Study of Heavy Flavor at the STAR Experiment
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F21%3A00557370" target="_blank" >RIV/61389005:_____/21:00557370 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Study of Heavy Flavor at the STAR Experiment
Original language description
This work focuses on the analysis of Lambda c which is the lightest baryon containing a charm quark. As such, the Lambda c presents a unique probe to study the behavior of charm quarks in the hot and dense QCD medium created in ultra-relativistic heavy-ion collisions. Together with the measurement of the D0 meson, we can study modes of charm quark hadronization and bring additional insights into the quark coalescense process in the strongly coupled quark-gluon plasma. Λc baryons have an extremely short lifetime which makes the reconstruction experimentally challenging. The novel detector Heavy Flavor Tracker, installed at the STAR experiment between the years 2014-2016, has shown high efficiency and an unparalleled pointing resolution that can facilitate the Lambda c reconstruction in heavy-ion collisions. In this thesis, we describe the first reconstruction of the Lambda c baryons via hadronic decays in Au+Au collisions and, moreover, the first such measurement differentiated in transverse momentum and the number of participants in heavy-ion collisions. The measured yield shows that the Λc make a sizeable contribution to the total charm yield in Au+Au collisions. Moreover, the Labmda c/D0 yield ratio is significantly larger in Au+Au collisions, compared to simulated p+p collisions, and is consistent with theoretical calculations that include charm-quark coalescence.
Czech name
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Czech description
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Classification
Type
O - Miscellaneous
CEP classification
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OECD FORD branch
10303 - Particles and field physics
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů