Measurement of coherent exclusive J/[psi] → [mu]+[mu]− production in ultraperipheral Pb+Pb collisions at √sNN = 5.36 TeV with the ATLAS detector
The ATLAS experiment has performed a measurement of coherent exclusive J/ψ → μ+μ− production in ultraperipheral Pb+Pb collisions at $$ \sqrt{s_{\textrm{NN}}}=5.36 $$TeV. The data was recorded at the Large Hadron Collider (LHC) during 2023, and corresponds to an integrated luminosity of 79 μb−1. Excl...
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| Main Authors: | , , , , , , , , , , , , , , , , |
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| Corporate Author: | |
| Other Authors: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
01 April 2026
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| In: |
Journal of high energy physics
Year: 2026, Issue: 4, Pages: 1-47 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP04(2026)020 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1007/JHEP04(2026)020
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| Author Notes: | the ATLAS collaboration* |
| Summary: | The ATLAS experiment has performed a measurement of coherent exclusive J/ψ → μ+μ− production in ultraperipheral Pb+Pb collisions at $$ \sqrt{s_{\textrm{NN}}}=5.36 $$TeV. The data was recorded at the Large Hadron Collider (LHC) during 2023, and corresponds to an integrated luminosity of 79 μb−1. Exclusive J/ψ candidates were selected with a dedicated track-sensitive trigger based on the ATLAS transition radiation tracker. The analysis involves reconstruction of the dimuon invariant mass based on muon tracks from the inner detector, as the muon transverse momentum range of interest precludes the use of the standard muon reconstruction and identification algorithms. Differential cross sections are measured as a function of J/ψ rapidity and are compared with theoretical predictions. After extrapolation to $$ \sqrt{s_{\textrm{NN}}}=5.02 $$TeV, they are also compared with previous measurements performed by other experiments using data from LHC Run 2. While the results agree reasonably well with theoretical predictions, they are in tension with previous Run-2 results for the central rapidity region. |
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| Item Description: | Veröffentlicht: 01. April 2026 *The ATLAS collaboration: G. Aad, A. Ackermann, M.J. Backes, L.M. Baltes, F. Bartels, S.J. Dittmeier, M. Dunford, S. Franchino, T. Junkermann, A. Nandi, L. Sanfilippo, A. Schoening, H.-C. Schultz-Coulon, V. Sothilingam, R. Stamen, C. Vigani, M. Wessels, J. Zinsser [sehr viele weitere Personen] Gesehen am 19.08.2026 Im Titel sind das Plus- und Minuszeichen hochgestellt Im Titel steht der Ausdruck "sNN" unter dem Wurzelsymbol |
| Physical Description: | Online Resource |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP04(2026)020 |