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

Pierce, Aaron; Shakya, Bibhushan; Tsai, Yuhsin; Zhao, Yue

doi:10.1103/physrevd.97.095033

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

Journal Article · 25 May 2018 · Physical Review D

DOI: https://doi.org/10.1103/physrevd.97.095033 · OSTI ID:1439123

Pierce, Aaron ^[1]; Shakya, Bibhushan ^[2]; Tsai, Yuhsin ^[3]; Zhao, Yue ^[4]

Univ. of Michigan, Ann Arbor, MI (United States). Leinweber Center for Theoretical Physics
Univ. of Cincinnati, OH (United States). Dept of Physics; Univ. of Michigan, Ann Arbor, MI (United States). Leinweber Center for Theoretical Physics
Univ. of Maryland, College Park, MD (United States). Maryland Center for Fundamental Physics, Dept. of Physics
Shanghai Jiao Tong Univ. (China). Tsung-Dao Lee Inst., and Dept. of Physics and Astronomy; Univ. of Michigan, Ann Arbor, MI (United States). Leinweber Center for Theoretical Physics

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.

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Research Organization:: Univ. of Michigan, Ann Arbor, MI (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)

Grant/Contract Number:: SC0007859; PHY1066293; NSF-PHY-1620074

OSTI ID:: 1439123

Alternate ID(s):: OSTI ID: 1501517; OSTI ID: 1646662

Journal Information:: Physical Review D, Vol. 97, Issue 9; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 41 works

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