Higgs decay into four charged leptons in the presence of dimension-six operators

• Main Authors: Stefano Boselli, Carlo M. Carloni Calame, Guido Montagna, Oreste Nicrosini, Fulvio Piccinini, Ambresh Shivaji
• Format: Article
• Language: English
• Published: SpringerOpen 2018-01-01
• Series: Journal of High Energy Physics
• Subjects: Beyond Standard Model; Effective Field Theories; Higgs Physics
• Online Access: http://link.springer.com/article/10.1007/JHEP01(2018)096

Abstract We study the indirect effects of New Physics in the Higgs decay into four charged leptons, using an Effective Field Theory (EFT) approach to Higgs interactions. We evaluate the deviations induced by the EFT dimension-six operators in observables like partial decay width and various kinematic distributions, including angular observables, and compare them with the contribution of the full SM electroweak corrections. The calculation is implemented in an improved version of the event generator Hto4l, which can provide predictions in terms of different EFT-bases and is available for data analysis at the LHC. We also perform a phenomenological study in order to assess the benefits coming from the inclusion of differential information in the future analyses of very precise data which will be collected during the high luminosity phase of the LHC.