Institut de recherche en mathématique et physique (IRMP)

L’institut IRMP, Institut de Recherche en Mathématique et Physique, organise une recherche dans les domaines suivants.

En mathématique les recherches touchent à l’analyse, l’algèbre, la géométrie et la topologie, les probabilités et la physique mathématique.

En physique les recherches concernent l’étude des interactions fondamentales tant au niveau des particules élémentaires qu’au niveau de la cosmologie.

La recherche développée dans l’institut va de l’observation systématique de notre univers dans l’infiniment petit et l’infiniment grand, à l’exploration de structures et de mondes mathématiques riches et variés.

En plus de ses centres et goupes de recherche, l'Institut comprend le CRC, Centre de Recherches du Cyclotron, et bénéficie d'un ensemble d'ateliers techniques.

Président : Yves FELIX

Actualités

CP3 News

	14 Dec 2011	CMS search for the Standard Model Higgs Boson in LHC data from 2010 and 2011 CMS preliminary results, exclude the existence of the Standard Model (SM) Higgs boson in a wide range of possible Higgs boson masses: 127 600 GeV at 95% confidence level. Compared to the SM prediction there is an excess of events in the mass region around 125GeV, that appears, quite consistently, in five independent channels. The excess is most compatible with an SM Higgs hypothesis in the vicinity of 124 GeV and below, but with a statistical significance of less than 2 standard deviations (2σ) from the known backgrounds, once the so-called Look-Elsewhere Effect has been taken into account. CMS search for the Standard Model Higgs Boson in LHC data from 2010 and 2011
	28 Jun 2011	First measurement of the exclusive muon pair production at the LHC Three CP3 members made a novel study at the LHC. For the first time, the measurement of exclusive production of muon pairs has been performed in very demanding conditions of high event pileup (i.e. multiple interactions in one beam crossing). This opens the way for an original and precise luminosity measurement, as well as for unique studies of the high energy photon interactions at the LHC. First measurement of the exclusive muon pair production at the LHC
	22 Mar 2011	First observation of Z+b process at LHC CP3 members contributed another prime measurement at LHC, with the early observation of the Z+b process at LHC. For the first time, the Z+bb candidates are also presented. This preliminary result is being shown at "Moriond 2011", the most important Winter conference in High Energy Physics. First observation of Z+b process at LHC
	13 Mar 2011	First Single Top measurement at 7 TeV After the first top-quark pair production cross section in November'10, CP3 contributes again to a first cross section measurement at 7 TeV, this time of single-top production in t-channel. This preliminary result is being shown at "Moriond 2011", the most important Winter conference in High Energy Physics. [Update, March 15]: article on Symmetry Magazine. First Single Top measurement at 7 TeV
	17 Feb 2011	First CP3 CMS search paper accepted for publication by JHEP The CMS paper "Search for Heavy Stable Charged Particles in pp collisions at sqrt(s)=7 TeV" has been accepted for publication by JHEP. This is an almost 100% CP3 paper. Only 3 papers before this one have been published by CMS (2100 authors) on searches for new physics. First CP3 CMS search paper accepted for publication by JHEP
	23 Nov 2010	Cover plot on the European Physical Journal: CMS dE/dx The plot demonstrating the capability of CMS of identifying particles via the ionization energy loss measurement, fully developed by CP3 members, stands alone on the cover of the last issue of the European Physical Journal C Cover plot on the European Physical Journal: CMS dE/dx
	30 Sep 2010	W+jets measurement at CMS compared with MadGraph predictions Madgraph predictions on the production of W boson accompanied with jets match proton collision data taken by CMS at the LHC (CERN). W+jets measurement at CMS compared with MadGraph predictions
	23 Sep 2010	New two-particle correlations observed in CMS detector at the LHC The CMS Collaboration at CERN released a paper entitled Observation of Long-Range Near-Side Angular Correlations in Proton-Proton Collisions that details signs of a new phenomenon in proton interactions. A study of high multiplicity collisions, where a hundred or more charged particles are produced, has revealed indications that some particles are somehow correlated associated together when they were created at the point of collision. It was considered natural to search for these correlations in the highest multiplicity proton-proton collisions at LHC as the particle densities begin to approach those in high-energy collisions of nuclei such as copper, where similar effects have already been seen... New two-particle correlations observed in CMS detector at the LHC
	30 Jul 2010	CP3 CMS results at ICHEP Among the results presented by the CMS collaboration at ICHEP 2010, most important Summer conference in High Energy Physics, the first top quark candidate events at 7 TeV (shown in Figure: a dileptonic event with two secondary vertices attributed to the decays of b quarks) and an improved exclusion of long-lived gluinos as well as a measurement of the CMS Tracker material. CP3 gave a strong contribution to these achievements. CP3 CMS results at ICHEP
	29 Jul 2010	Sleeper field awoke to expand universe The New Scientist magazine features research from C. Ringeval, T. Suyama (UCLouvain) and T. Takahashi, M. Yamaguchi and S. Yokoyama from Japan about dark energy (preprint available from arXiV). According to their model and current cosmological observations, inflation should occur at the TeV scale, i.e. precisely in the LHC search area. Sleeper field awoke to expand universe

actualité


> Prix Adolphe Wetrems Ce samedi 17 décembre à l'Académie, le professeur Jean VANSCHAFTINGEN recevra le prix Adolphe Wetrems (sciences mathématiques et physique). Il partegera ce prix avec Nicolas Chamel, astrophysicien à l’ULB. [16/12]


> Tom CLAEYS - Prix Szegö 2011 Le prix Gabor Szegö 2011 vient d'être attribué à Tom Claeys (MATH / IRMP) pour ses contributions à la théorie des fonctions de Painlevé, dans lesquelles il apporte un éclairage nouveau sur les liens entre les équations de Painlevé et la théorie des matrices aléatoires. [17/05]


		> Communiqué de presse du Centre pour le développement de l'enseignement supérieur (CDES), Gütersloh, Allemagne CHE ExcellenceRanking 2010: Le département de Mathématique de l‘Université Catholique de Louvain est particulièrement fort en recherche comparativement au reste de l’Europe et possède une orientation internationale plus importante [27/10 > suite]