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Title: Supersymmetric Exotic Decays of the 125 GeV Higgs Boson

Abstract

We reveal a set of novel decay topologies for the 125 GeV Higgs boson in supersymmetry which are initiated by its decay into a pair of neutralinos, and discuss their collider search strategies. This category of exotic Higgs decays are characterized by the collider signature: visible objects + $$\mbox{$${\not\! E}_{\rm T}$$}$$, with $$\mbox{$${\not\! E}_{\rm T}$$}$$ dominantly arising from escaping dark matter particles. Their benchmark arises naturally in the Peccei-Quinn symmetry limit of the MSSM singlet-extensions, which is typified by the co-existence of three light particles: singlet-like scalar $$h_1$$ and pseudoscalar $$a_1$$, and singlino-like neutralino $$\chi_1$$, all with masses of $$\lesssim 10$$ GeV, and the generically suppression of the exotic decays of the 125 GeV Higgs boson $$h_2\to h_1 h_1$$, $$a_1a_1$$ and $$\chi_1\chi_1$$, however. As an illustration, we study the decay topology: $$h_2 \to \chi_1 \chi_2$$, where the bino-like $$\chi_2$$ decays to $$h_1 \chi_1$$ or $$a_1 \chi_1$$, and $$h_1/a_1 \to f\bar f$$, with $$f\bar f = \mu^+\mu^-$$, $$b\bar b$$. In the di-muon case ($$m_{h_1/a_1} \sim 1$$ GeV), a statistical sensitivity of $$\frac{S}{\sqrt{B}} > 6 \sigma$$ can be achieved easily at the 8 TeV LHC, assuming $$\frac{\sigma(pp \rightarrow W h_2)}{\sigma(pp \rightarrow W h_{\rm SM})} {\rm Br}(h_2 \to \mu^+\mu^- \chi_1 \chi_1)=0.1$$. In themore » $$b\bar b$$ case ($$m_{h_1/a_1} \sim 45$$ GeV), 600 fb$$^{-1}$$ data at the 14 TeV LHC can lead to a statistical sensitivity of $$\frac{S}{\sqrt{B}} > 5 \sigma$$, assuming $$\frac{\sigma(pp \rightarrow Z h_2)}{\sigma(pp \rightarrow Z h_{\rm SM})} {\rm Br}(h_2 \to b\bar b \chi_1 \chi_1)=0.5$$. These exotic decays open a new avenue for exploring new physics couplings with the 125 GeV Higgs boson at colliders.« less

Authors:
 [1];  [2];  [3];  [4]
  1. Los Alamos
  2. Hong Kong U. Sci. Tech.
  3. Chicago U., KICP
  4. Fermilab
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1332198
Report Number(s):
FERMILAB-PUB-13-186-T; LA-UR-13-24173; arXiv:1309.6633
Journal ID: ISSN 0031-9007; 1255652
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 112; Journal Issue: 22; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Huang, Jinrui, Liu, Tao, Wang, Lian-Tao, and Yu, Felix. Supersymmetric Exotic Decays of the 125 GeV Higgs Boson. United States: N. p., 2014. Web. doi:10.1103/PhysRevLett.112.221803.
Huang, Jinrui, Liu, Tao, Wang, Lian-Tao, & Yu, Felix. Supersymmetric Exotic Decays of the 125 GeV Higgs Boson. United States. https://doi.org/10.1103/PhysRevLett.112.221803
Huang, Jinrui, Liu, Tao, Wang, Lian-Tao, and Yu, Felix. Wed . "Supersymmetric Exotic Decays of the 125 GeV Higgs Boson". United States. https://doi.org/10.1103/PhysRevLett.112.221803. https://www.osti.gov/servlets/purl/1332198.
@article{osti_1332198,
title = {Supersymmetric Exotic Decays of the 125 GeV Higgs Boson},
author = {Huang, Jinrui and Liu, Tao and Wang, Lian-Tao and Yu, Felix},
abstractNote = {We reveal a set of novel decay topologies for the 125 GeV Higgs boson in supersymmetry which are initiated by its decay into a pair of neutralinos, and discuss their collider search strategies. This category of exotic Higgs decays are characterized by the collider signature: visible objects + $\mbox{${\not\! E}_{\rm T}$}$, with $\mbox{${\not\! E}_{\rm T}$}$ dominantly arising from escaping dark matter particles. Their benchmark arises naturally in the Peccei-Quinn symmetry limit of the MSSM singlet-extensions, which is typified by the co-existence of three light particles: singlet-like scalar $h_1$ and pseudoscalar $a_1$, and singlino-like neutralino $\chi_1$, all with masses of $\lesssim 10$ GeV, and the generically suppression of the exotic decays of the 125 GeV Higgs boson $h_2\to h_1 h_1$, $a_1a_1$ and $\chi_1\chi_1$, however. As an illustration, we study the decay topology: $h_2 \to \chi_1 \chi_2$, where the bino-like $\chi_2$ decays to $h_1 \chi_1$ or $a_1 \chi_1$, and $h_1/a_1 \to f\bar f$, with $f\bar f = \mu^+\mu^-$, $b\bar b$. In the di-muon case ($m_{h_1/a_1} \sim 1$ GeV), a statistical sensitivity of $\frac{S}{\sqrt{B}} > 6 \sigma$ can be achieved easily at the 8 TeV LHC, assuming $\frac{\sigma(pp \rightarrow W h_2)}{\sigma(pp \rightarrow W h_{\rm SM})} {\rm Br}(h_2 \to \mu^+\mu^- \chi_1 \chi_1)=0.1$. In the $b\bar b$ case ($m_{h_1/a_1} \sim 45$ GeV), 600 fb$^{-1}$ data at the 14 TeV LHC can lead to a statistical sensitivity of $\frac{S}{\sqrt{B}} > 5 \sigma$, assuming $\frac{\sigma(pp \rightarrow Z h_2)}{\sigma(pp \rightarrow Z h_{\rm SM})} {\rm Br}(h_2 \to b\bar b \chi_1 \chi_1)=0.5$. These exotic decays open a new avenue for exploring new physics couplings with the 125 GeV Higgs boson at colliders.},
doi = {10.1103/PhysRevLett.112.221803},
url = {https://www.osti.gov/biblio/1332198}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 22,
volume = 112,
place = {United States},
year = {2014},
month = {6}
}