Hadron-ion collisions in Pythia and the vector-meson dominance model for photoproduction
Abstract We present an extension to the Pythia Monte Carlo event generator that enables simulations of collisions between a generic hadron beam on a nuclear target with energy variation in event-by-event basis. This builds upon Pythia ’s module for heavy ions, Angantyr, as well as previous work on s...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-11-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-024-13543-6 |
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| author | Ilkka Helenius Marius Utheim |
| author_facet | Ilkka Helenius Marius Utheim |
| author_sort | Ilkka Helenius |
| collection | DOAJ |
| description | Abstract We present an extension to the Pythia Monte Carlo event generator that enables simulations of collisions between a generic hadron beam on a nuclear target with energy variation in event-by-event basis. This builds upon Pythia ’s module for heavy ions, Angantyr, as well as previous work on simulating hadron-proton collisions. As such, the extensions in this work are largely technical, except for a rudimentary model for hadronic fluctuations. With hadron-ion simulations, we implement an explicit vector-meson dominance (VMD) model that can be used to simulate interactions of hadronic component of real photons in photo-nuclear collisions. Such processes can be studied in ultra-peripheral heavy-ion collisions and in the future also with the upcoming Electron-Ion Collider. Our work also has applications to hadronic showers, e.g. air showers initiated by high-energy cosmic rays. We first validate the VMD model by comparing to HERA photoproduction data on proton target. Then we apply this to generate events for ultra-peripheral heavy-ion collisions at the LHC and present the results corresponding to the event-selection criteria matching to a recent ATLAS analysis. We find that single-particle multiplicity and rapidity distributions are well in line with the measured ones. We also construct the Fourier coefficients from two-particle correlations for the simulated events and study whether the resulting azimuthal anisotropies are consistent with the ATLAS results. |
| format | Article |
| id | doaj-art-628f3b4df49f45f2a787cffb2b3911ce |
| institution | Kabale University |
| issn | 1434-6052 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-628f3b4df49f45f2a787cffb2b3911ce2024-12-29T12:43:33ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522024-11-01841111810.1140/epjc/s10052-024-13543-6Hadron-ion collisions in Pythia and the vector-meson dominance model for photoproductionIlkka Helenius0Marius Utheim1Department of Physics, University of JyvaskylaDepartment of Physics, University of JyvaskylaAbstract We present an extension to the Pythia Monte Carlo event generator that enables simulations of collisions between a generic hadron beam on a nuclear target with energy variation in event-by-event basis. This builds upon Pythia ’s module for heavy ions, Angantyr, as well as previous work on simulating hadron-proton collisions. As such, the extensions in this work are largely technical, except for a rudimentary model for hadronic fluctuations. With hadron-ion simulations, we implement an explicit vector-meson dominance (VMD) model that can be used to simulate interactions of hadronic component of real photons in photo-nuclear collisions. Such processes can be studied in ultra-peripheral heavy-ion collisions and in the future also with the upcoming Electron-Ion Collider. Our work also has applications to hadronic showers, e.g. air showers initiated by high-energy cosmic rays. We first validate the VMD model by comparing to HERA photoproduction data on proton target. Then we apply this to generate events for ultra-peripheral heavy-ion collisions at the LHC and present the results corresponding to the event-selection criteria matching to a recent ATLAS analysis. We find that single-particle multiplicity and rapidity distributions are well in line with the measured ones. We also construct the Fourier coefficients from two-particle correlations for the simulated events and study whether the resulting azimuthal anisotropies are consistent with the ATLAS results.https://doi.org/10.1140/epjc/s10052-024-13543-6 |
| spellingShingle | Ilkka Helenius Marius Utheim Hadron-ion collisions in Pythia and the vector-meson dominance model for photoproduction European Physical Journal C: Particles and Fields |
| title | Hadron-ion collisions in Pythia and the vector-meson dominance model for photoproduction |
| title_full | Hadron-ion collisions in Pythia and the vector-meson dominance model for photoproduction |
| title_fullStr | Hadron-ion collisions in Pythia and the vector-meson dominance model for photoproduction |
| title_full_unstemmed | Hadron-ion collisions in Pythia and the vector-meson dominance model for photoproduction |
| title_short | Hadron-ion collisions in Pythia and the vector-meson dominance model for photoproduction |
| title_sort | hadron ion collisions in pythia and the vector meson dominance model for photoproduction |
| url | https://doi.org/10.1140/epjc/s10052-024-13543-6 |
| work_keys_str_mv | AT ilkkahelenius hadronioncollisionsinpythiaandthevectormesondominancemodelforphotoproduction AT mariusutheim hadronioncollisionsinpythiaandthevectormesondominancemodelforphotoproduction |