Probing a new regime of ultra-dense gluonic matter using high-energy photons with the CMS experiment
In ultraperipheral collisions (UPCs) involving relativistic heavy ions, the production of heavy-flavor coherent vector mesons through photon-nuclear interactions is a key focus due to its direct sensitivity to the nuclear gluon density. Experimental measurements, however, face a two-way ambiguity as...
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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_04011.pdf |
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| author | Verma Pranjal |
| author_facet | Verma Pranjal |
| author_sort | Verma Pranjal |
| collection | DOAJ |
| description | In ultraperipheral collisions (UPCs) involving relativistic heavy ions, the production of heavy-flavor coherent vector mesons through photon-nuclear interactions is a key focus due to its direct sensitivity to the nuclear gluon density. Experimental measurements, however, face a two-way ambiguity as the collision involves two lead ions which can act as both a photon-emitter projectile and a target. This ambiguity hinders the separation of contributions from high and low-energy photon-nucleus interactions, restricting our ability to probe the extremely small-x regime where nonlinear QCD effects are anticipated. This writeup unveils the measurement of coherent heavy quarkonium photoproduction, addressing the two-way ambiguity by employing a forward neutron tagging technique in UPC PbPb collisions at 5.02 TeV. Overall these studies focus on the dominance of gluons in nuclear matter probed at higher energies. |
| format | Article |
| id | doaj-art-c0dcc39a7c2f4c6eb82babc1fd38e153 |
| 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-c0dcc39a7c2f4c6eb82babc1fd38e1532025-02-05T10:53:02ZengEDP SciencesEPJ Web of Conferences2100-014X2025-01-013160401110.1051/epjconf/202531604011epjconf_sqm2024_04011Probing a new regime of ultra-dense gluonic matter using high-energy photons with the CMS experimentVerma Pranjal0Indian Institute of Technology MadrasIn ultraperipheral collisions (UPCs) involving relativistic heavy ions, the production of heavy-flavor coherent vector mesons through photon-nuclear interactions is a key focus due to its direct sensitivity to the nuclear gluon density. Experimental measurements, however, face a two-way ambiguity as the collision involves two lead ions which can act as both a photon-emitter projectile and a target. This ambiguity hinders the separation of contributions from high and low-energy photon-nucleus interactions, restricting our ability to probe the extremely small-x regime where nonlinear QCD effects are anticipated. This writeup unveils the measurement of coherent heavy quarkonium photoproduction, addressing the two-way ambiguity by employing a forward neutron tagging technique in UPC PbPb collisions at 5.02 TeV. Overall these studies focus on the dominance of gluons in nuclear matter probed at higher energies.https://www.epj-conferences.org/articles/epjconf/pdf/2025/01/epjconf_sqm2024_04011.pdf |
| spellingShingle | Verma Pranjal Probing a new regime of ultra-dense gluonic matter using high-energy photons with the CMS experiment EPJ Web of Conferences |
| title | Probing a new regime of ultra-dense gluonic matter using high-energy photons with the CMS experiment |
| title_full | Probing a new regime of ultra-dense gluonic matter using high-energy photons with the CMS experiment |
| title_fullStr | Probing a new regime of ultra-dense gluonic matter using high-energy photons with the CMS experiment |
| title_full_unstemmed | Probing a new regime of ultra-dense gluonic matter using high-energy photons with the CMS experiment |
| title_short | Probing a new regime of ultra-dense gluonic matter using high-energy photons with the CMS experiment |
| title_sort | probing a new regime of ultra dense gluonic matter using high energy photons with the cms experiment |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2025/01/epjconf_sqm2024_04011.pdf |
| work_keys_str_mv | AT vermapranjal probinganewregimeofultradensegluonicmatterusinghighenergyphotonswiththecmsexperiment |