LHCb CollaborationAaij, R.Abdelmotteleb, A. S.W.Abellan Beteta, C.Abudinén, F.Ackernley, T.Adefisoye, A. A.Adeva, B.Adinolfi, M.Adlarson, P.Agapopoulou, C.Aidala, C. A.Ajaltouni, Z.Akar, S.Akiba, K.Albicocco, P.Albrecht, J.Alessio, F.Aliouche, Z.Alvarez Cartelle, P.Amalric, R.Amato, S.Amey, J. L.Amhis, Y.An, L.Anderlini, L.Andersson, M.Andreola, P.Andreotti, M.Andres Estrada, S.Anelli, A.Ao, D.Archilli, F.Areg, Z.Argenton, M.Arguedas Cuendis, S.Artamonov, A.Artuso, M.Aslanides, E.Ataíde Da Silva, R.Atzeni, M.Audurier, B.Authier, J. A.Bacher, D.Bachiller Perea, I.Bachmann, S.Bachmayer, M.Back, J. J.Baladron Rodriguez, P.Balagura, V.Balboni, A.Baldini, W.Balzani, L.Bao, H.Baptista de Souza Leite, J.Barbero Pretel, C.Barbetti, M.Barbosa, I. R.Barlow, R. J.Barnyakov, M.Barsuk, S.Barter, W.Bartz, J.Bashir, S.Batsukh, B.Battista, P. B.Bay, A.Beck, A.Becker, M.Bedeschi, F.Bediaga, I. B.Behling, N. A.Belin, S.Belous, K.Belov, I.Belyaev, I.Benane, G.Bencivenni, G.Ben-Haim, E.Berezhnoy, A.Bernet, R.Bernet Andres, S.Bertolin, A.Betancourt, C.Betti, F.Bex, J.Bezshyiko, IaBezshyyko, O.Bhom, J.Bieker, M. S.Biesuz, N. V.Billoir, P.Biolchini, A.Birch, M.Bishop, F. C.R.Bitadze, A.Bizzeti, A.Blake, T.Blanc, F.Blank, J. E.Blusk, S.Bocharnikov, V.Boelhauve, J. A.Boente Garcia, O.Boettcher, T.Bohare, A.Boldyrev, A.Bolognani, C. S.Bolzonella, R.Bonacci, R. B.Bondar, N.Bordelius, A.Borgato, F.Borghi, S.Borsato, M.Borsuk, J. T.Bottalico, E.Bouchiba, S. A.Bovill, M.Bowcock, T. J.V.Boyer, A.Bozzi, C.Brandenburg, J. D.Brea Rodriguez, A.Breer, N.Brodzicka, J.Brossa Gonzalo, A.Brown, J.Brundu, D.Buchanan, E.Buonincontri, L.Burgos Marcos, M.Burke, A. T.Burr, C.Butter, J. S.Buytaert, J.Byczynski, W.Cadeddu, S.Cai, H.Cai, Y.Caillet, A.Calabrese, R.Calderon Ramirez, S.Calefice, L.Cali, S.Calvi, M.Calvo Gomez, M.Camargo Magalhaes, P.Cambon Bouzas, J. I.Campana, P.Campora Perez, D. H.Campoverde Quezada, A. F.Capelli, S.Capriotti, L.Caravaca-Mora, R.Carbone, A.Carcedo Salgado, L.Cardinale, R.Cardini, A.Carniti, P.Carus, L.Casais Vidal, A.Caspary, R.Casse, G.Cattaneo, M.Cavallero, G.Cavallini, V.Celani, S.Cesare, S.Chadwick, A. J.Chahrour, I.Chang, H.Charles, M.Charpentier, PhChatzianagnostou, E.Cheaib, R.Chefdeville, M.Chen, C.Chen, J.Chen, S.Chen, Z.Cherif, M.Chernov, A.Chernyshenko, S.Chiotopoulos, X.Chobanova, V.Chrzaszcz, M.Chubykin, A.Chulikov, V.Ciambrone, P.Cid Vidal, X.Ciezarek, G.Cifra, P.Clarke, P. E.L.Clemencic, M.Cliff, H. V.Closier, J.Cocha Toapaxi, C.Coco, V.Cogan, J.Cogneras, E.Cojocariu, L.Collaviti, S.Collins, P.Colombo, T.Colonna, M.Comerma-Montells, A.Congedo, L.Connaughton, J.Contu, A.Cooke, N.Coronel, C.Corredoira, I.Correia, A.Corti, G.Cottee Meldrum, J.Couturier, B.Craik, D. C.Cruz Torres, M.Curras Rivera, E.Currie, R.Da Silva, C. L.Dadabaev, S.Dai, L.Dai, X.Dall’Occo, E.Dalseno, J.D’Ambrosio, C.Daniel, J.d’Argent, P.Darze, G.Davidson, A.Davies, J. E.De Aguiar Francisco, O.De Angelis, C.De Benedetti, F.de Boer, J.De Bruyn, K.De Capua, S.De Cian, M.De Freitas Carneiro Da Graca, U.De Lucia, E.De Miranda, J. M.De Paula, L.De Serio, M.De Simone, P.De Vellis, F.de Vries, J. A.Debernardis, F.Decamp, D.Dekkers, S.Del Buono, L.Delaney, B.Dembinski, H. P.Deng, J.Denysenko, V.Deschamps, O.Dettori, F.Dey, B.Di Nezza, P.Diachkov, I.Didenko, S.Ding, S.Ding, Y.Dittmann, L.Dobishuk, V.Docheva, A. D.Doheny, A.Dong, C.Donohoe, A. M.Dordei, F.dos Reis, A. C.Dowling, A. D.Dreyfus, L.Duan, W.Duda, P.Dudek, M. W.Dufour, L.Duk, V.Durante, P.Duras, M. M.Durham, J. M.Durmus, O. D.Dziurda, A.Dzyuba, A.Easo, S.Eckstein, E.Egede, U.Egorychev, A.Egorychev, V.Eisenhardt, S.Ejopu, E.Eklund, L.Elashri, M.Ellbracht, J.Ely, S.Ene, A.Eschle, J.Esen, S.Evans, T.Fabiano, F.Faghih, S.Falcao, L. 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V.Göbel, C.Golinka-Bezshyyko, L.Golobardes, E.Golubkov, D.Golutvin, A.Gomez Fernandez, S.Gomulka, W.Gonçales Vaz, I.Goncalves Abrantes, F.Goncerz, M.Gong, G.Gooding, J. A.Gorelov, I. V.Gotti, C.Govorkova, E.Grabowski, J. P.Granado Cardoso, L. A.Graugés, E.Graverini, E.Grazette, L.Graziani, G.Grecu, A. T.Greeven, L. M.Grieser, N. A.Grillo, L.Gromov, S.Gu, C.Guarise, M.Guerry, L.Guliaeva, V.Günther, P. A.Guseinov, A. K.Gushchin, E.Guz, Y.Gys, T.Habermann, K.Hadavizadeh, T.Hadjivasiliou, C.Haefeli, G.Haen, C.Hallett, G.Hamilton, P. M.Hammerich, J.Han, Q.Han, X.Hansmann-Menzemer, S.Hao, L.Harnew, N.Harris, T. H.Hartmann, M.Hashmi, S.He, J.Hemmer, F.Henderson, C.Henderson, R.Henderson, R. D.L.Hennequin, A. M.Hennessy, K.Henry, L.Herd, J.Herrero Gascon, P.Heuel, J.Hicheur, A.Hijano Mendizabal, G.Horswill, J.Hou, R.Hou, Y.Houston, D. C.Howarth, N.Hu, J.Hu, W.Hu, X.Hulsbergen, W.Hunter, R. J.Hushchyn, M.Hutchcroft, D.Idzik, M.Ilin, D.Ilten, P.Iniukhin, A.Ishteev, A.Ivshin, K.Jage, H.Jaimes Elles, S. J.Jakobsen, S.Jans, E.Jashal, B. K.Jawahery, A.Jayaweera, C.Jevtic, V.Jia, Z.Jiang, E.Jiang, X.Jiang, Y.Jiang, Y. J.Jindal, N.John, M.John Rubesh Rajan, A.Johnson, D.Jones, C. R.Jones, T. P.Joshi, S.Jost, B.Juan Castella, J.Jurik, N.Juszczak, I.Kaminaris, D.Kandybei, S.Kane, M.Kang, Y.Kar, C.Karacson, M.Kauniskangas, A.Kautz, J. W.Kazanecki, M. K.Keizer, F.Kenzie, M.Ketel, T.Khanji, B.Kharisova, A.Kholodenko, S.Khreich, G.Kirn, T.Kirsebom, V. S.Kitouni, O.Klaver, S.Kleijne, N.Klimaszewski, K.Kmiec, M. 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H.Lopez Huertas, A.Lopez Iribarnegaray, C.López Soliño, S.Lu, Q.Lucarelli, C.Lucchesi, D.Lucio Martinez, M.Luo, Y.Lupato, A.Luppi, E.Lynch, K.Lyu, X. R.Ma, G. M.Maccolini, S.Machefert, F.Maciuc, F.Mack, B.Mackay, I.Mackey, L. M.Madhan Mohan, L. R.Madurai, M. J.Magdalinski, D.Maisuzenko, D.Malczewski, J. J.Malde, S.Malentacca, L.Malinin, A.Maltsev, T.Manca, G.Mancinelli, G.Mancuso, C.Manera Escalero, R.Manganella, F. M.Manuzzi, D.Marangotto, D.Marchand, J. F.Marchevski, R.Marconi, U.Mariani, E.Mariani, S.Marin Benito, C.Marks, J.Marshall, A. M.Martel, L.Martelli, G.Martellotti, G.Martinazzoli, L.Martinelli, M.Martinez Gomez, D.Martinez Santos, D.Martinez Vidal, F.Martorell i Granollers, A.Massafferri, A.Matev, R.Mathad, A.Matiunin, V.Matteuzzi, C.Mattioli, K. R.Mauri, A.Maurice, E.Mauricio, J.Mayencourt, P.Mazorra de Cos, J.Mazurek, M.McCann, M.McGrath, T. H.McHugh, N. T.McNab, A.McNulty, R.Meadows, B.Meier, G.Melnychuk, D.Mendoza Granada, D.Meng, F. 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B.Van Laak, R.van Veghel, M.Vasquez, G.Vazquez Gomez, R.Vazquez Regueiro, P.Vázquez Sierra, C.Vecchi, S.Velthuis, J. J.Veltri, M.Venkateswaran, A.Verdoglia, M.Vesterinen, M.Vetens, W.Vico Benet, D.Vidrier Villalba, P.Vieites Diaz, M.Vilasis-Cardona, X.Vilella Figueras, E.Villa, A.Vincent, P.Vivacqua, B.Volle, F. C.vom Bruch, D.Voropaev, N.Vos, K.Vrahas, C.Wagner, J.Walsh, J.Walton, E. J.Wan, G.Wang, A.Wang, B.Wang, C.Wang, G.Wang, H.Wang, J.Wang, J.Wang, J.Wang, J.Wang, M.Wang, N. W.Wang, R.Wang, X.Wang, X.Wang, X. W.Wang, Y.Wang, Y.Wang, Y. H.Wang, Z.Wang, Z.Wang, Z.Ward, J. A.Waterlaat, M.Watson, N. K.Websdale, D.Wei, Y.Wendel, J.Westhenry, B. D.C.White, C.Whitehead, M.Whiter, E.Wiederhold, A. R.Wiedner, D.Wiegertjes, M. A.Wilkinson, G.Wilkinson, M. K.Williams, M.Williams, M. J.Williams, M. R.J.Williams, R.Williams, S.Williams, Z.Wilson, F. F.Winn, M.Wislicki, W.Witek, M.Witola, L.Wolf, T.Wormser, G.Wotton, S. A.Wu, H.Wu, J.Wu, X.Wu, Y.Wu, Z.Wyllie, K.Xian, S.Xiang, Z.Xie, Y.Xing, T. X.Xu, A.Xu, L.Xu, L.Xu, M.Xu, Z.Xu, Z.Xu, Z.Yang, K.Yang, X.Yang, Y.Yang, Z.Yeroshenko, V.Yeung, H.Yin, H.Yin, X.Yu, C. Y.Yu, J.Yuan, X.Yuan, Y.Zaffaroni, E.Zavertyaev, M.Zdybal, M.Zenesini, F.Zeng, C.Zeng, M.Zhang, C.Zhang, D.Zhang, J.Zhang, L.Zhang, R.Zhang, S.Zhang, S. L.Zhang, Y.Zhang, Y. Z.Zhang, Z.Zhao, Y.Zhelezov, A.Zheng, S. Z.Zheng, X. Z.Zheng, Y.Zhou, T.Zhou, X.Zhou, Y.Zhovkovska, V.Zhu, L. Z.Zhu, X.Zhu, X.Zhu, Y.Zhukov, V.Zhuo, J.Zou, Q.Zuliani, D.Zunica, G.2025-12-292025-12-292025-12-232025-12-0510.1103/fc8j-tb8k2-s2.0-105024949672https://infoscience.epfl.ch/handle/20.500.14299/257376The observation of a wide peaking structure in the (Formula presented) mass spectrum is reported using proton-proton collision data collected by the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of (Formula presented). The statistical significance over the background-only hypothesis exceeds seven standard deviations. The width of the observed structure is larger than the expectation from a single-peak hypothesis, and is well described by an effective minimal model consisting of two narrow peaks located at (Formula presented) and (Formula presented). The uncertainty terms are statistical, systematic, and associated to the knowledge of the (Formula presented) mass, respectively. The measured peak locations are in line with theoretical predictions for lowest excited (Formula presented)-wave (Formula presented) states, marking the first observation of orbitally excited beauty-charm mesons and providing important insights into the internal dynamics of hadrons containing two heavy quarks.truetext::journal::journal article::research article