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Exclusive dilepton production at forward rapidities in PbPb collisions

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arxiv 2012.08923 v1 pith:2TKIOIS3 submitted 2020-12-16 hep-ph hep-ex

Exclusive dilepton production at forward rapidities in PbPb collisions

classification hep-ph hep-ex
keywords productiondileptonexclusiveanalysiscollisionsdiffractiveexperimentalforward
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The dilepton production in diffractive and exclusive processes at forward rapidities considering ultraperipheral $PbPb$ collisions at the LHC is investigated. Predictions for the $e^+ e^-$, $\mu^+ \mu^-$ and $\tau^+ \tau^-$ cross sections are presented taking into account of realistic cuts that can be implemented by the LHCb Collaboration in a future experimental analysis. Our results indicate that the background associated with the diffractive production can be strongly suppressed and the exclusive processes can be cleanly separated. For the $\tau^+ \tau^-$ production, the semi and purely leptonic decay channels are considered. Our results indicate that a future experimental analysis of the dilepton production at the LHCb is feasible and can be useful to search for BSM physics.

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  1. Differential measurements of $\gamma\gamma\to\tau\tau$ and constraints on $\tau$-lepton electromagnetic moments in Pb+Pb collisions at $\sqrt{s_{_\text{NN}}} = 5.02$ TeV with ATLAS

    nucl-ex 2026-05 unverdicted novelty 7.0

    First differential cross-sections for γγ→ττ in Pb+Pb collisions yield 95% CL intervals -0.057 < a_τ < 0.035 and |d_τ| < 2.7×10^{-16} e cm.