Unconventional Mechanisms of Heavy Quark Fragmentation

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Unconventional Mechanisms of Heavy Quark Fragmentation

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Unconventional Mechanisms of Heavy Quark Fragmentation

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Universe

ISSN

2218-1997

e-ISSN

2218-1997

Svazek periodika

9

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

001078007700001

EID výsledku v databázi Scopus

2-s2.0-85172186576