A minimal supersymmetric scenario with only μ at the weak scale

Cheung, Kingman; Chiang, Cheng‐Wei; Song, Jeonghyeon

doi:10.1088/1126-6708/2006/04/047

Cited by 21 publications

(27 citation statements)

References 58 publications

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“…The null results for all the searches of SUSY particles have pushed the mass scale of squarks beyond a few TeV [1,2]. While abandoning SUSY as a solution to the gauge hierarchy problem, such a high-scale SUSY scenario also draws more and more attention on CP problems [3][4][5][6][7][8], cosmological problems [9][10][11], and DM search [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. On the other hand, the searches for the SUSY Higgs bosons provide the less stringent mass limits and it still seems possible to find them in the range of a few hundred GeV [27,28].…”

Section: Jhep04(2015)151mentioning

confidence: 99%

Dark matter in split SUSY with intermediate higgses

Cheung

Huo

Lee

et al. 2015

J. High Energ. Phys.

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Abstract:The searches for heavy Higgs bosons and supersymmetric (SUSY) particles at the LHC have left the minimal supersymmetric standard model (MSSM) with an unusual spectrum of SUSY particles, namely, all squarks are beyond a few TeV while the Higgs bosons other than the one observed at 125 GeV could be relatively light. In light of this, we study a scenario characterized by two scales: the SUSY breaking scale or the squark-mass scale (M S ) and the heavy Higgs-boson mass scale (M A ). We perform a survey of the MSSM parameter space with M S 10 10 GeV and M A 10 4 GeV such that the lightest Higgs boson mass is within the range of the observed Higgs boson as well as satisfying a number of constraints. The set of constraints include the invisible decay width of the Z boson and that of the Higgs boson, the chargino-mass limit, dark matter relic abundance from Planck, the spin-independent cross section of direct detection by LUX, and gamma-ray flux from dwarf spheroidal galaxies and gamma-ray line constraints measured by Fermi LAT. Survived regions of parameter space feature the dark matter with correct relic abundance, which is achieved through either coannihilation with charginos, A/H funnels, or both. We show that future measurements, e.g., XENON1T and LZ, of spin-independent cross sections can further squeeze the parameter space.

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Section: Jhep04(2015)151mentioning

confidence: 99%

Dark matter in split SUSY with intermediate higgses

Cheung

Huo

Lee

et al. 2015

J. High Energ. Phys.

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“…A discussion on tests of supersymmetry at linear colliders can be found in (Baer et al, 2004) and a detailed discussion of tests of CP asymmetries is given in (Moortgat-Pick et al, 2005). A number of works related to the effects of CP on the Higgs and sparticle phenomena discussed in this section are (Accomando et al, 2006;Akeroyd and Arhrib, 2001;Alan et al, 2007;Bartl et al, 2006Bartl et al, , 2004aBoz, 2002;Cheung et al, 2006;Choi et al, 2004b;Ghosh et al, 2005;Heinemeyer et al, 2004;Hollik et al, 1999Hollik et al, , 1998). An interesting issue concerns the possibility of expressing CP odd quantities in terms of basis independent quantities for the supersymmetric case similar to the Jarlskog invariant for the case of the Standard Model.…”

Section: T and Cp Odd Operators And Their Observability At Collidersmentioning

confidence: 99%

CPviolation from the standard model to strings

2008

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A review of CP violation from the Standard Model to strings is given which includes a broad landscape of particle physics models, encompassing the non-supersymmetric 4D extensions of the standard model, and models based on supersymmetry, on extra dimensions, on strings and on branes. The supersymmetric models discussed include complex mSUGRA and its extensions, while the models based on extra dimensions include 5D models including models based on warped geometry. CP violation beyond the standard model is central to achieving the desired amount of baryon asymmetry in the universe via baryogenesis and leptogenesis. They also affect a variety of particle physics phenomena: electric dipole moments, g − 2, relic density and detection rates for neutralino dark matter in supersymmetric theories, Yukawa unification in grand unified and string based models, and sparticle production cross sections, and their decays patterns and signatures at hadron colliders. Additionally CP violations can generate CP even-CP odd Higgs mixings, affect the neutral Higgs spectrum and lead to phenomena detectable at colliders. Prominent among these are the CP violation effects in decays of neutral and charged Higgs bosons. Neutrino masses introduce new sources of CP violation which may be explored in neutrino factories in the future. Such phases can also enter in proton stability in unified models of particle interactions. The current experimental status of CP violation is discussed and possibilities for the future outlined.

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“…photon flux from the neutralino pair annihilationχ 0χ0 → γγ [18] has been estimated to be about 1.5 × 10 −14 (2 × 10 −13 ) cm −2 s −1 if the neutralino is a Higgsino-LSP (Wino-LSP), using the same moderate value of J = 100 [19,20].…”

Section: Jhep03(2007)120mentioning

confidence: 99%

Hidden fermion as milli-charged dark matter in StueckelbergZ′ model

Cheung

Yuan

2007

J. High Energy Phys.

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134

113

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We augment the hidden Stueckelberg Z ′ model by a pair of Dirac fermions in the hidden sector, in which the Z ′ has a coupling strength comparable to weak scale coupling. We show that this hidden fermion-antifermion pair could be a milli-charged dark matter candidate with a viable relic density. Existing terrestrial and astrophysical searches on milli-charged particles do not place severe constraints on this hidden fermion. We calculate the flux of monochromatic photons coming from the Galactic center due to pair annihilation of these milli-charged particles and show that it is within reach of the next generation γ-ray experiments. The characteristic signature of this theoretical endeavor is that the Stueckelberg Z ′ boson has a large invisible width decaying into the hidden fermion-antifermion pair. We show that existing Drell-Yan data do not constrain this model yet. Various channels of singly production of this Z ′ boson at the LHC and ILC are explored.

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A minimal supersymmetric scenario with only μ at the weak scale

Cited by 21 publications

References 58 publications

Dark matter in split SUSY with intermediate higgses

Dark matter in split SUSY with intermediate higgses

CPviolation from the standard model to strings

Hidden fermion as milli-charged dark matter in StueckelbergZ′ model

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