A search for the rare decay D-0 -> mu(+) mu(-) is reported using proton-proton collision events at root s = 13.6 TeV collected by the CMS detector in 2022-2023, corresponding to an integrated luminosity of 64.5 fb(-1). This is the first analysis to use a newly developed inclusive dimuon trigger, expanding the scope of the CMS flavor physics program. The search uses D-0 mesons obtained from D*(+) -> D-0 pi(+) decays. No significant excess is observed. A limit on the branching fraction of B(D-0 -> mu(+)mu(-)) < 2.4 x 10(-9) at 95% confidence level is set. This is the most stringent upper limit set on any flavor changing neutral current decay in the charm sector.

Chekhovsky, V., Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Andrejkovic, J.W., et al. (2025). Search for the Rare Decay D0 → μ+ μ- in Proton-Proton Collisions at √s=13.6 TeV. PHYSICAL REVIEW LETTERS, 135(15) [10.1103/zc76-rgcp].

Search for the Rare Decay D0 → μ+ μ- in Proton-Proton Collisions at √s=13.6 TeV

Ciocci, M. A.;D'Amante, V.;Turini, N.;
2025-01-01

Abstract

A search for the rare decay D-0 -> mu(+) mu(-) is reported using proton-proton collision events at root s = 13.6 TeV collected by the CMS detector in 2022-2023, corresponding to an integrated luminosity of 64.5 fb(-1). This is the first analysis to use a newly developed inclusive dimuon trigger, expanding the scope of the CMS flavor physics program. The search uses D-0 mesons obtained from D*(+) -> D-0 pi(+) decays. No significant excess is observed. A limit on the branching fraction of B(D-0 -> mu(+)mu(-)) < 2.4 x 10(-9) at 95% confidence level is set. This is the most stringent upper limit set on any flavor changing neutral current decay in the charm sector.
2025
Chekhovsky, V., Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Andrejkovic, J.W., et al. (2025). Search for the Rare Decay D0 → μ+ μ- in Proton-Proton Collisions at √s=13.6 TeV. PHYSICAL REVIEW LETTERS, 135(15) [10.1103/zc76-rgcp].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/1324076
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