Searching for the QCD critical point via the rapidity dependence of cumulants
The search for a possible critical point in the QCD phase diagram is ongoing in heavy-ion collision experiments at the BNL Relativistic Heavy Ion Collider (RHIC) which scan the phase diagram by scanning the beam energy; a coming upgrade will increase the luminosity and extend the rapidity acceptance...
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| Format: | Article |
| Language: | English |
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American Physical Society
2019
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| Online Access: | http://hdl.handle.net/1721.1/120076 https://orcid.org/0000-0002-3084-0663 https://orcid.org/0000-0001-5812-8718 |
| _version_ | 1826217601762590720 |
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| author | Mukherjee, Swagato Brewer, Jasmine Therese Rajagopal, Krishna Yin, Yi |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics Mukherjee, Swagato Brewer, Jasmine Therese Rajagopal, Krishna Yin, Yi |
| author_sort | Mukherjee, Swagato |
| collection | MIT |
| description | The search for a possible critical point in the QCD phase diagram is ongoing in heavy-ion collision experiments at the BNL Relativistic Heavy Ion Collider (RHIC) which scan the phase diagram by scanning the beam energy; a coming upgrade will increase the luminosity and extend the rapidity acceptance of the solenoidal tracker at RHIC (STAR) detector. In fireballs produced in RHIC collisions, the baryon density depends on rapidity. By employing Ising universality together with a phenomenologically motivated freeze-out prescription, we show that the resulting rapidity dependence of cumulant observables sensitive to critical fluctuations is distinctive. The dependence of the kurtosis (of the event-by-event distribution of the number of protons) on rapidity near midrapidity will change qualitatively if a critical point is passed in the scan. Hence, measuring the rapidity dependence of cumulant observables can enhance the prospect of discovering a critical point, in particular if it lies between two energies in the beam energy scan. |
| first_indexed | 2024-09-23T17:06:17Z |
| format | Article |
| id | mit-1721.1/120076 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T17:06:17Z |
| publishDate | 2019 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1200762024-06-26T20:35:06Z Searching for the QCD critical point via the rapidity dependence of cumulants Mukherjee, Swagato Brewer, Jasmine Therese Rajagopal, Krishna Yin, Yi Massachusetts Institute of Technology. Center for Theoretical Physics Brewer, Jasmine Therese Rajagopal, Krishna Yin, Yi The search for a possible critical point in the QCD phase diagram is ongoing in heavy-ion collision experiments at the BNL Relativistic Heavy Ion Collider (RHIC) which scan the phase diagram by scanning the beam energy; a coming upgrade will increase the luminosity and extend the rapidity acceptance of the solenoidal tracker at RHIC (STAR) detector. In fireballs produced in RHIC collisions, the baryon density depends on rapidity. By employing Ising universality together with a phenomenologically motivated freeze-out prescription, we show that the resulting rapidity dependence of cumulant observables sensitive to critical fluctuations is distinctive. The dependence of the kurtosis (of the event-by-event distribution of the number of protons) on rapidity near midrapidity will change qualitatively if a critical point is passed in the scan. Hence, measuring the rapidity dependence of cumulant observables can enhance the prospect of discovering a critical point, in particular if it lies between two energies in the beam energy scan. 2019-01-15T19:29:07Z 2019-01-15T19:29:07Z 2018-12 2018-05 2018-12-13T18:00:26Z Article http://purl.org/eprint/type/JournalArticle 2469-9985 2469-9993 http://hdl.handle.net/1721.1/120076 Brewer, Jasmine et al. "Searching for the QCD critical point via the rapidity dependence of cumulants." Physical Review C 98, 6 (December 2018): 061901(R) https://orcid.org/0000-0002-3084-0663 https://orcid.org/0000-0001-5812-8718 en http://dx.doi.org/10.1103/PhysRevC.98.061901 Physical Review C Creative Commons Attribution http://creativecommons.org/licenses/by/3.0 application/pdf American Physical Society American Physical Society |
| spellingShingle | Mukherjee, Swagato Brewer, Jasmine Therese Rajagopal, Krishna Yin, Yi Searching for the QCD critical point via the rapidity dependence of cumulants |
| title | Searching for the QCD critical point via the rapidity dependence of cumulants |
| title_full | Searching for the QCD critical point via the rapidity dependence of cumulants |
| title_fullStr | Searching for the QCD critical point via the rapidity dependence of cumulants |
| title_full_unstemmed | Searching for the QCD critical point via the rapidity dependence of cumulants |
| title_short | Searching for the QCD critical point via the rapidity dependence of cumulants |
| title_sort | searching for the qcd critical point via the rapidity dependence of cumulants |
| url | http://hdl.handle.net/1721.1/120076 https://orcid.org/0000-0002-3084-0663 https://orcid.org/0000-0001-5812-8718 |
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