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Measurement of coherent exclusive J/ψ → μμ production in ultraperipheral Pb+Pb collisions at sNN=5.36 TeV with the ATLAS detector
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Measurement of coherent exclusive J/ψ → μμ production in ultraperipheral Pb+Pb collisions at sNN=5.36 TeV with the ATLAS detector

G. Aad, E. Aakvaag, B. Abbott, S. Abdelhameed, K. Abeling, N. J. Abicht, S. H. Abidi, M. Aboelela, A. Aboulhorma, H. Abramowicz, …
The journal of high energy physics, 卷.2026(4), 20
01/04/2026
Web of Science ID: WOS:001750641800001

摘要

Hadron-Hadron Scattering
<p>The ATLAS experiment has performed a measurement of coherent exclusive J/psi -> mu(+) mu(-) production in ultraperipheral Pb+Pb collisions at root s(NN) = 5.36 TeV. The data was recorded at the Large Hadron Collider (LHC) during 2023, and corresponds to an integrated luminosity of 79 mu b(-1). Exclusive J/psi 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/psi rapidity and are compared with theoretical predictions. After extrapolation to root s(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.</p>

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https://doi.org/10.1007/JHEP04(2026)020檢視
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引用書目主題
5 Physics
5.9 Particles & Fields
5.9.73 Meson Dynamics
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Physics, Particles & Fields
ESI研究領域
Physics

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