Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 71, Issue 12, Pages -Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-011-1846-4
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Funding
- ANPCyT, Argentina
- YerPhI, Armenia
- ARC, Australia
- BMWF, Austria
- ANAS, Azerbaijan
- SSTC, Belarus
- CNPq
- FAPESP, Brazil
- NSERC, NRC and CFI, Canada
- CERN
- CONICYT, Chile
- CAS, MOST and NSFC, China
- COLCIEN-CIAS, Colombia
- MSMT CR, MPO CR and VSC CR, Czech Republic
- DNRF, DNSRC and Lundbeck Foundation, Denmark
- ARTEMIS, European Union
- IN2P3-CNRS, CEA-DSM/IRFU, France
- GNAS, Georgia
- BMBF, DFG, HGF, MPG and AvH Foundation, Germany
- GSRT, Greece
- ISF, MINERVA, GIF, DIP and Benoziyo Center, Israel
- INFN, Italy
- MEXT and JSPS, Japan
- CNRST, Morocco
- FOM and NWO, Netherlands
- RCN, Norway
- MNiSW, Poland
- GRICES and FCT, Portugal
- MERYS (MECTS), Romania
- MES of Russia and ROSATOM, Russian Federation
- JINR
- MSTD, Serbia
- MSSR, Slovakia
- ARRS and MVZT, Slovenia
- DST/NRF, South Africa
- MICINN, Spain
- SRC and Wallenberg Foundation, Sweden
- SER, SNSF and Cantons of Bern and Geneva, Switzerland
- NSC, Taiwan
- TAEK, Turkey
- STFC
- Royal Society
- Leverhulme Trust, United Kingdom
- DOE and NSF, United States of America
- STFC [ST/G502320/1, ST/I006080/1, ST/H001093/1, ST/H001026/1, ST/F007337/1, PP/E003699/2, ST/H001069/1, ST/I003525/1, ST/I005803/1, PP/E003087/1, ST/I000186/1, ST/J002798/1, ST/H001093/2, ST/K00073X/1, PP/E003699/1, ST/H001026/2, PP/E000347/1, PP/E002838/1] Funding Source: UKRI
- ICREA Funding Source: Custom
- Science and Technology Facilities Council [PP/E000347/1, ST/H001093/1, ST/I005803/1 GRIDPP, ST/I003525/1, ST/I005803/1, ST/H001026/2, ST/H001026/1, PP/E003699/1, ST/G502320/1, ST/H001093/2, PP/E002838/1, ATLAS, ST/H001069/1, ST/J002798/1, ST/F007337/1, ST/K00073X/1, GRIDPP, PP/E003699/2, PP/E003087/1, ST/I006080/1, ST/I000186/1] Funding Source: researchfish
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The inclusive and dijet production cross-sections have been measured for jets containing b-hadrons (b-jets) in proton-proton collisions at a centre-of-mass energy of root s = 7 TeV, using the ATLAS detector at the LHC. The measurements use data corresponding to an integrated luminosity of 34 pb(-1). The b-jets are identified using either a lifetime-based method, where secondary decay vertices of b-hadrons in jets are reconstructed using information from the tracking detectors, or a muon-based method where the presence of a muon is used to identify semileptonic decays of b-hadrons inside jets. The inclusive b-jet cross-section is measured as a function of transverse momentum in the range 20 < p(T) < 400 GeV and rapidity in the range vertical bar y vertical bar < 2.1. The b<(b)over bar>-dijet cross-section is measured as a function of the dijet invariant mass in the range 110 < m(jj) < 760 GeV, the azimuthal angle difference between the two jets and the angular variable chi in two dijet mass regions. The results are compared with next-to-leading-order QCD predictions. Good agreement is observed between the measured cross-sections and the predictions obtained using POWHEG + Pythia. MC@NLO + Herwig shows good agreement with the measured b (b) over bar -dijet cross-section. However, it does not reproduce the measured inclusive cross-section well, particularly for central b-jets with large transverse momenta.
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