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Gluon-initiated associated production boosts Higgs physics.

Englert, Christoph and McCullough, Matthew and Spannowsky, Michael (2014) 'Gluon-initiated associated production boosts Higgs physics.', Physical review D., 89 (1). 013013.


Analyses of boosted Higgs bosons from associated production comprise some of the main search channels for the Higgs boson at the LHC. The gluon-initiated gg→hZ subprocess has largely been ignored in phenomenological analyses of boosted associated production although this contribution is sizable as the pT spectrum for this process is maximized in the boosted regime due to the top quark loop threshold. In this paper, we discuss this contribution to boosted pp→hZ analyses in detail. We find there are previously overlooked modifications of standard model Higgs rates at the LHC which depend on the pT cuts applied and can be significant. There are also important consequences for physics beyond the standard model as the gg→hZ process introduces significant dependence on the magnitude and sign of the Higgs-top quark coupling ct, which is overlooked if it is assumed that associated production depends only on the Higgs-Z boson coupling as c2V. This new dependence on ct impacts interpretations of Higgs rates in the contexts of supersymmetry, two Higgs doublet models, and general scenarios with modified couplings. We suggest that these effects be included in current and future LHC boosted Higgs analyses.

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Publisher statement:Reprinted with permission from the American Physical Society: Physical Review D 89, 013013 © 2014 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
Date accepted:No date available
Date deposited:27 April 2015
Date of first online publication:January 2014
Date first made open access:No date available

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