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J/ ψ and D0production in √sNN=68.5GeV PbNe collisions

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Peer-reviewed

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Abstract

jats:titleAbstract</jats:title>jats:pThe first measurement of jats:inline-formulajats:alternativesjats:tex-math$${{J}/\psi }$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:miJ</mml:mi> mml:mo/</mml:mo> mml:miψ</mml:mi> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> and jats:inline-formulajats:alternativesjats:tex-math$${{D}} ^0$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:msup mml:mrow mml:miD</mml:mi> </mml:mrow> mml:mn0</mml:mn> </mml:msup> </mml:math></jats:alternatives></jats:inline-formula> production in PbNe collisions by the LHCb experiment in its fixed-target configuration is reported. The production of jats:inline-formulajats:alternativesjats:tex-math$${{J}/\psi }$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:miJ</mml:mi> mml:mo/</mml:mo> mml:miψ</mml:mi> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> and jats:inline-formulajats:alternativesjats:tex-math$${{D}} ^0$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:msup mml:mrow mml:miD</mml:mi> </mml:mrow> mml:mn0</mml:mn> </mml:msup> </mml:math></jats:alternatives></jats:inline-formula> mesons is studied with a beam of lead ions with an energy of 2.5jats:inline-formulajats:alternativesjats:tex-math$$,\text {TeV}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow <mml:mspace /> mml:mtextTeV</mml:mtext> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> per nucleon colliding on gaseous neon targets at rest, corresponding to a nucleon-nucleon centre-of-mass energy of jats:inline-formulajats:alternativesjats:tex-math$$\sqrt{s_{\scriptscriptstyle \text {NN}}} =68.5,\text {GeV} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:msqrt mml:msub mml:mis</mml:mi> mml:mstyle mml:mtextNN</mml:mtext> </mml:mstyle> </mml:msub> </mml:msqrt> mml:mo=</mml:mo> mml:mn68.5</mml:mn> <mml:mspace /> mml:mtextGeV</mml:mtext> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula>. The jats:inline-formulajats:alternativesjats:tex-math$${{J}/\psi }$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:miJ</mml:mi> mml:mo/</mml:mo> mml:miψ</mml:mi> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula>/jats:inline-formulajats:alternativesjats:tex-math$${{D}} ^0$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:msup mml:mrow mml:miD</mml:mi> </mml:mrow> mml:mn0</mml:mn> </mml:msup> </mml:math></jats:alternatives></jats:inline-formula> production cross-section ratio is studied as a function of rapidity, transverse momentum and collision centrality. These data are compared with measurements from jats:inline-formulajats:alternativesjats:tex-math$$p\text {Ne}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:mip</mml:mi> mml:mtextNe</mml:mtext> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> collisions at the same energy and show no difference in the observed jats:inline-formulajats:alternativesjats:tex-math$${{J}/\psi }$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:miJ</mml:mi> mml:mo/</mml:mo> mml:miψ</mml:mi> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> suppression trend when comparing jats:inline-formulajats:alternativesjats:tex-math$$p\text {Ne}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:mip</mml:mi> mml:mtextNe</mml:mtext> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> and PbNe peripheral collisions with PbNe central collisions.</jats:p>

Description

Keywords

5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 5110 Synchrotrons and Accelerators, 51 Physical Sciences

Journal Title

European Physical Journal C

Conference Name

Journal ISSN

1434-6044
1434-6052

Volume Title

83

Publisher

Springer Science and Business Media LLC