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Ion-induced quark-gluon implosion.

L Frankfurt1, M Strikman

  • 1School of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel.

Physical Review Letters
|August 9, 2003
PubMed
Summary

Nuclear fragmentation at the Large Hadron Collider (LHC) involves nucleons shedding soft partons. This leads to leading quarks and gluons fragmenting into an implosion of nuclear constituents.

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Area of Science:

  • High-energy nuclear physics
  • Particle physics
  • Quantum chromodynamics

Background:

  • Understanding nuclear fragmentation is crucial for comprehending particle interactions at extreme energies.
  • Proton-nucleus and nucleus-nucleus collisions at the CERN Large Hadron Collider (LHC) provide a unique environment to study these phenomena.

Purpose of the Study:

  • To investigate the mechanism of nuclear fragmentation in high-energy collisions.
  • To model the behavior of nucleons and their constituents during fragmentation.

Main Methods:

  • Utilizing a semiclassical approximation to analyze collision dynamics.
  • Examining the role of soft and hard interactions and parton stripping.

Main Results:

  • Nucleons fragment into leading quarks and gluons with high transverse momentum (p(t)).
  • Valence quarks and gluons exhibit opposing momentum flows in the center-of-mass frame.
  • The fragmentation process results in an implosion of quark and gluon constituents.

Conclusions:

  • Initial state densities in the fragmentation region are estimated to be >/=50 GeV/fm(3) at LHC energies.
  • Similar densities are predicted to be >/=10 GeV/fm(3) at Brookhaven National Laboratory's Relativistic Heavy Ion Collider (RHIC).
  • The study provides insights into the non-equilibrium state formed during nuclear fragmentation.

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