Estimate of a nonflow baseline for the chiral magnetic effect in isobar collisions at RHIC
Recently, STAR reported the isobar (4496Ru + 4496Ru, 4096Zr + 4096Zr4496Ru+4496Ru, 4096Zr +4096Zr) results for the chiral magnetic effect (CME) search. The Ru+Ru to Zr+Zr ratio of the CME-sensitive observable Δγ, normalized by elliptic anisotropy (υ2), is observed to be close to the inverse multipli...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2023-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2023/02/epjconf_sqm2022_06013.pdf |
| _version_ | 1811157405856169984 |
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| author | Feng Yicheng |
| author_facet | Feng Yicheng |
| author_sort | Feng Yicheng |
| collection | DOAJ |
| description | Recently, STAR reported the isobar (4496Ru + 4496Ru, 4096Zr + 4096Zr4496Ru+4496Ru, 4096Zr +4096Zr) results for the chiral magnetic effect (CME) search. The Ru+Ru to Zr+Zr ratio of the CME-sensitive observable Δγ, normalized by elliptic anisotropy (υ2), is observed to be close to the inverse multiplicity (N) ratio. In other words, the ratio of the NΔγ/υ2 observable is close to the naive background baseline of unity. However, nonflow correlations are expected to cause the baseline to deviate from unity. To further understand the isobar results, we decompose the nonflow contributions to NΔγ/υ2 (isobar ratio) into three terms and quantify each term by using the nonflow in υ2 measurement, published STAR data, and HIJING simulation. From these studies, we estimate a nonflow baseline of the isobar ratio of NΔγ/υ2 for the CME and discuss its implications. |
| first_indexed | 2024-04-10T05:06:59Z |
| format | Article |
| id | doaj.art-36bb7308aa1c448280d86eb6f93764a6 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-04-10T05:06:59Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-36bb7308aa1c448280d86eb6f93764a62023-03-09T12:03:02ZengEDP SciencesEPJ Web of Conferences2100-014X2023-01-012760601310.1051/epjconf/202327606013epjconf_sqm2022_06013Estimate of a nonflow baseline for the chiral magnetic effect in isobar collisions at RHICFeng Yicheng0Department of Physics and Astronomy, Purdue UniversityRecently, STAR reported the isobar (4496Ru + 4496Ru, 4096Zr + 4096Zr4496Ru+4496Ru, 4096Zr +4096Zr) results for the chiral magnetic effect (CME) search. The Ru+Ru to Zr+Zr ratio of the CME-sensitive observable Δγ, normalized by elliptic anisotropy (υ2), is observed to be close to the inverse multiplicity (N) ratio. In other words, the ratio of the NΔγ/υ2 observable is close to the naive background baseline of unity. However, nonflow correlations are expected to cause the baseline to deviate from unity. To further understand the isobar results, we decompose the nonflow contributions to NΔγ/υ2 (isobar ratio) into three terms and quantify each term by using the nonflow in υ2 measurement, published STAR data, and HIJING simulation. From these studies, we estimate a nonflow baseline of the isobar ratio of NΔγ/υ2 for the CME and discuss its implications.https://www.epj-conferences.org/articles/epjconf/pdf/2023/02/epjconf_sqm2022_06013.pdf |
| spellingShingle | Feng Yicheng Estimate of a nonflow baseline for the chiral magnetic effect in isobar collisions at RHIC EPJ Web of Conferences |
| title | Estimate of a nonflow baseline for the chiral magnetic effect in isobar collisions at RHIC |
| title_full | Estimate of a nonflow baseline for the chiral magnetic effect in isobar collisions at RHIC |
| title_fullStr | Estimate of a nonflow baseline for the chiral magnetic effect in isobar collisions at RHIC |
| title_full_unstemmed | Estimate of a nonflow baseline for the chiral magnetic effect in isobar collisions at RHIC |
| title_short | Estimate of a nonflow baseline for the chiral magnetic effect in isobar collisions at RHIC |
| title_sort | estimate of a nonflow baseline for the chiral magnetic effect in isobar collisions at rhic |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2023/02/epjconf_sqm2022_06013.pdf |
| work_keys_str_mv | AT fengyicheng estimateofanonflowbaselineforthechiralmagneticeffectinisobarcollisionsatrhic |