We consider a left-right symmetric SU(4)c×SU(2)L×SU(2)R (4-2-2) model with gravity mediated supersymmetry breaking. We find that with 4-2-2 compatible non-universal gaugino masses, t−b−τ Yukawa coupling unification is consistent with neutralino dark matter abundance and with constraints from collider experiments (except (g − 2)μ). The gluino mass lies close to that of the lightest neutralino, s...

In the minimal supersymmetric Standard Model with seesaw neutrino masses we show how R–parity can emerge naturally as a discrete gauge symmetry. The same discrete symmetry explains the smallness of the μ–term (the Higgsino mass parameter) via the Giudice–Masiero mechanism. The discrete gauge anomalies are cancelled by a discrete version of the Green–Schwarz mechanism. The simplest symmetry grou...

We explore the sparticle and Higgs spectroscopy of an SU(5) inspired extension of the constrained minimal supersymmetric standard model (CMSSM). The universal soft parameter m0 is replaced by m5̄ and m10, where m5̄ and m10 denote universal soft scalar masses associated with fields in the five and ten dimensional representations of SU(5). The special case m5̄ ≪ m10 yields a rather characteristic sp...

The possibility of velocity shear-induced linear transformations of different magnetohydrodynamic waves in the solar wind is studied both analytically and numerically. A quantitative analysis of the wave transformation processes for all possible plasma-β regimes is performed. By applying the obtained criteria for effective wave coupling to the solar wind parameters, we show that velocity sheari...

We show that the Standard Model Lagrangian, including small neutrino masses, has an anomaly-free discrete Z6 symmetry. This symmetry can emerge naturally from (I3 R + Li + Lj − 2Lk) gauge symmetry (Li is the ith lepton number) and ensure the stability of the nucleon even when the threshold of new physics Λ is low. All ∆B = 1 and ∆B = 2 (B is the baryon number) effective operators are forbidden ...

INTRODUCTION Local military conflicts continue in many areas of the world. These conflicts produce multiple casualties to military personnel and civilians. This paper describes one aspect of the medical care required for victims of the civil conflict in the Republic of Georgia. METHODS Interviews with patients and their accompanying persons and abstraction of medical records. RESULTS Data w...

In supersymmetric theories with extra dimensions, the Higgs and matter fields can be part of the gauge multiplet, so that the Yukawa interactions can arise from the gauge interactions. This leads to the possibility of gauge–Yukawa coupling unification, gi = yf , in the effective four dimensional theory after the initial gauge symmetry and the supersymmetry are broken upon orbifold compactificat...

I. Kiguradze,1 N. Partsvania,1 and B. Půža2 1 Andrea Razmadze Mathematical Institute, 1 Aleksidze Street, 0193 Tbilisi, Georgia 2Department of Mathematics and Statistics, Masaryk University, Janáčkovo nám. 2a, 66295 Brno, Czech Republic Correspondence should be addressed to I. Kiguradze, [email protected] Received 8 September 2007; Accepted 23 January 2008 Recommended by Donal O’Regan For higher...

We describe a supersymmetric Grand Unified Theory based on the gauge group SU(5), or SO(10), invariant under the interchange of any SU(5), or SO(10), with each family multiplet transforming non trivially under one different individual group factor. A realistic pattern of fermion masses and mixings is obtained as a result of an appropriate choice out of the many possible discretely degenerate va...

Natural History Museum of Crete, University of Crete, Knossos Av., Gr-71409, Irakleio, Crete, Greece Yale Institute for Biospheric Studies, Yale University, 21 Sachem St., New Haven, CT-06520, USA Department of Genetics and Molecular Biotechnology, Hellenic Centre for Marine Research, Thalassocosmos, Gournes Pediados, GR-71003 Irakleio, Crete, Greece WWF Greece-Dadia project, Dadia – Soufli, Gr...