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Title
Japanese:Measurement of differential production cross-sections for a $Z$ boson in association with $b$-jets in 7 TeV proton-proton collisions with the ATLAS detector 
English:Measurement of differential production cross-sections for a $Z$ boson in association with $b$-jets in 7 TeV proton-proton collisions with the ATLAS detector 
Author
Japanese: 山口洋平.  
English: Youhei Yamaguchi.  
Language English 
Journal/Book name
Japanese: 
English: 
Volume, Number, Page Vol. "10"        pp. "141"
Published date July 2014 
Publisher
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English: 
Conference name
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Conference site
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English: 
Official URL http://inspirehep.net/record/1306294
 
DOI https://doi.org/10.1007/JHEP10(2014)141
Abstract Measurements of differential production cross-sections of a Z boson in association with b-jets in pp collisions at $ \sqrt{s}=7 $ TeV are reported. The data analysed correspond to an integrated luminosity of 4.6 fb$^{−1}$ recorded with the ATLAS detector at the Large Hadron Collider. Particle-level cross-sections are determined for events with a Z boson decaying into an electron or muon pair, and containing b-jets. For events with at least one b-jet, the cross-section is presented as a function of the Z boson transverse momentum and rapidity, together with the inclusive b-jet cross-section as a function of b-jet transverse momentum, rapidity and angular separations between the b-jet and the Z boson. For events with at least two b-jets, the cross-section is determined as a function of the invariant mass and angular separation of the two highest transverse momentum b-jets, and as a function of the Z boson transverse momentum and rapidity. Results are compared to leading-order and next-to-leading-order perturbative QCD

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