Dependence of net-hyperon production at mid-rapidity on beam energy and its implication on baryon number carrier
The conventional picture of baryon number is that each valence quark inside a baryon carries 1/3 unit of baryon number. However, an alternative picture exists where the center of a Y-shaped topology of gluon fields, called the baryon junction, carries 1 unit of baryon number. Previous analysis sugge...
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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_03014.pdf |
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| _version_ | 1832098467484270592 |
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| author | Tsang Chun Yuen |
| author_facet | Tsang Chun Yuen |
| author_sort | Tsang Chun Yuen |
| collection | DOAJ |
| description | The conventional picture of baryon number is that each valence quark inside a baryon carries 1/3 unit of baryon number. However, an alternative picture exists where the center of a Y-shaped topology of gluon fields, called the baryon junction, carries 1 unit of baryon number. Previous analysis suggests that the nature of the baryon number carrier is sensitive to net-proton yields at mid-rapidity in heavy-ion collisions, and experimental measurements potentially challenge the conventional picture. In this study, we analyzed published data from the BES-I program at RHIC, which performed Au+Au collisions at center-of-mass energies ranging from 7.7 to 200 GeV. We investigated the rapidity dependence of net-hyperon yields after correcting for strangeness production suppression, and found that the net-hyperon yields at mid-rapidity follow an exponential dependence on the beam rapidity. This behavior is consistent with Regge model predictions. Moreover, the exponential slopes for net- Λ, net-Ξ, and net-Ω are consistent with each other, suggesting that the baryon transport is flavor blind. Conventional models like PYTHIA, which use valence quarks as the baryon number carrier, have difficulty reproducing this transport behavior. |
| format | Article |
| id | doaj-art-f31cf41e40c94cf9911faa44f961a47a |
| 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-f31cf41e40c94cf9911faa44f961a47a2025-02-05T10:53:01ZengEDP SciencesEPJ Web of Conferences2100-014X2025-01-013160301410.1051/epjconf/202531603014epjconf_sqm2024_03014Dependence of net-hyperon production at mid-rapidity on beam energy and its implication on baryon number carrierTsang Chun Yuen0Brookhaven National LaboratoryThe conventional picture of baryon number is that each valence quark inside a baryon carries 1/3 unit of baryon number. However, an alternative picture exists where the center of a Y-shaped topology of gluon fields, called the baryon junction, carries 1 unit of baryon number. Previous analysis suggests that the nature of the baryon number carrier is sensitive to net-proton yields at mid-rapidity in heavy-ion collisions, and experimental measurements potentially challenge the conventional picture. In this study, we analyzed published data from the BES-I program at RHIC, which performed Au+Au collisions at center-of-mass energies ranging from 7.7 to 200 GeV. We investigated the rapidity dependence of net-hyperon yields after correcting for strangeness production suppression, and found that the net-hyperon yields at mid-rapidity follow an exponential dependence on the beam rapidity. This behavior is consistent with Regge model predictions. Moreover, the exponential slopes for net- Λ, net-Ξ, and net-Ω are consistent with each other, suggesting that the baryon transport is flavor blind. Conventional models like PYTHIA, which use valence quarks as the baryon number carrier, have difficulty reproducing this transport behavior.https://www.epj-conferences.org/articles/epjconf/pdf/2025/01/epjconf_sqm2024_03014.pdf |
| spellingShingle | Tsang Chun Yuen Dependence of net-hyperon production at mid-rapidity on beam energy and its implication on baryon number carrier EPJ Web of Conferences |
| title | Dependence of net-hyperon production at mid-rapidity on beam energy and its implication on baryon number carrier |
| title_full | Dependence of net-hyperon production at mid-rapidity on beam energy and its implication on baryon number carrier |
| title_fullStr | Dependence of net-hyperon production at mid-rapidity on beam energy and its implication on baryon number carrier |
| title_full_unstemmed | Dependence of net-hyperon production at mid-rapidity on beam energy and its implication on baryon number carrier |
| title_short | Dependence of net-hyperon production at mid-rapidity on beam energy and its implication on baryon number carrier |
| title_sort | dependence of net hyperon production at mid rapidity on beam energy and its implication on baryon number carrier |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2025/01/epjconf_sqm2024_03014.pdf |
| work_keys_str_mv | AT tsangchunyuen dependenceofnethyperonproductionatmidrapidityonbeamenergyanditsimplicationonbaryonnumbercarrier |