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Published January 2013 | Submitted + Published
Journal Article Open

Scrutinizing the Higgs signal and background in the 2e2µ golden channel


Kinematic distributions in the decays of the newly discovered resonance to four leptons are a powerful probe of the tensor structure of its couplings to electroweak gauge bosons. We present analytic calculations for both signal and background of the fully differential cross section for the 'Golden Channel' e^+ e^− μ^+ μ^− final state. We include all interference effects between intermediate gauge bosons and allow them to be on- or off-shell. For the signal we compute the fully differential decay width for general scalar couplings to ZZ, γγ, and Zγ. For the background we compute the leading order fully differential cross section for qq annihilation into Z and γ gauge bosons, including the contribution from the resonant Z → 2e2μ process. We also present singly and doubly differential projections and study the interference effects on the differential spectra. These expressions can be used in a variety of ways to uncover the nature of the newly discovered resonance or any new scalars decaying to neutral gauge bosons which might be discovered in the future.

Additional Information

© 2013 Springer. Published for SISSA by Springer. This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. Received: November 26, 2012. Accepted: December 24, 2012. Published: January 30, 2013. We thank Joe Lykken, Ian Low, Andrei Gritsan, and Maria Spiropulu for helpful discussions. R.V.M. is especially grateful to Kunal Kumar for help with validation and numerous discussions. N.T. is grateful to Andrew Whitbeck and Ian Anderson for consultation. R.V.M. is supported by the Fermilab Graduate Student Fellowship program. Y.C. is supported by the Weston Havens Foundation and DOE grant DE-FG02-92-ER-40701. This research is also partially supported by Fermi Research Alliance, LLC under Contract No. De-AC02-07CH11359 with the United States Department of Energy.

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Published - Chen_2013p182.pdf

Submitted - 1211.1959v4.pdf


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