Signal of the pion string at high-energy collisions

Abstract

We study the possible signals of a pion string associated with the QCD chiral phase transition in LHC Pb - Pb collision at energy $\sqrt{s}=5.5$ TeV. In terms of the Kibble-Zurek mechanism we discuss the production and evolution of the pion string. The pion string is not topologically stable, it decays into neutral pions and sigma mesons which in turn decay into pions. Our results show that all the neutral pions from the pion string are distributed at the low momentum and the ratio of neutral to charged pions from the pion string violates the isospin symmetry. For the momentum spectra of the total pions, the signal from the sigma particle decay which is from the pion string will be affected by the large decay width of the sigma significantly.

arXiv comment8 pages, 3 figures, one reference added, title changed, version accepted for publication in Phys. Rev. C

References in corpus (21)

• Event-by-Event Fluctuations in Heavy Ion Collisions and the QCD Critical Point
• Static and Dynamic Critical Phenomena at a Second Order QCD Phase Transition
• Semilocal and Electroweak Strings
• Emergence of Coherent Long Wavelength Oscillations After a Quench: Application to QCD
• Topological Defects and Structure Formation
• Equation of State, Radial Flow and Freeze-out in High Energy Heavy Ion Collisions
• Evolution of Axionic Strings and Spectrum of Axions Radiated from Them
• Chiral symmetry restoration in linear sigma models with different numbers of quark flavors
• Formation of topological defects in gauge field theories
• The Little Bang: Searching for quark-gluon matter in relativistic heavy-ion collisions
• Chiral symmetry in nuclei: partial restoration and its consequences
• Topological String Defect Formation During the Chiral Phase Transition
• Pion and Eta Strings
• Anomalous Global Strings and Primordial Magnetic Fields
• The formation rate of semilocal strings
• Stabilization of Embedded Defects by Plasma Effects
• Stabilization of the Electroweak Z String in the Early Universe
• Defect formation in the early universe
• Testing cosmological defect formation in the laboratory
• Thermal and Nonthermal Pion Enhancements with Chiral Symmetry Restoration
• Physics of Ultra-Relativistic Nuclear Collisions with Heavy Beams at LHC Energy

Cited by in corpus (6)

• Non-Abelian Global Strings at Chiral Phase Transition
• Non-Abelian Global Vortices
• On the symmetry improved CJT formalism in the $O(4)$ linear sigma model
• Stability of the pion string in a thermal and dense medium
• Pion String evolving in a thermal bath
• Cosmological Symmetry Breaking and Generation of Electromagnetic Field