skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Heavy Higgs searches and constraints on two Higgs doublet models

Authors:
;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL)
Sponsoring Org.:
USDOE SC OFFICE OF HIGH ENERGY PHYSICS
OSTI Identifier:
1121206
Report Number(s):
BNL-102451-2013-JA
Journal ID: ISSN 1550--7998; KA2401012
DOE Contract Number:
DE-AC02-98CH10886
Resource Type:
Journal Article
Resource Relation:
Journal Name: PHYSICAL REVIEW D 88, 015018 (2013); Journal Volume: 88; Journal Issue: 1
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Higgs; doublet; boson

Citation Formats

Chen C. Y., and Dawson, S.. Heavy Higgs searches and constraints on two Higgs doublet models. United States: N. p., 2013. Web. doi:10.1103/PhysRevD.88.015018.
Chen C. Y., & Dawson, S.. Heavy Higgs searches and constraints on two Higgs doublet models. United States. doi:10.1103/PhysRevD.88.015018.
Chen C. Y., and Dawson, S.. Fri . "Heavy Higgs searches and constraints on two Higgs doublet models". United States. doi:10.1103/PhysRevD.88.015018.
@article{osti_1121206,
title = {Heavy Higgs searches and constraints on two Higgs doublet models},
author = {Chen C. Y. and Dawson, S.},
abstractNote = {},
doi = {10.1103/PhysRevD.88.015018},
journal = {PHYSICAL REVIEW D 88, 015018 (2013)},
number = 1,
volume = 88,
place = {United States},
year = {Fri Jul 12 00:00:00 EDT 2013},
month = {Fri Jul 12 00:00:00 EDT 2013}
}
  • Cited by 66
  • Searches are presented for heavy scalar (H) and pseudoscalar (A) Higgs bosons posited in the two doublet model (2HDM) extensions of the standard model (SM). These searches are based on a data sample of pp collisions collected with the CMS experiment at the LHC at a center-of-mass energy of √s=8 TeV and corresponding to an integrated luminosity of 19.5 fb -1. The decays H→hh and A→Zh, where h denotes an SM-like Higgs boson, lead to events with three or more isolated charged leptons or with a photon pair accompanied by one or more isolated leptons. Our search results are presentedmore » in terms of the H and A production cross sections times branching fractions and are further interpreted in terms of 2HDM parameters. We place 95% C.L. cross section upper limits of approximately 7 pb on σB for H→hh and 2 pb for A→Zh. Furthermore, the results of a search for the rare decay of the top quark are presented; this results in a charm quark and an SM Higgs boson,t→ch, the existence of which would indicate a nonzero flavor-changing Yukawa coupling of the top quark to the Higgs boson. We place a 95% C.L. upper limit of 0.56% on B(t→ch).« less
    Cited by 19
  • Searches are presented for heavy scalar (H) and pseudoscalar (A) Higgs bosons posited in the two doublet model (2HDM) extensions of the standard model (SM). These searches are based on a data sample of pp collisions collected with the CMS experiment at the LHC at a center-of-mass energy of √s=8 TeV and corresponding to an integrated luminosity of 19.5 fb -1. The decays H→hh and A→Zh, where h denotes an SM-like Higgs boson, lead to events with three or more isolated charged leptons or with a photon pair accompanied by one or more isolated leptons. Our search results are presentedmore » in terms of the H and A production cross sections times branching fractions and are further interpreted in terms of 2HDM parameters. We place 95% C.L. cross section upper limits of approximately 7 pb on σB for H→hh and 2 pb for A→Zh. Furthermore, the results of a search for the rare decay of the top quark are presented; this results in a charm quark and an SM Higgs boson,t→ch, the existence of which would indicate a nonzero flavor-changing Yukawa coupling of the top quark to the Higgs boson. We place a 95% C.L. upper limit of 0.56% on B(t→ch).« less
  • Two-Higgs-doublet models predict nonstandard physical effects through the interactions of charged Higgs scalars. We analyze the experimental measurements that bound these effects and quantify the resulting constraints on the charged-Higgs-boson mass and coupling parameter tan{beta}. We consider low-energy data relating to {ital B}{sub {ital d}}{sup 0}-{ital {bar B}}{sub {ital d}}{sup 0}, {ital D}{sup 0}-{ital {bar D}}{sup 0}, and {ital K}{sup 0}-{ital {bar K}}{sup 0} mixing, and high-energy measurements at {ital p{bar p}} colliders relating to searches for the top quark and events with large missing {ital E}{sub {ital T}}. Our analysis systematically takes account of theoretical uncertainties in bag factors,more » decay constants, and quark mixing matrix elements by Monte Carlo sampling. We combine our results to determine the regions in the charged-Higgs-boson parameter space that are consistent with present data. An important result is that the Collider Detector at Fermilab top-quark mass bound {ital m}{sub {ital t}}{gt}77 GeV can probably not be evaded by appealing to {ital t}{r arrow}{ital bH}{sup +} decays, since only a very small sliver of parameter space is consistent with {ital m}{sub {ital t}}{lt}77 GeV in this scenario. Consistency with either the CERN NA31 or Fermilab E731 {epsilon}{prime}/{epsilon} measurements is possible. The rare decays {ital B}{r arrow}{ital K}{sup *}{gamma}, {ital K}{sup +}{r arrow}{pi}{sup +}{nu}{bar {nu}}, and {ital K}{sub {ital L}}{r arrow}{mu}{mu} are also examined in these models within the context of our combined analysis.« less
  • We study constraints on type-II two-Higgs-doublet models at large tan {beta} from CERN LEP and SLD Z-pole data and from lepton universality violation in W decay. We perform a global fit and find that, in the context of Z decay, the LEP-SLD experimental values for lepton universality violation, R{sub b}, and A{sub b} all somewhat disfavor the model. Contributions from the neutral-Higgs sector can be used to constrain the scalar-pseudoscalar Higgs mass splittings. Contributions from the charged-Higgs sector allow us to constrain the charged-Higgs boson mass. For tan {beta}=100 we obtain the 1{sigma} classical (Bayesian) bounds of m{sub H{sup {+-}}}{>=}670more » GeV (370 GeV) and 1{>=}m{sub h{sup 0}}/m{sub A{sup 0}}|{sub {alpha}}{sub ={beta}}=m{sub H{sup 0}}/m{sub A{sup 0}}|{sub {alpha}}{sub =0}{>=}0.68 (0.64). The 2{sigma} bounds are weak. Currently, the Fermilab Tevatron experimental limits on lepton universality violation in W decay provide no significant constraint on the Higgs sector. (c) 2000 The American Physical Society.« less