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

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 ($$t\bar{t}$$, 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 $$t\bar{t}$$ H channel, with H→$$t\bar{t}$$, that both single and three lepton final states can provide statistically significant constraints at low values of tanβ for mA as high as ~750 GeV. When systematics on the $$t\bar{t}$$ 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 $$t\bar{t}$$ 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 tt background.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Perimeter Inst. for Theoretical Physics, Waterloo, ON (Canada); Univ. of Cincinnati, OH (United States). Dept. of Physics
  2. European Organization for Nuclear Research (CERN), Geneva (Switzerland). TH-PH Division; UpHere, San Francisco, CA (United States)
  3. Wayne State Univ., Detroit, MI (United States). Dept. of Physics and Astronomy
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Theoretical Physics Group; Univ. of California, Berkeley, CA (United States). Berkeley Center for Theoretical Physics
Publication Date:
Grant/Contract Number:
AC02-05CH11231; PHYS-1066293
Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 93; Journal Issue: 7; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1430669