Measurement of the production cross sections for a Z boson and one or more b jets in pp collisions at sqrt(s) = 7 TeV
- CMS Collaboration
- Chatrchyan, Serguei
- Bachmair, Felix
- Bäni, Lukas
- Bianchini, Lorenzo
- Bortignon, Pierluigi
- Buchmann, Marco A.
- Casal, Bruno
- Chanon, Nicolas
- Deisher, Amanda
- Dissertori, Günther
- Dittmar, Michael
- Donegà, Mauro
- Dünser, Marc
- Eller, Philipp
- Freudenreich, Klaus
- Grab, Christoph
- Hits, Dmitry
- Lecomte, Pierre
- Lustermann, Werner
- Mangano, Boris
- Marini, Andrea C.
- Martinez Ruiz del Arbol, Pablo
- Meister, Daniel
- Mohr, Niklas
- Moortgat, Filip
- Nägeli, Christoph
- Nef, Pascal
- Nessi-Tedaldi, Francesca
- Pandolfi, Francesco
- Pape, Luc
- Pauss, Felicitas
- Peruzzi, Marco
- Ronga, Frédéric J.
- Rossini, Marco
- Sala, Leonardo
- Sanchez, Ann-Karin
- Starodumov, Andrey
- Stieger, Benjamin
- Takahashi, Maiko
- Tauscher, Ludwig
- Thea, Alessandro
- Theofilatos, Konstantinos
- Treille, Daniel
- Urscheler, Christina
- Wallny, Rainer
- Weber, Hannsjörg A.
- et al.
DOIAbstract
The production of a Z boson, decaying into two leptons and produced in association with one or more b jets, is studied using proton-proton collisions delivered by the LHC at a centre-of-mass energy of 7 TeV. The data were recorded in 2011 with the CMS detector and correspond to an integrated luminosity of 5 fb−1. The Z(ℓℓ) + b-jets cross sections (where ℓℓ = μμ or ee) are measured separately for a Z boson produced with exactly one b jet and with at least two b jets. In addition, a cross section ratio is extracted for a Z boson produced with at least one b jet, relative to a Z boson produced with at least one jet. The measured cross sections are compared to various theoretical predictions, and the data favour the predictions in the five-flav...
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