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- Measurement of the $ t\overline{t} $ production cross-section as a function of jet multiplicity and jet transverse momentum in 7 TeV proton-proton collisions with the ATLAS detectorPublication . ATLAS collaboration (2882 authors); Aguilar-Saavedra, Juan Antonio; Amor Dos Santos, Susana Patricia; Anjos, Nuno; Araque, Juan Pedro; Cantrill, Robert; Carvalho, João; Castro, Nuno Filipe; Conde Muiño, Patricia; Da Cunha Sargedas De Sousa, Mario Jose; Do Valle Wemans, André; Fiolhais, Miguel; Galhardo, Bruno; Gomes, Agostinho; Gonçalo, Ricardo; Jorge, Pedro; Lopes, Lourenco; Machado Miguens, Joana; Maio, Amélia; Maneira, José; Marques, Carlos; Onofre, António; Palma, Alberto; Pedro, Rute; Pina, João Antonio; Pinto, Belmiro; Santos, Helena; Saraiva, João; Silva, José; Tavares Delgado, Ademar; Veloso, Filipe; Wolters, HelmutThe $ t\overline{t} $ production cross-section dependence on jet multiplicity and jet transverse momentum is reported for proton-proton collisions at a centre-of-mass energy of 7 TeV in the single-lepton channel. The data were collected with the ATLAS detector at the CERN Large Hadron Collider and comprise the full 2011 data sample corresponding to an integrated luminosity of 4.6 fb$^{−1}$. Differential cross-sections are presented as a function of the jet multiplicity for up to eight jets using jet transverse momentum thresholds of 25, 40, 60, and 80 GeV, and as a function of jet transverse momentum up to the fifth jet. The results are shown after background subtraction and corrections for all known detector effects, within a kinematic range closely matched to the experimental acceptance. Several QCD-based Monte Carlo models are compared with the results. Sensitivity to the parton shower modelling is found at the higher jet multiplicities, at high transverse momentum of the leading jet and in the transverse momentum spectrum of the fifth leading jet. The MC@NLO+HERWIG MC is found to predict too few events at higher jet multiplicities.
- TRACEABILITY AND LABELLING OF SEAFOOD IN ATLANTIC AREA REGIONSPublication . Mendes, Rogério; Griffiths, Andrew; Mariani, Stefano; Sotelo, Carmen; Velasco, Amaya; Smith, Catherine; Shorten, Marc; Verrez-Bagnis, Véronique; Silva, Helena; Instituto Português do Mar e da Atmosfera, I.P.Project Labelfish – the “Atlantic Network on Genetic Control of Fish and Seafood Labelling and Traceability” is a European project that aims to set up a network of entities with an interest in the use of standardised, innovative analytical techniques to control genetic traceability and labelling of seafood products. Within this project one of the objectives is the analysis of fish traceability and fish labelling in markets of the Atlantic region (Portugal, Spain, France, United Kingdom and Ireland). This report is an overview of the current situation of seafood traceability and fish labelling in the countries of the Atlantic region. Information recorded includes the national and European legislation regulating the seafood chain, fish species identification methods in national legislation, identification of the stakeholders involved, traceability schemes used, transference of information and data elements between stakeholders and finally evaluation of bottlenecks for improved traceability