hhjj production at the LHC

Dolan, M. J., Englert, C. , Greiner, N., Nordstrom, K. and Spannowsky, M. (2015) hhjj production at the LHC. European Physical Journal C, 75, 387. (doi: 10.1140/epjc/s10052-015-3622-3)

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The search for di-Higgs production at the LHC in order to set limits on the Higgs trilinear coupling and constraints on new physics is one of the main motivations for the LHC high-luminosity phase. Recent experimental analyses suggest that such analyses will only be successful if information from a range of channels is included. We therefore investigate di-Higgs production in association with two hadronic jets and give a detailed discussion of both the gluon- and the weak boson-fusion (WBF) contributions, with a particular emphasis on the phenomenology with modified Higgs trilinear and quartic gauge couplings. We perform a detailed investigation of the full hadronic final state and find that hhjj production should add sensitivity to a di-Higgs search combination at the HL-LHC with 3 ab−1. Since the WBF and GF contributions are sensitive to different sources of physics beyond the Standard Model, we devise search strategies to disentangle and isolate these production modes. While gluon fusion remains non-negligible in WBF-type selections, sizeable new physics contributions to the latter can still be constrained. As an example of the latter point we investigate the sensitivity that can be obtained for a measurement of the quartic Higgs–gauge boson couplings.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Englert, Professor Christoph
Authors: Dolan, M. J., Englert, C., Greiner, N., Nordstrom, K., and Spannowsky, M.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:European Physical Journal C
Publisher:Springer Berlin Heidelberg
ISSN (Online):1434-6052
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in European Physical Journal C 75:387
Publisher Policy:Reproduced under a Creative Commons License

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