Unconventional Mechanisms of Heavy Quark Fragmentation

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F23%3A00368633" target="_blank" >RIV/68407700:21340/23:00368633 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.3390/universe9090418" target="_blank" >https://doi.org/10.3390/universe9090418</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/universe9090418" target="_blank" >10.3390/universe9090418</a>

Result language
angličtina
Original language name
Unconventional Mechanisms of Heavy Quark Fragmentation
Original language description
Heavy and light quarks produced in high-???????? partonic collisions radiate differently. Heavy quarks regenerate their color field, stripped-off in the hard reaction, much faster than the light ones and radiate a significantly smaller fraction of the initial quark energy. This peculiar feature of heavy-quark jets leads to a specific shape of the fragmentation functions observed in ????+????- annihilation. Differently from light flavors, the heavy quark fragmentation function strongly peaks at large fractional momentum z, i.e., the produced heavy–light mesons, B or D, carry the main fraction of the jet momentum. This is a clear evidence of the dead-cone effect, and of a short production time of a heavy–light mesons. Contrary to propagation of a small ????????̲ dipole, which survives in the medium due to color transparency, a heavy–light ????????̲ dipole promptly expands to a large size. Such a big dipole has no chance to remain intact in a dense medium produced in relativistic heavy ion collisions. On the other hand, a breakup of such a dipole does not affect much the production rate of ????????̲ mesons, differently from the case of light ????????̲ meson production.
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
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OECD FORD branch
10303 - Particles and field physics

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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