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Title: Status of weak scale supersymmetry after LHC Run 2 and ton-scale noble liquid WIMP searches

Abstract

After completion of LHC Run 2, the ATLAS and CMS experiments had collected of order 139 fb–1 of data at √s = 13 TeV. While discovering a very Standard Model-like Higgs boson of mass mh ≃ 125 GeV, no solid signal for physics beyond the Standard Model has emerged so far at LHC. In addition, no WIMP signals have emerged so far at ton-scale noble liquid WIMP search experiments. For the case of weak scale supersymmetry (SUSY), which is touted as a simple and elegant solution to the gauge hierarchy problem and likely low energy limit of compactified string theory, LHC has found rather generally that gluinos are beyond about 2.2 TeV whilst top squark must lie beyond 1.1 TeV. These limits contradict older simplistic notions of naturalness that emerged in the 1980s–1990s, leading to the rather pessimistic view that SUSY is now excluded except for perhaps some remaining narrow corners of parameter space. Yet, this picture ignores several important developments in SUSY/string theory that emerged in the 21st century: 1. the emergence of the string theory landscape and its solution to the cosmological constant problem, 2. a more nuanced view of naturalness including the notion of “stringy naturalness”, 3.more » the emergence of anomaly-free discrete R-symmetries and their connection to R-parity, Peccei-Quinn symmetry, the SUSY μ problem and proton decay and 4. the importance of including a solution to the strong CP problem. Rather general considerations from the string theory landscape favor large values of soft terms, subject to the vacuum selection criteria that electroweak symmetry is properly broken (no charge and/or color breaking (CCB) minima) and the resulting magnitude of the weak scale is not too far from our measured value. Then stringy naturalness predicts a Higgs mass mh ~ 125 GeV whilst sparticle masses are typically lifted beyond present LHC bounds. Lastly, in light of these refinements in theory perspective confronted by LHC and dark matter search results, we review the most likely LHC, ILC and dark matter signatures that are expected to arise from weak scale SUSY as we understand it today.« less

Authors:
ORCiD logo [1];  [2];  [1];  [1];  [1]
  1. Univ. of Oklahoma, Norman, OK (United States)
  2. Univ. of Wisconsin, Madison, WI (United States)
Publication Date:
Research Org.:
Univ. of Oklahoma, Norman, OK (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
1777464
Report Number(s):
arXiv:2002.03013
Journal ID: ISSN 1951-6355; TRN: US2209464
Grant/Contract Number:  
SC0009956
Resource Type:
Accepted Manuscript
Journal Name:
European Physical Journal. Special Topics
Additional Journal Information:
Journal Volume: 229; Journal Issue: 21; Journal ID: ISSN 1951-6355
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; supersymmetry; dark matter; LHC; string phenomenology

Citation Formats

Baer, Howard, Barger, Vernon, Sengupta, Dibyashree, Salam, Shadman, and Sinha, Kuver. Status of weak scale supersymmetry after LHC Run 2 and ton-scale noble liquid WIMP searches. United States: N. p., 2020. Web. doi:10.1140/epjst/e2020-000020-x.
Baer, Howard, Barger, Vernon, Sengupta, Dibyashree, Salam, Shadman, & Sinha, Kuver. Status of weak scale supersymmetry after LHC Run 2 and ton-scale noble liquid WIMP searches. United States. https://doi.org/10.1140/epjst/e2020-000020-x
Baer, Howard, Barger, Vernon, Sengupta, Dibyashree, Salam, Shadman, and Sinha, Kuver. Mon . "Status of weak scale supersymmetry after LHC Run 2 and ton-scale noble liquid WIMP searches". United States. https://doi.org/10.1140/epjst/e2020-000020-x. https://www.osti.gov/servlets/purl/1777464.
@article{osti_1777464,
title = {Status of weak scale supersymmetry after LHC Run 2 and ton-scale noble liquid WIMP searches},
author = {Baer, Howard and Barger, Vernon and Sengupta, Dibyashree and Salam, Shadman and Sinha, Kuver},
abstractNote = {After completion of LHC Run 2, the ATLAS and CMS experiments had collected of order 139 fb–1 of data at √s = 13 TeV. While discovering a very Standard Model-like Higgs boson of mass mh ≃ 125 GeV, no solid signal for physics beyond the Standard Model has emerged so far at LHC. In addition, no WIMP signals have emerged so far at ton-scale noble liquid WIMP search experiments. For the case of weak scale supersymmetry (SUSY), which is touted as a simple and elegant solution to the gauge hierarchy problem and likely low energy limit of compactified string theory, LHC has found rather generally that gluinos are beyond about 2.2 TeV whilst top squark must lie beyond 1.1 TeV. These limits contradict older simplistic notions of naturalness that emerged in the 1980s–1990s, leading to the rather pessimistic view that SUSY is now excluded except for perhaps some remaining narrow corners of parameter space. Yet, this picture ignores several important developments in SUSY/string theory that emerged in the 21st century: 1. the emergence of the string theory landscape and its solution to the cosmological constant problem, 2. a more nuanced view of naturalness including the notion of “stringy naturalness”, 3. the emergence of anomaly-free discrete R-symmetries and their connection to R-parity, Peccei-Quinn symmetry, the SUSY μ problem and proton decay and 4. the importance of including a solution to the strong CP problem. Rather general considerations from the string theory landscape favor large values of soft terms, subject to the vacuum selection criteria that electroweak symmetry is properly broken (no charge and/or color breaking (CCB) minima) and the resulting magnitude of the weak scale is not too far from our measured value. Then stringy naturalness predicts a Higgs mass mh ~ 125 GeV whilst sparticle masses are typically lifted beyond present LHC bounds. Lastly, in light of these refinements in theory perspective confronted by LHC and dark matter search results, we review the most likely LHC, ILC and dark matter signatures that are expected to arise from weak scale SUSY as we understand it today.},
doi = {10.1140/epjst/e2020-000020-x},
journal = {European Physical Journal. Special Topics},
number = 21,
volume = 229,
place = {United States},
year = {Mon Dec 14 00:00:00 EST 2020},
month = {Mon Dec 14 00:00:00 EST 2020}
}

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  • DOI: 10.1007/JHEP07(2015)159

Non-universal soft scalar masses in supersymmetric theories
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The μ-problem and the strong CP-problem
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Detecting gluinos at hadron supercolliders
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Gluino reach and mass extraction at the LHC in radiatively-driven natural SUSY
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Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
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Electroweak baryogenesis and Higgs and stop searches at LEP and the Tevatron
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Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
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Out of this world supersymmetry breaking
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Supergravity gauge theories strike back: there is no crisis for SUSY but a new collider may be required for discovery
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Lepton flavor violation from SUSY with nonuniversal scalars
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Supersymmetric Standard Model from the heterotic string (II)
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Multiversality
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de Sitter vacua in string theory
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Leptogenesis as the Origin of Matter
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PICASSO, COUPP and PICO - search for dark matter with bubble chambers
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Dynamical breaking of supersymmetry
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Discrete R symmetries for the MSSM and its singlet extensions
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Gluino Decays to w and z Bosons at the ssc
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  • Baer, Howard; Barnett, R. Michael; Drees, Manuel
  • International Journal of Modern Physics A, Vol. 02, Issue 04
  • DOI: 10.1142/S0217751X87000521

Planck-scale physics and the Peccei-Quinn mechanism
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Phenomenology of gluino decays via loops and top-quark Yukawa coupling
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Hunting quasidegenerate Higgsinos
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Reach of the high-energy LHC for gluinos and top squarks in SUSY models with light Higgsinos
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Dark Matter Search Results from a One Ton-Year Exposure of XENON1T
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Anthropic Considerations in Multiple-Domain Theories and the Scale of Electroweak Symmetry Breaking
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Is it easy to save the gravitino?
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Compactified String Theories — Generic Predictions for Particle Physics
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  • Acharya, Bobby Samir; Kane, Gordon; Kumar, Piyush
  • International Journal of Modern Physics A, Vol. 27, Issue 12
  • DOI: 10.1142/S0217751X12300128

Landscape solution to the SUSY flavor and C P problems
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A review of WIMP baryogenesis mechanisms
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Radiative Natural Supersymmetry with a 125 GeV Higgs Boson
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Planck-scale corrections to axion models
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The low-energy supersymmetric spectrum according to N = 1 supergravity guts
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Mini-Split
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  • Arvanitaki, Asimina; Craig, Nathaniel; Dimopoulos, Savas
  • Journal of High Energy Physics, Vol. 2013, Issue 2
  • DOI: 10.1007/JHEP02(2013)126

Counting Flux Vacua
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The μ problem and B and L conservation with a discrete gauged R symmetry
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Naturalness versus stringy naturalness with implications for collider and dark matter searches
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Discrete gauge symmetry in continuum theories
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The MSSM parameter space with non-universal Higgs masses
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Heterotic mini-landscape (II): Completing the search for MSSM vacua in a <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msub><mml:mi mathvariant="double-struck">Z</mml:mi><mml:mn>6</mml:mn></mml:msub></mml:math> orbifold
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