Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Pauli Exclusion for Quarks
Name: Steven L.
Status: student
Age: 40s
Location: N/A
Country: N/A
Date: 2001-2002


Question:
When a star collapses, if the total mass is not too large, the force between the electrons (Pauli Exclusion Principle) will halt the collapse forming a white dwarf. If the mass is larger, the force between the neutrons will cause the formation of a neutron star. If it is even larger, it is said that gravity will overwhelm even the force between the neutrons to form a black hole.

Since neutrons are composed of quarks, is there a Pauli Exclusion for quarks which might halt the collapse of larger masses?


Replies:
Yes.

The Pauli Exclusion Principle applies to all particles of half-integer spin. This category includes all fundamental particles that make up what we normally think of as matter (protons, electrons, quarks, etc.) and it excludes all particles that mediate forces (photons, gluons, etc).

Tim Mooney



Click here to return to the Physics Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (help@newton.dep.anl.gov), or at Argonne's Educational Programs

NEWTON AND ASK A SCIENTIST
Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory