Charged Higgs mass bound from the b→sγb \to s \gamma process in the minimal supergravity

The constraint on the mass of the charged Higgs boson from the recent measurement of the inclusive $b \rightarrow s \gamma$ decay is studied in a framework of the minimal supergravity. It is shown that the lower bound for the charged Higgs mass crucially depends on the sign of the higgsino mass parameter ($\mu$). For $\mu<0$, the bound exceeds 400 GeV when the ratio of two Higgs vacuum expectation values ($\tan\beta$) is larger than 10. No strong bound is obtained for $\mu>0$ due to cancellations between charged Higgs and supersymmetric particle contributions.Comment: Talk given by Toru Goto at Yukawa International Seminar '95: From the Standard Model to Grand Unified Theories, Kyoto, Japan, 21-25 Aug 1995; 10 pages LaTeX with ptptex.sty; 5 figures are included with epsf.st

Lepton electric dipole moments in supersymmetric type II seesaw model

AbstractWe study the lepton electric dipole moments in the framework of the supersymmetric type II seesaw model where the exchange of heavy SU(2)W triplets generates small neutrino masses. We show that the CP violating phase of the bilinear soft supersymmetry breaking term associated with the SU(2)W triplets contributes to lepton electric dipole moments mainly through threshold corrections to the gaugino masses at the seesaw scale. As a consequence, the ratio of the electric dipole moments of the muon and the electron is the same as the ratio of their masses in a wide region of parameter space

Rotating string in doubled geometry with generalized isometries

In this paper, we first construct a globally well-defined non-geometric background which contains several branes in type II string theory compactified on a 7-torus. One of these branes is called 5^2_2, which is a codimension-2 object and has a non-trivial monodromy given by a T-duality transformation. The geometry near the 5^2_2-brane is shown to approach the non-geometric background constructed in arXiv:1004.2521. We then construct the solution of a fundamental string rotating along a non-trivial cycle in the 5^2_2 background. Although the background is not axisymmetric in the usual sense, we show that it is actually axisymmetric as a doubled geometry by explicitly finding a generalized Killing vector. We perform a generalized coordinate transformation into a system where the generalized isometry is manifest, and show that the winding and momentum charges of the string solution is explicitly conserved in that system.Comment: 32 pages, 5 figures; v2: typos corrected, to appear in Physical Review D; v3 minor errors fixed, improvements and a reference added to section 4.