constitutes an important part of present standard model precision tests at colliders. We show that modifications of Higgs couplings induce energy-growing effects in specific amplitudes involving longitudinally polarized vector bosons, and we initiate a novel program to study these effects off shell and at high energy, rather than on the Higgs resonance. Our analysis suggests that these channels are complementary and competitive with familiar on-shell measurements; moreover, they offer endless opportunities for refinement and improvements.
希格斯耦合的测量是当前在对撞机上进行标准模型精密测试的一个重要部分。我们表明，希格斯耦合的修正会在涉及纵向极化矢量玻色子的特定振幅中产生能量增长效应，并且我们启动了一个新的计划来研究这些在离壳和高能状态下的效应，而不是在希格斯共振状态下。我们的分析表明，这些通道与熟悉的在壳测量是互补和竞争的；此外，它们还为改进和完善提供了无尽的机会。
