R-axion detection at LHC

Goh, Hock-Seng; Ibe, Masahiro

doi:10.1088/1126-6708/2009/03/049

Cited by 29 publications

(33 citation statements)

References 75 publications

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“…Such couplings may also arise from contributions from the supersymmetry breaking sector. This leads to the possibility of producing the light states at the LHC, which subsequently decay into standard model fields through mixings with the Higgs fields [24]. The final states are most likely leptons, if recent cosmic ray data are explained as described above.…”

Section: Introductionmentioning

confidence: 99%

Cosmic signals from the hidden sector

2009

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Cosmologically long-lived, composite states arise as natural dark matter candidates in theories with a strongly interacting hidden sector at a scale of 10-100 TeV. Light axionlike states, with masses in the 1 MeV-10 GeV range, are also generic, and can decay via Higgs couplings to light standard model particles. Such a scenario is well motivated in the context of very low-energy supersymmetry breaking, where ubiquitous cosmological problems associated with the gravitino are avoided. We investigate the astrophysical and collider signatures of this scenario, assuming that dark matter decays into the axionlike states via dimension six operators, and we present an illustrative model exhibiting these features. We conclude that the recent data from PAMELA, FERMI, and H.E.S.S. points to this setup as a compelling paradigm for dark matter. This has important implications for future diffuse gamma ray measurements and collider searches.

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Section: Introductionmentioning

confidence: 99%

Cosmic signals from the hidden sector

2009

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“…This is in the region of the parameter space studied in Ref. [44], and the R-axion detection may be possible by searching displaced vertices in the decay of an R-axion to two muons.…”

Section: Mass Spectrum and Lhc Signaturementioning

confidence: 95%

“…An R-axion may be observed at the LHC [44]. The hidden sector model has an approxiate continuous R symmetry with charge assignment S : 8 3 , Q,Q : − 1 3 , P,P : 1.…”

Section: Mass Spectrum and Lhc Signaturementioning

confidence: 99%

A conformal gauge mediation and dark matter with only one mass parameter

Yanagida

Yonekura

2010

Physics Letters B

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If the supersymmetry (SUSY) is a solution to the hierarchy problem, it is puzzling that any SUSY particle has not been discovered yet. We show that there is a low-scale conformal gauge mediation model which contains all necessary ingredients, i.e. not only a SUSY-breaking dynamics and a gauge mediation mechanism, but also a candidate for the dark matter. The model has only one free parameter, that is, the mass for messengers. In this model, the dark matter is provided by a composite particle in the SUSY-breaking sector, and the observed value of the dark matter density uniquely fixes the mass of messengers at the order of 10 2 TeV. Then, the sfermion and gaugino masses are fixed to be of order 10 2 ∼ 10 3 GeV without any arbitrariness, thus the SUSY particles are expected not to be discovered at the Tevatron or LEP, while having a discovery possibility at the LHC.

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“…With the gluino mass range suggested by the Z+jets+E miss T , it is also possible to search for the R-axion which can be produced via gluon-fusion at the LHC experiment [107]. 20 The scalar partner of the axion could cause some cosmological problem in the gauge mediation scenario, although we do not go into details in this paper.…”

Section: Acknowledgmentsmentioning

confidence: 99%

Revisiting R-invariant direct gauge mediation

Chiang

Harigaya

Ibe

et al. 2016

J. High Energ. Phys.

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Abstract:We revisit a special model of gauge mediated supersymmetry breaking, the "R-invariant direct gauge mediation." We pay particular attention to whether the model is consistent with the minimal model of the µ-term, i.e., a simple mass term of the Higgs doublets in the superpotential. Although the incompatibility is highlighted in view of the current experimental constraints on the superparticle masses and the observed Higgs boson mass, the minimal µ-term can be consistent with the R-invariant gauge mediation model via a careful choice of model parameters. We derive an upper limit on the gluino mass from the observed Higgs boson mass. We also discuss whether the model can explain the 3σ excess of the Z+jets+E miss T events reported by the ATLAS collaboration.

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R-axion detection at LHC

Cited by 29 publications

References 75 publications

Cosmic signals from the hidden sector

Cosmic signals from the hidden sector

A conformal gauge mediation and dark matter with only one mass parameter

Revisiting R-invariant direct gauge mediation

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