Complexity in high-energy physics

✍ Scribed by W. Kittel

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 397 KB
• Volume: 338
• Category: Article
• ISSN: 0378-4371
• DOI: 10.1016/j.physa.2004.02.066

✦ Synopsis

In addition to its importance in describing high-energy processes themselves, the dynamics of multiparticle production has become part of the general ÿeld of non-linear phenomena and complex systems. Multiparticle dynamics is one of the rare ÿelds of physics where higher-order correlations are directly accessible in their full multi-dimensional characteristics under well-controlled experimental conditions. Multi-particle dynamics, therefore, is an ideal testing ground for the development of advanced statistical methods. Higher-order correlations have, indeed, been observed as particle-density uctuations. Approximate scaling with improving resolution provides evidence for a self-similar correlation e ect. Quantum-Chromodynamics branching is a good candidate for a dynamical explanation of these correlations in e + e -collisions at CERN/LEP and, as expected, also of those in pp collisions at future CERN/LHC energies. However, also other sources such as identical-particle Bose-Einstein interference e ects contribute.