Enhancing the Higgs associated production with a top quark pair

Badziak, Marcin; Wagner, Carlos E. M.

doi:10.1007/JHEP05(2016)123

Title: Enhancing the Higgs associated production with a top quark pair

Journal Article · Fri May 20 00:00:00 EDT 2016 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/JHEP05(2016)123· OSTI ID:1595719

Badziak, Marcin ^[1]; Wagner, Carlos E. M. ^[2]

Univ. of Warsaw (Poland). Inst. of Theoretical Physics
Univ. of Chicago, IL (United States). Enrico Fermi Inst.; Argonne National Lab. (ANL), Argonne, IL (United States). High Energy Physics Division; Univ. of Chicago, IL (United States). Kavli Inst. for Cosmological Physics (KICP)

It is pointed out that in a wide class of models reminiscent of type-II Two-Higgs-Doublet Models (2HDM) the signal of the Higgs produced in association with a top-antitop quark pair ($tth$) and decaying into gauge bosons can be significantly larger than the Standard Model (SM) prediction without violating any experimental constraints. The crucial feature of these models is enhanced (suppressed) Higgs coupling to top (bottom) quarks and existence of light colored particles that give negative contribution to the effective Higgs coupling to gluons resulting in the gluon fusion rates in the gauge boson decay channels close to SM predictions. We demonstrate this mechanism in NMSSM with light stops and show that $tth$ signal in the W W decay channel can be two times larger than the SM prediction, as suggested by the excesses observed by ATLAS and CMS, provided that the Higgs-singlet superpotential coupling $λ ≳$ 0.8 and the MSSM-like Higgs boson masses are in the range of 160 to 300 GeV.

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Research Organization:: Univ. of Chicago, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); National Science Centre (NCN) (Poland); Polish Ministry of Science and Higher Education; National Science Foundation (NSF)

Grant/Contract Number:: SC0009924; DEC-2014/15/B/ST2/02157; AC02-06CH11357; FG02-13ER41958; PHYS-1066293

OSTI ID:: 1595719

Report Number(s):: arXiv:1602.06198; TRN: US2101780

Journal Information:: Journal of High Energy Physics (Online), Vol. 2016, Issue 5; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 10 works

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