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Title: Pair production of heavy MSSM charged and neutral Higgs bosons in multi-TeV e{sup +}e{sup -} collisions at the Compact Linear Collider

Abstract

In the theoretical framework of the minimal supersymmetric extension of the standard model (MSSM), we study the pair production of heavy charged and neutral Higgs bosons in e{sup +}e{sup -} collisions with a center-of-mass energy of 3 TeV, at the Compact Linear Collider (CLIC). The high-energy beam-beam effects at the interaction point are taken into account in our simulations. With an integrated luminosity of 3000 fb{sup -1}, the hadronic cascade decays of H{sup +}H{sup -} and A{sup 0}H{sup 0} pairs can be observed over a wide range of Higgs boson masses, extending beyond 1 TeV. The Higgs mass parameter m{sub A} can be derived from a {chi}{sup 2}-analysis, and the corresponding statistical error was found to be smaller than 1%. In addition, by comparing the signal rates of different decay channels, one can determine the ratio between the vacuum expectation values tan{beta} with a good accuracy in the intermediate region, i.e. when tan{beta} lies between 6 and 11 typically.

Authors:
;  [1]
  1. Uppsala University, box 535, 75121 Uppsala (Sweden)
Publication Date:
OSTI Identifier:
20933253
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevD.75.015004; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACCURACY; BEAM LUMINOSITY; BEAM-BEAM INTERACTIONS; ELECTRON-POSITRON COLLISIONS; ERRORS; HADRONS; HIGGS BOSONS; HIGGS MODEL; LINEAR COLLIDERS; MASS; PAIR PRODUCTION; PARTICLE DECAY; SIGNALS; SIMULATION; STANDARD MODEL; SUPERSYMMETRY; TEV RANGE 01-10

Citation Formats

Coniavitis, Elias, and Ferrari, Arnaud. Pair production of heavy MSSM charged and neutral Higgs bosons in multi-TeV e{sup +}e{sup -} collisions at the Compact Linear Collider. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.015004.
Coniavitis, Elias, & Ferrari, Arnaud. Pair production of heavy MSSM charged and neutral Higgs bosons in multi-TeV e{sup +}e{sup -} collisions at the Compact Linear Collider. United States. doi:10.1103/PHYSREVD.75.015004.
Coniavitis, Elias, and Ferrari, Arnaud. Mon . "Pair production of heavy MSSM charged and neutral Higgs bosons in multi-TeV e{sup +}e{sup -} collisions at the Compact Linear Collider". United States. doi:10.1103/PHYSREVD.75.015004.
@article{osti_20933253,
title = {Pair production of heavy MSSM charged and neutral Higgs bosons in multi-TeV e{sup +}e{sup -} collisions at the Compact Linear Collider},
author = {Coniavitis, Elias and Ferrari, Arnaud},
abstractNote = {In the theoretical framework of the minimal supersymmetric extension of the standard model (MSSM), we study the pair production of heavy charged and neutral Higgs bosons in e{sup +}e{sup -} collisions with a center-of-mass energy of 3 TeV, at the Compact Linear Collider (CLIC). The high-energy beam-beam effects at the interaction point are taken into account in our simulations. With an integrated luminosity of 3000 fb{sup -1}, the hadronic cascade decays of H{sup +}H{sup -} and A{sup 0}H{sup 0} pairs can be observed over a wide range of Higgs boson masses, extending beyond 1 TeV. The Higgs mass parameter m{sub A} can be derived from a {chi}{sup 2}-analysis, and the corresponding statistical error was found to be smaller than 1%. In addition, by comparing the signal rates of different decay channels, one can determine the ratio between the vacuum expectation values tan{beta} with a good accuracy in the intermediate region, i.e. when tan{beta} lies between 6 and 11 typically.},
doi = {10.1103/PHYSREVD.75.015004},
journal = {Physical Review. D, Particles Fields},
number = 1,
volume = 75,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}
  • The production of single and doubly charged Higgs bosons associated with standard model gauge boson Z{sub L} in e{sup +}e{sup -} colliders is examined. The sensitivity of these processes on the littlest Higgs model parameters in the range of compatibility with electroweak precision observables is analyzed. The possibility of detecting lepton flavor violation processes is also discussed.
  • We consider the capability of the e{sup +}e{sup -} linear collider (which has recently been called the International Linear Collider, or ILC) for studying the properties of the heavy Higgs bosons in the supersymmetric standard model. We pay special attention to the large tan{beta} region which is motivated, in particular, by explaining the dark-matter density of the universe (i.e., so-called 'rapid-annihilation funnels'). We perform a systematic analysis to estimate expected uncertainties in the masses and widths of the heavy Higgs bosons assuming an energy and integrated luminosity of {radical}(s)=1 TeV and L=1 ab{sup -1}. We also discuss its implication tomore » the reconstruction of the dark-matter density of the universe.« less
  • We analyze the prospects for detecting the three neutral Higgs bosons of the Minimal Supersymmetric extension of the Standard Model in the intense-coupling regime at e{sup +}e{sup -} colliders. Due to the small mass differences between the Higgs states in this regime and their relative large total decay widths, the discrimination between the particles is challenging at the LHC and in some cases even impossible. We propose to use the missing mass technique in the Higgs-strahlung process in e{sup +}e{sup -} collisions to distinguish between the two CP-even Higgs eigenstates h and H, relying on their b{bar b} decay inmore » the b{bar b}{ell}{sup +}{ell}{sup -} event sample. Ah and AH associated production is then studied in the 4b-jet event sample to probe the CP-odd A boson. At collider energies {radical}s {approx_equal} 300 GeV and an integrated luminosity of 500 fb{sup -1}, accuracies in the mass measurement of the CP-even Higgs bosons are expected to range from 100 to 300 MeV, while for the CP-odd A boson, accuracies of less than 500 MeV can be obtained.« less
  • Our search for neutral Higgs bosons in the minimal supersymmetric extension of the standard model (MSSM) decaying to tau-lepton pairs in pp collisions is performed, using events recorded by the CMS experiment at the LHC. The dataset corresponds to an integrated luminosity of 24.6 fb -1, with 4.9 fb -1 at 7 TeV and 19.7 fb -1 at 8 TeV. To enhance the sensitivity to neutral MSSM Higgs bosons, the search includes the case where the Higgs boson is produced in association with a b-quark jet. No excess is observed in the tau-lepton-pair invariant mass spectrum. Exclusion limits are presentedmore » in the MSSM parameter space for different benchmark scenarios, m h max , m h mod + , m h mod - , light-stop, light-stau, τ-phobic, and low- m H. Lastly, upper limits on the cross section times branching fraction for gluon fusion and b-quark associated Higgs boson production are also given.« less