### Abstract

We solve analytically the ellipsoidally expanding fireball hydrodynamics with source terms in the momentum and energy equations, using the non-relativistic approximation. We find that energy transport from high-p_{t} jets of gluons to the medium leads to a transient, exponential inflation of the fireballs created in high energy heavy ion collisions. In this transient, inflatory period, the slopes of the single particle spectra are exponentially increasing, while the HBT radius parameters are exponentially decreasing with time. This effect is shown to be similar to the development of the homogeneity of our Universe due to an inflatory period. Independently of the initial conditions, and the exact value of freeze-out time and temperature, the measurables (single particle spectra, the correlation functions, slope parameters, elliptic flow, HBT radii and cross terms) become time-independent during the late, non-inflatory stages of the expansion, and they satisfy a new kind of scaling laws. If the expansion starts with a transient inflation caused by the gluon wind, it leads naturally to large transverse flows as well as to the simultaneous equality, and scaling behaviour of the HBT radius parameters, R_{side} ≈ R_{out} ≈ R_{long} ≈ t_{f} √T_{f}/m. With certain relativistic corrections, the scaling limit is τ_{f} √T_{f}/m_{t}, where m_{t} is the mean transverse mass of the pair.

Original language | English |
---|---|

Pages (from-to) | 281-293 |

Number of pages | 13 |

Journal | Acta Physica Hungarica New Series Heavy Ion Physics |

Volume | 17 |

Issue number | 2-4 |

DOIs | |

Publication status | Published - 2003 |

### Fingerprint

### Keywords

- Bose-Einstein correlations
- Fireball hydrodynamics
- Inflation
- Relativistic heavy ion collisions
- Single-particle spectra

### ASJC Scopus subject areas

- Physics and Astronomy(all)
- Nuclear and High Energy Physics

### Cite this

**Inflation of fireballs, the gluon wind and the homogeneity of the HBT radii at RHIC.** / Csörgő, T.; Zimányi, J.

Research output: Contribution to journal › Article

*Acta Physica Hungarica New Series Heavy Ion Physics*, vol. 17, no. 2-4, pp. 281-293. https://doi.org/10.1556/APH.17.2003.2-4.12

}

TY - JOUR

T1 - Inflation of fireballs, the gluon wind and the homogeneity of the HBT radii at RHIC

AU - Csörgő, T.

AU - Zimányi, J.

PY - 2003

Y1 - 2003

N2 - We solve analytically the ellipsoidally expanding fireball hydrodynamics with source terms in the momentum and energy equations, using the non-relativistic approximation. We find that energy transport from high-pt jets of gluons to the medium leads to a transient, exponential inflation of the fireballs created in high energy heavy ion collisions. In this transient, inflatory period, the slopes of the single particle spectra are exponentially increasing, while the HBT radius parameters are exponentially decreasing with time. This effect is shown to be similar to the development of the homogeneity of our Universe due to an inflatory period. Independently of the initial conditions, and the exact value of freeze-out time and temperature, the measurables (single particle spectra, the correlation functions, slope parameters, elliptic flow, HBT radii and cross terms) become time-independent during the late, non-inflatory stages of the expansion, and they satisfy a new kind of scaling laws. If the expansion starts with a transient inflation caused by the gluon wind, it leads naturally to large transverse flows as well as to the simultaneous equality, and scaling behaviour of the HBT radius parameters, Rside ≈ Rout ≈ Rlong ≈ tf √Tf/m. With certain relativistic corrections, the scaling limit is τf √Tf/mt, where mt is the mean transverse mass of the pair.

AB - We solve analytically the ellipsoidally expanding fireball hydrodynamics with source terms in the momentum and energy equations, using the non-relativistic approximation. We find that energy transport from high-pt jets of gluons to the medium leads to a transient, exponential inflation of the fireballs created in high energy heavy ion collisions. In this transient, inflatory period, the slopes of the single particle spectra are exponentially increasing, while the HBT radius parameters are exponentially decreasing with time. This effect is shown to be similar to the development of the homogeneity of our Universe due to an inflatory period. Independently of the initial conditions, and the exact value of freeze-out time and temperature, the measurables (single particle spectra, the correlation functions, slope parameters, elliptic flow, HBT radii and cross terms) become time-independent during the late, non-inflatory stages of the expansion, and they satisfy a new kind of scaling laws. If the expansion starts with a transient inflation caused by the gluon wind, it leads naturally to large transverse flows as well as to the simultaneous equality, and scaling behaviour of the HBT radius parameters, Rside ≈ Rout ≈ Rlong ≈ tf √Tf/m. With certain relativistic corrections, the scaling limit is τf √Tf/mt, where mt is the mean transverse mass of the pair.

KW - Bose-Einstein correlations

KW - Fireball hydrodynamics

KW - Inflation

KW - Relativistic heavy ion collisions

KW - Single-particle spectra

UR - http://www.scopus.com/inward/record.url?scp=0041823265&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0041823265&partnerID=8YFLogxK

U2 - 10.1556/APH.17.2003.2-4.12

DO - 10.1556/APH.17.2003.2-4.12

M3 - Article

AN - SCOPUS:0041823265

VL - 17

SP - 281

EP - 293

JO - Acta Physica Hungarica, Series A: Heavy Ion Physics

JF - Acta Physica Hungarica, Series A: Heavy Ion Physics

SN - 1219-7580

IS - 2-4

ER -