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

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

Publication Date:: 2018-05-25

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

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

OSTI Identifier:: 1439123

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

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

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; Extensions of Higgs sector; Extensions of gauge sector; Particle decays; Particle production

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.

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                    Pierce, Aaron, Shakya, Bibhushan, Tsai, Yuhsin, & Zhao, Yue. Searching for confining hidden valleys at LHCb, ATLAS, and CMS.  United States.  https://doi.org/10.1103/PhysRevD.97.095033

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                    Pierce, Aaron, Shakya, Bibhushan, Tsai, Yuhsin, and Zhao, Yue. Fri .  
"Searching for confining hidden valleys at LHCb, ATLAS, and CMS".  United States.  https://doi.org/10.1103/PhysRevD.97.095033.

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@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}

}

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Cited by: 38 works

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FIG. 1. : Left: Z_p 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 »

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

Abstract

Citation Formats

Figures / Tables:

Triggering soft bombs at the LHC journal, August 2017

Probing baryogenesis with displaced vertices at the LHC journal, February 2015

Search for Higgs-like bosons decaying into long-lived exotic particles journal, December 2016

Quark production rule in e + e − →two jets journal, October 1988

CMS hardware track trigger: New opportunities for long-lived particle searches at the HL-LHC journal, August 2017

Semivisible Jets: Dark Matter Undercover at the LHC journal, October 2015

A brief introduction to PYTHIA 8.1 journal, June 2008

Search for the rare decay $ K_{\mathrm{S}}^0\to {\mu^{+}}{\mu^{-}} $ journal, January 2013

Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at s = 8 TeV journal, January 2015

Echoes of a hidden valley at hadron colliders journal, August 2007

Performance of the CMS missing transverse momentum reconstruction in pp data at √ s = 8 TeV journal, February 2015

Exotic quarks in Twin Higgs models journal, March 2016

Search for long-lived, weakly interacting particles that decay to displaced hadronic jets in proton-proton collisions at s = 8 TeV with the ATLAS detector journal, July 2015

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Search for long-lived heavy charged particles using a ring imaging Cherenkov technique at LHCb journal, December 2015

An introduction to PYTHIA 8.2 journal, June 2015

Search for long-lived particles that decay into final states containing two electrons or two muons in proton-proton collisions at s = 8 TeV journal, March 2015

Search for dark matter produced with an energetic jet or a hadronically decaying W or Z boson at s = 13 $$ \sqrt{s}=13 $$ TeV journal, July 2017

Discovering the Higgs through highly-displaced vertices journal, March 2008

Natural Electroweak Breaking from a Mirror Symmetry journal, June 2006

Identification of beauty and charm quark jets at LHCb journal, June 2015

Search for massive, long-lived particles using multitrack displaced vertices or displaced lepton pairs in p p collisions at s = 8 TeV with the ATLAS detector journal, October 2015

Probability of color rearrangement at partonic level in hadronic W+W− decays journal, May 1997

Measurement of C P Violation in B 0 → D + D − Decays journal, December 2016

Two U(1)'s and ϵ charge shifts journal, January 1986

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Phenomenology of hidden valleys at hadron colliders journal, July 2008

LHC searches for dark sector showers journal, November 2017

Triggering soft bombs at the LHC
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Probing baryogenesis with displaced vertices at the LHC
journal, February 2015

Search for Higgs-like bosons decaying into long-lived exotic particles
journal, December 2016

Quark production rule in $e^{+}$ $e^{-}$ →two jets
journal, October 1988

CMS hardware track trigger: New opportunities for long-lived particle searches at the HL-LHC
journal, August 2017

Semivisible Jets: Dark Matter Undercover at the LHC
journal, October 2015

A brief introduction to PYTHIA 8.1
journal, June 2008

Search for the rare decay $ K_{\mathrm{S}}^0\to {\mu^{+}}{\mu^{-}} $
journal, January 2013

Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at $\sqrt{s} = 8 TeV$
journal, January 2015

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journal, August 2007

Performance of the CMS missing transverse momentum reconstruction in pp data at √ s = 8 TeV
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Search for long-lived, weakly interacting particles that decay to displaced hadronic jets in proton-proton collisions at $\sqrt{s} = 8 TeV$ with the ATLAS detector
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journal, June 2015

Search for long-lived particles that decay into final states containing two electrons or two muons in proton-proton collisions at $\sqrt{s} = 8 TeV$
journal, March 2015

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