Prompt and non-prompt J/ψ production cross sections at midrapidity in proton-proton collisions at √s=5.02 and 13 TeV



Acharya, S, Adamova, D, Adler, A, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, S, Ahn, SU, Ahuja, I
et al (show 1013 more authors) (2022) Prompt and non-prompt J/ψ production cross sections at midrapidity in proton-proton collisions at √s=5.02 and 13 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2022 (3).

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Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title><jats:p>The production of J<jats:italic>/ψ</jats:italic> is measured at midrapidity (<jats:italic>|y| &lt;</jats:italic> 0<jats:italic>.</jats:italic>9) in proton-proton collisions at <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> = 5<jats:italic>.</jats:italic>02 and 13 TeV, through the dielectron decay channel, using the ALICE detector at the Large Hadron Collider. The data sets used for the analyses correspond to integrated luminosities of <jats:inline-formula><jats:alternatives><jats:tex-math>$$ \mathcal{L} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>L</mml:mi> </mml:math></jats:alternatives></jats:inline-formula><jats:sub>int</jats:sub> = 19.4 <jats:italic>±</jats:italic> 0.4 nb<jats:sup><jats:italic>−</jats:italic>1</jats:sup> and <jats:inline-formula><jats:alternatives><jats:tex-math>$$ \mathcal{L} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>L</mml:mi> </mml:math></jats:alternatives></jats:inline-formula><jats:sub>int</jats:sub> = 32.2 <jats:italic>±</jats:italic> 0.5 nb<jats:sup><jats:italic>−</jats:italic>1</jats:sup> at <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> = 5<jats:italic>.</jats:italic>02 and 13 TeV, respectively. The fraction of non-prompt J<jats:italic>/ψ</jats:italic> mesons, i.e. those originating from the decay of beauty hadrons, is measured down to a transverse momentum <jats:italic>p</jats:italic><jats:sub>T</jats:sub> = 2 GeV<jats:italic>/c</jats:italic> (1 GeV<jats:italic>/c</jats:italic>) at <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> = 5<jats:italic>.</jats:italic>02 TeV (13 TeV). The <jats:italic>p</jats:italic><jats:sub>T</jats:sub> and rapidity (<jats:italic>y</jats:italic>) differential cross sections, as well as the corresponding values integrated over <jats:italic>p</jats:italic><jats:sub>T</jats:sub> and <jats:italic>y</jats:italic>, are carried out separately for prompt and non-prompt J<jats:italic>/ψ</jats:italic> mesons. The results are compared with measurements from other experiments and theoretical calculations based on quantum chromodynamics (QCD). The shapes of the <jats:italic>p</jats:italic><jats:sub>T</jats:sub> and <jats:italic>y</jats:italic> distributions of beauty quarks predicted by state-of-the-art perturbative QCD models are used to extrapolate an estimate of the <jats:inline-formula><jats:alternatives><jats:tex-math>$$ \mathrm{b}\overline{\mathrm{b}} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>b</mml:mi> <mml:mover> <mml:mi>b</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:math></jats:alternatives></jats:inline-formula> pair cross section at midrapidity and in the total phase space. The total <jats:inline-formula><jats:alternatives><jats:tex-math>$$ \mathrm{b}\overline{\mathrm{b}} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>b</mml:mi> <mml:mover> <mml:mi>b</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:math></jats:alternatives></jats:inline-formula> cross sections are found to be <jats:inline-formula><jats:alternatives><jats:tex-math>$$ {\sigma}_{\mathrm{b}\overline{\mathrm{b}}} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>σ</mml:mi> <mml:mrow> <mml:mi>b</mml:mi> <mml:mover> <mml:mi>b</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:mrow> </mml:msub> </mml:math></jats:alternatives></jats:inline-formula> = 541 <jats:italic>±</jats:italic> 45 (stat<jats:italic>.</jats:italic>) <jats:italic>±</jats:italic> 69 <jats:inline-formula><jats:alternatives><jats:tex-math>$$ {\left(\mathrm{syst}.\right)}_{-12}^{+10} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mfenced> <mml:mrow> <mml:mtext>syst</mml:mtext> <mml:mo>.</mml:mo> </mml:mrow> </mml:mfenced> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>12</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> <mml:mn>10</mml:mn> </mml:mrow> </mml:msubsup> </mml:math></jats:alternatives></jats:inline-formula> (extr<jats:italic>.</jats:italic>) <jats:italic>μ</jats:italic>b and <jats:inline-formula><jats:alternatives><jats:tex-math>$$ {\sigma}_{\mathrm{b}\overline{\mathrm{b}}} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>σ</mml:mi> <mml:mrow> <mml:mi>b</mml:mi> <mml:mover> <mml:mi>b</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:mrow> </mml:msub> </mml:math></jats:alternatives></jats:inline-formula> = 218<jats:italic>±</jats:italic>37 (stat<jats:italic>.</jats:italic>)<jats:italic>±</jats:italic>31 <jats:inline-formula><jats:alternatives><jats:tex-math>$$ {\left(\mathrm{syst}.\right)}_{-9.1}^{+8.2} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mfenced> <mml:mrow> <mml:mtext>syst</mml:mtext> <mml:mo>.</mml:mo> </mml:mrow> </mml:mfenced> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>9.1</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> <mml:mn>8.2</mml:mn> </mml:mrow> </mml:msubsup> </mml:math></jats:alternatives></jats:inline-formula> (extr<jats:italic>.</jats:italic>) <jats:italic>μ</jats:italic>b at <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 and 5.02 TeV, respectively. The value obtained from the combination of ALICE and LHCb measurements in pp collisions at <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 also provided.</jats:p>

Item Type: Article
Uncontrolled Keywords: Hadron-Hadron Scattering
Depositing User: Symplectic Admin
Date Deposited: 11 Oct 2022 14:27
Last Modified: 14 Oct 2023 18:55
DOI: 10.1007/JHEP03(2022)190
Open Access URL: https://link.springer.com/article/10.1007/JHEP03(2...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3165381