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Resolving the tensor structure of the Higgs coupling to Z bosons via Higgs-strahlung.

Banerjee, Shankha and Gupta, Rick S. and Reiness, Joey Y. and Spannowsky, Michael (2019) 'Resolving the tensor structure of the Higgs coupling to Z bosons via Higgs-strahlung.', Physical review D, 100 (11). p. 115004.


We propose differential observables for pp → Zðlþl−Þhðb¯bÞ that can be used to completely determine the tensor structure of the hZZ=hZ¯ff couplings relevant to this process in the dimension-six Standard Model (SM) effective field theory. In particular, we propose a strategy to probe the anomalous hZμνZμν and hZμν ˜Z μν vertices at the percent level.We show that this can be achieved by resurrecting the interference term between the transverse Zh amplitude, which receives contributions from the above couplings, and the dominant SM longitudinal amplitude. These contributions are hard to isolate without knowledge of the analytical amplitude, as they vanish unless the process is studied differentially in three different angular variables at the level of the Z-decay products. By also including the differential distributions with respect to energy variables, we obtain projected bounds for the two other tensor structures of the Higgs coupling to Z bosons.

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Publisher statement:Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Date accepted:No date available
Date deposited:05 December 2019
Date of first online publication:03 December 2019
Date first made open access:05 December 2019

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