We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Unconventional Mechanisms of Heavy Quark Fragmentation.
- Authors
Kopeliovich, Boris; Nemchik, Jan; Potashnikova, Irina; Schmidt, Ivan
- Abstract
Heavy and light quarks produced in high- p T 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 e + e − 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 q q ¯ dipole, which survives in the medium due to color transparency, a heavy–light Q q ¯ 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 Q q ¯ mesons, differently from the case of light q q ¯ meson production.
- Subjects
FLAVOR in particle physics; QUARKS; HEAVY ion collisions; MESONS
- Publication
Universe (2218-1997), 2023, Vol 9, Issue 9, p418
- ISSN
2218-1997
- Publication type
Article
- DOI
10.3390/universe9090418