Université Paris-Sud

output

19922026

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 1997Show all

83 papers · 1 filter

hep-ph1997★ 1 cited

Exclusive photoproduction of $Φ$ on Proton in the quark-diquark model

C. Carimalo, N. Arteaga-Romero, S. Ong

We present predictions for the exclusive photoproduction of $Φ$ -meson on Proton at large tranfer, where we use a quark-diquark structure model for the proton. Extrapolation from ou…

hep-ph1997

The gaussian propagator formalism and the determination of the leading Regge trajectory for phi^3 field theory

Richard Hong Tuan

As the number of loops goes to infinity Feynman $α$ -parameters undergo a fixing mechanism which entails a gaussian representation for propagators in scalar field theories. Here, we…

cond-mat.str-el1997★ 10 cited

Revival of the spin-Peierls transition in Cu_xZn_(1-x)GeO_3 under pressure

M. Fischer, P. H. M. van Loosdrecht, P. Lemmens +8

Pressure and temperature dependent susceptibility and Raman scattering experiments on single crystalline Cu_xZn_(1-x)GeO_3 have shown an unusually strong increase of the spin-Peier…

nucl-ex1997★ 110 cited

New measurement and analysis of the 7Be(p,gamma)8B cross section

F. Hammache, G. Bogaert, P. Aguer +13

Cross sections for the 7Be(p,gamma)8B reaction have been measured for E_c.m.= 0.35-1.4 MeV using radioactive 7Be targets. Two independent measurements carried out with different be…

cond-mat1997

High frequency magneto-electrodynamics of La_(1-x)Sr_xMnO3 single crystals

H. Srikanth, B. Revcolevschi, S. Sridhar +2

The radio frequency (RF) response of La1-xSrxMnO3 single crystals reveal a variety of features associated with the structural, electronic and magnetic properties of the system. The…

cond-mat1997★ 81 cited

Quantum aging in mean-field models

Leticia F. Cugliandolo, Gustavo Lozano

We study the real-time dynamics of quantum models with long-range interactions coupled to a heat-bath within the closed-time path-integral formalism. We show that quantum fluctuati…

hep-ph1997★ 3 cited

Multibody neutrino exchange in a neutron star: neutrino sea and border effects

As. Abada, O. Pène, J. Rodriguez-Quintero

The interaction due to the exchange of massless neutrinos between neutrons is a long-range force. Border effects on this multibody exchange inside a dense core are studied and comp…

hep-ph1997★ 8 cited

Alternative Theories of CP violation

Riccardo Barbieri, Lawrence Hall, Achille Stocchi +1

Recent improvements to the limit of Delta M_{B_s} imply that pure superweak theories, while not excluded, no longer provide a good fit to the data. A class of general superweak the…

cond-mat.supr-con1997★ 9 cited

Cu(2) nuclear resonance evidence for an original magnetic phase in aged 60K-superconductors RBa2Cu3O6+x (R=Tm,Y)

A. V. Dooglav, H. Alloul, O. N. Bakharev +7

It is widely believed that the long-range antiferromagnetic order in the RBa2Cu3O6+x compounds (R=Y and rare earths except of Ce, Pr, Tb) is totally suppressed for the oxygen index…

hep-ph1997★ 17 cited

Neutralino Cascades in the (M+1)SSM

U. Ellwanger, C. Hugonie

In the (M+1)SSM an additional gauge singlet Weyl spinor appears in the neutralino sector. For a large part of the parameter space this approximative eigenstate is the true LSP. The…

hep-ex1997★ 17 cited

DIRC, the Internally Reflecting Ring Imaging Cherenkov Detector for BABAR

DIRC Collaboration

The DIRC is a new type of Cherenkov imaging device that will be used for the first time in the BABAR detector at the asymmetric B-factory, PEP-II. It is based on total internal ref…

cond-mat.mes-hall1997★ 93 cited

Boundary conditions at the mobility edge

D. Braun, G. Montambaux, M. Pascaud

It is shown that the universal behavior of the spacing distribution of nearest energy levels at the metal--insulator Anderson transition is indeed dependent on the boundary conditi…

astro-ph1997

AGAPEROS: Searches for microlensing in the LMC with the Pixel Method. I. Data treatment and pixel light curves production

A. -L. Melchior

Recent surveys monitoring millions of light curves of resolved stars in the LMC have discovered several microlensing events. Unresolved stars could however significantly contribute…

hep-ex1997★ 30 cited

Photo-production of psi' Mesons at HERA

C. Adloff

Quasi-elastic (z >0.95) photo-production of psi' mesons has been observed at HERA for photon-proton centre-of-mass energies in the range 40 to 160 GeV. The psi' mesons were identif…

cond-mat.mes-hall1997★ 9 cited

Sign Reversals of ac Magnetoconductance in Isolated Quantum Dots

Yves Noat, Helene Bouchiat, Bertrand Reulet +1

We have measured the electromagnetic response of micron-size isolated mesoscopic GaAs/GaAlAs square dots down to temperature T=16mK, by coupling them to an electromagnetic micro-re…

hep-ph1997★ 132 cited

Improved Determination of alpha_QED(M_Z^2) and the Anomalous Magnetic Moment of the Muon

M. Davier, A. Hoecker

We reevaluate the hadronic contribution to the running of the QED fine structure constant alpha(s) at s = M_Z^2. We use data from e+e- annihilation and tau decays at low energy and…

cond-mat.str-el1997★ 6 cited

Optical spectroscopy on the spin-Peierls compound CuGeO $_{3}$

P. H. M. van Loosdrecht

An overview is given of Raman and infrared spectroscopic studies of the inorganic spin-Peierls compound CuGeO $_{3}$ , with an emphasis on the magnetic fluctuations in the uniform, dim…

nucl-th1997★ 32 cited

Dynamics of a Simple Quantum System in a Complex Environment

Aurel Bulgac, Gui DoDang, Dimitri Kusnezov

We present a theory for the dynamical evolution of a quantum system coupled to a complex many-body intrinsic system/environment. By modelling the intrinsic many-body system with pa…

hep-ph1997★ 38 cited

Measurements of the $ρ$ and $η$ parameters of the $V_{C K M}$ matrix and perspectives

P. Paganini, F. Parodi, P. Roudeau +1

A review of the current status of the Cabibbo-Kobayashi-Maskawa matrix ( $V_{C K M}$ ) is presented and a special emphasis is put on the determination of the $ρ$ and $η$ parameters. Fr…

cond-mat.str-el1997★ 27 cited

Observation of three-magnon light scattering in CuGeO_3

G. Els, P. H. M. van Loosdrecht, P. Lemmens +7

Temperature and magnetic field dependent polarized Brillouin spectra of CuGeO_3 are reported. In addition to a bound singlet state at 30 cm^{-1}, a new feature has been observed at…

cond-mat.mes-hall1997★ 68 cited

Conductivity and Atomic Structure of Isolated Multiwalled Carbon Nanotubes

A. Yu. Kasumov, H. Bouchiat, B. Reulet +4

We report associated high resolution transmission electron microscopy (HRTEM) and transport measurements on a series of isolated multiwalled carbon nanotubes. HRTEM observations, b…

hep-ex1997★ 24 cited

Updated measurement of the tau lepton lifetime

The ALEPH Collaboration

A new measurement of the mean lifetime of the tau lepton is presented. Three different analysis methods are applied to a sample of 90000 tau pairs, collected in 1993 and 1994 with…