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• W3036690913 abstract "Abstract In the paper we develop, in the CGC approach, a new mechanism for quarkonia production in events with high multiplicity of the soft produced particles. In this mechanism both $$J/varPsi $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>Ψ</mml:mi></mml:mrow></mml:math> and soft hadrons are produced at short distances $$r, propto ,1/Q_s$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>r</mml:mi><mml:mspace /><mml:mo>∝</mml:mo><mml:mspace /><mml:mn>1</mml:mn><mml:mo>/</mml:mo><mml:msub><mml:mi>Q</mml:mi><mml:mi>s</mml:mi></mml:msub></mml:mrow></mml:math> , where $$Q_s$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mi>Q</mml:mi><mml:mi>s</mml:mi></mml:msub></mml:math> is the saturation scale, which is considered to be proportional to the multiplicity of soft hadrons. Using this approach, we analyze the vigorously growing multiplicity dependence of quarkonia production, which was recently discovered by the STAR and ALICE collaborations. We demonstrate that this result presents a strong evidence in favor of multigluon fusion mechanisms of the quarkonia states. We analyze in detail the contribution of the 3-gluon fusion mechanism and demonstrate that it describes correctly all the available experimental data on the multiplicity dependence of $$J/psi $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi></mml:mrow></mml:math> meson production. We also make predictions for other quarkonia states, such as $$psi (2S)$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>ψ</mml:mi><mml:mo>(</mml:mo><mml:mn>2</mml:mn><mml:mi>S</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:math> and $$varUpsilon (1S)$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>Υ</mml:mi><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mi>S</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:math> , and find that the multiplicity dependence of these states should be similar to that of the $$J/psi $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi></mml:mrow></mml:math> meson. Finally, we discuss an experimental setup in which the very strong multiplicity dependence could be observed. This observation would be a strong evidence in favor of the CGC approach." @default.
• W3036690913 created "2020-06-25" @default.
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• W3036690913 date "2020-06-01" @default.
• W3036690913 modified "2023-10-10" @default.
• W3036690913 title "Multiplicity dependence of quarkonia production in the CGC approach" @default.
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• W3036690913 doi "https://doi.org/10.1140/epjc/s10052-020-8086-4" @default.
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