2.4k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- European Organization for Nuclear ResearchCH1.3k papers
- National and Kapodistrian University of AthensGR1.3k papers
- National Institute of Chemical Physics and BiophysicsEE1.3k papers
- University of CyprusCY1.3k papers
- Universidad Autónoma de MadridES1.3k papers
- California Institute of TechnologyUS1.3k papers
- Charles UniversityCZ1.3k papers
- Cornell UniversityUS1.3k papers
- Tata Institute of Fundamental ResearchIN1.2k papers
- National Central UniversityTW1.2k papers
- University of BristolGB1.2k papers
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26 papers · 1 filter
A mass hierarchy from recoiling D branes
G. K. Leontaris, N. E. Mavromatos
Using conformal field theory methods we construct a metric that describes the distortion of space-time surrounding a D(irichlet)-brane (solitonic) defect after being struck by anot…
The kpc-scale radio source population
Pedro Augusto, J. Ignacio Gonzalez-Serrano, Alastair C. Edge +3
We are conducting a multi-wavelength (radio, optical, and X-ray) observational campaign to classify, morphologically and physically, a sample of 55 flat-spectrum radio sources domi…
Density profiles and collective excitations of a trapped two component Fermi vapour
M. Amoruso, I. Meccoli, A. Minguzzi +1
We discuss the ground state and the small-amplitude excitations of a degenerate vapour of fermionic atoms placed in two hyperfine states inside a spherical harmonic trap. An equati…
Testing minimum energy with powerful radio sources in clusters of galaxies
J. P. Leahy, Nectaria A. B. Gizani
We analyze ROSAT data for cluster gas surrounding powerful radio galaxies, which is well fitted by a ``beta-model'' gas distribution, after allowing for a compact central source. T…
Neutrino Oscillations and R-parity Violating Supersymmetry
O. Haug, J. D. Vergados, Amand Faessler +1
Using the neutrino oscillations and neutrinoless double beta decay experimental data we reconstructed an upper limit for the three generation neutrino mass matrix. We compared this…
New fermion mass textures from anomalous U(1) symmetries with baryon and lepton number conservation
G. K. Leontaris, J. Rizos
In this paper, we present solutions to the fermion mass hierarchy problem in the context of the minimal supersymmetric standard theory augmented by an anomalous family-dependent U(…
Critical Quantum Chaos in 2D Disordered Systems with Spin-Orbit Coupling
G. N. Katomeris, S. N. Evangelou
We examine the validity of the recently proposed semi-Poisson level spacing distribution function P(S), which characterizes `critical quantum chaos', in 2D disordered systems with…
Unified Models at Intermediate Energy Scales and Kaluza-Klein Excitations
G. K. Leontaris, N. D. Tracas
We discuss the possibility of intermediate gauge coupling unification in unified models of string origin. Useful relations of the β-function coefficients are derived, which ensure…
The Matrix model and the non-commutative geometry of the supermembrane
E. G. Floratos, G. K. Leontaris
This is a short note on the relation of the Matrix model with the non-commutative geometry of the 11-dimensional supermembrane. We put forward the idea that M-theory is described b…
Yukawa couplings and proton decay in SUSY models
Mario E. Gomez
We discuss proton decay induced by dimension--5 operators in supersymmetric models containing extra hypercharge-1/3 color-triplets. We derive a general formula relating dimension-5…
Lepton Flavor Violation in SUSY models with U(1)-textures
Mario E. Gomez
U(1)-family symmetries have led to successful predictions of the fermion mass spectrum and the mixing angles of the hadronic sector. In the context of the supersymmetric unified th…
New Minimal Extension of MSSM
C. Panagiotakopoulos, K. Tamvakis
We construct a new minimal extension of the Minimal Supersymmetric Standard Model (MSSM) by promoting the -parameter to a singlet superfield. The resulting renormalizable superp…
Higgs Mass Textures in Flipped SU(5)
John Ellis, G. K. Leontaris, J. Rizos
We analyze the Higgs doublet-triplet mass splitting problem in the version of flipped SU(5) derived from string theory. Analyzing non-renormalizable terms up to tenth order in the…
Neutrinoless Double Beta Decay in Gauge Theories
J. D. Vergados
Neutrinoless double beta decay is a very important process both from the particle and nuclear physics point of view. Its observation will severely constrain the existing models and…
On the virial coefficients of nonabelian anyons
Alexios P. Polychronakos
We study a system of nonabelian anyons in the lowest Landau level of a strong magnetic field. Using diagrammatic techniques, we prove that the virial coefficients do not depend on…
Ideal magnetohydrodynamic equilibria with helical symmetry and incompressible flows
G. N. Throumoulopoulos, H. Tasso
A recent study on axisymmetric ideal magnetohydrodynamic equilibria with incompressible flows [H. Tasso and G. N. Throumoulopoulos, Phys. Plasmas {\bf 5}, 2378 (1998)] is extended…
Low Scale Unification, Newton's Law and Extra Dimensions
E. G. Floratos, G. K. Leontaris
Motivated by recent work on low energy unification, in this short note we derive corrections on Newton's inverse square law due to the existence of extra decompactified dimensions.…
Additional Nucleon Current Contributions to Neutrinoless Double Beta Decay
F. Simkovic, G. Pantis, J. D. Vergados +1
We have examined the importance of momentum dependent induced nucleon currents such as weak-magnetism and pseudoscalar couplings to the amplitude of neutrinoless double beta decay…
An efficient renormalization group improved implementation of the MSSM effective potential
D. V. Gioutsos
In the context of MSSM, a novel improving procedure based on the renormalization group equation is applied to the effective potential in the Higgs sector. We focus on the one-loop…
Godel-type Universes in String-inspired Charged Gravity
P. Kanti, C. E. Vayonakis
We consider a string-inspired, gravitational theory of scalar and electromagnetic fields and we investigate the existence of axially-symmetric, Gödel-type cosmological solutions. T…
Exotic muon-electron conversion in nuclei and R-parity violating supersymmetry
Amand Faessler, T. S. Kosmas, Sergey Kovalenko +1
The flavor violating conversion in nuclei is studied within the minimal supersymmetric standard model. We focus on the R-parity violating contributions at tree level incl…
Tests of the Equivalence Principle with Neutral Kaons
CPLEAR Collaboration, J. Ellis, N. E. Mavromatos +1
We test the Principle of Equivalence for particles and antiparticles, using CPLEAR data on tagged K0 and K0bar decays into pi^+ pi^-. For the first time, we search for possible ann…
Critical quantum chaos and the one dimensional Harper model
S. N. Evangelou, J. -L. Pichard
We study the quasiperiodic Harper's model in order to give further support for a possible universality of the critical spectral statistics. At the mobility edge we numerically obta…
String Unification at Intermediate Energies: Phenomenological Viability and Implications
G. K. Leontaris, N. D. Tracas
Motivated by the fact that the string scale can be many orders of magnitude lower than the Planck mass, we investigate the required modifications in the MSSM --functions in orde…