Measurement of the prompt J/\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\psi $$\end{document}ψ pair production cross-section in pp collisions at \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{
The production of two prompt \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$J/\psi $$\end{document} J / ψ mesons, eac...
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Published in | The European physical journal. C, Particles and fields Vol. 77; no. 2 |
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Main Authors | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Berlin/Heidelberg
Springer Berlin Heidelberg
01.01.2017
|
Subjects | |
Online Access | Get full text |
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Summary: | The production of two prompt
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\begin{document}$$J/\psi $$\end{document}
J
/
ψ
mesons, each with transverse momenta
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\begin{document}$$p_{\mathrm {T}}>8.5$$\end{document}
p
T
>
8.5
GeV and rapidity
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\begin{document}$$|y| < 2.1$$\end{document}
|
y
|
<
2.1
, is studied using a sample of proton-proton collisions at
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\begin{document}$$\sqrt{s} = 8$$\end{document}
s
=
8
TeV, corresponding to an integrated luminosity of 11.4 fb
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\begin{document}$$^{-1}$$\end{document}
-
1
collected in 2012 with the ATLAS detector at the LHC. The differential cross-section, assuming unpolarised
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J
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production, is measured as a function of the transverse momentum of the lower-
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\begin{document}$$p_{\mathrm {T}}$$\end{document}
p
T
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ψ
meson, di-
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\begin{document}$$J/\psi $$\end{document}
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ψ
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\begin{document}$$p_{\mathrm {T}}$$\end{document}
p
T
and mass, the difference in rapidity between the two
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\begin{document}$$J/\psi $$\end{document}
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/
ψ
mesons, and the azimuthal angle between the two
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\begin{document}$$J/\psi $$\end{document}
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mesons. The fraction of prompt pair events due to double parton scattering is determined by studying kinematic correlations between the two
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mesons. The total and double parton scattering cross-sections are compared with predictions. The effective cross-section of double parton scattering is measured to be
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\begin{document}$$\sigma _{\mathrm {eff}} = 6.3 \pm 1.6 \mathrm {(stat)} \pm 1.0 \mathrm {(syst)}$$\end{document}
σ
eff
=
6.3
±
1.6
(
stat
)
±
1.0
(
syst
)
mb. |
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ISSN: | 1434-6044 1434-6052 |
DOI: | 10.1140/epjc/s10052-017-4644-9 |