The Higgs Self-Coupling as a Probe of the Electroweak Phase Transition

          @misc{ pirsa_PIRSA:08060171,
            doi = {10.48660/08060171},
            url = {https://pirsa.org/08060171},
            author = {},
            keywords = {Quantum Fields and Strings, Particle Physics, Cosmology},
            language = {en},
            title = {The Higgs Self-Coupling as a Probe of the Electroweak Phase Transition},
            publisher = {Perimeter Institute},
            year = {2008},
            month = {jun},
            note = {PIRSA:08060171 see, \url{https://pirsa.org}}
          }
          

Abstract

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 electroweak phase transition 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.