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Closing the wedge: Search strategies for extended Higgs sectors with heavy flavor final states

Gori, Stefania and Kim, Ian-Woo and Shah, Nausheen R. and Zurek, Kathryn M. (2016) Closing the wedge: Search strategies for extended Higgs sectors with heavy flavor final states. Physical Review D, 93 (7). Art. No. 075038. ISSN 2470-0010. doi:10.1103/physrevd.93.075038.

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We consider search strategies for an extended Higgs sector at the high-luminosity LHC14 utilizing multitop final states. In the framework of a two Higgs doublet model, the purely top final states (tt̄, 4t) are important channels for heavy Higgs bosons with masses in the wedge above 2m_t and at low values of tanβ, while a 2b2t final state is most relevant at moderate values of tanβ. We find, in the tt̄H channel, with H→ tt̄, that both single and three lepton final states can provide statistically significant constraints at low values of tanβ for m_A as high as ∼750  GeV. When systematics on the tt̄ background are taken into account, however, the three lepton final state is more powerful, though the precise constraint depends fairly sensitively on lepton fake rates. We also find that neither 2b2t nor tt̄ final states provide constraints on additional heavy Higgs bosons with couplings to tops smaller than the top Yukawa due to expected systematic uncertainties in the tt̄ background.

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Additional Information:This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. (Received 17 February 2016; published 29 April 2016) We thank Marco Farina, Yuri Gershtein, Moira Gresham, Ben Hooberman, Fabio Maltoni, Michele Papucci, Brian Shuve and Carlos Wagner for the useful conversations. K. Z. is supported by Contract No. DE-AC02-05CH11231. N. R. S. acknowledges the hospitality of the Aspen Center for Physics, which is supported by the National Science Foundation under Grant No. PHYS-1066293.
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Department of Energy (DOE)DE-AC02-05CH11231
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ID Code:96423
Deposited By: George Porter
Deposited On:17 Jun 2019 23:28
Last Modified:16 Nov 2021 17:20

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