Measurement of the inclusive and dijet cross-sections of b-jets in pp collisions at root s=7 TeV with the ATLAS detector

G. Aad...[et al.]; B. Abbott; J. Abdallah; Mogens Dam; Jørgen Beck Hansen; Jørn Dines Hansen; John Renner Hansen; Peter Henrik Hansen; Esben Bryndt Klinkby; Morten Dam Jørgensen; Troels Christian Petersen; Stefania Xella; Nele Maria Philomena Boelaert; Thomas Høvring Kittelmann

doi:10.1140/epjc/s10052-011-1846-4

Measurement of the inclusive and dijet cross-sections of b-jets in pp collisions at root s=7 TeV with the ATLAS detector

G. Aad...[et al.], B. Abbott, J. Abdallah, Mogens Dam, Jørgen Beck Hansen, Jørn Dines Hansen, John Renner Hansen, Peter Henrik Hansen, Esben Bryndt Klinkby, Morten Dam Jørgensen, Troels Christian Petersen, Stefania Xella, Nele Maria Philomena Boelaert, Thomas Høvring Kittelmann

Experimental Particle Physics

49 Citations (Scopus)

Abstract

The inclusive and dijet production cross-sections have been measured for jets containing b-hadrons (b-jets) i√n proton–proton collisions at a centre-of-mass energy of 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<pT < 400 GeV and rapidity in the range |y| < 2.1. The bb-dijet cross-section is measured as a function of the dijet invariant mass in the range 110 < mjj < 760 GeV, the azimuthal angle difference between the two jets and the angular variable χ in two dijet mass regions. The results are compared with next-to-leading-order QCD predictions. Good agreement is observed between the measured crosssections and the predictions obtained using POWHEG + Pythia. MC@NLO + Herwig shows good agreement with the measured bb-dijet cross-section. However, it does not reproduce the measured inclusive cross-section well, particularly for central b-jets with large transverse momenta.

Original language	English
Journal	European Physical Journal C
Volume	71
Issue number	12
Pages (from-to)	1846
ISSN	1434-6044
DOIs	https://doi.org/10.1140/epjc/s10052-011-1846-4
Publication status	Published - 1 Dec 2011

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Aad...[et al.], G., Abbott, B., Abdallah, J., Dam, M., Hansen, J. B., Hansen, J. D., Hansen, J. R., Hansen, P. H., Klinkby, E. B., Jørgensen, M. D., Petersen, T. C., Xella, S., Boelaert, N. M. P., & Kittelmann, T. H. (2011). Measurement of the inclusive and dijet cross-sections of b-jets in pp collisions at root s=7 TeV with the ATLAS detector. European Physical Journal C, 71(12), 1846. https://doi.org/10.1140/epjc/s10052-011-1846-4

Aad...[et al.], G, Abbott, B, Abdallah, J, Dam, M , Hansen, JB , Hansen, JD , Hansen, JR , Hansen, PH, Klinkby, EB, Jørgensen, MD, Petersen, TC , Xella, S, Boelaert, NMP & Kittelmann, TH 2011, 'Measurement of the inclusive and dijet cross-sections of b-jets in pp collisions at root s=7 TeV with the ATLAS detector', European Physical Journal C, vol. 71, no. 12, pp. 1846. https://doi.org/10.1140/epjc/s10052-011-1846-4

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abstract = "The inclusive and dijet production cross-sections have been measured for jets containing b-hadrons (b-jets) i√n proton–proton collisions at a centre-of-mass energy of 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",

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AU - Abbott, B.

AU - Abdallah, J.

AU - Dam, Mogens

AU - Hansen, Jørgen Beck

AU - Hansen, Jørn Dines

AU - Hansen, John Renner

AU - Hansen, Peter Henrik

AU - Klinkby, Esben Bryndt

AU - Jørgensen, Morten Dam

AU - Petersen, Troels Christian

AU - Xella, Stefania

AU - Boelaert, Nele Maria Philomena

AU - Kittelmann, Thomas Høvring

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AB - The inclusive and dijet production cross-sections have been measured for jets containing b-hadrons (b-jets) i√n proton–proton collisions at a centre-of-mass energy of 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

U2 - 10.1140/epjc/s10052-011-1846-4

DO - 10.1140/epjc/s10052-011-1846-4

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JO - The European Physical Journal C: Particles and Fields

JF - The European Physical Journal C: Particles and Fields

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ER -

Measurement of the inclusive and dijet cross-sections of b-jets in pp collisions at root s=7 TeV with the ATLAS detector

Abstract

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