Balance Function in High-Energy Collisions
Aspects and implications of the balance functions (BF) in high-energy physics are reviewed. The various calculations and measurements depending on different quantities, for example, system size, collisions centrality, and beam energy, are discussed. First, the different definitions including advanta...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2015-01-01
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| Series: | Advances in High Energy Physics |
| Online Access: | http://dx.doi.org/10.1155/2015/186812 |
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| Summary: | Aspects and implications of the balance functions (BF) in high-energy physics are reviewed. The
various calculations and measurements depending on different quantities, for example, system size, collisions
centrality, and beam energy, are discussed. First, the different definitions including advantages and
even short-comings are highlighted. It is found that BF, which are mainly presented in terms of
relative rapidity, and relative azimuthal and invariant relative momentum, are sensitive to the interaction
centrality but not to the beam energy and can be used in estimating the hadronization time and the
hadron-quark phase transition. Furthermore, the quark chemistry can be determined. The chemical
evolution of the new-state-of-matter, the quark-gluon plasma, and its temporal-spatial evolution,
femtoscopy of two-particle correlations, are accessible. The production time of positive-negative
pair of charges can be determined from the widths of BF. Due to the reduction in the diffusion
time, narrowed widths refer to delayed hadronization. It is concluded that BF are powerful tools
characterizing hadron-quark phase transition and estimating some essential properties. |
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| ISSN: | 1687-7357 1687-7365 |