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Sneutrino NLSP Scenarios in the NUHM with Gravitino Dark Matter
/ Ellis, John R. (CERN) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Santoso, Yudi (Durham U., IPPP)
We analyze scenarios in which some flavour of sneutrino is the next-to-lightest supersymmetric particle (NLSP), assuming that the gravitino is the lightest supersymmetric particle (LSP) and provides the cold dark matter. Such scenarios do not arise in the constrained supersymmetric extension of the Standard Model (CMSSM) with universal gaugino and scalar masses input at the GUT scale. [...]
arXiv:0807.3736; CERN-PH-TH-2008-159; UMN-TH-2708-08; FTPI-MINN-08-28; IPPP-08-53; DCPT-08-106; CERN-PH-TH-2008-159; DCPT-08-106; FTPI-MINN-08-28; IPPP-08-53; UMN-TH-2708-08.-
Geneva : CERN, 2008 - 29 p.
- Published in : JHEP 10 (2008) 005
Fulltext: arXiv:0807.3736 - PDF; JHEP10(2008)005 - PDF; SISSA/IOP Open Access article: PDF; External link: Preprint
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On the Feasibility of a Stop NLSP in Gravitino Dark Matter Scenarios
/ Diaz-Cruz, J.L. (Colima U. ; Puebla U., Mexico) ; Ellis, John R. (CERN) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Santoso, Yudi (Victoria U.)
We analyze the possibility that the lighter stop {\tilde t_1} could be the next-to-lightest supersymmetric particle (NLSP) in models where the gravitino is the lightest supersymmetric particle (LSP). We do not find any possibility for a stop NLSP in the constrained MSSM with universal input soft supersymmetry-breaking masses at the GUT scale (CMSSM), but do find small allowed regions in models with non-universal Higgs masses (NUHM). [...]
hep-ph/0701229; CERN-PH-TH-2007-003; UMN-TH-2536-07; FTPI-MINN-07-03; CERN-PH-TH-2007-003; FTPI-MINN-2007-03; UMN-TH-2536.-
Geneva : CERN, 2007 - 31 p.
- Published in : JHEP 05 (2007) 003
Access to fulltext document: PDF; Fulltext: PDF; SISSA/IOP Open Access article: PDF; External link: Preprint
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Flavor- and CP-violating physics from new supersymmetric thresholds
/ Pospelov, M (Perimeter Institute for Theoretical Physics, Waterloo, Ontario and Univ. of Victoria, Canada) ; Ritz, A (Univ. of Victoria, Canada ; CERN) ; Santoso, Y (Perimeter Institute for Theoretical Physics, Waterloo, Ontario and Univ. of Victoria, Canada)
Geneva : CERN, 2006
- Published in : Phys. Rev. Lett. 96 (2006) 091801
APS Published version, local copy: PDF;
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On $B_{s} \to \mu^{+} \mu^{-}$ and Cold Dark Matter Scattering in the MSSM with Non-Universal Higgs Masses
/ Ellis, John R. (CERN) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Santoso, Yudi (Victoria U.) ; Spanos, Vassilis C. (Minnesota U., Theor. Phys. Inst.)
We show that present experimental constraints on B_s -> mu+ mu- decay and the CDMS upper limit on the cold dark matter elastic scattering cross section already have significant impact on the parameter space of the minimal supersymmetric extension of the Standard Model (MSSM) with non-universal supersymmetry-breaking scalar masses for the Higgs multiplets (NUHM). The relaxation of scalar universality in the MSSM allows the possibility of a relatively light mass M_A for the pseudoscalar Higgs boson. [...]
hep-ph/0603136; CERN-PH-TH-2006-037; UMN-TH-2434-06; FTPI-MINN-06-06; CERN-PH-TH-2006-037; FTPI-MINN-2006-06; UMN-TH-2434.-
Geneva : CERN, 2006 - 18 p.
- Published in : JHEP 05 (2006) 063
Access to fulltext document: PDF; Fulltext: PDF; SISSA/IOP Published version, local copy: PDF; External link: Preprint
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Flavor and CP violating physics from new supersymmetric thresholds
/ Pospelov, M (Perimeter Inst. Theor. Phys. ; Victoria U.) ; Ritz, A (Victoria U. ; CERN) ; Santoso, Y (Perimeter Inst. Theor. Phys. ; Victoria U.)
Treating the MSSM as an effective theory, we study the implications of having dimension five operators in the superpotential for flavor and CP-violating processes, exploiting the linear decoupling of observable effects with respect to the new threshold scale \Lambda. We show that the assumption of weak scale supersymmetry, when combined with the stringent limits on electric dipole moments and lepton flavor-violating processes, provides sensitivity to \Lambda as high as 10^7-10^9 GeV, while the next generation of experiments could directly probe the high-energy scales suggested by neutrino physics..
hep-ph/0510254; CERN-PH-TH-2005-203.-
Geneva : CERN, 2006 - 4 p.
- Published in : Phys. Rev. Lett. 96 (2006) 091801
APS Published version, local copy: PDF; Access to fulltext document: PDF; External link: hep-ph/0510254 PDF
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On the Higgs Mass in the CMSSM
/ Ellis, John R. (CERN) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Santoso, Yudi (Victoria U. ; Perimeter Inst. Theor. Phys.)
We estimate the mass of the lightest neutral Higgs boson h in the minimal supersymmetric extension of the Standard Model with universal soft supersymmetry-breaking masses (CMSSM), subject to the available accelerator and astrophysical constraints. For m_t = 174.3 GeV, we find that 114 GeV < m_h < 127 GeV and a peak in the tan beta distribution simeq 55. [...]
hep-ph/0509331; CERN-PH-TH-2005-173; UMN-TH-2416-05; FTPI-MINN-05-43; ACT-09-05; MIFP-05-23; ACT-2005-09; CERN-PH-TH-2005-173; FTPI-MINN-2005-43; UMN-TH-2416.-
Houston, TX : Houston Univ. Adv. Res. Cent. The Woodlands, 2006 - 14 p.
- Published in : Phys. Lett. B 633 (2006) 583-590
Access to fulltext document: PDF; Fulltext: PDF; External link: Preprint
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CP-odd Phase Correlations and Electric Dipole Moments
/ Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Pospelov, Maxim (Guelph U. ; Perimeter Inst. Theor. Phys. ; Victoria U.) ; Ritz, Adam (CERN) ; Santoso, Yudi (Guelph U. ; Perimeter Inst. Theor. Phys.)
We revisit the constraints imposed by electric dipole moments (EDMs) of nucleons and heavy atoms on new CP-violating sources within supersymmetric theories. We point out that certain two-loop renormalization group corrections induce significant mixing between the basis-invariant CP-odd phases. [...]
hep-ph/0506106; UMN-TH-2401-05; FTPI-MINN-05-13; CERN-PH-TH-2005-095; CERN-PH-TH-2005-095; FTPI-MINN-2005-13; UMN-TH-2401.-
Minneapolis, MN : Minnesota Univ., 2005 - 31 p.
- Published in : Phys. Rev. D 72 (2005) 075001
APS Published version, local copy: PDF; Access to fulltext document: PDF; Fulltext: PDF; External link: Preprint
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Prospects for Sparticle Discovery in Variants of the MSSM
/ Ellis, Jonathan Richard (CERN) ; Olive, Keith A ; Santoso, Y ; Spanos, V C
We discuss the prospects for detecting supersymmetric particles in variants of the minimal supersymmetric extension of the Standard Model (MSSM), in light of laboratory and cosmological constraints. We first assume that the lightest supersymmetric particle (LSP) is the lightest neutralino chi, and present scatter plots of the masses of the two lightest visible supersymmetric particles when the input scalar and gaugino masses are constrained to be universal (CMSSM), when the input Higgs scalar masses are non-universal (NUHM), and when the squark and slepton masses are also non-universal and the MSSM is regarded as a low-energy effective field theory valid up to the GUT scale (LEEST) or just up to 10 TeV (LEEST10). [...]
hep-ph/0408118; CERN-PH-TH-2004-131; UMN-TH-2315; FTPI-MINN-2004-27.-
Geneva : CERN, 2004 - 19 p.
- Published in : Phys. Lett. B 603 (2004) 51
Access to fulltext document: PDF; External link: hep-ph/0408118 PDF
- CERN library copies
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