Fast resonance decays in nuclear collisions
We present a new method to calculate the final decay spectrum of direct resonance decays directly from hydrodynamic fields on a freeze-out surface. The method is based on identifying components of the final particle spectrum that transform in an irreducible way under rotations in the fluid-restframe...
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| Main Authors: | , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2021
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| In: |
Nuclear physics. A, Nuclear and hadronic physics
Year: 2021, Volume: 1005, Pages: 1-4 |
| ISSN: | 1873-1554 |
| DOI: | 10.1016/j.nuclphysa.2020.121988 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.nuclphysa.2020.121988 Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0375947420302980 
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| Author Notes: | Aleksas Mazeliauskas, Stefan Floerchinger, Eduardo Grossi, Derek Teaney |
| Summary: | We present a new method to calculate the final decay spectrum of direct resonance decays directly from hydrodynamic fields on a freeze-out surface. The method is based on identifying components of the final particle spectrum that transform in an irreducible way under rotations in the fluid-restframe. Corresponding distribution functions can be pre-computed including all resonance decays. Just a few of easily tabulated scalar functions then determine the Lorentz invariant decay spectrum from each space-time point, and simple integrals of these scalar functions over the freeze-out surface determine the final decay products. This by-passes numerically costly event-by-event calculations of the intermediate resonances. The method is of considerable practical use for making realistic data to model comparisons of the identified particle yields and flow harmonics, and for studying the viscous corrections to the freeze-out distribution function. |
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| Item Description: | Online Publikationsdatum: 10 December 2020 Gesehen am 02.04.2022 |
| Physical Description: | Online Resource |
| ISSN: | 1873-1554 |
| DOI: | 10.1016/j.nuclphysa.2020.121988 |