2013Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fieldsOpen access

Post-LHC8 supersymmetry benchmark points for ILC physics

Howard Baer, Jenny List

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Abstract

We reevaluate prospects for supersymmetry (SUSY) at the proposed International Linear ${e}^{+}{e}^{\ensuremath{-}}$ Collider (ILC) in light of the first two years of serious data taking at LHC: LHC7 with $\ensuremath{\sim}5\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of $pp$ collisions at $\sqrt{s}=7\text{ }\text{ }\mathrm{TeV}$ and LHC8 with $\ensuremath{\sim}20\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ at $\sqrt{s}=8\text{ }\text{ }\mathrm{TeV}$. Strong new limits from LHC8 SUSY searches, along with the discovery of a Higgs boson with ${m}_{h}\ensuremath{\simeq}125\text{ }\text{ }\mathrm{GeV}$, suggest a paradigm shift from previously popular models to ones with new and compelling signatures. After a review of the current status of supersymmetry, we present a variety of new ILC benchmark models, including natural SUSY, radiatively driven natural SUSY, NUHM2 with low ${m}_{A}$, a focus point case from mSUGRA/CMSSM, nonuniversal gaugino mass model, $\stackrel{\texttildelow{}}{\ensuremath{\tau}}$ coannihilation, Kallosh-Linde/spread SUSY model, mixed gauge-gravity mediation, normal scalar mass hierarchy, and one example with the recently discovered Higgs boson being the heavy $CP$-even state $H$. While all these models at present elude the latest LHC8 limits, they do offer intriguing case study possibilities for ILC operating at $\sqrt{s}\ensuremath{\simeq}0.25--1\text{ }\text{ }\mathrm{TeV}$. The benchmark points also present a view of the widely diverse SUSY phenomena which might still be expected in the post-LHC8 era at both LHC and ILC.

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We reevaluate prospects for supersymmetry (SUSY) at the proposed International Linear ${e}^{+}{e}^{\ensuremath{-}}$ Collider (ILC) in light of the first two years of serious data taking at LHC: LHC7 with $\ensuremath{\sim}5\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of $pp$ collisions at $\sqrt{s}=7\text{ }\text{ }\mathrm{TeV}$ and LHC8 with $\ensuremath{\sim}20\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ at $\sqrt{s}=8\text{ }\text{ }\mathrm{TeV}$. Strong new limits from LHC8 SUSY searches, along with the discovery of a Higgs boson with ${m}_{h}\ensuremath{\simeq}125\text{ }\text{ }\mathrm{GeV}$, suggest a paradigm shift from previously popular models to ones with new and compelling signatures. After a review of the current status of supersymmetry, we present a variety of new ILC benchmark models, including natural SUSY, radiatively driven natural SUSY, NUHM2 with low ${m}_{A}$, a focus point case from mSUGRA/CMSSM, nonuniversal gaugino mass model, $\stackrel{\texttildelow{}}{\ensuremath{\tau}}$ coannihilation, Kallosh-Linde/spread SUSY model, mixed gauge-gravity mediation, normal scalar mass hierarchy, and one example with the recently discovered Higgs boson being the heavy $CP$-even state $H$. While all these models at present elude the latest LHC8 limits, they do offer intriguing case study possibilities for ILC operating at $\sqrt{s}\ensuremath{\simeq}0.25--1\text{ }\text{ }\mathrm{TeV}$. The benchmark points also present a view of the widely diverse SUSY phenomena which might still be expected in the post-LHC8 era at both LHC and ILC.

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Available abstract

We reevaluate prospects for supersymmetry (SUSY) at the proposed International Linear ${e}^{+}{e}^{\ensuremath{-}}$ Collider (ILC) in light of the first two years of serious data taking at LHC: LHC7 with $\ensuremath{\sim}5\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of $pp$ collisions at $\sqrt{s}=7\text{ }\text{ }\mathrm{TeV}$ and LHC8 with $\ensuremath{\sim}20\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ at $\sqrt{s}=8\text{ }\text{ }\mathrm{TeV}$. Strong new limits from LHC8 SUSY searches, along with the discovery of a Higgs boson with ${m}_{h}\ensuremath{\simeq}125\text{ }\text{ }\mathrm{GeV}$, suggest a paradigm shift from previously popular models to ones with new and compelling signatures. After a review of the current status of supersymmetry, we present a variety of new ILC benchmark models, including natural SUSY, radiatively driven natural SUSY, NUHM2 with low ${m}_{A}$, a focus point case from mSUGRA/CMSSM, nonuniversal gaugino mass model, $\stackrel{\texttildelow{}}{\ensuremath{\tau}}$ coannihilation, Kallosh-Linde/spread SUSY model, mixed gauge-gravity mediation, normal scalar mass hierarchy, and one example with the recently discovered Higgs boson being the heavy $CP$-even state $H$. While all these models at present elude the latest LHC8 limits, they do offer intriguing case study possibilities for ILC operating at $\sqrt{s}\ensuremath{\simeq}0.25--1\text{ }\text{ }\mathrm{TeV}$. The benchmark points also present a view of the widely diverse SUSY phenomena which might still be expected in the post-LHC8 era at both LHC and ILC.

Key concepts: Physics, Particle physics, Supersymmetry, Gaugino, Higgs boson, Chargino, Physics beyond the Standard Model, Large Hadron Collider

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