European Organization for Nuclear Research

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions

Showing 1998Show all

421 papers · 1 filter

hep-ph1998★ 36 cited

$γ^{} γ^{}$ total cross-section in the dipole picture of BFKL dynamics

M. Boonekamp, A. De Roeck, C. Royon +1

The total $γ^{*} γ^{*}$ cross-section is derived in the Leading Order QCD dipole picture of BFKL dynamics, and compared with the one from 2-gluon exchange. The Double Leading Logarithm…

hep-ph1998★ 792 cited

The Masses of the Neutral CP-even Higgs Bosons in the MSSM: Accurate Analysis at the Two-Loop Level

S. Heinemeyer, W. Hollik, G. Weiglein

We present detailed results of a diagrammatic calculation of the leading two-loop QCD corrections to the masses of the neutral CP-even Higgs bosons in the Minimal Supersymmetric St…

physics.ins-det1998★ 16 cited

X-ray Imaging Using a Hybrid Photon Counting GaAs Pixel Detector

C. Schwarz, M. Campbell, R. Goeppert +11

The performance of hybrid GaAs pixel detectors as X-ray imaging sensors were investigated at room temperature. These hybrids consist of 300 mu-m thick GaAs pixel detectors, flip-ch…

nucl-ex1998★ 183 cited

Decay of neutron-rich Mn nuclides and deformation of heavy Fe isotopes

M. Hannawald, T. Kautzsch, A. Woehr +12

The use of chemically selective laser ionization combined with beta-delayed neutron counting at CERN/ISOLDE has permitted identification and half-life measurements for 623-ms Mn-61…

hep-th1998★ 3 cited

On (multi-)center branes and exact string vacua

Konstadinos Sfetsos

Multicenter supergravity solutions corresponding to Higgs phases of supersymmetric Yang-Mills theories are considered. For NS5 branes we identify three cases where there is a descr…

hep-ph1998★ 58 cited

Physics Implications of Flat Directions in Free Fermionic Superstring Models II: Renormalization Group Analysis

G. Cleaver, M. Cvetic, J. R. Espinosa +3

We continue the investigation of the physics implications of a class of flat directions for a prototype quasi-realistic free fermionic string model (CHL5), building upon the result…

physics.atom-ph1998

On the Stability Domain of Systems of Three Arbitrary Charges

Ali Krikeb, Andre Martin, Jean-Marc Richard +1

We present results on the stability of quantum systems consisting of a negative charge $- q_{1}$ with mass $m_{1}$ and two positive charges $q_{2}$ and $q_{3}$ , with masses $m_{2}$ and $m…

physics.data-an1998★ 1 cited

The Signal Estimator Limit Setting Method

S. Jin, P. McNamara

A new method of background subtraction is presented which uses the concept of a signal estimator to construct a confidence level which is always conservative and which is never bet…

hep-th1998★ 14 cited

Duality from Topological Symmetry

L Baulieu, S. L. Shatashvili

We describe topological gauge theories for which duality properties are encoded by construction. We study them for compact manifolds of dimensions four, eight and two. The fields a…

hep-ex1998★ 8 cited

A study of the centrally produced baryon-antibaryon systems in pp interactions at 450 GeV/c

The WA102 Collaboration, D. Barberis et al

A study of the centrally produced ppbar, ppbarpi, ppbarpipi and lambda lambda channels has been performed in pp collisions using an incident beam momentum of 450 GeV/c. No signific…

astro-ph1998★ 1 cited

AgapeZ1: a Large Amplification Microlensing Event or an Odd Variable Star Towards the Inner Bulge of M31

R. Ansari, M. Auriere, P. Baillon +14

AgapeZ1 is the brightest and the shortest duration microlensing candidate event found in the Agape data. It occured only 42" from the center of M31. Our photometry shows that the h…

hep-ph1998

Probing the Structure of the Pomeron

J. Ellis, G. G. Ross, J. Williams

We suggest that the pseudo-rapidity cut dependence of diffractive deep-inelastic scattering events at HERA may provide a sensitive test of models of diffraction. A comparison with…

physics.ins-det1998★ 10 cited

Imaging Hybrid Photon Detectors with Minimized Dead Area and Protection Against Positive Ion Feedback

Daniel Ferenc

Imaging Hybrid Photon Detectors (HPD) have been developed for integration in large area Cherenkov detectors for high energy physics and astrophysics. The presented designs - develo…

hep-ph1998★ 342 cited

Theoretical Update of Pseudoscalar Meson Distribution Amplitudes of Higher Twist: The Nonsinglet Case

Patricia Ball

We discuss the two and three particle light-cone distribution amplitudes (DAs) of pseudoscalar nonsinglet mesons of twist 3 and 4. Using nonlocal operator identities and conformal…

hep-ph1998★ 40 cited

Comment on "Calculation of Quarkonium Spectrum and m_b, m_c to Order alpha^4"

A. Pineda, F. J. Yndurain

In a recent paper, we included two loop, relativistic one loop and second order relativistic tree level corrections, plus leading nonperturbative contributions, to obtain a calcula…

hep-ph1998★ 1 cited

U_A(1) Problems and Gluon Topology - Anomalous Symmetry in QCD

G. M. Shore

Many of the distinctive and subtle features of the dynamics in the $U_{A} (1)$ channel in QCD can be related to gluon topology, more precisely to the topological susceptibility $χ(k^2…

hep-ex1998★ 16 cited

A Measurement of the tau->electron Branching Ratio

The OPAL Collaboration, G. Abbiendi et al

The branching ratio for the decay tau->e nue nutau has been measured using Z0 decay data collected by the OPAL experiment at LEP. In total 33073 tau->e nue nutau candidates were id…

hep-th1998★ 12 cited

Five-Dimensional Gauged Supergravity and Supersymmetry Breaking in $M$ ~Theory

John Ellis, Zygmunt Lalak, Witold Pokorski

We extend the formulation of gauged supergravity in five dimensions, as obtained by compactification of $M$ ~theory on a deformed Calabi-Yau manifold, to include non-universal matte…

hep-ph1998★ 41 cited

Topological Charge Screening and the `Proton Spin' Beyond the Chiral Limit

S. Narison, G. M. Shore, G. Veneziano

The theory of the `proton spin' effect proposed in our earlier papers is extended to include the chiral SU(3) symmetry breaking and flavour mixing induced by non-vanishing quark ma…

hep-lat1998★ 45 cited

Cooling, Physical Scales and Topology

Margarita Garcia Perez, Owe Philipsen, Ion Olimpiu Stamatescu

We develop a cooling method controlled by a physical cooling radius that defines a scale below which fluctuations are smoothed out while leaving physics unchanged at all larger sca…

hep-th1998★ 41 cited

Subleading Corrections and Central Charges in the AdS/CFT Correspondence

D. Anselmi, A. Kehagias

We explore subleading contributions to the two basic central charges c and a of four-dimensional conformal field theories in the AdS/CFT scheme. In particular we probe subleading c…

hep-ph1998★ 44 cited

Violation of Time-Reversal Invariance and CPLEAR Measurements

Luis Alvarez-Gaume, Costas Kounnas, Smaragda Lola +1

Motivated by the recent CPLEAR measurement on the time-reversal non-invariance, we review the situation concerning the experimental measurements of charge conjugation, parity viola…

hep-ph1998★ 10 cited

Talk on QCD Calculations by Numerical Integration

Davison E. Soper

Calculations in Quantum Chromodynamics are typically performed using a method pioneered by Ellis, Ross and Terrano in 1981. In this method, one combines numerical integrations over…

hep-ph1998★ 1.1k cited

FeynHiggs: a program for the calculation of the masses of the neutral CP-even Higgs bosons in the MSSM