213 citations · 1k across the 19 of their papers we have counts for
16 papers · 1 filter
Search for Tau Flavour Violation at the LHC
E. Carquin, J. Ellis, M. E. Gomez +2
We explore the prospects for searches at the LHC for sparticle decays that violate lepton number, in the light of neutrino oscillation data and the seesaw model for neutrino ma…
Light Heavy MSSM Higgs Bosons at Large tan_beta
J. Ellis, S. Heinemeyer, K. A. Olive +1
The region of MSSM Higgs parameter space currently excluded by the CDF Collaboration, based on an analysis of ~1 fb^-1 of integrated luminosity, is less than the expected sensitivi…
Updated Post-WMAP Benchmarks for Supersymmetry
M. Battaglia, A. De Roeck, J. Ellis +3
We update a previously-proposed set of supersymmetric benchmark scenarios, taking into account the precise constraints on the cold dark matter density obtained by combining WMAP an…
Tau Flavour Violation in Sparticle Decays at the LHC
D. F. Carvalho, J. Ellis, M. E. Gomez +2
We consider sparticle decays that violate tau lepton number, motivated by neutrino oscillation data. We work in the context of the constrained minimal supersymmetric extension of t…
A light Higgs Boson would invite Supersymmmetry
John Ellis, Douglas Ross
If the Higgs boson weighs about 115 GeV, the effective potential of the Standard Model becomes unstable above a scale of about 10^6 GeV. This instability may be rectified only by n…
Flat Directions in Flipped SU(5) I: All-Order Analysis
G. B. Cleaver, J. Ellis, D. V. Nanopoulos
We present a systematic classification of field directions for the string-derived flipped SU(5) model that are D- and F-flat to all orders. Properties of the flipped SU(5) model wi…
Charged-Lepton-Flavour Violation in the Light of the Super-Kamiokande Data
John Ellis, M. E. Gomez, G. K. Leontaris +2
Motivated by the data from Super-Kamiokande and elsewhere indicating oscillations of atmospheric and solar neutrinos, we study charged-lepton-flavour violation, in particular the r…
Can Neutrinos be Degenerate in Mass?
John Ellis, Smaragda Lola
We reconsider the possibility that the masses of the three light neutrinos of the Standard Model might be almost degenerate and close to the present upper limits from Tritium beta…
Cosmological Fine Tuning, Supersymmetry, and the Gauge Heirarchy Problem
Piotr H. Chankowski, John Ellis, Keith A. Olive +1
We study the extent to which the cosmological fine-tuning problem - why the relic density of neutralino cold dark matter particles is similar to that of baryons - is related to…
Bose-Einstein Correlations in a Space-Time Approach to e+ e- Annihilation into Hadrons
K. Geiger, J. Ellis, U. Heinz +1
A new treatment of Bose-Einstein correlations is incorporated in a space-time parton-shower model for e+ e- annihilation into hadrons. Two alternative afterburners are discussed, a…
Neutrino Textures in the Light of Super-Kamiokande Data and a Realistic String Model
J. Ellis, G. K. Leontaris, S. Lola +1
Motivated by the Super-Kamiokande atmospheric neutrino data, we discuss possible textures for Majorana and Dirac neutrino masses within the see-saw framework. The main purposes of…
High-Energy QCD as a Topological Field Theory
John Ellis, N. E. Mavromatos
We propose an identification of the conformal field theory underlying Lipatov's spin-chain model of high-energy scattering in perturbative QCD. It is a twisted N=2 supersymmetric t…
An Analysis of Diffraction in Deep-Inelastic Scattering
J. Bartels, J. Ellis, H. Kowalski +1
We propose a simple parametrization for the deep-inelastic diffractive cross section. It contains the contribution of production to both the longitudinal and the transve…
Basis Independent Measures of R-parity Violation
S. Davidson, J. Ellis
We construct basis-independent expressions that measure the magnitude of -parity breaking due to possible superpotential terms in the Minimal Supersymmetric extension of the Sta…
REAL-TIME DESCRIPTION OF PARTON-HADRON CONVERSION AND CONFINEMENT DYNAMICS
John Ellis, Klaus Geiger
We propose a new and universal approach to the hadronization problem that incorporates both partonic and hadronic degrees of freedom in their respective domains of relevance, and t…
Flipped Angles and Phases: A Systematic Study
J. Ellis, J. Lopez, D. Nanopoulos +1
We discuss systematically the fermion mass and mixing matrices in a generic \linebreak field-theoretical flipped model, with particular applications to neutrino and baryon…