Light hidden mesons through the Z portal
Abstract
Confining hidden sectors are an attractive possibility for physics beyond the Standard Model (SM). They are especially motivated by neutral naturalness theories, which reconcile the lightness of the Higgs with the strong constraints on colored top partners. We study hidden QCD with one light quark flavor, coupled to the SM via effective operators suppressed by the mass M of new electroweak-charged particles. This effective field theory is inspired by a new tripled top model of supersymmetric neutral naturalness. The hidden sector is accessed primarily via the Z and Higgs portals, which also mediate the decays of the hidden mesons back to SM particles. We find that exotic Z decays at the LHC and future Z factories provide the strongest sensitivity to this scenario, and we outline a wide array of searches. For a larger hidden confinement scale Λ ~ O (10) GeV, the exotic Z decays dominantly produce final states with two hidden mesons. ATLAS and CMS can probe their prompt decays up to M ~ 3 TeV at the high luminosity phase, while a TeraZ factory would extend the reach up to M ~ 20 TeV through a combination of searches for prompt and displaced signals. For smaller Λmore »
- Authors:
-
[3];
- Univ. of California, Davis, CA (United States)
- Hong Kong Univ. of Science and Technology (Hong Kong)
- Technische Univ. Munchen, Garching (Germany)
- Publication Date:
- Research Org.:
- Univ. of California, Davis, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1595456
- Grant/Contract Number:
- SC0009999
- 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: 2019; Journal Issue: 11; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Beyond Standard Model; Effective Field Theories; Nonperturbative Effects
Citation Formats
Cheng, Hsin-Chia, Li, Lingfeng, Salvioni, Ennio, and Verhaaren, Christopher B. Light hidden mesons through the Z portal. United States: N. p., 2019.
Web. doi:10.1007/JHEP11(2019)031.
Cheng, Hsin-Chia, Li, Lingfeng, Salvioni, Ennio, & Verhaaren, Christopher B. Light hidden mesons through the Z portal. United States. https://doi.org/10.1007/JHEP11(2019)031
Cheng, Hsin-Chia, Li, Lingfeng, Salvioni, Ennio, and Verhaaren, Christopher B. Wed .
"Light hidden mesons through the Z portal". United States. https://doi.org/10.1007/JHEP11(2019)031. https://www.osti.gov/servlets/purl/1595456.
@article{osti_1595456,
title = {Light hidden mesons through the Z portal},
author = {Cheng, Hsin-Chia and Li, Lingfeng and Salvioni, Ennio and Verhaaren, Christopher B.},
abstractNote = {Confining hidden sectors are an attractive possibility for physics beyond the Standard Model (SM). They are especially motivated by neutral naturalness theories, which reconcile the lightness of the Higgs with the strong constraints on colored top partners. We study hidden QCD with one light quark flavor, coupled to the SM via effective operators suppressed by the mass M of new electroweak-charged particles. This effective field theory is inspired by a new tripled top model of supersymmetric neutral naturalness. The hidden sector is accessed primarily via the Z and Higgs portals, which also mediate the decays of the hidden mesons back to SM particles. We find that exotic Z decays at the LHC and future Z factories provide the strongest sensitivity to this scenario, and we outline a wide array of searches. For a larger hidden confinement scale Λ ~ O (10) GeV, the exotic Z decays dominantly produce final states with two hidden mesons. ATLAS and CMS can probe their prompt decays up to M ~ 3 TeV at the high luminosity phase, while a TeraZ factory would extend the reach up to M ~ 20 TeV through a combination of searches for prompt and displaced signals. For smaller Λ ~ O (1) GeV, the Z decays to the hidden sector produce jets of hidden mesons, which are long-lived. LHCb will be a powerful probe of these emerging jets. Furthermore, the light hidden vector meson could be detected by proposed dark photon searches.},
doi = {10.1007/JHEP11(2019)031},
journal = {Journal of High Energy Physics (Online)},
number = 11,
volume = 2019,
place = {United States},
year = {Wed Nov 06 00:00:00 EST 2019},
month = {Wed Nov 06 00:00:00 EST 2019}
}
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