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

G. Aad...[et al.]; Mogens Dam; Jørgen Beck Hansen; Peter Henrik Hansen; John Renner Hansen; Jørn Dines Hansen; Simon Johann Franz Heisterkamp; Morten Dam Jørgensen; Esben Bryndt Klinkby; Sascha Mehlhase; Nele Maria Philomena Boelaert; Björn Stefan Nilsson; Troels Christian Petersen; Stefania Xella

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

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

G. Aad...[et al.], Mogens Dam, Jørgen Beck Hansen, Peter Henrik Hansen, John Renner Hansen, Jørn Dines Hansen, Simon Johann Franz Heisterkamp, Morten Dam Jørgensen, Esben Bryndt Klinkby, Sascha Mehlhase, Nele Maria Philomena Boelaert, Björn Stefan Nilsson, Troels Christian Petersen, Stefania Xella

49 Citationer (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.

Originalsprog	Engelsk
Tidsskrift	European Physical Journal C
Vol/bind	71
Sider (fra-til)	1846
Antal sider	21
ISSN	1434-6044
DOI	https://doi.org/10.1140/epjc/s10052-011-1846-4
Status	Udgivet - 28 dec. 2011

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10.1140/epjc/s10052-011-1846-4

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

Aad...[et al.], G, Dam, M , Hansen, JB , Hansen, PH , Hansen, JR , Hansen, JD, Heisterkamp, SJF, Jørgensen, MD, Klinkby, EB, Mehlhase, S, Boelaert, NMP, Nilsson, BS, Petersen, TC & Xella, S 2011, 'Measurement of the inclusive and dijet cross-sections of b-jets in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector', European Physical Journal C, bind 71, s. 1846. https://doi.org/10.1140/epjc/s10052-011-1846-4

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title = "Measurement of the inclusive and dijet cross-sections of b-jets in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector",

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",

author = "{Aad...[et al.]}, G. and Mogens Dam and Hansen, {J{\o}rgen Beck} and Hansen, {Peter Henrik} and Hansen, {John Renner} and Hansen, {J{\o}rn Dines} and Heisterkamp, {Simon Johann Franz} and J{\o}rgensen, {Morten Dam} and Klinkby, {Esben Bryndt} and Sascha Mehlhase and Boelaert, {Nele Maria Philomena} and Nilsson, {Bj{\"o}rn Stefan} and Petersen, {Troels Christian} and Stefania Xella",

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AU - Aad...[et al.], G.

AU - Dam, Mogens

AU - Hansen, Jørgen Beck

AU - Hansen, Peter Henrik

AU - Hansen, John Renner

AU - Hansen, Jørn Dines

AU - Heisterkamp, Simon Johann Franz

AU - Jørgensen, Morten Dam

AU - Klinkby, Esben Bryndt

AU - Mehlhase, Sascha

AU - Boelaert, Nele Maria Philomena

AU - Nilsson, Björn Stefan

AU - Petersen, Troels Christian

AU - Xella, Stefania

PY - 2011/12/28

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N2 - 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

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

M3 - Journal article

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

Abstract

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