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Measuring rare and exclusive Higgs boson decays into light resonances.

Chisholm, Andrew S. and Kuttimalai, Silvan and Nikolopoulos, Konstantinos and Spannowsky, Michael (2016) 'Measuring rare and exclusive Higgs boson decays into light resonances.', European physical journal C., 76 (9). p. 501.


We evaluate the LHC’s potential of observing Higgs boson decays into light elementary or composite resonances through their hadronic decay channels. We focus on the Higgs boson production processes with the largest cross sections, pp→h pp→h and pp→h+jet pp→h+jet , with subsequent decays h→ZA h→ZA or h→Zη c h→Zηc , and comment on the production process pp→hZ pp→hZ . By exploiting track-based jet substructure observables and extrapolating to 3000 fb −1 3000 fb−1 we find BR(h→ZA)≃BR(h→Zη c )≲0.02 BR(h→ZA)≃BR(h→Zηc)≲0.02 at 95 % CL. We interpret this limit in terms of the 2HDM Type 1. We find that searches for h→ZA h→ZA are complementary to existing measurements and can constrain large parts of the currently allowed parameter space.

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Publisher statement:© The Author(s) 2016 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP3.
Date accepted:29 August 2016
Date deposited:01 February 2017
Date of first online publication:14 September 2016
Date first made open access:01 February 2017

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