Nuclear interactions and net-proton number fluctuations in heavy ion collisions at the SIS18 accelerator
The effect of nuclear interactions on measurable net-proton number fluctuations in heavy ion collisions at the SIS18/GSI accelerator is investigated. The state of the art UrQMD model including interaction potentials is employed. It is found that the nuclear forces enhance the baryon number cumulants...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2018-10-01
|
| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269318306439 |
| _version_ | 1819091092096679936 |
|---|---|
| author | Jan Steinheimer Yongjia Wang Ayon Mukherjee Yunxiao Ye Chenchen Guo Qingfeng Li Horst Stoecker |
| author_facet | Jan Steinheimer Yongjia Wang Ayon Mukherjee Yunxiao Ye Chenchen Guo Qingfeng Li Horst Stoecker |
| author_sort | Jan Steinheimer |
| collection | DOAJ |
| description | The effect of nuclear interactions on measurable net-proton number fluctuations in heavy ion collisions at the SIS18/GSI accelerator is investigated. The state of the art UrQMD model including interaction potentials is employed. It is found that the nuclear forces enhance the baryon number cumulants, as predicted from grand canonical thermodynamical models. The effect however is smeared out for proton number fluctuations due to iso-spin randomization and global baryon number conservation, which decreases the cumulant ratios. For a rapidity acceptance window larger than Δy>0.4 the effects of global baryon number conservation dominate and all cumulant ratios are significantly smaller than 1. Keywords: Proton number fluctuations, Nuclear interactions |
| first_indexed | 2024-12-21T22:34:13Z |
| format | Article |
| id | doaj.art-f7a7d66b65b64254823e1afd465c7f36 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-21T22:34:13Z |
| publishDate | 2018-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-f7a7d66b65b64254823e1afd465c7f362022-12-21T18:48:00ZengElsevierPhysics Letters B0370-26932018-10-017854045Nuclear interactions and net-proton number fluctuations in heavy ion collisions at the SIS18 acceleratorJan Steinheimer0Yongjia Wang1Ayon Mukherjee2Yunxiao Ye3Chenchen Guo4Qingfeng Li5Horst Stoecker6Frankfurt Institute for Advanced Studies, Ruth-Moufang-Str. 1, D-60438 Frankfurt am Main, Germany; Corresponding author.School of Science, Huzhou University, Huzhou 313000, ChinaFrankfurt Institute for Advanced Studies, Ruth-Moufang-Str. 1, D-60438 Frankfurt am Main, Germany; Institut für Theoretische Physik, Goethe-Universität Frankfurt, Max-von-Laue-Strasse 1, D-60438 Frankfurt am Main, GermanySchool of Science, Huzhou University, Huzhou 313000, China; Department of Physics, Zhejiang University, Hangzhou 310027, ChinaSino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, ChinaSchool of Science, Huzhou University, Huzhou 313000, China; Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaFrankfurt Institute for Advanced Studies, Ruth-Moufang-Str. 1, D-60438 Frankfurt am Main, Germany; Institut für Theoretische Physik, Goethe-Universität Frankfurt, Max-von-Laue-Strasse 1, D-60438 Frankfurt am Main, Germany; GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, GermanyThe effect of nuclear interactions on measurable net-proton number fluctuations in heavy ion collisions at the SIS18/GSI accelerator is investigated. The state of the art UrQMD model including interaction potentials is employed. It is found that the nuclear forces enhance the baryon number cumulants, as predicted from grand canonical thermodynamical models. The effect however is smeared out for proton number fluctuations due to iso-spin randomization and global baryon number conservation, which decreases the cumulant ratios. For a rapidity acceptance window larger than Δy>0.4 the effects of global baryon number conservation dominate and all cumulant ratios are significantly smaller than 1. Keywords: Proton number fluctuations, Nuclear interactionshttp://www.sciencedirect.com/science/article/pii/S0370269318306439 |
| spellingShingle | Jan Steinheimer Yongjia Wang Ayon Mukherjee Yunxiao Ye Chenchen Guo Qingfeng Li Horst Stoecker Nuclear interactions and net-proton number fluctuations in heavy ion collisions at the SIS18 accelerator Physics Letters B |
| title | Nuclear interactions and net-proton number fluctuations in heavy ion collisions at the SIS18 accelerator |
| title_full | Nuclear interactions and net-proton number fluctuations in heavy ion collisions at the SIS18 accelerator |
| title_fullStr | Nuclear interactions and net-proton number fluctuations in heavy ion collisions at the SIS18 accelerator |
| title_full_unstemmed | Nuclear interactions and net-proton number fluctuations in heavy ion collisions at the SIS18 accelerator |
| title_short | Nuclear interactions and net-proton number fluctuations in heavy ion collisions at the SIS18 accelerator |
| title_sort | nuclear interactions and net proton number fluctuations in heavy ion collisions at the sis18 accelerator |
| url | http://www.sciencedirect.com/science/article/pii/S0370269318306439 |
| work_keys_str_mv | AT jansteinheimer nuclearinteractionsandnetprotonnumberfluctuationsinheavyioncollisionsatthesis18accelerator AT yongjiawang nuclearinteractionsandnetprotonnumberfluctuationsinheavyioncollisionsatthesis18accelerator AT ayonmukherjee nuclearinteractionsandnetprotonnumberfluctuationsinheavyioncollisionsatthesis18accelerator AT yunxiaoye nuclearinteractionsandnetprotonnumberfluctuationsinheavyioncollisionsatthesis18accelerator AT chenchenguo nuclearinteractionsandnetprotonnumberfluctuationsinheavyioncollisionsatthesis18accelerator AT qingfengli nuclearinteractionsandnetprotonnumberfluctuationsinheavyioncollisionsatthesis18accelerator AT horststoecker nuclearinteractionsandnetprotonnumberfluctuationsinheavyioncollisionsatthesis18accelerator |