Measurement of the Λ+c to D0 production ratio in periphera PbPb collisions at √sNN = 5.02 TeV



Aaij, R, Abdelmotteleb, ASW, Abellan Beteta, C, Abudinén, F, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Agapopoulou, C, Aidala, CA
et al (show 1004 more authors) (2023) Measurement of the Λ+c to D0 production ratio in periphera PbPb collisions at √sNN = 5.02 TeV. Journal of High Energy Physics, 2023 (6).

[img] PDF
JHEP06(2023)132.pdf - Open Access published version

Download (851kB) | Preview

Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title><jats:p>We report on a measurement of the <jats:inline-formula><jats:alternatives><jats:tex-math>$$ {\Lambda}_c^{+} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Λ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> </mml:math></jats:alternatives></jats:inline-formula> to <jats:italic>D</jats:italic><jats:sup>0</jats:sup> production ratio in peripheral PbPb collisions at <jats:inline-formula><jats:alternatives><jats:tex-math>$$ \sqrt{s_{\textrm{NN}}} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:msub> <mml:mi>s</mml:mi> <mml:mi>NN</mml:mi> </mml:msub> </mml:msqrt> </mml:math></jats:alternatives></jats:inline-formula> = 5<jats:italic>.</jats:italic>02 TeV with the LHCb detector in the forward rapidity region 2 <jats:italic>&lt; y &lt;</jats:italic> 4<jats:italic>.</jats:italic>5. The <jats:inline-formula><jats:alternatives><jats:tex-math>$$ {\Lambda}_c^{+} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Λ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> </mml:math></jats:alternatives></jats:inline-formula> (<jats:italic>D</jats:italic><jats:sup>0</jats:sup>) hadrons are reconstructed via the decay channel <jats:inline-formula><jats:alternatives><jats:tex-math>$$ {\Lambda}_c^{+} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Λ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> </mml:math></jats:alternatives></jats:inline-formula><jats:italic>→ pK</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup><jats:italic>π</jats:italic><jats:sup>+</jats:sup> (<jats:italic>D</jats:italic><jats:sup>0</jats:sup><jats:italic>→ K</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup><jats:italic>π</jats:italic><jats:sup>+</jats:sup>) for 2 <jats:italic>&lt; p</jats:italic><jats:sub>T</jats:sub><jats:italic>&lt;</jats:italic> 8 GeV/<jats:italic>c</jats:italic> and in the centrality range of about 65–90%. The results show no significant dependence on <jats:italic>p</jats:italic><jats:sub>T</jats:sub>, <jats:italic>y</jats:italic> or the mean number of participating nucleons. They are also consistent with similar measurements obtained by the LHCb collaboration in pPb and Pbp collisions at <jats:inline-formula><jats:alternatives><jats:tex-math>$$ \sqrt{s_{\textrm{NN}}} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:msub> <mml:mi>s</mml:mi> <mml:mi>NN</mml:mi> </mml:msub> </mml:msqrt> </mml:math></jats:alternatives></jats:inline-formula> = 5<jats:italic>.</jats:italic>02 TeV. The data agree well with predictions from PYTHIA 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> = 5 TeV but are in tension with predictions of the Statistical Hadronization model.</jats:p>

Item Type: Article
Uncontrolled Keywords: Charm Physics, Heavy Ion Experiments, Heavy Quark Production, Relativistic Heavy Ion Physics
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 10 Jul 2023 14:58
Last Modified: 16 Sep 2023 11:53
DOI: 10.1007/jhep06(2023)132
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3171590