New Structures in the J/J/ Mass Spectrum in Proton-Proton Collisions at sqrt[s]=13TeV.

A search is reported for near-threshold structures in the J/J/ invariant mass spectrum produced in proton-proton collisions at sqrt[s]=13TeV from data collected by the CMS experiment, corresponding to an integrated luminosity of 135fb^{-1}. Three structures are found, and a model with quantum interference among these structures provides a good description of the data. A new structure is observed with a local significance above 5 standard deviations at a mass of 6638_{-38}^{+43}(stat)_{-31}^{+16}(syst)MeV. Another structure with even higher significance is found at a mass of 6847_{-28}^{+44}(stat)_{-20}^{+48}(syst)MeV, which is consistent with the X(6900) resonance reported by the LHCb experiment and confirmed by the ATLAS experiment. Evidence for another new structure, with a local significance of 4.7 standard deviations, is found at a mass of 7134_{-25}^{+48}(stat)_{-15}^{+41}(syst)MeV. Results are also reported for a model without interference, which does not fit the data as well and shows mass shifts up to 150MeV relative to the model with interference.

Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J. W., Bergauer, T., Chatterjee, S., ... CMS Collaboration.

Hayrapetyan, A||Tumasyan, A||Adam, W||Andrejkovic, JW||Bergauer, T||Chatterjee, S||Damanakis, K||Dragicevic, M||Escalante Del Valle, A||Hussain, PS||Jeitler, M||Krammer, N||Liko, D||Mikulec, I||Schieck, J||Schöfbeck, R||Schwarz, D||Sonawane, M||Templ, S||Waltenberger, W||Wulz, C-E||Darwish, MR||Janssen, T||Van Mechelen, P||Bols, ES||D'Hondt, J||Dansana, S||De Moor, A||Delcourt, M||El Faham, H||Lowette, S||Makarenko, I||Müller, D||Sahasransu, AR||Tavernier, S||Tytgat, M||Van Putte, S||Vannerom, D||Clerbaux, B||De Lentdecker, G||Favart, L||Hohov, D||Jaramillo, J||Khalilzadeh, A||Lee, K||Mahdavikhorrami, M||Malara, A||Paredes, S||Pétré, L||Postiau, N||Thomas, L||Vanden Bemden, M||Vander Velde, C||Vanlaer, P||De Coen, M||Dobur, D||Hong, Y||Knolle, J||Lambrecht, L||Mestdach, G||Rendón, C||Samalan, A||Skovpen, K||Van Den Bossche, N||Wezenbeek, L||Benecke, A||Bruno, G||Caputo, C||Delaere, C||Donertas, IS||Giammanco, A||Jaffel, K||Jain, Sa||Lemaitre, V||Lidrych, J||Mastrapasqua, P||Mondal, K||Tran, TT||Wertz, S|

New Structures in the J/J/ Mass Spectrum in Proton-Proton Collisions at sqrt[s]=13TeV. Academic Article