If the gµ − 2 constraint is imposed, the mode of the mh distribution is quite stable, being ∼ 117 GeV for all the studied values of mt. The favoured ranges of mh vary with mt, the two peaks being more clearly separated for mt = 178 GeV and merging for mt = 172.7 GeV. On the other hand, values of mh> 119 GeV may correspond to much larger values of m1/2 and A0, lying in rapid-annihilation funnels. Values of mh < 119 GeV correspond to small values of the gaugino mass m1/2 and the soft trilinear supersymmetry-breaking parameter A0, lying along coannihilation strips, and most of the allowed parameter sets are consistent with a supersymmetric interpretation of the possibly discrepancy in gµ − 2. We observe two distinct peaks in the distribution of mh values, corresponding to two different regions of the CMSSM parameter space. For mt = 174.3 GeV, we find that 114 GeV < mh < 127 GeV and a peak in the tanβ distribution ≃ 55. 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. We also find that the expansion parameter associated with the slepton sector needs to be smaller than the corresponding parameter in the down-squark sector in order to be compliant with the bound imposed Flavour symmetries (FS), -, are typically constructed using experimental data from fermion masses and mixings, however in these theories there is no general principle which
We find that only when the expansion parameter in the down-squark sector is relatively large there is a noticeable effect, which tends to relax the lower limit from b → s γ on the universal gaugino mass. We determine the effect of the departure from MFV on the branching ratio of b → s γ.
BOSON X DARK X BOSON FREE
We apply constraints from fermion masses and CKM matrix elements to limit the range of the new free parameters of the model. These are run down together with MSSM parameters to the electroweak scale. Second and third generation off-diagonal elements in the Yukawa, sfermion, and trilinear mass matrices are taken to be non-zero at the GUT scale. We consider the effects of departures from minimal flavour violations (MFV) in the context of CMSSM-like theories. In addition to a reduction in the maximum cross section, the upper limit on the neutralino mass is greatly reduced when tachyons are avoided, particularly for smaller values of the squark masses. The allowed areas in the cross sectionmass plane for both spin-independent and spin-dependent scattering are significantly smaller than would be allowed if the MSSM were required to be valid only around the weak scale. We display explicitly the allowed ranges of effective squark and slepton masses at the weak scale, and the cross-section ranges allowed if the MSSM is to remain valid without tachyons up to 10 TeV or the GUT scale. Specifically, squarks are generally much heavier than sleptons if no tachyons are to appear before the GUT scale ∼ 1016 GeV, or even before 10 TeV.
The requirement that the MSSM remain an acceptable effective field theory up to energies beyond the weak scale constrains the sparticle spectrum, and hence the permissible ranges of cold dark matter neutralino-proton cross sections.
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