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

Chekhovsky, V.Hayrapetyan, A.Makarenko, V.Tumasyan, A.Adam, W.Andrejkovic, J. W.Druzhkin, D.2026-01-102026-01-1020250031-90071079-7114https://doi.org/10.1103/zc76-rgcpFigueiredo, Diego/0000-0003-2514-6930; Ruiz, Jose/0000-0002-3306-0363; Palencia Cortezon, Jose Enrique/0000-0001-8264-0287; Saidmakhamadov, Nosir/0000-0002-7460-5972; Lampén, Tapio/0000-0002-8398-4249; Painesis, Haris/0000-0001-5061-7031; Tuominiemi, Jorma/0000-0003-0386-8633; Grunewald, Martin/0000-0002-5754-0388; Lehti, Sami/0000-0003-1370-5598; De Souza Lemos, Dener/0000-0003-1982-8978; Rossi Tisbeni, Simone/0000-0001-6776-285X; Hernández Calama, José María/0000-0001-6436-7547; Consuegra Roiguez, Sana/0000-0002-1383-1837; Agicevic, Marko/0000-0003-1967-6783; Rantanen, Milla-Maarit/0000-0002-6764-0016; Giacomo, Bolini/0000-0001-5490-605X; Muñoz Díaz, Conrado/0009-0001-3417-4557; Sastre, Javier/0000-0002-1654-2846; Jang, Woojin/0000-0002-1571-9072; Eimanis, Karlis/0000-0003-0972-5641; Myllymäki, Mikael/0000-0003-0510-3810; Thachayath Sugunan, Aravind/0000-0001-6545-0350; Lehti, Sami/0000-0003-1370-5598; Hensel, Carsten/0000-0001-8874-7624; Grunewald, Martin/0000-0002-5754-0388; Bartek, Rachel/0000-0002-1686-2882; Jaramillo Gallego, Johny/0000-0003-3885-6608; Fernández Ramos, Juan Pablo/0000-0002-0122-313X; Pereira, Miguel/0000-0003-4296-7028; Ruales, Anderson/0000-0003-0826-0803; Ribeiro Lopes, Beatriz/0000-0003-0823-447X; Xie, Wei/0000-0003-1430-9191; Erice Cid, Carlos Francisco/0000-0002-6469-3200; Barbosa Trujillo, Diego Andrés/0000-0001-6607-4238A 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.eninfo:eu-repo/semantics/openAccessSearch for the Rare Decay D0 → Μ+ Μ- in Proton-Proton Collisions at √s=13.6 TeVArticle10.1103/zc76-rgcp2-s2.0-105019999785