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Quark Matter May Not Be Strange.

Bob Holdom1, Jing Ren1, Chen Zhang1

  • 1Department of Physics, University of Toronto, Toronto, Ontario M5S1A7, Canada.

Physical Review Letters
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PubMed
Summary
This summary is machine-generated.

Strange quark matter (SQM) is usually expected, but this study finds that up and down quark matter (udQM) has lower energy. Stable udQM may exist for large baryon numbers, beyond ordinary nuclei.

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Area of Science:

  • Nuclear Physics
  • Particle Physics
  • Quantum Chromodynamics

Background:

  • Strange quark matter (SQM) is theorized as the ground state of baryonic matter.
  • Ordinary nuclei stability has previously dismissed the possibility of up and down quark matter (udQM).

Purpose of the Study:

  • To investigate the energetic favorability of udQM compared to nuclear matter and SQM.
  • To determine the conditions under which udQM could be the ground state of baryonic matter.

Main Methods:

  • A phenomenological model was developed to describe meson nonet spectra.
  • Calculations considered bulk energy per baryon and finite size effects.

Main Results:

  • Up and down quark matter (udQM) exhibits lower bulk energy per baryon than both nuclear matter and SQM.
  • Finite size effects indicate udQM can be the ground state for baryon numbers exceeding a minimum threshold (A > ~300).

Conclusions:

  • Ordinary nuclei remain stable due to their small baryon number.
  • A new form of stable baryonic matter, udQM, may exist for large baryon numbers, extending beyond the periodic table.