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Cherenkov radiation from jets in heavy-ion collisions
V Koch1, A Majumder, Xin-Nian Wang
1Nuclear Science Division, Lawrence Berkeley National Laboratory, California 94720, USA.
Physical Review Letters
|May 23, 2006
Summary
Cherenkov-like gluon bremsstrahlung in dense matter may occur, influenced by partonic bound states. Jet correlations can probe the matter's refractive index, revealing bound state mass scales.
Area of Science:
- High-energy physics
- Nuclear physics
- Quantum chromodynamics
Background:
- Dense matter can exhibit unique particle interactions.
- Cherenkov radiation is a phenomenon typically observed in electromagnetic interactions.
Purpose of the Study:
- Investigate Cherenkov-like gluon bremsstrahlung in dense matter.
- Determine the sensitivity of Cherenkov radiation to partonic bound states.
- Explore spectroscopic methods for probing matter properties.
Main Methods:
- Theoretical study of gluon bremsstrahlung.
- Calculation of dispersion relations in a simplified model.
- Analysis of jet correlations.
Main Results:
- Cherenkov radiation in dense matter is sensitive to the presence of partonic bound states.
- A model coupling massless particles to massive resonances illustrates this sensitivity.
- Detailed spectroscopy of jet correlations can probe the refractive index.
Conclusions:
- The refractive index of dense matter provides information on the mass scale of partonic bound states.
- Spectroscopy of jet correlations offers a direct method to study these properties.