Extracting the dependence of directed flow differences on conserved charges
Recently, seven produced hadron species have been used to construct multiple hadron sets with given differences in the net electric charge (∆q) and strangeness (∆S) between the two sides. A nonzero directed flow difference △v1 has been proposed as a consequence of the electromagnetic field produced...
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EDP Sciences
2025-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2025/01/epjconf_sqm2024_06007.pdf |
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| author | Lin Zi-Wei Nayak Kishora Shi Shusu |
| author_facet | Lin Zi-Wei Nayak Kishora Shi Shusu |
| author_sort | Lin Zi-Wei |
| collection | DOAJ |
| description | Recently, seven produced hadron species have been used to construct multiple hadron sets with given differences in the net electric charge (∆q) and strangeness (∆S) between the two sides. A nonzero directed flow difference △v1 has been proposed as a consequence of the electromagnetic field produced in relativistic heavy ion collisions. Previously, we have shown with quark coalescence that Av1 and the slope difference △v′1 depend linearly on both △q and ∆S with zero intercept. Here we emphasize that a two-dimensional function or fit is necessary for extracting the △q- and △S-dependences of △v1. On the other hand, a one-dimensional fit gives a different value for the slope parameter of the ∆q- or ∆S-dependence. Furthermore, a one-dimensional fit is incorrect because its slope parameter depends on the arbitrary scaling factor of a hadron set and is thus ill-defined. We use test data of △v1 to explicitly demonstrate these points. |
| format | Article |
| id | doaj-art-1b0fc204362d4d26bf854f42fef81cfb |
| institution | Kabale University |
| issn | 2100-014X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj-art-1b0fc204362d4d26bf854f42fef81cfb2025-02-05T10:53:02ZengEDP SciencesEPJ Web of Conferences2100-014X2025-01-013160600710.1051/epjconf/202531606007epjconf_sqm2024_06007Extracting the dependence of directed flow differences on conserved chargesLin Zi-Wei0Nayak Kishora1Shi Shusu2Department of Physics, East Carolina UniversityDepartment of Physics, Panchayat College, Sambalpur UniversityKey Laboratory of Quark & Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal UniversityRecently, seven produced hadron species have been used to construct multiple hadron sets with given differences in the net electric charge (∆q) and strangeness (∆S) between the two sides. A nonzero directed flow difference △v1 has been proposed as a consequence of the electromagnetic field produced in relativistic heavy ion collisions. Previously, we have shown with quark coalescence that Av1 and the slope difference △v′1 depend linearly on both △q and ∆S with zero intercept. Here we emphasize that a two-dimensional function or fit is necessary for extracting the △q- and △S-dependences of △v1. On the other hand, a one-dimensional fit gives a different value for the slope parameter of the ∆q- or ∆S-dependence. Furthermore, a one-dimensional fit is incorrect because its slope parameter depends on the arbitrary scaling factor of a hadron set and is thus ill-defined. We use test data of △v1 to explicitly demonstrate these points.https://www.epj-conferences.org/articles/epjconf/pdf/2025/01/epjconf_sqm2024_06007.pdf |
| spellingShingle | Lin Zi-Wei Nayak Kishora Shi Shusu Extracting the dependence of directed flow differences on conserved charges EPJ Web of Conferences |
| title | Extracting the dependence of directed flow differences on conserved charges |
| title_full | Extracting the dependence of directed flow differences on conserved charges |
| title_fullStr | Extracting the dependence of directed flow differences on conserved charges |
| title_full_unstemmed | Extracting the dependence of directed flow differences on conserved charges |
| title_short | Extracting the dependence of directed flow differences on conserved charges |
| title_sort | extracting the dependence of directed flow differences on conserved charges |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2025/01/epjconf_sqm2024_06007.pdf |
| work_keys_str_mv | AT linziwei extractingthedependenceofdirectedflowdifferencesonconservedcharges AT nayakkishora extractingthedependenceofdirectedflowdifferencesonconservedcharges AT shishusu extractingthedependenceofdirectedflowdifferencesonconservedcharges |