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Gomes, A. Grecu, A. Jaeger, A. Keune, A. Kozlinskiy, A. Lai, A. Leflat, A. Mac Raighne, A. Martens, A. Mart\\'in S\\'anchez, A. Massafferri, A. Mazurov, A. Nomerotski, A. Novoselov, A. Oblakowska-Mucha, A. Palano, A. Papanestis, A. Pazos Alvarez, A. Pellegrino, A. P\\'erez-Calero Yzquierdo, A. Petrolini, A. Phan, A. Poluektov, A. Powell, A. Puig Navarro, A. Richards, A. Sarti, A. Satta, A. Schopper, A. Sciubba, A. Semennikov, A. Shires, A. Solomin, A. Sparkes, A. Tsaregorodtsev, A. Ukleja, A. Vollhardt, A. Vorobyev, A. Zhelezov, A. Zvyagin, B. Adeva, B. Couturier, B. Gui, B. Jean-Marie, B. Jost, B. Khanji, B. K. Pal, B. Liu, B. Maynard, B. Muryn, B. Muster, B. Pietrzyk, B. Pie Valls, B. Popovici, B. Rakotomiaramanana, B. Saitta, B. Sanmartin Sedes, B. Schmidt, B. Sciascia, B. Souza De Paula, B. Spaan, B. Storaci, B. Viaud, C. Abellan Beteta, C. Adrover, C. Barschel, C. Bauer, C. Blanks, C. Bozzi, C. Coca, C. D'Ambrosio, C. Deplano, C. F\\\"arber, C. Farinelli, C. Fitzpatrick, C. Frei, C. Gaspar, C. G\\\"obel, C. Hadjivasiliou, C. Haen, Ch. Cauet, Ch. Elsasser, C. J. Parkinson, C. Langenbruch, C. Lazzeroni, C. Linn, C. Matteuzzi, C. Nguyen-Mau, C. Parkes, C. Patrignani, C. Pavel-Nicorescu, C. Potterat, C. R. Jones, C. Salzmann, C. Santamarina Rios, C. Satriano, C. Thomas, C. Vo{\\ss}, D. A. Milanes, D. A. Roa Romero, D. Brett, D. Craik, D. Decamp, D. Derkach, D. Dossett, D. Elsby, D. Esperante Pereira, D. Galli, D. Gascon, D. Golubkov, D. Hutchcroft, D. Hynds, D. Johnson, D. Lacarrere, D. Lambert, D. L. Perego, D. Martinez Santos, D. Moran, D. Pinci, D. Popov, D. R. Ward, D. Savrina, D. Souza, D. van Eijk, D. Vieira, D. Volyanskyy, D. Voong, D. Websdale, D. Wiedner, E. Aslanides, E. Ben-Haim, E. Cogneras, E. Graug\\'es, E. Greening, E. Gushchin, E. Hicks, E. Jans, E. Lanciotti, E. Lopez Asamar, E. Maurice, E. Perez Trigo, E. Picatoste Olloqui, E. Polycarpo, E. Rodrigues, E. Santovetti, E. Smith, E. Teodorescu, E. Thomas, E. Tournefier, E. van Herwijnen, F. Alessio, F. Archilli, F. Blanc, F. Dettori, F. Domingo Bonal, F. Dordei, F. Dupertuis, F. Eisele, F. Fontanelli, F. F. Wilson, F. Jansen, F. Jing, F. J. P. Soler, F. Kruse, F. Machefert, F. Maciuc, F. Muheim, F. Polci, F. Rodrigues, F. Soomro, F. Stagni, F. Teubert, F. Xing, F. Zhang, G. A. Cowan, G. Alkhazov, G. Auriemma, G. Bencivenni, G. Carboni, G. Casse, G. Ciezarek, G. Corti, G. D. Patel, G. Fardell, G. Graziani, G. Haefeli, G. J. Rogers, G. Krocker, G. Lafferty, G. Lanfranchi, G. Liu, G. Manca, G. Mancinelli, G. Martellotti, G. McGregor, G. N. Patrick, G. Passaleva, G. Penso, G. Pessina, G. Polok, G. Raven, G. Sabatino, G. Valenti, G. Wilkinson, H. Brown, H. Degaudenzi, H. Dijkstra, H. Gordon, H. Lu, H. Ruiz, H. Schindler, H. V. Cliff, H. Voss, I. Bediaga, I. Belyaev, I. Burducea, I. De Bonis, I. El Rifai, I. Komarov, I. Mous, I. Nasteva, I. Raniuk, I. R. Kenyon, I. Sepp, I. Shapoval, I. Videau, I. V. Machikhiliyan, J. A. Hernando Morata, J. Albrecht, J. Anderson, J. Beddow, J. Benton, J. Blouw, J. Bressieux, J. Buytaert, J-C. Garnier, J. Closier, J. Cogan, J. Dickens, J. Garofoli, J. Garra Tico, J. Harrison, J. He, J. H. Lopes, J. H. Rademacker, J. Imong, J. J. Back, J. J. Saborido Silva, J. J. Velthuis, J. Keaveney, J. Lefran\\c{c}ois, J. Luisier, J. Magnin, J. Marks, J. McCarthy, J. M. de Miranda, J. Merkel, J. Molina Rodriguez, J. M. Otalora Goicochea, J. Mylroie-Smith, J. Palacios, J. Panman, J.-P. Lees, J. Prisciandaro, J. Rouvinet, J. Serrano, J. van den Brand, J. van Leerdam, J. van Tilburg, J. Visniakov, J. von Loeben, J. Wang, J. Wicht, J. Wishahi, K. Belous, K. Carvalho Akiba, K. Ciba, K. De Bruyn, K. Hennessy, K. Kreplin, K. Kruzelecki, K. M\\\"uller, K. Rinnert, K. Senderowska, K. Sobczak, K. Wyllie, L. A. Granado Cardoso, L. Carson, L. Del Buono, L. De Paula, L. Eklund, L. Garrido, LHCb collaboration: R. Aaij, L. Kravchuk, L. Li, L. Li Gioi, L. Martin, L. Shekhtman, L. Wiggers, L. Zhang, L. Zhong, M. Adinolfi, M. Alexander, M. Artuso, M. Benayoun, M. Britsch, M. Calvi, M. Calvo Gomez, M. Cattaneo, M. Charles, M. Chrzaszcz, M. Clemencic, M. Coombes, M. De Cian, M. Deckenhoff, M. Ferro-Luzzi, M. Fontana, M. Frank, M. Frosini, M. Gandelman, M. Gersabeck, M. Grabalosa G\\'andara, M. Hoballah, M.-H. Schune, M. Jahjah Hussein, M. John, M. Kaballo, M. Karacson, M. Knecht, M. Korolev, M. Kreps, M. Kucharczyk, M. Lieng, M. Liles, M. Martinelli, M. Matveev, M. Meissner, M. Merk, M. M. Reid, M. Needham, M. Nicol, M.-N. Minard, M.-O. Bettler, M. Orlandea, M. Palutan, M. Pappagallo, M. Patel, M. Pepe Altarelli, M. Perrin-Terrin, M. Plo Casasus, M. P. Williams, M. Rosello, M. Sannino, M. Sapunov, M. Savrie, M. Schiller, M. Schlupp, M. Schmelling, M. Seco, M. Shapkin, M. Smith, M. S. Rangel, M. Straticiuc, M. Szczekowski, M. Teklishyn, M. Tobin, M. T. Tran, M. Ubeda Garcia, M. van Beuzekom, M. Veltri, M. Vesterinen, M. Whitehead, M. Williams, M. Witek, M. Zangoli, M. Zavertyaev, N. A. Smith, N. Bondar, N. Chiapolini, N. Gauvin, N. Harnew, N. H. Brook, N. K. Watson, N. Lopez-March, N. Mangiafave, N. Neufeld, N. Nikitin, N. Sagidova, N. Serra, N. Torr, N. Tuning, O. Aquines Gutierrez, O. Callot, O. Deschamps, O. Francisco, O. Gr\\\"unberg, O. Kochebina, O. Leroy, O. Maev, O. Okhrimenko, O. Schneider, O. Shevchenko, O. Steinkamp, O. Yushchenko, P. Alvarez Cartelle, P. Campana, P. Chen, P. Collins, P. David, P. De Simone, P. Diniz Batista, P. E. L. Clarke, P. F. Harrison, P. Gandini, Ph. Charpentier, P. Henrard, Ph. Ghez, P. Hopchev, P. Hunt, P. Ilten, P. Jaton, P. Koppenburg, P. Krokovny, P. M. Bj{\\o}rnstad, P. Morawski, P. Naik, P. N. Y. David, P. Owen, P. Perret, P. Robbe, P. Rodriguez Perez, P. Sail, P. Schaack, P. Seyfert, P. Shatalov, P. Spradlin, P. Szczypka, P. Vazquez Regueiro, R. B. Appleby, R. Bernet, R. Cardinale, R. Currie, R. Dzhelyadin, R. Ekelhof, R. F. Koopman, R. Forty, R. Gauld, R. Graciani Diaz, R. Jacobsson, R. J. Barlow, R. Lef\\`evre, R. Le Gac, R. Lindner, R. M\\\"arki, R. McNulty, R. M. D. Mamunur, R. Mountain, R. Muresan, R. Nandakumar, R. Oldeman, R. Plackett, R. Santacesaria, R. Santinelli, R. Schwemmer, R. S. Huston, R. Silva Coutinho, R. Vazquez Gomez, R. Waldi, R. Wallace, R. W. Lambert, R. Young, S. Ali, S. Amato, S. A. Wotton, S. Bachmann, S. Barsuk, S. Belogurov, S. Benson, S. Bifani, S. Blusk, S. Borghi, S. Cadeddu, S. C. Haines, S. De Capua, S. Donleavy, S. Easo, S. Eidelman, S. Eisenhardt, S. Farry, S. Filippov, S. Furcas, S. Gregson, S. Hansmann-Menzemer, S. Kandybei, S. Malde, S. Monteil, S. Oggero, S. Ogilvy, S. Perazzini, S. Playfer, S. Redford, S. Ricciardi, S. Roiser, S. Schleich, S. Stahl, S. Stoica, S. Stone, S. Swientek, S. T. Harnew, S. T'Jampens, S. Tolk, S. Topp-Joergensen, S. Tourneur, S. Vecchi, S. Wandernoth, S. Wright, S. Wu, T. Bird, T. Blake, T. Brambach, T. Britton, T. Gershon, T. Gys, T. Hampson, T. Hartmann, Th. Bauer, T. Huse, T. J. V. Bowcock, T. Ketel, T. Kvaratskheliya, T. Latham, T. Lesiak, T. M. Karbach, T. Nakada, T. Nikodem, T. 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Yang","submitted_at":"2012-05-15T15:44:52Z","abstract_excerpt":"The isospin asymmetries of $B \\to K^{(*)}\\mu^+\\mu^-$ decays and the partial branching fractions of $B^0 \\to K^0\\mu^+\\mu^-$ and $B^+ \\to K^{*+}\\mu^+\\mu^-$ are measured as a function of the di-muon mass squared $q^2$ using an integrated luminosity of 1.0 fb$^{-1}$ collected with the LHCb detector. The $B \\to K\\mu^+\\mu^-$ isospin asymmetry integrated over $q^2$ is negative, deviating from zero with over 4 $\\sigma$ significance. The $B \\to K^{*}\\mu^+\\mu^-$ decay measurements are consistent with the Standard Model prediction of negligible isospin asymmetry. The observation of the decay $B^0 \\to K^0"},"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":"1205.3422","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"hep-ex","submitted_at":"2012-05-15T15:44:52Z","cross_cats_sorted":[],"title_canon_sha256":"4b15dbf3222044f2457a1e7e5dc208e1badb858b9dcbdf6175d1c27641b99c71","abstract_canon_sha256":"762ed9887d1154fad304da22f47c744a49661bf9baa521c0d2ef992335e7f7ee"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:49:32.448823Z","signature_b64":"e95Jvf7Wf00JM5u9C9mAnWrWrNWy/apF3nd5y2EHS/4wf8dBMzFQ8j3whF+dqMG75/tCfcsJu0f0yi1cA52zCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d050b9f4b874cae1cddd59a230be093ac7fc2915b29d85016fbe8481abd7e9fa","last_reissued_at":"2026-05-18T03:49:32.447947Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:49:32.447947Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Measurement of the isospin asymmetry in $B \\to K^{(*)}\\mu^+\\mu^-$ decays","license":"http://creativecommons.org/licenses/by/3.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. A. Alves Jr, A. Adametz, A. Affolder, A. Artamonov, A. Bates, A. Bay, A. Bien, A. Bizzeti, A. Bobrov, A. Bondar, A. Borgia, A. B\\\"uchler-Germann, A. Bursche, A. Camboni, A. Carbone, A. Cardini, A. C. dos Reis, A. Comerma-Montells, A. Contu, A. Cook, A. D. Nguyen, A. Dosil Su\\'arez, A. Dovbnya, A. D. Webber, A. Dziurda, A. Dzyuba, A. Falabella, A. Gallas Torreira, A. Golutvin, A. Gomes, A. Grecu, A. Jaeger, A. Keune, A. Kozlinskiy, A. Lai, A. Leflat, A. Mac Raighne, A. Martens, A. Mart\\'in S\\'anchez, A. Massafferri, A. Mazurov, A. Nomerotski, A. Novoselov, A. Oblakowska-Mucha, A. Palano, A. Papanestis, A. Pazos Alvarez, A. Pellegrino, A. P\\'erez-Calero Yzquierdo, A. Petrolini, A. Phan, A. Poluektov, A. Powell, A. Puig Navarro, A. Richards, A. Sarti, A. Satta, A. Schopper, A. Sciubba, A. Semennikov, A. Shires, A. Solomin, A. Sparkes, A. Tsaregorodtsev, A. Ukleja, A. Vollhardt, A. Vorobyev, A. Zhelezov, A. Zvyagin, B. Adeva, B. Couturier, B. Gui, B. Jean-Marie, B. Jost, B. Khanji, B. K. Pal, B. Liu, B. Maynard, B. Muryn, B. Muster, B. Pietrzyk, B. Pie Valls, B. Popovici, B. Rakotomiaramanana, B. Saitta, B. Sanmartin Sedes, B. Schmidt, B. Sciascia, B. Souza De Paula, B. Spaan, B. Storaci, B. Viaud, C. Abellan Beteta, C. Adrover, C. Barschel, C. Bauer, C. Blanks, C. Bozzi, C. Coca, C. D'Ambrosio, C. Deplano, C. F\\\"arber, C. Farinelli, C. Fitzpatrick, C. Frei, C. Gaspar, C. G\\\"obel, C. Hadjivasiliou, C. Haen, Ch. Cauet, Ch. Elsasser, C. J. Parkinson, C. Langenbruch, C. Lazzeroni, C. Linn, C. Matteuzzi, C. Nguyen-Mau, C. Parkes, C. Patrignani, C. Pavel-Nicorescu, C. Potterat, C. R. Jones, C. Salzmann, C. Santamarina Rios, C. Satriano, C. Thomas, C. Vo{\\ss}, D. A. Milanes, D. A. Roa Romero, D. Brett, D. Craik, D. Decamp, D. Derkach, D. Dossett, D. Elsby, D. Esperante Pereira, D. Galli, D. Gascon, D. Golubkov, D. Hutchcroft, D. Hynds, D. Johnson, D. Lacarrere, D. Lambert, D. L. Perego, D. Martinez Santos, D. Moran, D. Pinci, D. Popov, D. R. Ward, D. Savrina, D. Souza, D. van Eijk, D. Vieira, D. Volyanskyy, D. Voong, D. Websdale, D. Wiedner, E. Aslanides, E. Ben-Haim, E. Cogneras, E. Graug\\'es, E. Greening, E. Gushchin, E. Hicks, E. Jans, E. Lanciotti, E. Lopez Asamar, E. Maurice, E. Perez Trigo, E. Picatoste Olloqui, E. Polycarpo, E. Rodrigues, E. Santovetti, E. Smith, E. Teodorescu, E. Thomas, E. Tournefier, E. van Herwijnen, F. Alessio, F. Archilli, F. Blanc, F. Dettori, F. Domingo Bonal, F. Dordei, F. Dupertuis, F. Eisele, F. Fontanelli, F. F. Wilson, F. Jansen, F. Jing, F. J. P. Soler, F. Kruse, F. Machefert, F. Maciuc, F. Muheim, F. Polci, F. Rodrigues, F. Soomro, F. Stagni, F. Teubert, F. Xing, F. Zhang, G. A. Cowan, G. Alkhazov, G. Auriemma, G. Bencivenni, G. Carboni, G. Casse, G. Ciezarek, G. Corti, G. D. Patel, G. Fardell, G. Graziani, G. Haefeli, G. J. Rogers, G. Krocker, G. Lafferty, G. Lanfranchi, G. Liu, G. Manca, G. Mancinelli, G. Martellotti, G. McGregor, G. N. Patrick, G. Passaleva, G. Penso, G. Pessina, G. Polok, G. Raven, G. Sabatino, G. Valenti, G. Wilkinson, H. Brown, H. Degaudenzi, H. Dijkstra, H. Gordon, H. Lu, H. Ruiz, H. Schindler, H. V. Cliff, H. Voss, I. Bediaga, I. Belyaev, I. Burducea, I. De Bonis, I. El Rifai, I. Komarov, I. Mous, I. Nasteva, I. Raniuk, I. R. Kenyon, I. Sepp, I. Shapoval, I. Videau, I. V. Machikhiliyan, J. A. Hernando Morata, J. Albrecht, J. Anderson, J. Beddow, J. Benton, J. Blouw, J. Bressieux, J. Buytaert, J-C. Garnier, J. Closier, J. Cogan, J. Dickens, J. Garofoli, J. Garra Tico, J. Harrison, J. He, J. H. Lopes, J. H. Rademacker, J. Imong, J. J. Back, J. J. Saborido Silva, J. J. Velthuis, J. Keaveney, J. Lefran\\c{c}ois, J. Luisier, J. Magnin, J. Marks, J. McCarthy, J. M. de Miranda, J. Merkel, J. Molina Rodriguez, J. M. Otalora Goicochea, J. Mylroie-Smith, J. Palacios, J. Panman, J.-P. Lees, J. Prisciandaro, J. Rouvinet, J. Serrano, J. van den Brand, J. van Leerdam, J. van Tilburg, J. Visniakov, J. von Loeben, J. Wang, J. Wicht, J. Wishahi, K. 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Xie, Y. Zhang, Z. Ajaltouni, Z. Mathe, Z. Xing, Z. Yang","submitted_at":"2012-05-15T15:44:52Z","abstract_excerpt":"The isospin asymmetries of $B \\to K^{(*)}\\mu^+\\mu^-$ decays and the partial branching fractions of $B^0 \\to K^0\\mu^+\\mu^-$ and $B^+ \\to K^{*+}\\mu^+\\mu^-$ are measured as a function of the di-muon mass squared $q^2$ using an integrated luminosity of 1.0 fb$^{-1}$ collected with the LHCb detector. The $B \\to K\\mu^+\\mu^-$ isospin asymmetry integrated over $q^2$ is negative, deviating from zero with over 4 $\\sigma$ significance. The $B \\to K^{*}\\mu^+\\mu^-$ decay measurements are consistent with the Standard Model prediction of negligible isospin asymmetry. 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