P. Mastrandea
University of Bologna
1 Papers
P. Mastrandea is an academic researcher from University of Bologna. The author has an hindex of 1, co-authored 1 publications.
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Papers
Measurement of the tt¯W and tt¯Z production cross sections in pp collisions at √s = 8 TeV with the ATLAS detector
Georges Aad,S. Albrand,Johann Collot,Sabine Crépé-Renaudin,P. A. Delsart,Carolina Gabaldon,Marie-Hélène Genest,J-Y. Hostachy,Fabienne Ledroit-Guillon,Annick Lleres,Arnaud Lucotte,Fairouz Malek,Caterina Monini,Jan Stark,Benjamin Trocmé,Mengqing Wu,G. Rahal,Zuzana Barnovska,Nicolas Berger,Marco Delmastro,L. Di Ciaccio,Sabine Elles,Tetiana Hryn'ova,Stéphane Jézéquel,Iro Koletsou,Remi Lafaye,Jessica Levêque,P. Mastrandea,G. Sauvage,Emmanuel Sauvan,Olivier Simard,T. Todorov,Elena Yatsenko,Isabelle Wingerter-Seez,Mohamad Kassem Ayoub,Ahmed Bassalat,Cyril Becot,Sebastien Binet,Claire Bourdarios,David Delgove,J-B. de Vivie De Regie,Laurent Duflot,Marc Escalier,Louis Fayard,Daniel Fournier,Evangelos Leonidas Gkougkousis,J-F Grivaz,Thibault Guillemin,Faten Hariri,Sophie Henrot-Versille,Julius Hrivnac,Lydia Iconomidou-Fayard,Marumi Kado,Abdenour Lounis,Nikola Makovec,Nicolas Morange,Clara Nellist,Pierre Petroff,Luc Poggioli,Patrick Puzo,A. Renaud,David Rousseau,Grigori Rybkin,Arthur Schaffer,Estelle Scifo,Laurent Serin,Stefan Simion,Reisaburo Tanaka,Dirk Zerwas,Z. P. Zhang,Yongke Zhao,Yongke Zhao,Lion Alio,Marlon Barbero,Yann Coadou,Cristinel Diaconu,Sara Diglio,Fares Djama,O. Duccu,Lorenzo Feligioni,Jun Gao,Jun Gao,Gregory David Hallewell,Fabrice Hubaut,Sebastien Jonathan Kahn,E. B. F. G. Knoops,E. Le Guirriec,Jiurong Liu,K. Liu,Daniele Madaffari,Kazuya Mochizuki,Emmanuel Monnier,Steve Muanza,Yoshikazu Nagai,Elemer Nagy,Pascal Pralavorio,Alexandre Rozanov,Thomas Serre,Mossadek Talby,R. E. Ticse Torres,E. Tiouchichine,Sylvain Tisserant,Jozsef Toth,Francois Touchard,Laurent Vacavant,Djamel Eddine Boumediene,Emmanuel Busato,David Calvet,Samuel Calvet,Julien Donini,Emmanuelle Dubreuil,Geoffrey Gilles,Ph Gris,Hongbo Liao,R. Madar,Dominique Pallin,S. M. Romano Saez,Claudio Santoni,Dorian Simon,T. Theveneaux-Pelzer,Francois Vazeille +120 more
Abstract: The production cross sections of top-quark pairs in association with massive vector bosons have been measured using data from pp collisions at root s = 8 TeV. The dataset corresponds to an integrated luminosity of 20.3 fb(-1) collected by the ATLAS detector in 2012 at the LHC. Final states with two, three or four leptons are considered. A fit to the data considering the t (t) over barW and t (t) over barZ processes simultaneously yields a significance of 5.0 sigma (4.2 sigma) over the background-only hypothesis for t (t) over barW (t (t) over barZ) production. The measured cross sections are sigma(t (t) over barW) = 369(-91)(+100) fb and sigma(t (t) over barZ) = 176(-52)(+58) fb. The background-only hypothesis with neither t (t) over barW nor t (t) over barZ production is excluded at 7.1 sigma. All measurements are consistent with next-to-leading-order calculations for the t (t) over barW and t (t) over barZ processes.