Prompt $\Lambda^+_c$ production in $p\mathrm{Pb}$ collisions at $\sqrt{s_{NN}} = 5.02$ TeV

TL;DR

This paper reports measurements of $\Lambda^+ ext{_c}$ baryon production in proton-lead collisions at 5.02 TeV, providing insights into charm baryon production and nuclear effects at high energies.

Contribution

It presents the first detailed differential cross-section and forward-backward ratio measurements of $\Lambda^+ ext{_c}$ in pPb collisions at this energy, comparing with theoretical models.

Findings

Measured differential cross-sections for $\Lambda^+ ext{_c}$ production.

Reported the forward-backward production ratio.

Compared results with NLO calculations using nuclear PDFs.

Abstract

The production of $\Lambda^+_c$ baryons produced directly at the interacting point is studied in proton-lead collisions collected with the LHCb detector at the LHC. The data sample corresponds to an integrated luminosity of $1.58\mathrm{nb}^{-1}$ recorded at a nucleon-nucleon centre-of-mass energy of $\sqrt{s_{NN}}=5.02$ TeV. Measurements of the differential cross-section and the forward-backward production ratio are reported for $\Lambda^+_c$ baryons with transverse momenta in the range $2<p_{T}<10$GeV/$c$ and rapidities in the ranges $1.5<y^*<4.0$ and $-4.5<y^*<-2.5$ in the nucleon-nucleon centre-of-mass system. The ratio of cross-sections of $\Lambda^+_c$ baryons and $D^0$ mesons is also reported. The results are compared with next-to-leading order calculations that use nuclear parton distribution functions.