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Title: Uncovering light scalars with exotic Higgs decays to $$ b\overline{b}{\mu}^{+}{\mu}^{-} $$

Abstract

Here, the search for exotic Higgs decays are an essential probe of new physics. In particular, the small width of the Higgs boson makes its decay uniquely sensitive to the existence of light hidden sectors. Here we assess the potential of an exotic Higgs decay search for h → 2X → bb¯μ +μ to constrain theories with light CP-even (X = s) and CP-odd (X = a) singlet scalars in the mass range of 15 to 60 GeV. This decay channel arises naturally in many scenarios, such as the Standard Model augmented with a singlet, the two-Higgs-doublet model with a singlet (2HDM + S) — which includes the Next-to-Minimal Supersymmetric Standard Model (NMSSM) — and in hidden valley models. The 2b2μ channel may represent the best discovery avenue for many models. It has competitive reach, and is less reliant on low-p T b- and τ-reconstruction compared to other channels like 4b, 4τ, and 2τ2μ. We analyze the sensitivity of a 2b2μ search for the 8 and 14 TeV LHC, including the HL-LHC. We consider three types of analyses, employing conventional resolved b-jets with a clustering radius of R ~ 0.4, thin b-jets with R = 0.2, and jet substructuremore » techniques, respectively. The latter two analyses improve the reach for m X ~ 15 GeV, for which the two b-jets are boosted and often merged. We find that Br(h → 2X → 2b2μ) can be constrained at the few × 10–5 level across the entire considered mass range of X at the HL-LHC. This corresponds to a 1 – 10% reach in Br(h → 2X) in 2HDM + S models, including the NMSSM, depending on the type of Higgs Yukawa couplings.« less

Authors:
 [1];  [2];  [2]
  1. Univ. of Maryland, College Park, MD (United States). Maryland Center for Fundamental Physics
  2. Stony Brook Univ., Stony Brook, NY (United States). C.N. Yang Inst. for Theoretical Physics
Publication Date:
Research Org.:
Stony Brook Univ., Stony Brook, NY (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1452789
Grant/Contract Number:  
SC0008061
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2015; Journal Issue: 6; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Higgs Physics; Beyond Standard Model

Citation Formats

Curtin, David, Essig, Rouven, and Zhong, Yi -Ming. Uncovering light scalars with exotic Higgs decays to $ b\overline{b}{\mu}^{+}{\mu}^{-} $. United States: N. p., 2015. Web. doi:10.1007/JHEP06(2015)025.
Curtin, David, Essig, Rouven, & Zhong, Yi -Ming. Uncovering light scalars with exotic Higgs decays to $ b\overline{b}{\mu}^{+}{\mu}^{-} $. United States. doi:10.1007/JHEP06(2015)025.
Curtin, David, Essig, Rouven, and Zhong, Yi -Ming. Thu . "Uncovering light scalars with exotic Higgs decays to $ b\overline{b}{\mu}^{+}{\mu}^{-} $". United States. doi:10.1007/JHEP06(2015)025. https://www.osti.gov/servlets/purl/1452789.
@article{osti_1452789,
title = {Uncovering light scalars with exotic Higgs decays to $ b\overline{b}{\mu}^{+}{\mu}^{-} $},
author = {Curtin, David and Essig, Rouven and Zhong, Yi -Ming},
abstractNote = {Here, the search for exotic Higgs decays are an essential probe of new physics. In particular, the small width of the Higgs boson makes its decay uniquely sensitive to the existence of light hidden sectors. Here we assess the potential of an exotic Higgs decay search for h → 2X → bb¯μ+μ– to constrain theories with light CP-even (X = s) and CP-odd (X = a) singlet scalars in the mass range of 15 to 60 GeV. This decay channel arises naturally in many scenarios, such as the Standard Model augmented with a singlet, the two-Higgs-doublet model with a singlet (2HDM + S) — which includes the Next-to-Minimal Supersymmetric Standard Model (NMSSM) — and in hidden valley models. The 2b2μ channel may represent the best discovery avenue for many models. It has competitive reach, and is less reliant on low-p T b- and τ-reconstruction compared to other channels like 4b, 4τ, and 2τ2μ. We analyze the sensitivity of a 2b2μ search for the 8 and 14 TeV LHC, including the HL-LHC. We consider three types of analyses, employing conventional resolved b-jets with a clustering radius of R ~ 0.4, thin b-jets with R = 0.2, and jet substructure techniques, respectively. The latter two analyses improve the reach for m X ~ 15 GeV, for which the two b-jets are boosted and often merged. We find that Br(h → 2X → 2b2μ) can be constrained at the few × 10–5 level across the entire considered mass range of X at the HL-LHC. This corresponds to a 1 – 10% reach in Br(h → 2X) in 2HDM + S models, including the NMSSM, depending on the type of Higgs Yukawa couplings.},
doi = {10.1007/JHEP06(2015)025},
journal = {Journal of High Energy Physics (Online)},
number = 6,
volume = 2015,
place = {United States},
year = {2015},
month = {6}
}

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