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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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Detalles Bibliográficos
Autores principales: Mazeliauskas, Aleksas, Floerchinger, Stefan, Grossi, Eduardo, Teaney, Derek
Lenguaje:eng
Publicado: 2021
Materias:
Acceso en línea:https://dx.doi.org/10.1016/j.nuclphysa.2020.121988
http://cds.cern.ch/record/2751709
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author Mazeliauskas, Aleksas
Floerchinger, Stefan
Grossi, Eduardo
Teaney, Derek
author_facet Mazeliauskas, Aleksas
Floerchinger, Stefan
Grossi, Eduardo
Teaney, Derek
author_sort Mazeliauskas, Aleksas
collection CERN
description 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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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2021
record_format invenio
spelling oai-inspirehep.net-18372382021-02-15T07:41:30Zdoi:10.1016/j.nuclphysa.2020.121988http://cds.cern.ch/record/2751709engMazeliauskas, AleksasFloerchinger, StefanGrossi, EduardoTeaney, DerekFast resonance decays in nuclear collisionsNuclear Physics - TheoryWe 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.oai:inspirehep.net:18372382021
spellingShingle Nuclear Physics - Theory
Mazeliauskas, Aleksas
Floerchinger, Stefan
Grossi, Eduardo
Teaney, Derek
Fast resonance decays in nuclear collisions
title Fast resonance decays in nuclear collisions
title_full Fast resonance decays in nuclear collisions
title_fullStr Fast resonance decays in nuclear collisions
title_full_unstemmed Fast resonance decays in nuclear collisions
title_short Fast resonance decays in nuclear collisions
title_sort fast resonance decays in nuclear collisions
topic Nuclear Physics - Theory
url https://dx.doi.org/10.1016/j.nuclphysa.2020.121988
http://cds.cern.ch/record/2751709
work_keys_str_mv AT mazeliauskasaleksas fastresonancedecaysinnuclearcollisions
AT floerchingerstefan fastresonancedecaysinnuclearcollisions
AT grossieduardo fastresonancedecaysinnuclearcollisions
AT teaneyderek fastresonancedecaysinnuclearcollisions