Open Questions: The Strong Force and QCD
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Prerequisites: The standard model
See also: Quantum field theory
Site indexes
-
Open Directory Project: Particle Physics: Chromodynamics
- Categorized and annotated links. A version of this
list is at
Google, with entries sorted in "page rank" order.
-
Galaxy: Chromodynamics
- Categorized site directory. Entries usually include
descriptive annotations.
Sites with general resources
-
Relativistic Heavy Ion Collider
- Web site of the research project which is investigating
quark-gluon plasma.
Surveys, overviews, tutorials
-
Strong interaction
- Article from
Wikipedia.
See also
Quark,
Gluon,
Quantum chromodynamics.
-
Of gluons, atoms and strings
- September 2009 article from
Physics World.
"An unusual alliance between physicists who study ultrahot
plasmas and ultracold atoms is yielding intriguing results -
and may even lead to an experimental test for string theory,
as Barbara Jacak reveals."
-
Colourful calculations
- Summary of December 2006 article from
Physics World.
"The formidable computational power of lattice QCD is finally
allowing researchers to make solid predictions about the force
that binds quarks inside protons and neutrons."
-
Liquid universe hints at strings
- June 2005 article from
Physics World.
"Researchers at RHIC have seen convincing new evidence for a
quark-gluon plasma. But it looks more like a perfect liquid
than a gas, which could have implications for string theory."
-
Do pentaquarks really exist?
- February 2005 article from
Physics World, by
Frank Close.
"Results from a growing number of experiments at laboratories
around the world are casting doubt on the recent discovery of
particles containing five quarks."
-
Quarks, diquarks and pentaquarks
- June 2004 article from
Physics World, by
Robert Jaffe and Frank Wilczek.
"Pentaquarks do not fit into the traditional quark model of hadrons,
but understanding these exotic new particles is offering fresh
insights into the subtleties of the strong interaction."
-
Charmed particles at the double
- October 2002 article from
Physics World, by
John Yelton. "The observation of baryons containing two charm quarks in a
fixed-target experiment at Fermilab has surprised and puzzled the
high-energy-physics community. Why do different doubly charmed baryons
have such different masses?"
-
Physicists Find Evidence for an Exotic Baryon
- Contains several explanatory articles on experiments which
seem to have found evidence for the existence of pentaquarks.
There are also a number of external links to further information.
-
Physicists report signs of new relatives of the proton
- June 14, 2002 press release on the observation of a doubly-charmed
baryon.
-
A strange quark plasma
- October 2000 article from
Physics World, by
Emanuele Quercigh and Johann Rafelski. "Laboratory experiments have
recreated the conditions that existed in the early universe before
the quarks and gluons created in the big bang had formed the protons
and neutrons that make up the world today."
-
The "Strangeness" of Protons
- December 2000 Scientific American news article about
experiments investigating the contribution of strange quarks to
the proton's magnetic moment.
-
Fireballs of Free Quarks
- Brief April 2000 article from Scientific American
on the observation of quark-gluon plasma.
-
RHIC makes its debut
- June 2000 news article from
Physics World.
-
CERN claims quark-gluon first
- February 2000 news article from
Physics World.
-
Maybe this watched pot already boiled
- May 2001 news article in Science News, about
attempts to create a quark-gluon plama in the Relativistic
Heavy Ion Collider.
-
Collider is cookin', but is it soup?
- January 2001 news article in Science News, about
attempts to create a quark-gluon plama in the Relativistic
Heavy Ion Collider.
-
Melting nuclei re-create Big Bang broth
- February 2000 news article in Science News, about
attempts to create a quark-gluon plama in the CERN Super
Proton Synchrotron.
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Mashing atomic nuclei to create a quark soup
- September 1996 news article in Science News, about
discussions of quark-gluon plama at a conference on quark matter.
-
The First Few Microseconds
Michael Riordan; William A. Zajc
Scientific American, May 2006
-
- Shattered Glass
David Appell
Scientific American, April 2004
-
-
The Search for QCD Exotics
Alex R. Dzierba; Curtis A. Meyer; Eric S. Swanson
American Scientist, September-October, 2000, pp 406-415
- Quantum Chromodynamics provides the fundamental theoretical
framework of the Standard Model. It predicts the existence of
certain "exotic" particles such as "glueballs" consisting
entirely of gluons. Currently ongoing experiments may detect
such particles.
-
QCD Made Simple
Frank Wilczek
Physics Today, August 2000, pp. 22-28
- Quantum chromodynamics (QCD) is the mathematical theory of
the strong force. The theory resembles quantum electrodynamics
(QED), the theory of the electromagnetic force, but with
important differences.
-
Seeking the Mother of All Matter
Peter Weiss
Science News, August 26, 2000, pp. 136-138
- The Relativistic Heavy Ion Collider (RHIC) has finally started
to produce quark-gluon plasma from the collisions of very high
energy gold ions.
- The Glue that Holds the World Together
Robert Kunzig
Discover, July 2000, pp 64-69
- Quantum Chromodynamics predicts a form of matter called quark-gluon
plasma, which can exist only at extremely high energies. New
accelerator experiments may be able to create it. The theory also
suggests that common particles like protons are much more
complex than normally envisioned.
- The Mystery of Nucleon Spin
Klaus Rith; Andreas Schäfer
Scientific American, July 1999, pp. 58-63
- Although the spin of the proton seems to be consistent with
the spin of its constituent quarks, precise calculations to
prove this are infeasible. Experiments indicate the situation
is much more complex than had been supposed, leading to a
"spin crisis", but theorists are gradually coming up with a
plausible account of the situation.
- Glueballs
Frank E. Close, Philip R. Page
Scientific American, November 1998, pp. 80-85
- Gluons are particles that mediate the strong nuclear force.
Clumps of gluons called glueballs that are predicted by the
theory of the strong force may have been detected.
- Quarks by Computer
Donald H. Weingarten
Scientific American, February 1996, pp. 116-120
- Computations lasting a year on one of the largest supercomputers
have helped confirm predictions of quantum chromodynamics. They
have also accurately predicted the existence and properties of
"glueballs".
- Where Does the Proton Really Get Its Spin?
Robert L. Jaffe
Physics Today, September 1995, pp. 24-30
- Polarized scattering experiments show that quarks actually
contribute little to the proton's spin. This "spin crisis" is
helping clarify QCD in contrast to a naive quark model.
- The Search for Strange Matter
Henry J. Crawford; Carsten H. Greiner
Scientific American, January 1994, pp. 72-77
- No theoretical principles seem to rule out assemblages of
nuclear matter intermediate in size between atomic nuclei and
neutron stars, yet nothing of the sort has ever been observed.
If it exists, it may include "strange" quarks in addition to
the usual "up" and "down" flavors.
- Asymptotic Freedom
David J. Gross
Physics Today, January 1987, pp. 39-44
- The strong force between quarks varies with the distance
between them. But unlike electromagnetic force, for example, the
force decreases with distance, due to dynamics of the vacuum.
As the force becomes vanishingly small at very small distances,
quarks in effect become "asymptoticall free".
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Copyright © 2002 by Charles Daney, All Rights Reserved