Lambda(c+) Production and Baryon-to-Meson Ratios in pp and p-Pb Collisions at root s(NN)=5.02 TeV at the LHC

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00551810" target="_blank" >RIV/68378271:_____/21:00551810 - isvavai.cz</a>
Alternative codes found
RIV/61389005:_____/21:00551810
Result on the web
<a href="https://doi.org/10.1103/PhysRevLett.127.202301" target="_blank" >https://doi.org/10.1103/PhysRevLett.127.202301</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.127.202301" target="_blank" >10.1103/PhysRevLett.127.202301</a>

Result language
angličtina
Original language name
Lambda(c+) Production and Baryon-to-Meson Ratios in pp and p-Pb Collisions at root s(NN)=5.02 TeV at the LHC
Original language description
The prompt production of the charm baryon Lambda(c+) and the Lambda(c+)/D-0 production ratios were measured at midrapidity with the ALICE detector in pp and (p)-Pb collisions at root sNN = 5.02 TeV. These new measurements show a clear decrease of the Lambda(+)(c)/D-0 ratio with increasing transverse momentum (p(T)) in both collision systems in the range 2 < P-T < 12 GeV/c, exhibiting similarities with the light-flavor baryon-tomeson ratios p/pi and Lambda/K-S(0). At low p(T), predictions that include additional color-reconnection mechanisms beyond the leading-color approximation, assume the existence of additional higher-mass charm-baryon states, or include hadronization via coalescence can describe the data, while predictions driven by charmquark fragmentation processes measured in e(+) e(-) and e(-) p collisions significantly underestimate the data. The results presented in this Letter provide significant evidence that the established assumption of universality (colliding-system independence) of parton-to-hadron fragmentation is not sufficient to describe charm-baryon production in hadronic collisions at LHC energies.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10303 - Particles and field physics

Project
<a href="/en/project/LTT17018" target="_blank" >LTT17018: Getting new knowledge of the microworld using the CERN infrastructure</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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