Search for new resonances decaying to pairs of merged diphotons in proton-proton collisions at √&lt;em&gt;s&lt;/em&gt; = 13 TeV

Hayrapetyan, A.; Tumasyan, A.; Adam, W.; Andrejkovic, J.W.; Bergauer, T.; Chatterjee, S.; Damanakis, K.; Dragicevic, M.; Hussain, P.S.; Jeitler, M.; Bevilacqua, T.; Caminada, L.; Ebrahimi, A.; Erdmann, W.; Horisberger, R.; Ingram, Q.; Kaestli, H.C.; Kotlinski, D.; Lange, C.; Missiroli, M.; Noehte, L.; Rohe, T.; Zhokin, A.

doi:10.1103/PhysRevLett.134.041801

Search for new resonances decaying to pairs of merged diphotons in proton-proton collisions at √s = 13 TeV

Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Bevilacqua T, Caminada L, Ebrahimi A, Erdmann W, Horisberger R, Ingram Q, Kaestli HC, Kotlinski D, Lange C, Missiroli M, Noehte L, Rohe T, Zhokin A, et al.

Citation

Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J. W., Bergauer, T., Chatterjee, S., … Zhokin, A. (2025). Search for new resonances decaying to pairs of merged diphotons in proton-proton collisions at √s = 13 TeV. Physical Review Letters, 134(4), 041801 (20 pp.). https://doi.org/10.1103/PhysRevLett.134.041801

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:68821

A search is presented for an extended Higgs sector with two new particles, X and ϕ, in the process X → ϕϕ → (γγ)(γγ). Novel neural networks classify events with diphotons that are merged and determine the diphoton masses. The search uses LHC proton-proton collision data at √s = 13 TeV collected with the CMS detector, corresponding to an integrated luminosity of 138 fb−1. No evidence of such resonances is seen. Upper limits are set on the production cross section for m_X between 300 and 3000 GeV and mϕ/m_X between 0.5% and 2.5%, representing the most sensitive search in this channel.