|
|
1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008
2009 | 2010 | 2011 | 2012
Publications FYMA
Recherchez une publication dans la base de données FYMA en
entrant des mots clés (auteurs, année, titre, ...) dans la case suivante:
21 publications trouvées pour ' 2005'
UCL-IPT-05-15
|
Auteurs:
|
Radelet-de Grave Patricia (éd.)
|
|
Titre:
|
Symétries
|
|
Références:
|
Contributions au séminaire de Han-sur-Lesse, septembre 2002, Réminisciences 7, Turnhout, Brepols, 2005, 524 p.
|
|
Résumé:
|
|
UCL-IPT-05-14 : ( pdf)
|
Auteurs:
|
Radelet-de Grave Patricia
|
|
Titre:
|
Symétrie et peinture
|
|
Références:
|
Symétries, Contributions au séminaire de Han-sur-Lesse, septembre 2002, Réminisciences 7, P. Radelet-de Grave (éd.), Turnhout, Brepols, 2005, pp.385-424
|
|
Résumé:
|
|
UCL-IPT-05-13
|
Auteurs:
|
Radelet-de Grave Patricia
|
|
Titre:
|
Cemento precompresso e sperimentazione, il ruolo di Gustave Magnel
|
|
Références:
|
International Seminar «Theory and practice of construction : knowledge, means, models», Didactic and research experiences (vol.2), Ravenna (Italie) 27-29 octobre 2005, pp.849-857
|
|
Résumé:
|
|
UCL-IPT-05-11 : ( pdf)
|
Auteurs:
|
Gérard Jean-Marc, Goffinet F. and Herquet M.
|
|
Titre:
|
A new look at an old mass relation
|
|
Références:
|
Physics Letters B633 (2006) pp. 563-566
|
|
Résumé:
|
New data from neutrino oscillation experiments motivate us to extend a successful mass relation for the charged leptons to the other fundamental fermions. This new universal relation requires a Dirac mass around 3 10^{-2} eV for the lightest neutrino and rules out a maximal atmospheric mixing. It also suggests a specific decomposition of the CKM mixing matrix.
|
UCL-IPT-05-10
|
Auteurs:
|
Wiaux Y., Jacques L., Vandergheynst P.
|
|
Titre:
|
Fast directional correlation on the sphere with steerable filters
|
|
Références:
|
Astrophysical J. (2005) submitted
|
|
Résumé:
|
An exact fast algorithm is developed for the directional correlation of
band-limited signals and steerable filters on the sphere. First, the
directional correlation is expressed as an inverse Wigner D-functions
transform on the rotation group SO(3). The separation of variables technique
is recalled, which reduces the corresponding asymptotic complexity from
O(L^5) to O(L^4), where 2L stands for the square-root of the number of
sampling points on the sphere, also setting a band limit L for the signals
considered. Second, the filter steerability gives explicitly the directional
correlation in terms of standard correlations. The standard correlation is
expressed as a sum of inverse spin-weighted spherical harmonics transforms on
the sphere. The separation of variables reduces the corresponding asymptotic
complexity of standard and directional correlations to O(L^3). For steerable
filters with low azimuthal angular band limit, a simple O(L^2 log2^2 L)
algorithm is achieved, based on the Driscoll and Healy fast scalar spherical
harmonics transform. Finally, these generic results for the scale-space
signal processing on the sphere are specifically developed in the perspective
of the wavelet analysis of the cosmic microwave background (CMB) temperature
(T ) and polarization (E and B) anisotropies. In this context, computation
times for the directional correlation of megapixels all-sky maps from the
ongoing WMAP or the forthcoming Planck Surveyor satellite missions are
typically reduced from years to seconds on a single standard computer, and
thus made easily affordable.
|
UCL-IPT-05-09
|
Auteurs:
|
Antoine Jean-Pierre
|
|
Titre:
|
Research activities in mathematical physics in Belgium
|
|
Références:
|
Physicalia Magazine 27 (2005) pp.166-171
|
|
Résumé:
|
|
UCL-IPT-05-08 : ( pdf)
|
Auteurs:
|
Gerard Jean-Marc, Smith C., Trine S.
|
|
Titre:
|
Radiative Kaon Decays and the Penguin Contribution to the $Delta I$ = 1/2 Rule
|
|
Références:
|
Nuclear Physics B730 (2005) pp. 1-36
|
|
Résumé:
|
A consistent census of penguins in the $Delta I$ = 1/2 rule is taken from the $eta_0$ pole contribution to the radiative $K_L to gamma gamma$, $K_S to pi^0 gamma gamma$ and $K^+ to pi^+ gamma gamma$ decay modes. We briefly comment on its impact for $K_L to pi^0 pi^0 gamma gamma$, $K_L to pi^+ pi^- gamma$ and check its compatibility with the $K_L - K_S$ mass difference and the CP violating $epsilon^prime / epsilon$ parameter.
|
UCL-IPT-05-07
|
Auteurs:
|
Kou E., Pene O.
|
|
Titre:
|
Suppressed decay into open charm for the Y(4260) being an hybrid
|
|
Références:
|
Physics Letters B631 (2005) pp. 164-169
|
|
Résumé:
|
|
UCL-IPT-05-06
|
Auteurs:
|
Delouille V., de Patoul J., Hochedez J-F., Jacques L., Antoine Jean-Pierre
|
|
Titre:
|
Wavelet spectrum analysis of Solar EUV images: method and applications to network characteristic scale evolution, flare nowcasting, and extraction of Active Regions with EIT/SoHO
|
|
Références:
|
Solar Physics 228 (2005) pp.303-323
|
|
Résumé:
|
|
UCL-IPT-05-04
|
Auteurs:
|
Wiaux Y, Jacques L., Vandergheynst P.
|
|
Titre:
|
Correspondence principle between spherical and Euclidean wavelets
|
|
Références:
|
Astrophysical J. 632 (2005) pp. 15-28
|
|
Résumé:
|
|
UCL-IPT-05-03
|
Auteurs:
|
Ruelle Philippe
|
|
Titre:
|
Kramers-Wannier dualities via symmetries
|
|
Références:
|
Phys. Rev. Lett. 95 (2005) 225701
cond-mat/0504758
|
|
Résumé:
|
Kramers-Wannier dualities in lattice models are intimately connected
with symmetries. We show that they can be found directly and
explicitly from the symmetry transformations of the boundary states in the
underlying conformal field theory. Intriguingly the only models with
a duality transformation turn out to be those with an auto-orbifold property.
|
UCL-IPT-05-02
|
Auteurs:
|
Artoisenet P., Gérard Jean-Marc and Weyers Jacques
|
|
Titre:
|
Survival before annihilation in $Psi'$ decays
|
|
Références:
|
Physics Letters B628 (2005) pp.211-214
|
|
Résumé:
|
|
UCL-IPT-05-01
|
Auteurs:
|
Boucher V.
|
|
Titre:
|
A new cosmological test for general relativity
|
|
Références:
|
Gravitation & Cosmology 6 (2005) pp.1-10
|
|
Résumé:
|
The effect of spatial variations of the Newton constant on the cosmic
microwave background is studied. Constraints on the strong equivalence principle violation at the recombination time are then obtained with the help of WMAP data and of the standard theory of big-bang nucleosynthesis.
|
UCL-IPT-04-25
|
Auteurs:
|
Lefevere R., Tasaki H.
|
|
Titre:
|
High-temperature expansion for nonequilibrium steady states in driven lattice gases
|
|
Références:
|
Physical Rev. Lett. 94 (2005) 200601
|
|
Résumé:
|
|
UCL-IPT-04-22 : ( pdf)
|
Auteurs:
|
Piroux G. and Ruelle Philippe
|
|
Titre:
|
Logarithmic scaling for height variables in the Abelian sandpile model
|
|
Références:
|
Phys. Lett. B 607 (2005) 188-196
|
|
Résumé:
|
We report on the exact computation of the scaling form of the 1-point function, on the
upper-half plane, of the height 2 variable in the two-dimensional Abelian sandpile model.
By comparing the open versus the closed boundary condition, we find that the scaling field
associated to the height 2 is a logarithmic scalar field of scaling dimension 2, belonging
to a c=-2 logarithmic conformal field theory. This identification is confirmed by numerical
simulations and extended to the height 3 and 4 variables, which exhibit the same scaling
form. Using the conformal setting, we make precise proposals for the bulk 2-point
functions of all height variables.
|
UCL-IPT-04-21 : ( pdf)
|
Auteurs:
|
Gérard Jean-Marc and E. Kou
|
|
Titre:
|
$eta - eta'$ masses and mixing : a large $N_C$ reappraisal
|
|
Références:
|
Physics Letters B616 (2005) pp.85-92
|
|
Résumé:
|
We reconcile the $1/N_c$ expansion with the observed $eta-eta'$ mass spectrum. The chiral corrections introduced for that purpose are natural and consistent with the octet-singlet mixing angle $theta=-(22pm 1)^{circ}$ extracted from phenomenology in the large $N_c$ limit.
|
UCL-IPT-04-20 : ( pdf)
|
Auteurs:
|
Piroux G. and Ruelle Philippe
|
|
Titre:
|
Boundary height fields in the Abelian sandpile model
|
|
Références:
|
J. Phys. A: Math. Gen. 38 (2005) 1451-1472
|
|
Résumé:
|
We study the abelian sandpile model on the upper-half plane, and reconsider the correlations of the four height variables lying on the boundary. For more convenience, we carry out the analysis in the dissipative (massive) extension of the model and identify the boundary scaling fields corresponding to the four heights. We find that they all can be accounted for by the massive pertubation of a c=-2 logarithmic conformal field theory.
|
UCL-IPT-04-12
|
Auteurs:
|
Khalil S. and Kou E.
|
|
Titre:
|
Supersymmetric contributions to $B to K pi$ branching ratio
|
|
Références:
|
Physical Review D71: 114016 (2005)
|
|
Résumé:
|
|
UCL-IPT-
|
Auteurs:
|
N. Sh. Izmailian, V.B. Priezzhev, Ph. Ruelle et C.-K. Hu
|
|
Titre:
|
Logarithmic conformal field theory and boundary effects in the dimer model
|
|
Références:
|
Phys. Rev. Lett. 95 (2005) 260602
cond-mat/0512703
|
|
Résumé:
|
We study the finite-size corrections of the dimer model on
$infty times N$ square lattice with two different boundary
conditions: free and periodic. We find that the finite-size
corrections depend in a crucial way on the parity of $N$; we also
show that such unusual finite-size behavior can be fully explained
in the framework of the $c=-2$ logarithmic conformal field theory.
|
UCL-IPT-
|
Auteurs:
|
Radelet-de Grave, Patricia
|
|
Titre:
|
Fallait-il inoculer la petite vérole ?,
|
|
Références:
|
Pour la science, février 2005, pp. 34-37.
|
|
Résumé:
|
|
UCL-IPT-
|
Auteurs:
|
Radelet-de Grave, Patricia
|
|
Titre:
|
it{Gustave Magnel (1889-1955), a scientific biography, in Essays in the history of the theory of structures, In honour of Jacques Heyman},
|
|
Références:
|
Instituto Juan de Herrera, Madrid, pp. 389-427.
|
|
Résumé:
|
|
|
