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). 190-. ISSN 1029-8479, 1029-8479

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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: 06 Dec 2024 21:09
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