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Title: Searching for confining hidden valleys at LHCb, ATLAS, and CMS

Abstract

We explore strategies for probing hidden valley scenarios exhibiting confinement. Such scenarios lead to a moderate multiplicity of light hidden hadrons for generic showering and hadronization similar to QCD. Their decays are typically soft and displaced, making them challenging to probe with traditional LHC searches. We show that the low trigger requirements and excellent track and vertex reconstruction at LHCb provide a favorable environment to search for such signals. We propose novel search strategies in both muonic and hadronic channels. We also study existing ATLAS and CMS searches and compare them with our proposals at LHCb. We find that the reach at LHCb is generically better in the parameter space we consider here, even with optimistic background estimations for ATLAS and CMS searches. We discuss potential modifications at ATLAS and CMS that might make these experiments competitive with the LHCb reach. Our proposed searches can be applied to general hidden valley models as well as exotic Higgs boson decays, such as in twin Higgs models.

Authors:
; ; ;
Publication Date:
Research Org.:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1439123
Alternate Identifier(s):
OSTI ID: 1501517
Grant/Contract Number:  
SC0007859
Resource Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Name: Physical Review D Journal Volume: 97 Journal Issue: 9; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Pierce, Aaron, Shakya, Bibhushan, Tsai, Yuhsin, and Zhao, Yue. Searching for confining hidden valleys at LHCb, ATLAS, and CMS. United States: N. p., 2018. Web. doi:10.1103/PhysRevD.97.095033.
Pierce, Aaron, Shakya, Bibhushan, Tsai, Yuhsin, & Zhao, Yue. Searching for confining hidden valleys at LHCb, ATLAS, and CMS. United States. doi:10.1103/PhysRevD.97.095033.
Pierce, Aaron, Shakya, Bibhushan, Tsai, Yuhsin, and Zhao, Yue. Fri . "Searching for confining hidden valleys at LHCb, ATLAS, and CMS". United States. doi:10.1103/PhysRevD.97.095033.
@article{osti_1439123,
title = {Searching for confining hidden valleys at LHCb, ATLAS, and CMS},
author = {Pierce, Aaron and Shakya, Bibhushan and Tsai, Yuhsin and Zhao, Yue},
abstractNote = {We explore strategies for probing hidden valley scenarios exhibiting confinement. Such scenarios lead to a moderate multiplicity of light hidden hadrons for generic showering and hadronization similar to QCD. Their decays are typically soft and displaced, making them challenging to probe with traditional LHC searches. We show that the low trigger requirements and excellent track and vertex reconstruction at LHCb provide a favorable environment to search for such signals. We propose novel search strategies in both muonic and hadronic channels. We also study existing ATLAS and CMS searches and compare them with our proposals at LHCb. We find that the reach at LHCb is generically better in the parameter space we consider here, even with optimistic background estimations for ATLAS and CMS searches. We discuss potential modifications at ATLAS and CMS that might make these experiments competitive with the LHCb reach. Our proposed searches can be applied to general hidden valley models as well as exotic Higgs boson decays, such as in twin Higgs models.},
doi = {10.1103/PhysRevD.97.095033},
journal = {Physical Review D},
number = 9,
volume = 97,
place = {United States},
year = {2018},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevD.97.095033

Citation Metrics:
Cited by: 5 works
Citation information provided by
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Figures / Tables:

FIG. 1. FIG. 1. : Left: Zp cross section reach. Green line: cross section for a photonlike coupling, suppressed by ϵ = 0.02. Right: Projected upper bounds on BR(h → twin bottom quarks) using the one DV search. This process produces $\hat{ω}$=$\hat{η}$ followed by $\hat{ω}$ → μ+μ. Horizontal green line: prediction inmore » a variation of the fraternal TH model; ωv is a mixture of $c'$ and $s'$. Green curve: reach for the corresponding decay topology. The width of the bands correspond to 10 ≤ $\langle$Nv$\rangle$ ≤ 30.« less

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