9102072
Bilarge neutrino mixing from supersymmetry breaking: The Role of high-scale parameters
We show how a bilarge neutrino mixing pattern can arise in a broken supersymmetric theory, in such a way that the difference with quark mixing is explained. Our basic assumption is that this difference is due to nonrenormalizable interactions involving hidden sector fields. Such interactions lend lepton number violating mass terms to both the right-handed neutrino and sneutrino fields. A superpotential containing an array of gauge singlet chiral superfields, together with a combination of seesaw and radiative contributions lead us to a neutrino mass matrix which, for some natural parametric choices, can have the structure needed for bilarge mixing. Allowed ranges of parameters in the gauge singlet sector are delineated, corresponding to each of the cases of normal hierarchy, inverted hierarchy and degenerate neutrinos. PACS indices: 12.60.Jv, 14.60.Lm, 14.60.Pq, 14.60.St Electronic address: biswarup@mri.ernet.in Electronic address: probir@theory.tifr.res.in Electronic address: srikanth@mri.ernet.in
125018064
Supersymmetry working group report, 'From strings to LHC' workshop, Goa, (January, 2007)
122353884
Parton description of the forward peak in single particle electroproduction with highly virtual photons
The parton mode or the reaction eN→eAB (N = nucleon, A, B = hadrons) in the fixed ω Bj limit is used to discuss the width of the corresponding forward peak as a function of the photon mass.
121584805
Current-commutators and high energy hadron production in e+e− annihilation
Abstract We consider the asymptotic behavior of the structure-functions for the process e + e − → H + everything (where H is a detectable hadron) in terms of commutators involving the electromagnetic current.
31086876
Stringent low-energy mass constraints in no-scale supergravity.
Spectacular mass constraints are shown to exist at low energies in minimal no-scale supergravity theories. The top quark cannot be too light, the lowest-lying Higgs particle cannot be too heavy, and the pseudoscalar Higgs boson must weigh nearly a quarter as much as the gluino.
119370491
Oblique corrections and the quadratic approximation in electroweak precision testing
This paper is withdrawn. A revised and expanded version of this work is available as hep-ph/9603323.
121472335
Supersymmetry at high density
121012368
On supersymmetry breaking in a strong magnetic field
Using Schwinger's proper time formalism, the author constructs the one-loop effective potential for a supersymmetric non-Abelian gauge theory in a background constant magnetic field and study supersymmetry breaking in the strong-field approximation. The problem of symmetry restoration in non-supersymmetric gauge theory is also discussed.
120591896
A note on supersymmetry and magnetic fields
ConclusionIn the present article we have considered two supersymmetric non-abelian gauge theories in the presence of an external magnetic field. In has been shown that the effect of the magnetic field breaks suppersymmetry at the one-loop level; however, if supersymmetry is already broken spontaneously at the tree level, then the magnetic field effect does not restore it at the one-loop level. These facts could be used in SUSY GUT models (which are used to describe the early universe), to study phase transition in those models.
122089562
SUPERSYMMETRIC APPROACH TO QUASINORMAL MODES
Supersymmetry (SUSY) in quantum mechanics is extended from square integrable states to those satisfying the outgoing wave boundary condition. Using this formalism we obtain new exactly solvable potentials admitting quasinormal modes (QNM) solutions of the Klein–Gordon equation.
121043298
On the construction of supersymmetric quantum mechanical Hamiltonian
Starting from an arbitrary supersymmetric quantum mechanical Hamilonian (SSQM) (with unbroken spersymmetry) we construct a sequence of SSQM Hamiltonians, each one having the same energy spectrum as the original one with different eigenvectors. The alogorithm developed here is verified for a transcendental type superpotential.