Martine Maes

Publications (176) View all

• Source

  Available from: Luigi Benussi

  Dataset: PhysRevLett-1.110.081803

  S Chatrchyan, V Khachatryan, A M Sirunyan, A Tumasyan, W Adam, E Aguilo, T Bergauer, M Dragicevic, J Erö, C Fabjan, [......], W L Aldá Júnior, W Carvalho, J Chinellato, A Custódio, E M Da Costa, D De Jesus Damiao, C De Oliveira Martins, S Fonseca De Souza, H Malbouisson, M Malek
• Source

  Available from: Francisco Matorras

  Article: Study of the Mass and Spin-Parity of the Higgs Boson Candidate via Its Decays to Z Boson Pairs.

  S Chatrchyan, V Khachatryan, A M Sirunyan, A Tumasyan, W Adam, E Aguilo, T Bergauer, M Dragicevic, J Erö, C Fabjan, [......], R Loveless, A Mohapatra, M U Mozer, I Ojalvo, F Palmonari, G A Pierro, I Ross, A Savin, W H Smith, J Swanson
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  ABSTRACT: A study is presented of the mass and spin-parity of the new boson recently observed at the LHC at a mass near 125 GeV. An integrated luminosity of 17.3 fb^{-1}, collected by the CMS experiment in proton-proton collisions at center-of-mass energies of 7 and 8 TeV, is used. The measured mass in the ZZ channel, where both Z bosons decay to e or μ pairs, is 126.2±0.6(stat)±0.2(syst) GeV. The angular distributions of the lepton pairs in this channel are sensitive to the spin-parity of the boson. Under the assumption of spin 0, the present data are consistent with the pure scalar hypothesis, while disfavoring the pure pseudoscalar hypothesis.
  Physical Review Letters 02/2013; 110(8):081803. · 7.37 Impact Factor
• Article: Search for Pair Production of Third-Generation Leptoquarks and Top Squarks in pp Collisions at sqrt[s]=7 TeV.

  S Chatrchyan, V Khachatryan, A M Sirunyan, A Tumasyan, W Adam, E Aguilo, T Bergauer, M Dragicevic, J Erö, C Fabjan, [......], J Leonard, R Loveless, A Mohapatra, I Ojalvo, F Palmonari, G A Pierro, I Ross, A Savin, W H Smith, J Swanson
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  ABSTRACT: Results are presented from a search for the pair production of third-generation scalar and vector leptoquarks, as well as for top squarks in R-parity-violating supersymmetric models. In either scenario, the new, heavy particle decays into a τ lepton and a b quark. The search is based on a data sample of pp collisions at sqrt[s]=7 TeV, which is collected by the CMS detector at the LHC and corresponds to an integrated luminosity of 4.8 fb^{-1}. The number of observed events is found to be in agreement with the standard model prediction, and exclusion limits on mass parameters are obtained at the 95% confidence level. Vector leptoquarks with masses below 760 GeV are excluded and, if the branching fraction of the scalar leptoquark decay to a τ lepton and a b quark is assumed to be unity, third-generation scalar leptoquarks with masses below 525 GeV are ruled out. Top squarks with masses below 453 GeV are excluded for a typical benchmark scenario, and limits on the coupling between the top squark, τ lepton, and b quark, λ_{333}^{'} are obtained. These results are the most stringent for these scenarios to date.
  Physical Review Letters 02/2013; 110(8):081801. · 7.37 Impact Factor
• Source

  Available from: Gulsen Onengut

  Article: Measurement of the Υ(1S), Υ(2S), and Υ(3S) Polarizations in pp Collisions at sqrt[s]=7 TeV.

  S Chatrchyan, V Khachatryan, A M Sirunyan, A Tumasyan, W Adam, E Aguilo, T Bergauer, M Dragicevic, J Erö, C Fabjan, [......], C Lazaridis, R Loveless, A Mohapatra, I Ojalvo, F Palmonari, G A Pierro, I Ross, A Savin, W H Smith, J Swanson
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  ABSTRACT: The polarizations of the Υ(1S), Υ(2S), and Υ(3S) mesons are measured in proton-proton collisions at sqrt[s]=7 TeV, using a data sample of Υ(nS)→μ^{+}μ^{-} decays collected by the CMS experiment, corresponding to an integrated luminosity of 4.9 fb^{-1}. The dimuon decay angular distributions are analyzed in three different polarization frames. The polarization parameters λ_{ϑ}, λ_{φ}, and λ_{ϑφ}, as well as the frame-invariant quantity λ[over ˜], are presented as a function of the Υ(nS) transverse momentum between 10 and 50 GeV, in the rapidity ranges |y|<0.6 and 0.6<|y|<1.2. No evidence of large transverse or longitudinal polarizations is seen in the explored kinematic region.
  Physical Review Letters 02/2013; 110(8):081802. · 7.37 Impact Factor
• Source

  Available from: Joachim Vandroemme

  Article: Xanthomonas arboricola pv. fragariae: what's in a name?

  J Vandroemme, B Cottyn, J F Pothier, V Pflüger, B Duffy, M Maes
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  ABSTRACT: Polyphasic analysis exposed important heterogeneity between bacterial strains catalogued as Xanthomonas arboricola pv. fragariae (Xaf) from different culture collections. Two draft whole-genome sequences revealed pathogenicity related genes of the type-three secretion system in strain LMG 19146, whereas none were found in the Xaf pathotype strain LMG 19145. Also, considerable sequence divergence was observed in the phylogenetic marker genes gyrB, rpoD, dnaK and fyuA. Further study of 16 Xaf culture-collection strains showed that co-classification is not justified. Partial 16S rRNA gene and gyrB sequencing demonstrated that 12 strains belonged to X. arboricola, but that they did not form one homogeneous group within the species. The four remaining strains were identified as Xanthomonas fragariae and Xanthomonas sp. All sequence-based identifications were confirmed by MALDI-TOF MS fingerprinting. Also, the path-ogenicity genes hrcQ and avrBs2 were detected in only three of the 12 analysed X. arboricola strains. The X. arborico-la and Xanthomonas sp. strains showed pectolytic activity, and upon inoculation in strawberry none of the strains reproduced the leaf blight symptoms reported for Xaf. This study demonstrates that (i) no clear criteria exist for the identification of strains as Xaf, (ii) the name Xaf is currently used for a genetically diverse assortment of strains, and (iii) the species X. arboricola holds many undetermined plant-associated bacteria besides the described pathovars.
  Plant Pathology 01/2013; · 2.13 Impact Factor