Determination of the Strange-Quark Density of the Proton from ATLAS Measurements of the W¿l¿ and Z¿ll Cross Sections

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

doi:10.1103/PhysRevLett.109.012001

Determination of the Strange-Quark Density of the Proton from ATLAS Measurements of the W¿l¿ and Z¿ll Cross Sections

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

117 Citations (Scopus)

Abstract

A QCD analysis is reported of ATLAS data on inclusive W^± and Z boson production in pp collisions at the LHC, jointly with ep deep-inelastic scattering data from HERA. The ATLAS data exhibit sensitivity to the light quark sea composition and magnitude at Bjorken x∼0.01. Specifically, the data support the hypothesis of a symmetric composition of the light quark sea at low x. The ratio of the strange-to-down sea quark distributions is determined to be 1.00-0.28+0.25 at absolute four-momentum transfer squared Q2=1.9GeV2 and x=0.023.

Original language	English
Journal	Physical Review Letters
Volume	109
Issue number	1
Pages (from-to)	012201
Number of pages	17
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.109.012001
Publication status	Published - 5 Jul 2012

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Aad, G., Boelaert, N. M. P., Dam, M., Hansen, J. R., Hansen, J. B., Hansen, P. H., Hansen, J. D., Heisterkamp, S. J. F., Jørgensen, M. D., Mehlhase, S., Klinkby, E. B., Petersen, T. C., Nilsson, B. S., Løvschall-Jensen, A. E., & Xella, S. (2012). Determination of the Strange-Quark Density of the Proton from ATLAS Measurements of the W¿l¿ and Z¿ll Cross Sections. Physical Review Letters, 109(1), 012201. https://doi.org/10.1103/PhysRevLett.109.012001

Aad, G, Boelaert, NMP, Dam, M , Hansen, JR , Hansen, JB , Hansen, PH , Hansen, JD, Heisterkamp, SJF, Jørgensen, MD, Mehlhase, S, Klinkby, EB, Petersen, TC, Nilsson, BS, Løvschall-Jensen, AE & Xella, S 2012, 'Determination of the Strange-Quark Density of the Proton from ATLAS Measurements of the W¿l¿ and Z¿ll Cross Sections', Physical Review Letters, vol. 109, no. 1, pp. 012201. https://doi.org/10.1103/PhysRevLett.109.012001

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title = "Determination of the Strange-Quark Density of the Proton from ATLAS Measurements of the W¿l¿ and Z¿ll Cross Sections",

abstract = "A QCD analysis is reported of ATLAS data on inclusive W± and Z boson production in pp collisions at the LHC, jointly with ep deep-inelastic scattering data from HERA. The ATLAS data exhibit sensitivity to the light quark sea composition and magnitude at Bjorken x∼0.01. Specifically, the data support the hypothesis of a symmetric composition of the light quark sea at low x. The ratio of the strange-to-down sea quark distributions is determined to be 1.00-0.28+0.25 at absolute four-momentum transfer squared Q2=1.9GeV2 and x=0.023.",

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AU - Aad, G.

AU - Boelaert, Nele Maria Philomena

AU - Dam, Mogens

AU - Hansen, John Renner

AU - Hansen, Jørgen Beck

AU - Hansen, Peter Henrik

AU - Hansen, Jørn Dines

AU - Heisterkamp, Simon Johann Franz

AU - Jørgensen, Morten Dam

AU - Mehlhase, Sascha

AU - Klinkby, Esben Bryndt

AU - Petersen, Troels Christian

AU - Nilsson, Björn Stefan

AU - Løvschall-Jensen, Ask Emil

AU - Xella, Stefania

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N2 - A QCD analysis is reported of ATLAS data on inclusive W± and Z boson production in pp collisions at the LHC, jointly with ep deep-inelastic scattering data from HERA. The ATLAS data exhibit sensitivity to the light quark sea composition and magnitude at Bjorken x∼0.01. Specifically, the data support the hypothesis of a symmetric composition of the light quark sea at low x. The ratio of the strange-to-down sea quark distributions is determined to be 1.00-0.28+0.25 at absolute four-momentum transfer squared Q2=1.9GeV2 and x=0.023.

AB - A QCD analysis is reported of ATLAS data on inclusive W± and Z boson production in pp collisions at the LHC, jointly with ep deep-inelastic scattering data from HERA. The ATLAS data exhibit sensitivity to the light quark sea composition and magnitude at Bjorken x∼0.01. Specifically, the data support the hypothesis of a symmetric composition of the light quark sea at low x. The ratio of the strange-to-down sea quark distributions is determined to be 1.00-0.28+0.25 at absolute four-momentum transfer squared Q2=1.9GeV2 and x=0.023.

U2 - 10.1103/PhysRevLett.109.012001

DO - 10.1103/PhysRevLett.109.012001

M3 - Journal article

SN - 0031-9007

VL - 109

SP - 012201

JO - Physical Review Letters

JF - Physical Review Letters

IS - 1

ER -

Determination of the Strange-Quark Density of the Proton from ATLAS Measurements of the W¿l¿ and Z¿ll Cross Sections

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