Searches for exclusive Higgs boson decays into D⁎γ and Z boson decays into D0γ and Ks0γ in pp collisions at s=13TeV with the ATLAS detector

• Published in: Physics letters. B Vol. 855
• Main Authors: Ahuja, S., Akiyama, D., Alegria, Z.L., Antipov, E., Austrup, V.A., Barisits, M-S., Beaucamp, J.Y., Bergeaas Kuutmann, E., Booth, C.D., Brost, E., Camarri, P., Chen, B., Chudoba, J., Cortes-Gonzalez, A., Czodrowski, P., Damp, J., De Groot, N., Deutsch, C., Di Domenico, A., Djobava, T., Dona, K.M., Dong, B., Duperrin, A., Ezzarqtouni, S., Fedin, O.L., Gekow, A., Gocke, B., Goshaw, A.T., Gottardo, C.A., Gray, H.M., Grundy, J.C., Guo, J., Gwilliam, C.B., Hu, Q., Huebner, M., Huth, J., Hyneman, R., Ibragimov, I., Iengo, P., Jia, X., Karkanias, I., Kennedy, P.D., Kim, D.W., Kirchhoff, A., Kneringer, E., Kolay, O., Kopeliansky, R., Koulouris, A., Kumari, P., Lancaster, A.N., Le, B., Lenz, T., Leroy, C., Li, C-Q., Li, H., Lindley, R.E., Liu, Q., Löschcke Centeno, G., Lounis, A., Luongo, N.A., Lutz, M.S., Maeda, J., Maguire, H., Mancini, G., Meroni, C., Mikenberg, G., Montereali, F., Moskalets, T., Nayak, R., Nishu, N., Oleiro Seabra, L.F., Orr, R.S., Pater, J.R., Quetant, G., Rafanoharana, D., Ribaric, N., Roda, C., Romano, M., Sala, A., Santoni, C., Sardain, J., Sawyer, L., Sayago Galvan, I., Schramm, S., Shah, A.H., Shimmin, C.O., Sinervo, P., Singh, S., Straessner, A., Tasevsky, M., Tojo, J., Tzovara, E., Varni, C., Vazquez Schroeder, T., Vozak, M., Vranjes, N., Wahdan, S., Weirich, M., Wyatt, T.R.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-08-2024
• Subjects: Fysik; Natural Sciences; Naturvetenskap; Physical Sciences; Subatomic Physics; Subatomär fysik
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/j.physletb.2024.138762

Searches for exclusive decays of the Higgs boson into D⁎γ and of the Z boson into D0γ and Ks0γ can probe flavour-violating Higgs boson and Z boson couplings to light quarks. Searches for these decays are performed with a pp collision data sample corresponding to an integrated luminosity of 136.3 fb−1 collected at s=13TeV between 2016–2018 with the ATLAS detector at the CERN Large Hadron Collider. In the D⁎γ and D0γ channels, the observed (expected) 95% confidence-level upper limits on the respective branching fractions are B(H→D⁎γ)<1.0(1.2)×10−3, B(Z→D0γ)<4.0(3.4)×10−6, while the corresponding results in the Ks0γ channel are B(Z→Ks0γ)<3.1(3.0)×10−6.