Multiplicity dependence of Γ production at forward rapidity in pp collisions at √s=13 TeV

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초록

The measurement of Gamma(1S), Gamma(2S), and Gamma(3S) yields as a function of the charged-particle multiplicity density, dN(ch)/d eta, using the ALICE experiment at the LHC, is reported in pp collisions at root s = 13 TeV. The Gamma meson yields are measured at forward rapidity (2.5 < y < 4) in the dimuon decay channel, whereas the charged-particle multiplicity is defined at central rapidity (vertical bar eta vertical bar < 1). Both quantities are divided by their average value in minimum bias events to compute the self-normalized quantities. The increase of the self-normalized Gamma(1S), Gamma(2S), and Gamma(3S) yields is found to be compatible with a linear scaling with the self-normalized dN(ch)/d eta, within the uncertainties. The self-normalized yield ratios of excited-to-ground Gamma states are compatible with unity within uncertainties. Similarly, the measured double ratio of the self-normalized Gamma(1S) to the self-normalized J/psi yields, both measured at forward rapidity, is compatible with unity for self-normalized charged-particle multiplicities beyond one. The measurements are compared with theoretical predictions incorporating initial or final state effects.

키워드

CHARGED-PARTICLE MULTIPLICITYNONPROMPT J/PSI PRODUCTIONPROTON-PROTON COLLISIONSPB-PB COLLISIONSCHARMONIUM SUPPRESSIONPSI(2S) SUPPRESSIONPROMPT
제목
Multiplicity dependence of Γ production at forward rapidity in pp collisions at √s=13 TeV
저자
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DOI
10.1016/j.nuclphysb.2024.116786
발행일
2025-02
유형
Article
저널명
Nuclear Physics B
1011