DYNAMICAL GENERATION OF THE EFFECTIVE POTENTIAL IN SUPERSTRING THEORY

1992 ◽  
Vol 07 (12) ◽  
pp. 1031-1038
Author(s):  
L. CLAVELLI ◽  
B. HARMS ◽  
Y. LEBLANC
Keyword(s):  
Supersymmetry Breaking ◽  
Effective Potential ◽  
Tree Level ◽  
Type Ii ◽  
Contact Interactions ◽  
Superstring Theory ◽  
Dynamical Generation ◽  
Self Consistent

We obtain the effective potential of the type-II superstring with broken supersymmetry due to twisted toroidal compactification of one of the string coordinates. Supersymmetry breaking of this type is shown to yield non-vanishing contact interactions among the massless modes at genus-1 order, thus dynamically providing the theory with a nontrivial effective potential. We argue that, if for a general compactification scheme the sum of this potential and tree level contributions has a minimum(zero total tadpole), this would provide us with a self-consistent criterion for selecting true string vacua.

scholarly journals ON THE EFFECTIVE POTENTIAL OF THE $Dp -\overline{Dp}$ SYSTEM IN TYPE II THEORIES

1999 ◽  
Vol 14 (23) ◽  
pp. 1545-1563 ◽  
Author(s):  
I. PESANDO
Keyword(s):  
String Theory ◽  
Effective Potential ◽  
Tree Level ◽  
Type Ii

We compute the effective potential of a system composed of a Dp-brane and a separated [Formula: see text]-brane at tree level in string theory. We show explicitly that the tachyon condenses and that the scalars which describe transverse fluctuations acquire a vev proportional to the distance.

scholarly journals D-TERM DYNAMICAL SUPERSYMMETRY BREAKING GENERATING SPLIT ${\mathcal N} = 2$ GAUGINO MASSES OF MIXED MAJORANA–DIRAC TYPE

2012 ◽  
Vol 27 (26) ◽  
pp. 1250159 ◽  
Author(s):  
H. ITOYAMA ◽  
NOBUHITO MARU
Keyword(s):  
Gauge Theory ◽  
Supersymmetry Breaking ◽  
Explicit Form ◽  
Tree Level ◽  
Leading Order ◽  
Gap Equation ◽  
Four Dimensions ◽  
Hartree Fock ◽  
Self Consistent ◽  
Chiral Superfields

Under a few mild assumptions, [Formula: see text] supersymmetry (SUSY) in four dimensions is shown to be spontaneously broken in a metastable vacuum in a self-consistent Hartree–Fock approximation of Bardeen–Cooper–Schrieffer/Nambu–Jona-Lasinio (BCS/NJL) type to the leading order, in the gauge theory specified by the gauge kinetic function and the superpotential of adjoint chiral superfields, in particular, that possess [Formula: see text] extended SUSY spontaneously broken to [Formula: see text] at tree level. We derive an explicit form of the gap equation, showing the existence of a nontrivial solution. The [Formula: see text] gauginos in the observable sector receive mixed Majorana–Dirac masses and are split due to both the nonvanishing 〈D0〉 and 〈F0〉 induced with 〈D0〉. It is argued that proper physical applications and assessment of the range of the validity of our framework are made possible by rendering the approximation into [Formula: see text] expansion.

Contact interactions in superstring theory

1988 ◽  
Vol 299 (3) ◽  
pp. 559-586 ◽  
Author(s):  
Michael B. Green ◽  
Nathan Seiberg
Keyword(s):  
Contact Interactions ◽  
Superstring Theory

NEUTRINO MASSES AND TeV SCALE RESONANT LEPTOGENESIS FROM SUPERSYMMETRY BREAKING

2006 ◽  
Vol 21 (21) ◽  
pp. 1629-1646 ◽  
Author(s):  
STEPHEN M. WEST
Keyword(s):  
Supersymmetry Breaking ◽  
Mass Matrix ◽  
Mass Splitting ◽  
Light Neutrino ◽  
Tree Level ◽  
Neutrino Masses ◽  
Yukawa Couplings ◽  
Neutrino Sector ◽  
The One ◽  
The Right

We review a class of supersymmetric models in which the light neutrino masses result from higher-dimensional supersymmetry-breaking terms in the MSSM super- and Kähler-potentials. The mechanism used in these models is closely related to the Giudice–Masiero mechanism for the MSSM μ parameter and leads to TeV-scale right-handed neutrino and sneutrino states. In these models, the dominant contribution to the light neutrino (Majorana) mass matrix is a one-loop term with a sub-dominant tree-level "seesaw" contribution. It is also shown that it is possible to construct a natural model of TeV-scale leptogenesis via the resonant behavior of the one-loop self-energy contribution to the right-handed neutrino (Ni) decay. This model addresses the primary problems of previous phenomenological studies of low-energy leptogenesis: a rational for TeV-scale right-handed neutrinos with small Yukawa couplings; the origin of the tiny, but non-zero mass splitting required between at least two Ni masses; and the necessary non-trivial breaking of flavor symmetries in the right-handed neutrino sector.

scholarly journals Supersymmetry breaking by type II seesaw assisted anomaly mediation

2008 ◽  
Vol 77 (11) ◽  
Author(s):  
R. N. Mohapatra ◽  
Nobuchika Okada ◽  
Hai-Bo Yu
Keyword(s):  
Supersymmetry Breaking ◽  
Type Ii ◽  
Anomaly Mediation

The effective potential and supersymmetry breaking in superstring models

1987 ◽  
Vol 192 (3-4) ◽  
pp. 377-384 ◽  
Author(s):  
Pierre Binétruy ◽  
Sally Dawson ◽  
Ian Hinchliffe ◽  
Mary K. Gaillard
Keyword(s):  
Supersymmetry Breaking ◽  
Effective Potential

DISPERSION RELATIONS APPROACH FOR HEAVY HIGGS

1987 ◽  
Vol 02 (04) ◽  
pp. 1075-1083 ◽  
Author(s):  
A.P. Contogouris ◽  
N. Mebarki ◽  
D. Atwood
Keyword(s):  
Strong Interaction ◽  
Higgs Mass ◽  
Bound State ◽  
Interaction Effects ◽  
Dispersion Relations ◽  
Tree Level ◽  
Gauge Bosons ◽  
Self Consistent ◽  
Consistent Solution

The system of interacting Higgs and longitudinal gauge bosons, when the Higgs mass MH varies above 1 TeV, is studied using dispersion relations (N/D method). Models satisfying unitarity and analyticity constraints are constructed and solved exactly. For MH≲0.6 TeV the dispersive and perturbative (tree level) amplitudes are similar. For MH≳1.5 TeV , however, they much differ in structure. For MH≃1.5, in ZZ→ZZ the dispersive amplitudes exceed the perturbative ones by factors 2~4. There are indications of strong interaction effects: In HH→HH there is an ℓ=0 bound state, which can be taken as the Higgs itself; in fact, for MH≃2.5 there is an almost self-consistent solution with respect to the mass, and very roughly with respect to the coupling. There is also some indication of a resonance in ZZ→ZZ, as well as in HH→HH.

CONSTRUCTING THE SUPERSTRING SPACE-TIME SUSY ALGEBRA IN THE LIGHT-CONE GAUGE

1988 ◽  
Vol 03 (12) ◽  
pp. 2855-2893 ◽  
Author(s):  
A. RESTUCCIA ◽  
J.G. TAYLOR
Keyword(s):  
Light Cone ◽  
Explicit Construction ◽  
Space Time ◽  
Substantial Part ◽  
Type I ◽  
Type Ii ◽  
Contact Interactions ◽  
Regularization Scheme ◽  
Light Cone Gauge

Closure of the [10] SUSY algebra is attempted for heterotic and type II superstrings by explicit construction of the quartic supersymmetry and Hamiltonian generators. These are shown to possess only contact interactions. Other related nonlinearly realized generators are also constructed at the quartic level, and a substantial part of the [10]-SUSY algebra shown to close with only these generators, for any regularization scheme for the heterotic, and by using phase integration for the type II. Type I superstrings are also considered.

Sign in / Sign up

Export Citation Format

Share Document