Measurement of photonuclear jet production in ultraperipheral Pb+Pb collisions at √sNN=5.02 TeV with the ATLAS detector
- Autores
- Alonso, Francisco; Beaucamp, Jean Yves; Dova, María Teresa; Monticelli, Fernando Gabriel; Orellana, Gonzalo Enrique; Sili, Francisco; Wahlberg, Hernán Pablo; The ATLAS Collaboration
- Año de publicación
- 2025
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- In ultrarelativistic heavy ion collisions at the LHC, each nucleus acts a sources of high-energy real photons that can scatter off the opposing nucleus in ultraperipheral photonuclear (γ+A) collisions. Hard scattering processes initiated by the photons in such collisions provide a novel method for probing nuclear parton distributions in a kinematic region not easily accessible to other measurements. ATLAS has measured production of dijet and multijet final states in ultraperipheral Pb+Pb collisions at √sNN=5.02 TeV using a dataset recorded in 2018 with an integrated luminosity of 1.72 nb⁻¹.. Photonuclear final states are selected by requiring a rapidity gap in the photon direction; this selects events where one of the outgoing nuclei remains intact. Jets are reconstructed using the anti-kt algorithm with radius parameter, R=0.4. Triple-differential cross sections, unfolded for detector response, are measured and presented using two sets of kinematic variables. The first set consists of the total transverse momentum (HT), rapidity, and mass of the jet system. The second set uses HT and particle-level nuclear and photon parton momentum fractions, xA and zγ, respectively. The results are compared with leading-order perturbative QCD calculations of photonuclear jet production cross sections, where all leading order predictions using existing fits fall below the data in the shadowing region. More detailed theoretical comparisons will allow these results to strongly constrain nuclear parton distributions, and these data provide results from the LHC directly comparable to early physics results at the planned Electron-Ion Collider.
La lista completa de autores que integran el documento puede consultarse en el archivo.
Instituto de Física La Plata - Materia
-
Física
Ultraperipheral collisions
Photonuclear interactions
Nuclear parton distribution functions - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/196037
Ver los metadatos del registro completo
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Measurement of photonuclear jet production in ultraperipheral Pb+Pb collisions at √sNN=5.02 TeV with the ATLAS detectorAlonso, FranciscoBeaucamp, Jean YvesDova, María TeresaMonticelli, Fernando GabrielOrellana, Gonzalo EnriqueSili, FranciscoWahlberg, Hernán PabloThe ATLAS CollaborationFísicaUltraperipheral collisionsPhotonuclear interactionsNuclear parton distribution functionsIn ultrarelativistic heavy ion collisions at the LHC, each nucleus acts a sources of high-energy real photons that can scatter off the opposing nucleus in ultraperipheral photonuclear (γ+A) collisions. Hard scattering processes initiated by the photons in such collisions provide a novel method for probing nuclear parton distributions in a kinematic region not easily accessible to other measurements. ATLAS has measured production of dijet and multijet final states in ultraperipheral Pb+Pb collisions at √sNN=5.02 TeV using a dataset recorded in 2018 with an integrated luminosity of 1.72 nb⁻¹.. Photonuclear final states are selected by requiring a rapidity gap in the photon direction; this selects events where one of the outgoing nuclei remains intact. Jets are reconstructed using the anti-kt algorithm with radius parameter, R=0.4. Triple-differential cross sections, unfolded for detector response, are measured and presented using two sets of kinematic variables. The first set consists of the total transverse momentum (HT), rapidity, and mass of the jet system. The second set uses HT and particle-level nuclear and photon parton momentum fractions, xA and zγ, respectively. The results are compared with leading-order perturbative QCD calculations of photonuclear jet production cross sections, where all leading order predictions using existing fits fall below the data in the shadowing region. More detailed theoretical comparisons will allow these results to strongly constrain nuclear parton distributions, and these data provide results from the LHC directly comparable to early physics results at the planned Electron-Ion Collider.La lista completa de autores que integran el documento puede consultarse en el archivo.Instituto de Física La Plata2025info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/196037enginfo:eu-repo/semantics/altIdentifier/issn/2470-0010info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.111.052006info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2026-06-23T11:17:12Zoai:sedici.unlp.edu.ar:10915/196037Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292026-06-23 11:17:12.913SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Measurement of photonuclear jet production in ultraperipheral Pb+Pb collisions at √sNN=5.02 TeV with the ATLAS detector |
| title |
Measurement of photonuclear jet production in ultraperipheral Pb+Pb collisions at √sNN=5.02 TeV with the ATLAS detector |
| spellingShingle |
Measurement of photonuclear jet production in ultraperipheral Pb+Pb collisions at √sNN=5.02 TeV with the ATLAS detector Alonso, Francisco Física Ultraperipheral collisions Photonuclear interactions Nuclear parton distribution functions |
| title_short |
Measurement of photonuclear jet production in ultraperipheral Pb+Pb collisions at √sNN=5.02 TeV with the ATLAS detector |
| title_full |
Measurement of photonuclear jet production in ultraperipheral Pb+Pb collisions at √sNN=5.02 TeV with the ATLAS detector |
| title_fullStr |
Measurement of photonuclear jet production in ultraperipheral Pb+Pb collisions at √sNN=5.02 TeV with the ATLAS detector |
| title_full_unstemmed |
Measurement of photonuclear jet production in ultraperipheral Pb+Pb collisions at √sNN=5.02 TeV with the ATLAS detector |
| title_sort |
Measurement of photonuclear jet production in ultraperipheral Pb+Pb collisions at √sNN=5.02 TeV with the ATLAS detector |
| dc.creator.none.fl_str_mv |
Alonso, Francisco Beaucamp, Jean Yves Dova, María Teresa Monticelli, Fernando Gabriel Orellana, Gonzalo Enrique Sili, Francisco Wahlberg, Hernán Pablo The ATLAS Collaboration |
| author |
Alonso, Francisco |
| author_facet |
Alonso, Francisco Beaucamp, Jean Yves Dova, María Teresa Monticelli, Fernando Gabriel Orellana, Gonzalo Enrique Sili, Francisco Wahlberg, Hernán Pablo The ATLAS Collaboration |
| author_role |
author |
| author2 |
Beaucamp, Jean Yves Dova, María Teresa Monticelli, Fernando Gabriel Orellana, Gonzalo Enrique Sili, Francisco Wahlberg, Hernán Pablo The ATLAS Collaboration |
| author2_role |
author author author author author author author |
| dc.subject.none.fl_str_mv |
Física Ultraperipheral collisions Photonuclear interactions Nuclear parton distribution functions |
| topic |
Física Ultraperipheral collisions Photonuclear interactions Nuclear parton distribution functions |
| dc.description.none.fl_txt_mv |
In ultrarelativistic heavy ion collisions at the LHC, each nucleus acts a sources of high-energy real photons that can scatter off the opposing nucleus in ultraperipheral photonuclear (γ+A) collisions. Hard scattering processes initiated by the photons in such collisions provide a novel method for probing nuclear parton distributions in a kinematic region not easily accessible to other measurements. ATLAS has measured production of dijet and multijet final states in ultraperipheral Pb+Pb collisions at √sNN=5.02 TeV using a dataset recorded in 2018 with an integrated luminosity of 1.72 nb⁻¹.. Photonuclear final states are selected by requiring a rapidity gap in the photon direction; this selects events where one of the outgoing nuclei remains intact. Jets are reconstructed using the anti-kt algorithm with radius parameter, R=0.4. Triple-differential cross sections, unfolded for detector response, are measured and presented using two sets of kinematic variables. The first set consists of the total transverse momentum (HT), rapidity, and mass of the jet system. The second set uses HT and particle-level nuclear and photon parton momentum fractions, xA and zγ, respectively. The results are compared with leading-order perturbative QCD calculations of photonuclear jet production cross sections, where all leading order predictions using existing fits fall below the data in the shadowing region. More detailed theoretical comparisons will allow these results to strongly constrain nuclear parton distributions, and these data provide results from the LHC directly comparable to early physics results at the planned Electron-Ion Collider. La lista completa de autores que integran el documento puede consultarse en el archivo. Instituto de Física La Plata |
| description |
In ultrarelativistic heavy ion collisions at the LHC, each nucleus acts a sources of high-energy real photons that can scatter off the opposing nucleus in ultraperipheral photonuclear (γ+A) collisions. Hard scattering processes initiated by the photons in such collisions provide a novel method for probing nuclear parton distributions in a kinematic region not easily accessible to other measurements. ATLAS has measured production of dijet and multijet final states in ultraperipheral Pb+Pb collisions at √sNN=5.02 TeV using a dataset recorded in 2018 with an integrated luminosity of 1.72 nb⁻¹.. Photonuclear final states are selected by requiring a rapidity gap in the photon direction; this selects events where one of the outgoing nuclei remains intact. Jets are reconstructed using the anti-kt algorithm with radius parameter, R=0.4. Triple-differential cross sections, unfolded for detector response, are measured and presented using two sets of kinematic variables. The first set consists of the total transverse momentum (HT), rapidity, and mass of the jet system. The second set uses HT and particle-level nuclear and photon parton momentum fractions, xA and zγ, respectively. The results are compared with leading-order perturbative QCD calculations of photonuclear jet production cross sections, where all leading order predictions using existing fits fall below the data in the shadowing region. More detailed theoretical comparisons will allow these results to strongly constrain nuclear parton distributions, and these data provide results from the LHC directly comparable to early physics results at the planned Electron-Ion Collider. |
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2025 |
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2025 |
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