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Stefkova, S. Stemmle, S. Stone, S. Stracka, S. Strokov, S. T'Jampens, S. Tolk, S. Valat, S. Vecchi, S. Zucchelli, T. Blake, T. Boettcher, T. Colombo, T.D. Nguyen, T. Evans, T. Fiutowski, T. Gershon, T. Gys, T. Hadavizadeh, T. Harrison, T.H. Hancock, T. Humair, T.J.V. Bowcock, T. Ketel, T. Kirn, T. Kvaratskheliya, T. Latham, T. Lesiak, T. Likhomanenko, T. Maltsev, T. Momb\\\"acher, T. Nakada, T. Nanut, T. Ovsiannikova, T. Pajero, T. Ruf, T. Schmelzer, T. Shears, T. Skwarnicki, T. Szumlak, T. Tekampe, T. Williams, U. Egede, U. Eitschberger, U. Marconi, U. Straumann, U. Uwer, V. Balagura, V. Batozskaya, V. Battista, V. Bellee, V. Bocci, V. Chekalina, V. Chobanova, V. Coco, V. Egorychev, V. Franco Lima, V. Gibson, V. Kudryavtsev, V. Lisovskyi, V. Macko, V. Matiunin, V. M\\\"uller, V. Obraztsov, V. Placinta, V. Pugatch, V. Renaudin, V. Romanovskiy, V. Salustino Guimaraes, V. Shevchenko, V.S. Kirsebom, V. Tisserand, V. Vagnoni, V.V. Gligorov, V. Volkov, V. Vorobyev, V. Zhukov, W. Baldini, W. Barter, W. Byczynski, W.C. Zhang, W. Dean, W. Funk, W. Hu, W. Huang, W. Hulsbergen, W. Krupa, W. Krzemien, W. Kucewicz, W. Parker, W. Qian, W. Wislicki, X. Cid Vidal, X. Guo, X. Han, X. Li, X. Liang, X. Liu, X. Lyu, X. Vilasis-Cardona, X. Yuan, X. Zhu, Y. Amhis, Y. Gan, Y. Gao, Y. Li, Y. Luo, Y. Sun, Yu. Guz, Y. Wang, Y. Xie, Y. Yao, Y. Zhang, Y. Zheng, Z. Ajaltouni, Z.C. Huard, Z. Li, Z. Mathe, Z. Ren, Z. Tang, Z. Wang, Z. Xu, Z. Yang","submitted_at":"2019-03-29T20:27:44Z","abstract_excerpt":"Using $pp$ collision data corresponding to an integrated luminosity of $8.5\\,\\mathrm{fb}^{-1}$ recorded by the LHCb experiment at centre-of-mass energies of $\\sqrt{s} = 7$, $8$ and $13\\mathrm{\\,Te\\kern -0.1em V}$, the observation of an excited $B_c^+$ state in the $B_c^+\\pi^+\\pi^-$ invariant-mass spectrum is reported. The observed peak has a mass of $6841.2 \\pm 0.6 {\\,\\rm (stat)\\,} \\pm 0.1 {\\,\\rm (syst)\\,} \\pm 0.8\\,(B_c^+) \\mathrm{\\,MeV}/c^2$, where the last uncertainty is due to the limited knowledge of the $B_c^+$ mass. It is consistent with expectations of the $B_c^{*}(2^{3}S_{1})^+$ state "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1904.00081","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ex","submitted_at":"2019-03-29T20:27:44Z","cross_cats_sorted":[],"title_canon_sha256":"9348a34f36556b697be91fbc647b8aa86a2ccec182240242e3bb059e7819e197","abstract_canon_sha256":"7e3b3ee3425659512d5124872c8ff4511d4d64c30cb959e68052eeb76f962d89"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:43:27.732193Z","signature_b64":"WJGoTdW5Jhndf1FTPd13LW7H13Rp5BU4oUgYGWp96qiWXUZKnMhVOeJ3DKhQ6ctb/K9+sbV6KNzhqs3VgqReAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"04b4360f195d300509121ae961d939834ea5ab44784b940507af5ab86202a977","last_reissued_at":"2026-05-17T23:43:27.731643Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:43:27.731643Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Observation of an excited $B_c^+$ state","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A.A. Alves Jr, A. Alfonso Albero, A. Artamonov, A. Baranov, A. Battig, A. Bay, A. Beiter, A. Berezhnoy, A. Bertolin, A. Birnkraut, A. Bizzeti, A.B. Morris, A. Bondar, A.B. Rodrigues, A. Brossa Gonzalo, A. Buonaura, A. Bursche, A. Camboni, A. Carbone, A. Cardini, A.C. dos Reis, A. Chubykin, A. Comerma-Montells, A. Contu, A. Crocombe, A. Danilina, A. Davis, A. Dendek, A. Di Canto, A. Dosil Su\\'arez, A. Dovbnya, A. Dziurda, A. Dzyuba, A. Ene, A. Falabella, A. Fernandez Prieto, A. Gallas Torreira, A. Golutvin, A. Gomes, A. Grecu, A. Guth, A. Heister, A. Hicheur, A. Inglessi, A. Inyakin, A. Jawahery, A. Kharisova, A.K. Kuonen, A. Lai, A. Leflat, A. Loi, A. Lupato, A. Lusiani, A. Malinin, A. Massafferri, A. Mathad, A. Mauri, A. McNab, A. Merli, A. M\\\"odden, A. Mogini, A. Nandi, A. Oblakowska-Mucha, A. Ossowska, A. Oyanguren, A. Palano, A. Papanestis, A. Pastore, A. Pearce, A. Pellegrino, A. Petrolini, A. Petrov, A. Piucci, A. Poluektov, A. Popov, A. Puig Navarro, A. Robert, A. Rollings, A. Romero Vidal, A. Sarti, A. Satta, A. Schopper, A. Sciubba, A. Semennikov, A. Sergi, A. Seuthe, A. Stocchi, A. Szabelski, A. Trisovic, A. Tsaregorodtsev, A. Tully, A. Ukleja, A. Usachov, A. Ustyuzhanin, A. Vagner, A. Valassi, A. Vasiliev, A. Venkateswaran, A. Vitkovskiy, A. Vollhardt, A. Vorobyev, A. Weiden, A. Xu, A. Zhelezov, B. Adeva, B. Audurier, B. Batsukh, B. Couturier, B. Delaney, B. Dey, B. Garcia Plana, B.G. Siddi, B. Hamilton, B. Jost, B. Khanji, B.K. Jashal, B. Leverington, B. Malecki, B. Maurin, B. Meadows, B. Pietrzyk, B. Quintana, B. Rachwal, B.R. Gruberg Cazon, B. Saitta, B. Sanmartin Sedes, B. Schmidt, B. Sciascia, B. Souza De Paula, B. Spaan, B. Voneki, C.A. Aidala, C. Abell\\'an Beteta, C. Betancourt, C. Bozzi, C. Burr, C.B. Van Hulse, C. Chen, C. D'Ambrosio, C. F\\\"arber, C. Fitzpatrick, C. Frei, C. Gaspar, C. G\\\"obel, C. Gotti, C. Gu, C. Hadjivasiliou, C. Haen, C. Hasse, C.H. Murphy, C.J.G. Onderwater, C. Joram, C. Khurewathanakul, C. Langenbruch, C. Lazzeroni, C.L. Da Silva, C. Marin Benito, C. Matteuzzi, C.M. Costa Sobral, C. Meaux, C. Nguyen-Mau, C. Parkes, C. Patrignani, C. Prouve, C. Remon Alepuz, C.R. Jones, C. Sanchez Gras, C. Sanchez Mayordomo, C. Santamarina Rios, C. Satriano, C.T. Dean, C. V\\'azquez Sierra, C. Weisser, D.A. Milanes, D. Berninghoff, D. Bobulska, D. Brundu, D.C. Craik, D. Decamp, D. Derkach, D. Dutta, D. Fazzini, D. Galli, D. Gascon, D. Gerick, D. Gerstel, D. Golubkov, D.H. Campora Perez, D. Hill, D. Hutchcroft, D. Hynds, D. Johnson, D. Lacarrere, D. Lancierini, D. Loh, D. Lucchesi, D. Maisuzenko, D. Marangotto, D. Martinez Santos, D. Melnychuk, D. M\\\"uller, D. Murray, D. Pereima, D. Pinci, D.P. O'Hanlon, D. Popov, D.R. Ward, D. Savrina, D.S. Mitzel, D. Tonelli, D. Vieira, D. vom Bruch, D. Websdale, D. Xiao, D.Y. Tou, D. Zhang, E. Aslanides, E. Ben-Haim, E. Bertholet, E. Buchanan, E. Cogneras, E. Dall'Occo, E. Gabriel, E. Gersabeck, E. Govorkova, E. Graug\\'es, E. Graverini, E. Gushchin, E. Jans, E. 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Yang","submitted_at":"2019-03-29T20:27:44Z","abstract_excerpt":"Using $pp$ collision data corresponding to an integrated luminosity of $8.5\\,\\mathrm{fb}^{-1}$ recorded by the LHCb experiment at centre-of-mass energies of $\\sqrt{s} = 7$, $8$ and $13\\mathrm{\\,Te\\kern -0.1em V}$, the observation of an excited $B_c^+$ state in the $B_c^+\\pi^+\\pi^-$ invariant-mass spectrum is reported. The observed peak has a mass of $6841.2 \\pm 0.6 {\\,\\rm (stat)\\,} \\pm 0.1 {\\,\\rm (syst)\\,} \\pm 0.8\\,(B_c^+) \\mathrm{\\,MeV}/c^2$, where the last uncertainty is due to the limited knowledge of the $B_c^+$ mass. 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