Search for \(B\) Mesogenesis at BABAR

• Published in: arXiv.org
• Main Authors: Collaboration, BABAR, Lees, J P, Tisserand, V, Brown, D N, Kolomensky, Yu G, Fritsch, M, Koch, H, Hearty, C, Mattison, T S, So, R Y, Druzhinin, V P, Kozyrev, E A, Onuchin, A P, Serednyakov, S I, Skovpen, Yu I, K Yu Todyshev, Lankford, A J, Eisner, A M, Vazquez, W Panduro, Chao, D S, Echenard, B, Hitlin, D G, Miyashita, T S, Oyang, J, Pushpawela, B G, Sokoloff, M D, Verderi, M, Bozzi, C, Calabrese, R, Fioravanti, E, Luppi, E, Santoro, V, Patteri, P, Peruzzi, I M, Rotondo, M, Patrignani, C, Lacker, H M, Mallik, U, Chen, C, Cochran, J, Lange, D J, Coleman, J P, Hutchcroft, D E, Cowan, G, Davis, C L, Denig, A G, Schubert, K R, Lafferty, G D, Seddon, R M, Godang, R, Summers, D J, Taras, P, Raven, G, LoSecco, J M, Honscheid, K, Gaz, A, Margoni, M, Posocco, M, Akar, S, Chauveau, J, Marchiori, G, Biasini, M, Carpinelli, M, Casarosa, G, ti, F, Giorgi, M A, Lusiani, A, Rama, M, Smith, A J S, Faccini, R, Ferrarotto, F, Ferroni, F, Dittrich, S, Heß, M, Voß, C, Adye, T, Wilson, F F, Vasseur, G, Cartaro, C, Dunwoodie, W, Fulsom, B G, Randle-Conde, A, Sekula, S J, Ahmed, H, Puccio, E M T, Alam, M S, Ernst, J A, Soffer, A, Schwitters, R F, Lou, X C, De Mori, F, Filippi, A, Gamba, D, Vitale, L, Martinez-Vidal, F, Bernlochner, F U, Nugent, I M, Roney, J M, Sobie, R J, Latham, T E
• Format: Paper
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 01.02.2023
• Subjects: Antimatter; Baryons; Dark matter; Particle decay
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2302.00208

A new mechanism has been proposed to simultaneously explain the presence of dark matter and the matter-antimatter asymmetry in the universe. This scenario predicts exotic \(B\) meson decays into a baryon and a dark sector anti-baryon (\(\psi_D\)) with branching fractions accessible at \(B\) factories. We present a search for \(B \rightarrow \Lambda \psi_D\) decays using data collected by the \(BABAR\) experiment at SLAC. This reaction is identified by fully reconstructing the accompanying \(B\) meson and requiring the presence of a single \(\Lambda\) baryon in the remaining particles. No significant signal is observed, and bounds on the \(B \rightarrow \Lambda \psi_D\) branching fraction are derived in the range \(0.13 - 5.2\times 10^{-5}\) for \(1.0 < m_{\psi_D} < 4.2\) GeV/\(c^{2}\). These results set strong constraints on the parameter space allowed by the theory.