Université de Strasbourg

output

19932026

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 1999Show all

20 papers · 1 filter

hep-th1999★ 4 cited

Flow Equations for U_k and Z_k

Vincenzo Branchina

By considering the gradient expansion for the wilsonian effective action S_k of a single component scalar field theory truncated to the first two terms, the potential U_k and the k…

nucl-th1999★ 16 cited

On neutral pion electroproduction off deuterium

V. Bernard, H. Krebs, Ulf-G. Meißner

Threshold neutral pion electroproduction on the deuteron is studied in the framework of baryon chiral perturbation theory at next-to-leading order in the chiral expansion. To this…

gr-qc1999★ 52 cited

Spin-spin effects in radiating compact binaries

László Á. Gergely

The dynamics of a binary system with two spinning components on an eccentric orbit is studied, with the inclusion of the spin-spin interaction terms appearing at the second post-Ne…

astro-ph1999★ 2 cited

RX J0420.0-5022: An isolated neutron star candidate with evidence for 22.7 s X-ray pulsations

F. Haberl, W. Pietsch, C. Motch

We report the discovery of a new isolated neutron star candidate, RX J0420.0-5022, showing evidence (4 sigma) for 22.7 s X-ray pulsations in ROSAT data. NTT observations of the fie…

astro-ph1999★ 2 cited

Observations of planetary nebulae in the Galactic Bulge

F. Cuisinier, W. J. Maciel, J. Köppen +2

High quality spectrophotometric observations of 30 Planetary Nebulae in the Galactic Bulge have been made. Accurate reddenings, plasma parameters, and abundances of He,O,N,S,Ar,Cl…

nucl-th1999★ 13 cited

Finite size effects and the order of a phase transition in fragmenting nuclear systems

J. M. Carmona, N. Michel, J. Richert +1

We discuss the implications of finite size effects on the determination of the order of a phase transition which may occur in infinite systems. We introduce a specific model to whi…

astro-ph1999★ 63 cited

Lifetimes of 26Al and 34Cl in an astrophysical plasma

A. Coc, M. G. Porquet, F. Nowacki

We study here the onset of thermal equilibrium affecting the lifetimes of 26Al and 34Cl nuclei within a hot astrophysical photon gas. The 26Al isotope is of prime interest for gamm…

hep-ph1999★ 2 cited

Dynamical Manifestation of the Goldstone Phenomenon at 1-loop

Sz. Borsanyi, A. Patkos, Zs. Szep

We have calculated the damping rate $Γ (∣ k ∣)$ for classical on-shell Goldstone modes of the O(2) symmetric scalar fields propagating in a thermal medium of the broken symmetry…

nucl-ex1999

Cluster Emission of $^{8}$ Be in the $^{28}$ Si+ $^{12}$ C Fusion Reaction at Low Temperature

M. Rousseau, C. Beck, C. Bhattacharya +6

Inclusive as well as exclusive energy spectra of the light charged particles emitted in the $^{28}$ Si ( $E_{l ab}$ =112.6 MeV) + $^{12}$ C reaction has been measured using the {\bf ICA…

hep-th1999★ 2 cited

Is the axial anomaly really determined in a continuous non-perturbative regularization?

J. L. Jacquot

In the framework of a gauge invariant continuous and non-perturbative regularization scheme based on the smearing of point like interactions by means of cutoff functions, we show t…

nucl-th1999★ 40 cited

Superdeformed bands in 32S and neighboring nuclei predicted within the Hartree-Fock method

H. Molique, J. Dobaczewski, J. Dudek

Superdeformed configurations in 32S, and in neighboring nuclei 33S, 31S, 33Cl, and 31P, are determined within the Hartree-Fock approach with the Skyrme interaction. Energies, angul…

hep-ph1999★ 53 cited

One-loop analysis of the reaction pi N to pi pi N

Nadia Fettes, Véronique Bernard, Ulf-G. Meißner

Single pion production off nucleons is studied in the framework of heavy baryon chiral perturbation theory to third order in the chiral expansion. Using total and some older differ…

hep-th1999★ 63 cited

Optimization of Renormalization Group Flow

Sen-Ben Liao, Janos Polonyi, Michael Strickland

Renormalization group flow equations for scalar lambda Phi^4 are generated using three classes of smooth smearing functions. Numerical results for the critical exponent nu in three…

chao-dyn1999★ 5 cited

Distributions of Transition Matrix Elements in Classically Mixed Quantum Systems

D. Boose, J. Main

The quantitative contributions of a mixed phase-space to the mean characterizing the distribution of diagonal transition matrix elements and to the variance characterizing the dist…

hep-th1999★ 25 cited

Wegner-Houghton equation and derivative expansion

A. Bonanno, V. Branchina, H. Mohrbach +1

We study the derivative expansion for the effective action in the framework of the Exact Renormalization Group for a single component scalar theory. By truncating the expansion to…

nucl-th1999★ 211 cited

Shell model calculations of stellar weak interaction rates: I. Gamow-Teller distributions and spectra of nuclei in the mass range A=45-65

E. Caurier, K. Langanke, G. Martinez-Pinedo +1

Electron capture and beta-decay rates on nuclei in the mass range A=45-65 play an important role in many astrophysical environments. The determination of these rates by large-scale…

hep-lat1999★ 8 cited

Periodic vacuum and particles in two dimensions

Marianne Dufour Fournier, Janos Polonyi

Different dynamical symmetry breaking patterns are explored for the two dimensional phi4 model with higher order derivative terms. The one-loop saddle point expansion predicts a ra…

cs.DL1999

Digital Library Technology for Locating and Accessing Scientific Data

Robert E. McGrath, Joe Futrelle, Ray Plante +1

In this paper we describe our efforts to bring scientific data into the digital library. This has required extension of the standard WWW, and also the extension of metadata standar…

gr-qc1999★ 9 cited

A Spherically Symmetric Closed Universe as an Example of a 2D Dilatonic Model