Higgs Self-Coupling as a Probe of Electroweak Phase Transition

Details Higgs Self-Coupling as a Probe of Electroweak Phase Transition Higgs Self-Coupling as a Probe of Electroweak Phase Transition

2007-11-20

arxiv.org/abs/0711.3018v3

Phys.Rev.D78:063518,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, 6 figures; minor changes to clarify a few points

Scientific paper

10.1103/PhysRevD.78.063518

We argue that, within a broad class of extensions of the Standard Model, there is a tight corellation between the dynamics of the electroweak phase transition and the cubic self-coupling of the Higgs boson: Models which exhibit a strong first-order EWPT predict a large deviation of the Higgs self-coupling from the Standard Model prediction, as long as no accidental cancellations occur. Order-one deviations are typical. This shift would be observable at the Large Hadron Collider if the proposed luminosity or energy upgrades are realized, as well as at a future electron-positron collider such as the proposed International Linear Collider. These measurements would provide a laboratory test of the dynamics of the electroweak phase transition.

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