Finite size of hadrons and HBT interferometry for hydrodynamic sources

Hadrons formed in heavy-ion collisions are not point-like objects, they cannot occupy too close space-time points. When the two bosons are too close to each other, their constituents start to mix and they cannot be considered as bosons subjected to Bose–Einstein statistics, this effect is called the excluded volume effect. We study the excluded volume effect on Hanbury Brown–Twiss (HBT) for the sources with various sizes. The effect on HBT was shown in out, side and long directions, and it is more obvious for the source with a narrow space-time distribution. The correlation functions for high transverse momenta are more suppressed by the excluded volume effect.

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The Excluded Volume Effect of Very-long-chain Molecules

Bulletin of the Chemical Society of Japan ◽

10.1246/bcsj.41.538 ◽

1968 ◽

Vol 41 (2) ◽

pp. 538-538 ◽

Cited By ~ 20

Author(s):

Keizo Suzuki

Keyword(s):

Volume Effect ◽

Excluded Volume ◽

Chain Molecules ◽

Excluded Volume Effect ◽

Long Chain

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Excluded volume effect enhances the homology pairing of model chromosomes

Nonlinear Theory and Its Applications IEICE ◽

10.1587/nolta.7.66 ◽

2016 ◽

Vol 7 (2) ◽

pp. 66-75 ◽

Cited By ~ 3

Author(s):

Kazunori Takamiya ◽

Keisuke Yamamoto ◽

Shuhei Isami ◽

Hiraku Nishimori ◽

Akinori Awazu

Keyword(s):

Volume Effect ◽

Excluded Volume ◽

Excluded Volume Effect

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Comment on “Measurement of the space-time extent of the hard-photon emitting source in heavy-ion collisions at 100 MeV/nucleon”

Physical Review C ◽

10.1103/physrevc.57.2763 ◽

1998 ◽

Vol 57 (5) ◽

pp. 2763-2764

Author(s):

F. M. Marqués

Keyword(s):

Heavy Ion Collisions ◽

Heavy Ion ◽

Space Time ◽

Hard Photon ◽

Ion Collisions

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Excluded volume effect for the nuclear matter equation of state

Zeitschrift für Physik C Particles and Fields ◽

10.1007/bf01548574 ◽

1991 ◽

Vol 51 (3) ◽

pp. 485-489 ◽

Cited By ~ 217

Author(s):

D. H. Rischke ◽

M. I. Gorenstein ◽

H. St�cker ◽

W. Greiner

Keyword(s):

Equation Of State ◽

Nuclear Matter ◽

Volume Effect ◽

Excluded Volume ◽

Excluded Volume Effect

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FRACTALS AND THE QUANTUM THEORY OF SPACETIME

International Journal of Modern Physics A ◽

10.1142/s0217751x89002156 ◽

1989 ◽

Vol 04 (19) ◽

pp. 5047-5117 ◽

Cited By ~ 99

Author(s):

LAURENT NOTTALE

Keyword(s):

Fractal Dimension ◽

Heavy Ion ◽

Space Time ◽

Curvilinear Coordinates ◽

Fractal Structures ◽

Ion Collisions ◽

Principle Of Relativity ◽

First Results ◽

Fractal Space ◽

Dimension 2

We review in this paper the first results obtained in an attempt at understanding quantum space-time based on a new extension of the principle of relativity and on the geometrical concept of fractals. We present methods for dealing with the nondifferentiability and the infinities of fractals, as a first step towards the definition and intrinsic description of a fractal space. After having recalled that the Heisenberg relations imply a transition of spatial coordinates of a particle to fractal dimension 2 about the de Broglie length λ = ħ/p, it is suggested that a similar transition occurs for temporal coordinates about the de Broglie time τ = ħ/E. We then investigate the hypothesis that the microstructure of space-time is of fractal nature, and that the observed properties of the quantum world at a given resolution result from the smoothing of curvilinear coordinates of such a spacetime projected into classical spacetime. Along this road, we successively study the link of fractal dimension 2 to spin, we give first hints on the expected behavior of families of fractal geodesics, and we exhibit a general class of fractal structures which is assumed to yield a lowest order description of the quantum vacuum. The links between the new approach and both special and general relativity are touched upon. We finally suggest that the anomalous peaks recently observed in the spectra of positrons from supercritical heavy ion collisions may be understood in this context.

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