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First measurement of Ξc 0 production in pp collisions at s=7 TeV
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First measurement of Ξc 0 production in pp collisions at s=7 TeV

S. Acharya, D. Adamová, J. Adolfsson, M.M. Aggarwal, G. Aglieri Rinella, M. Agnello, N. Agrawal, Z. Ahammed, S.U. Ahn, S. Aiola, …
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 卷.781, 頁碼.8-19
06/2018
DOI: https://doi.org/10.1016/j.physletb.2018.03.061

摘要

Nuclear and High Energy Physics
The production of the charm-strange baryon Ξ <sub>c</sub> <sup>0</sup> is measured for the first time at the LHC via its semileptonic decay into eΞ−+ν <sub>e</sub> in pp collisions at s=7 TeV with the ALICE detector. The transverse momentum (p <sub>T</sub> ) differential cross section multiplied by the branching ratio is presented in the interval 1<p <sub>T</sub> <8 GeV/c at mid-rapidity, |y|<0.5. The transverse momentum dependence of the Ξ <sub>c</sub> <sup>0</sup> baryon production relative to the D <sup>0</sup> meson production is compared to predictions of event generators with various tunes of the hadronisation mechanism, which are found to underestimate the measured cross-section ratio.

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