Abstract (data abstract)

The production of prompt

Λ_{c}^{+}

baryons is measured via the exclusive decay channel

Λ_{c}^{+} \to p K^{-} π^{+}

at a center-of-mass energy per nucleon pair of

5.02 TeV

using

252 {nb}^{- 1}

proton-proton (pp) and

0.607 {nb}^{- 1}

lead-lead (PbPb) collisions collected at the CERN LHC in 2017 and 2018, respectively. The measurements are performed within the

Λ_{c}^{+}

rapidity interval

| y | < 1.0

with transverse momentum (

p_{T}

) ranges of 3--30 and 6--40

GeV / c

for pp and PbPb collisions, respectively. Compared to pp collisions scaled by the number of nucleon-nucleon interactions, the observed yields of

Λ_{c}^{+}

with

p_{T} > 10 GeV / c

are strongly suppressed in PbPb collisions. The level of suppression depends significantly on both the collision centrality and the

p_{T}

of the

Λ_{c}^{+}

baryon. The

Λ_{c}^{+} / D^{0}

production ratio in PbPb collisions is consistent with the result in pp collisions for

p_{T} > 10 GeV / c

, suggesting that the coalescence process of hadronization is not significant for PbPb collisions in the higher

p_{T}

region.

Figure 3

10.17182/hepdata.135973.v1/t1

The product of acceptance and efficiency ( $A ϵ$ ) as a function of $p_{T}$ for prompt $Λ_{c}^{+}$ in pp collisions and...
Figure 4

10.17182/hepdata.135973.v1/t2

The $p_{T}$ differential cross sections for prompt $Λ_{c}^{+}$ production in pp collisions. The global fit uncertainty is 8.6%.
Figure 5

10.17182/hepdata.135973.v1/t3

The $T_{AA}$ -scaled $Λ_{c}^{+}$ yields as a function of $p_{T}$ for PbPb collisions within centrality regions of 0-90, 0-10, 10-30, 30-50...
Figure 6

10.17182/hepdata.135973.v1/t4

The nuclear modification factor $R_{AA}$ versus $p_{T}$ for prompt $Λ_{c}^{+}$ production in centrality regions of 0-90, 0-10, 10-30, 30-50 and...
Figure 7 (left)

10.17182/hepdata.135973.v1/t5

The ratio of the production cross sections of prompt $Λ_{c}^{+}$ to prompt $D_{0}$ versus $p_{T}$ from pp collisions. The global...
Figure 7 (right)

10.17182/hepdata.135973.v1/t6

The ratio of the $T_{AA}$ -scaled prompt $Λ_{c}^{+}$ yields to prompt $D_{0}$ versus $p_{T}$ from PbPb collisions for 0-90 and 0-10%...