Associated production of prompt J/ψ and Υ mesons in pp collisions at $$ \sqrt{s} $$ = 13 TeV



Aaij, R, Abdelmotteleb, ASW, Abellan Beteta, C, Abudinén, F, Ackernley, T, Adeva, B, Adinolfi, M, Adlarson, P, Afsharnia, H, Agapopoulou, C
et al (show 1053 more authors) (2023) Associated production of prompt J/ψ and Υ mesons in pp collisions at $$ \sqrt{s} $$ = 13 TeV. Journal of High Energy Physics, 2023 (8). 93-.

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Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title><jats:p>The associated production of prompt <jats:italic>J/ψ</jats:italic> and <jats:italic>Υ</jats:italic> mesons in <jats:italic>pp</jats:italic> collisions at a centre-of-mass energy of <jats:inline-formula><jats:alternatives><jats:tex-math>$$ \sqrt{s} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> </mml:math></jats:alternatives></jats:inline-formula> = 13 TeV is studied using LHCb data, corresponding to an integrated luminosity of 4 fb<jats:sup><jats:italic>−</jats:italic>1</jats:sup>. The measurement is performed for <jats:italic>J/ψ</jats:italic> (<jats:italic>Υ</jats:italic>) mesons with a transverse momentum <jats:italic>p</jats:italic><jats:sub>T</jats:sub><jats:italic>&lt;</jats:italic> 10 (30) GeV/<jats:italic>c</jats:italic> in the rapidity range 2<jats:italic>.</jats:italic>0 <jats:italic>&lt; y &lt;</jats:italic> 4<jats:italic>.</jats:italic>5. In this kinematic range, the cross-section of the associated production of prompt <jats:italic>J/ψ</jats:italic> and <jats:italic>Υ</jats:italic>(1<jats:italic>S</jats:italic>) mesons is measured to be 133 ± 22 ± 7 ± 3 pb, with a significance of 7<jats:italic>.</jats:italic>9 <jats:italic>σ</jats:italic>, and that of prompt <jats:italic>J/ψ</jats:italic> and <jats:italic>Υ</jats:italic>(2<jats:italic>S</jats:italic>) mesons to be 76 ± 21 ± 4 ± 7 pb, with a significance of 4<jats:italic>.</jats:italic>9 <jats:italic>σ</jats:italic>. The first uncertainty is statistical, the second systematic, and the third due to uncertainties on the used branching fractions. This is the first observation of the associated production of <jats:italic>J/ψ</jats:italic> and <jats:italic>Υ</jats:italic>(1<jats:italic>S</jats:italic>) in proton-proton collisions. Differential cross-sections are measured as functions of variables that are sensitive to kinematic correlations between the <jats:italic>J/ψ</jats:italic> and <jats:italic>Υ</jats:italic>(1<jats:italic>S</jats:italic>) mesons. The effective cross-sections of the associated production of prompt <jats:italic>J/ψ</jats:italic> and <jats:italic>Υ</jats:italic> mesons are obtained and found to be compatible with measurements using other particle productions.</jats:p>

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 4902 Mathematical Physics, 49 Mathematical Sciences, 51 Physical Sciences
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 02 Oct 2023 15:34
Last Modified: 20 Jun 2024 21:48
DOI: 10.1007/jhep08(2023)093
Open Access URL: https://doi.org/10.1007/JHEP08(2023)093
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3173324