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Title: Search for Fermiophobic Higgs using the 3γ+X Final State in 1.96-TeV Proton-Antiproton Collisions

Abstract

We search for a fermiophobic Higgs boson using 3γ+X events in p$$\bar{p}$$ collisions at √ s = 1.96 TeV. In the Standard Model (SM), the Higgs boson is introduced to explain the electroweak symmetry breaking (EWSB) and the origin of fermion masses. The minimal extension of the SM contains an additional Higgs doublet, the “two Higgs doublet model” (2HDM). In this model a fermiophobic Higgs boson (hf) which signifies very suppressed or zero coupling to the fermions, may arise in a paticular version of the 2HDM called type I. The data were collected with the CDF-II detector at the Fermilab Tevatron collider and correspond to an integrated luminosity of 6.0 fb -1. We estimate the fake-photon backgrounds and Direct Triphoton Production(DTP) backgrounds. The expected number of signal events is 17.7 for the fermiophobic higgs of the mass 75 GeV/c 2 and H± of the mass 120 GeV/c 2. The expected number of backgrounds is 1.9±0.9, From these results, we obtain the expected limits on σ(p$$\bar{p}$$ → H±hf ) × Br(H± → W*hf ) × (Br(hf → γγ))2 of 8.0 fb for the fermiophobic Higgs of 75 GeV/c 2 and H± of the mass 120 GeV/c 2 at the 95% confidence level, while the observed limit is 10 fb.

Authors:
 [1]
  1. Osaka Univ. (Japan)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1329053
Report Number(s):
FERMILAB-THESIS-2012-64
1490095
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Thesis/Dissertation
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Hamaguchi, Atsunari. Search for Fermiophobic Higgs using the 3γ+X Final State in 1.96-TeV Proton-Antiproton Collisions. United States: N. p., 2012. Web. doi:10.2172/1329053.
Hamaguchi, Atsunari. Search for Fermiophobic Higgs using the 3γ+X Final State in 1.96-TeV Proton-Antiproton Collisions. United States. doi:10.2172/1329053.
Hamaguchi, Atsunari. Sun . "Search for Fermiophobic Higgs using the 3γ+X Final State in 1.96-TeV Proton-Antiproton Collisions". United States. doi:10.2172/1329053. https://www.osti.gov/servlets/purl/1329053.
@article{osti_1329053,
title = {Search for Fermiophobic Higgs using the 3γ+X Final State in 1.96-TeV Proton-Antiproton Collisions},
author = {Hamaguchi, Atsunari},
abstractNote = {We search for a fermiophobic Higgs boson using 3γ+X events in p$\bar{p}$ collisions at √ s = 1.96 TeV. In the Standard Model (SM), the Higgs boson is introduced to explain the electroweak symmetry breaking (EWSB) and the origin of fermion masses. The minimal extension of the SM contains an additional Higgs doublet, the “two Higgs doublet model” (2HDM). In this model a fermiophobic Higgs boson (hf) which signifies very suppressed or zero coupling to the fermions, may arise in a paticular version of the 2HDM called type I. The data were collected with the CDF-II detector at the Fermilab Tevatron collider and correspond to an integrated luminosity of 6.0 fb -1. We estimate the fake-photon backgrounds and Direct Triphoton Production(DTP) backgrounds. The expected number of signal events is 17.7 for the fermiophobic higgs of the mass 75 GeV/c2 and H± of the mass 120 GeV/c2. The expected number of backgrounds is 1.9±0.9, From these results, we obtain the expected limits on σ(p$\bar{p}$ → H±hf ) × Br(H± → W*hf ) × (Br(hf → γγ))2 of 8.0 fb for the fermiophobic Higgs of 75 GeV/c2 and H± of the mass 120 GeV/c2 at the 95% confidence level, while the observed limit is 10 fb.},
doi = {10.2172/1329053},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {1}
}

Thesis/Dissertation:
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