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Intermediate mass strangelets are positively charged

Madsen1

  • 1Institute of Physics and Astronomy, University of Aarhus, DK-8000 Arhus C, Denmark.

Physical Review Letters
|November 18, 2000
PubMed
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Stable strangelets, composed of quarks, are always positively charged due to surface effects. This finding excludes the possibility of runaway growth for negatively charged strangelets in heavy-ion collisions.

Area of Science:

  • Nuclear Physics
  • Particle Physics
  • Quantum Chromodynamics

Background:

  • Strange quark matter (SQM) is a hypothetical form of matter containing up, down, and strange quarks.
  • The charge of bulk SQM can be negative due to one-gluon exchange interactions.
  • Surface tension effects are crucial for understanding the properties of finite-sized SQM, known as strangelets.

Purpose of the Study:

  • To investigate the net charge of strangelets, particularly intermediate-mass strangelets.
  • To determine if negatively charged strangelets can exist and grow indefinitely.
  • To assess the implications for ultrarelativistic heavy-ion collisions.

Main Methods:

  • Theoretical calculations of quark occupation and charge distribution in strangelets.

Related Experiment Videos

  • Analysis of surface tension effects on strangelet charge.
  • Parameter space exploration for varying baryon numbers and coupling constants.

    • Main Results:

    • Intermediate-mass strangelets (baryon number 10^2-10^18) always exhibit a positive net quark charge.
    • Surface layer effects, specifically reduced strange quark occupation, dominate over bulk charge effects.
    • The charge of strangelets is generally positive, irrespective of renormalization scheme details.

    Conclusions:

    • The existence of stable, bulk negatively charged strangelets is unlikely.
    • The scenario of indefinitely growing, negatively charged strangelets is ruled out.
    • This has significant implications for understanding matter formed in heavy-ion collisions and astrophysical phenomena.