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First measurement of $\Lambda \mathrm{c}^{+}$ production down to $p \mathrm{T} = 0$ in pp and p-Pb collisions at $\sqrt{s \mathrm{NN}} = 5.02$ TeV by ALICE Collaboration is a scholarly article available to read on EtoBox.

What is First measurement of $\Lambda \mathrm{c}^{+}$ production down to $p \mathrm{T} = 0$ in pp and p-Pb collisions at $\sqrt{s \mathrm{NN}} = 5.02$ TeV about?

The production of prompt $\mathrm {\Lambda_{c}^{+}}$ baryons has been measured at midrapidity in the transverse momentum interval $0<p_{\rm T}<1$ GeV/$c$ for the first time, in pp and p-Pb collisions at a centre-of-mass energy per nucleon-nucleon collision $\sqrt{s_\mathrm{NN}} = 5.02$ TeV. The measurement was performed in the decay channel ${\rm \Lambda_{c}^{+}\to p K^{0}_{S}}$ by applying new decay reconstruction techniques using a Kalman-Filter vertexing algorithm and adopting a machine-learning approach for the candidate selection. The $p_{\rm T}$-integrated $\mathrm {\Lambda_{c}^{+}}$ production cross sections in both collision systems were determined and used along with the measured yields in Pb-Pb collisions to compute the $p_{\rm T}$-integrated nuclear modification factors $R_{\rm pPb}$ and $R_\mathrm{AA}$ of $\mathrm{\Lambda_{c}^{+}}$ baryons, which are compared to model calculations that consider nuclear modification of the parton distribution functions. The $\mathrm{\Lambda_{c}^{+}/D^0}$ baryon-to-meson yield ratio is reported for pp and p-Pb collisions. Comparisons with models that include modified hadronisation processes are presented, and the implications of the resul

Author

ALICE Collaboration

Published

2022

Language

EN