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Yang","submitted_at":"2017-12-22T18:30:04Z","abstract_excerpt":"A search for the rare decay $\\Sigma^+ \\to p \\mu^+ \\mu^-$ is performed using $pp$ collision data recorded by the LHCb experiment at centre-of-mass energies $\\sqrt{s} = 7$ and $8$ TeV, corresponding to an integrated luminosity of $3 fb^{-1}$. An excess of events is observed with respect to the background expectation, with a signal significance of 4.1 standard deviations. No significant structure is observed in the dimuon invariant mass distribution, in contrast with a previous result from the HyperCP experiment. The measured $\\Sigma^+ \\to p \\mu^+ \\mu^-$ branching fraction is $(2.2\\,^{+\\,1.8}_{-\\"},"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":"1712.08606","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ex","submitted_at":"2017-12-22T18:30:04Z","cross_cats_sorted":[],"title_canon_sha256":"b16fbff1156902413f9a5ab56175b77a643927516be505320b0605d6e0858d8c","abstract_canon_sha256":"a2278674c4fcced1cceea53c8ace37d69fce206525f0c7d295674ecdc9fcacce"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:14:10.842863Z","signature_b64":"ShULDncP36mgg9ObZcY7+ahZyukfI5L4qOExfDJO37wj55NCndwNAi88lRDDgcx57KI2W73f1RX1oTtiBhYZCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"42708a41b6e98abaafd83fd937ae36f3907876f530e38a20d94822477076ecdb","last_reissued_at":"2026-05-18T00:14:10.842334Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:14:10.842334Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Evidence for the rare decay $\\Sigma^+ \\to p \\mu^+ \\mu^-$","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. Badalov, A. Baranov, A. Bay, A. Beiter, A. Berezhnoy, A. Bertolin, A. Birnkraut, A. Bizzeti, A.B. Morris, A. Bondar, A.B. Rodrigues, A. Bursche, A. Camboni, A. Carbone, A. Cardini, A.C. dos Reis, A. Chubykin, A. Comerma-Montells, A. Contu, A. Crocombe, A. Davis, A. Dendek, A. Di Canto, A. Dosil Su\\'arez, A. Dovbnya, A. Dziurda, A. Dzyuba, A. Falabella, A. Fernandez Prieto, A. Gallas Torreira, A. Golutvin, A. Gomes, A. Grecu, A. Heister, A. Hicheur, A. Jawahery, A.K. Kuonen, A. Kosmyntseva, A. Lai, A. Leflat, A. Loi, A. Lupato, A. Lusiani, A. Malinin, A. Massafferri, A. Mathad, A. Mauri, A. Mazurov, A. McNab, A. Merli, A. Mogini, A. Nandi, A. Nogay, A. Oblakowska-Mucha, A. Ossowska, A. Oyanguren, A. Palano, A. Papanestis, A. Pastore, A. Pearce, A. Pellegrino, A. Petrolini, A. Petrov, A. Pistone, A. Piucci, A. Poluektov, A. Popov, A. Puig Navarro, A. Robert, A. Rogozhnikov, A. Rollings, A. Romero Vidal, A. Sarti, A. Satta, A. Schopper, A. Sciubba, A. Semennikov, A. Sergi, A. Tayduganov, A. Trisovic, A. Tsaregorodtsev, A. Tully, A. Ukleja, A. Usachov, A. Ustyuzhanin, A. Vagner, A. Valassi, A. Venkateswaran, A. Vollhardt, A. Vorobyev, A. Weiden, A. Zhelezov, B. Adeva, B. Couturier, B. Dey, B.G. Siddi, B. Hamilton, B. Jost, B. Khanji, 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. Storaci, B. Voneki, C. Baesso, C. Barschel, C. Betancourt, C. Bozzi, C. Burr, C. D'Ambrosio, C. F\\\"arber, C. Fitzpatrick, C. Frei, C. Gaspar, C. G\\\"obel, C. Gotti, C. Hadjivasiliou, C. Haen, C. Hasse, 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. Potterat, C. Prouve, C. Remon Alepuz, C.R. Jones, C. Sanchez Mayordomo, C. Santamarina Rios, C. 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Baryshnikov, F. Bedeschi, F. Betti, F. Blanc, F. Bossu, F. Da Cunha Marinho, F. Dettori, F. Dordei, F. Ferrari, F. Ferreira Rodrigues, F. Fleuret, F. Fontanelli, F.F. Wilson, F. Jiang, F.J.P. Soler, F. Keizer, F. Kress, F. Lemaitre, F. Lionetto, F. Machefert, F. Maciuc, F. Martinez Vidal, F. Meier, F. Muheim, F. Pisani, F. Polci, F. Ratnikov, F. Redi, F. Stagni, F. Teubert, G.A. Cowan, G. Alkhazov, G. Andreassi, G. Auriemma, G. Bencivenni, G. Carboni, G. Casse, G. Cavallero, G. Chatzikonstantinidis, G. Ciezarek, G. Coombs, G. Corti, G. Dujany, G. Fernandez, G. Gazzoni, G. Graziani, G. Haefeli, G.J. Pomery, G. Lafferty, G. Lanfranchi, G. Manca, G. Mancinelli, G. Martellotti, G. Panshin, G. Passaleva, G. Penso, G. Pietrzyk, G. Punzi, G. Raven, G. Sarpis, G. Simi, G. Tellarini, G. Valenti, G. Veneziano, G. Wilkinson, G. Wormser, H. Cai, H. Dijkstra, H.F. Schreiner, H. Luo, H.M. Evans, H.M. Wark, H.-P. Dembinski, H. Pullen, H. Schindler, H. Stevens, H.V. Cliff, H. Viemann, H. Yin, Ia. Bezshyiko, I.A. Monroy, I. Babuschkin, I. Bediaga, I. Belyaev, I. Bordyuzhin, I. Longstaff, I. Nasteva, I. Polyakov, I. Raniuk, I.T. Smith, I.V. Gorelov, J.A. de Vries, J. Albrecht, J. Arnau Romeu, J.A. Rodriguez Lopez, J. Beddow, J. Brodzicka, J. Buytaert, J.B. Zonneveld, J. Closier, J. Cogan, J. Dalseno, J.E. Andrews, J.F. Marchand, J. Fu, J. Garc\\'ia Pardi\\~nas, J. Garra Tico, J. He, J.H. Lopes, J.H. Rademacker, J. Jalocha, J.J. Back, J.J. Saborido Silva, J.J. Velthuis, J. Lefran\\c{c}ois, J. Maratas, J. Marks, J.M. De Miranda, J.M. Durham, J.M. Kariuki, J. Molina Rodriguez, J. Moron, J.M. Otalora Goicochea, J. M\\\"uller, J.P. Grabowski, J. Prisciandaro, J. Qin, J. Ruiz Vidal, J. Serrano, J. Smith, J. Sun, J. van Tilburg, J.V. Mead, J.V. Viana Barbosa, J. Walsh, J. Wang, J. Wicht, J. Wimberley, J. Wishahi, J. Yu, K.A. Zarebski, K. Belous, K. Carvalho Akiba, K. De Bruyn, K. Dreimanis, K.E. Kim, K. Gizdov, K. Heinicke, K. Hennessy, K. Klimaszewski, K. Maguire, K. M\\\"uller, K. Petridis, K. Rinnert, K. Swientek, K. Wyllie, L.A. Granado Cardoso, L. An, L. Anderlini, L. Beaucourt, L. Capriotti, L. Carson, L. Cassina, L. Cojocariu, L. Del Buono, L. De Paula, L. Douglas, L. Dufour, L. Eklund, L. Federici, L. Ferreira Lopes, L. Garrido, L. Gavardi, L. Giubega, L. Grillo, L. Gruber, LHCb collaboration: R. Aaij, L. Henry, L.J. Bel, L. Kravchuk, L.L. Pappalardo, L.M. Garcia Martin, L. Minzoni, L. Pescatore, L. Sestini, L. Shekhtman, L. Silva de Oliveira, L. Soares Lavra, L. Sun, L. Tomassetti, L. Zhang, M. Adinolfi, M. Alexander, M. Andreotti, M. Artuso, M. Atzeni, M. Baalouch, M. Bj{\\o}rn, M. Borisyak, M. Borsato, M. Boubdir, M. Calvi, M. Calvo Gomez, M. Cattaneo, M. Charles, M. Chefdeville, M. Chrzaszcz, M. Clemencic, M. Corvo, M. Cruz Torres, M. De Cian, M. Demmer, M. De Serio, M. Dorigo, M.D. Sokoloff, M. Dziewiecki, M.E. Stramaglia, M. Ferro-Luzzi, M. Fiorini, M. Firlej, M. Fontana, M. Frank, M. Gandelman, M.G. Chapman, M. Gersabeck, M. Hatch, M. Hecker, M. He{\\ss}, M.H. Schune, M. Hushchyn, M. Idzik, M.J. Morello, M. John, M.J. Tilley, M. Karacson, M. Kecke, M. Kelsey, M. Kenzie, M. Kolpin, M. Kozeiha, M. Kreps, M. Kucharczyk, M. Lucio Martinez, M. Marinangeli, M. Martin, M. Martinelli, M. McCann, M. Merk, M. Morandin, M. Mulder, M. Needham, M. Neuner, M.-N. Minard, M.O. Bettler, M. Palutan, M. Pappagallo, M. Patel, M. Pepe Altarelli, M. Petruzzo, M. Pikies, M. Plo Casasus, M. Poli Lener, M. Rama, M. Ramos Pernas, M. Ravonel Salzgeber, M. Reboud, M. Rihl, M. Rotondo, M. Santimaria, M. Schellenberg, M. Schiller, M. Schmelling, M. Schubiger, M. Shapkin, M. Sirendi, M. Smith, M.S. Rangel, M.S. Rudolph, M. Stahl, M. Stepanova, M. Straticiuc, M. Szymanski, M. Tobin, M. Traill, M. Tresch, M.T. Tran, M. van Beuzekom, M. van Veghel, M. Veltri, M. Vernet, M. Vesterinen, M. Vieites Diaz, M. Vitti, M. Whitehead, M. Wilkinson, M. Williams, M. Winn, M. Witek, M.W. Majewski, M. Xu, M. Zavertyaev, N. Beliy, N. Belloli, N. Bondar, N. Farley, N. Harnew, N. Jurik, N. Kazeev, N.K. Watson, N. Meinert, N. Neri, N. Neufeld, N. Nikitin, N. Sagidova, N. Serra, N. Skidmore, N. Tuning, O. De Aguiar Francisco, O. Deschamps, O.G. Girard, O. Gr\\\"unberg, O. Leroy, O. Lupton, O. Maev, O. Morgunova, O. Schneider, O. Steinkamp, O. Stenyakin, O. Yushchenko, P. Alvarez Cartelle, P. Billoir, P. Campana, P. Carniti, P. Ciambrone, P. Collins, P. d'Argent, P. De Simone, P. Di Nezza, P. Durante, P.E.L. Clarke, P. Fernandez Declara, P. Gandini, P. Griffith, Ph. Charpentier, P. Henrard, Ph. Ghez, P.H. Hopchev, P. Ibis, P. Ilten, P. Koppenburg, P. Krokovny, P. Mackowiak, P. Marino, P. Naik, P. Owen, P. Perret, P.-R. Li, P. Robbe, P.R. Pais, P. Ruiz Valls, P. Seyfert, P. Spradlin, P. Stefko, P. Tsopelas, P. Vazquez Regueiro, Q. Xu, R.A. Fini, R.B. Appleby, R. Bernet, R. Calabrese, R. Calladine, R. Cardinale, R. Cenci, R. Currie, R. Dzhelyadin, R. Ekelhof, R. Forty, R. Graciani Diaz, R. Greim, R. Jacobsson, R.J. Barlow, R. Kopecna, R. Lef\\`evre, R. 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Verlage, T. Blake, T. Boettcher, T. Colombo, T.D. Nguyen, T. Evans, T. Fiutowski, T. Gershon, T. Gys, T. Hadavizadeh, T.H. Hancock, T. Humair, T.J.V. Bowcock, T. Ketel, T. Kirn, T. Klimkovich, T. Kvaratskheliya, T. Latham, T. Lesiak, T. Li, T. Likhomanenko, T. Maltsev, T. Momb\\\"acher, T. Nakada, T. Nikodem, 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. Chobanova, V. Coco, V. Cogoni, V. Egorychev, V. Franco Lima, V. Gibson, V. Kudryavtsev, V. Lisovskyi, V. Macko, V. M\\\"uller, V. Obraztsov, V. Placinta, V. Pugatch, V. Renaudin, V. Romanovskiy, V. Salustino Guimaraes, V. Shevchenko, V. Syropoulos, V. Tisserand, V. Vagnoni, V.V. Gligorov, V. Volkov, V. Vorobyev, V. Zhukov, W. Baldini, W. Barter, W. Byczynski, W. Funk, W. Hu, W. Huang, W. Hulsbergen, W. Krzemien, W. Kucewicz, W. Parker, W. Qian, W. Wislicki, X. Cid Vidal, X. Han, X. Liang, X. Liu, X. Lyu, X. Vilasis-Cardona, X. Yuan, X. Zhu, Y. Amhis, Y. Gao, Y. Li, Y. Shcheglov, Yu. Guz, Y. Wang, Y. Xie, Y. Yao, Y. Zhang, Y. Zheng, Z. Ajaltouni, Z.C. Huard, Z. Li, Z. Mathe, Z. Xu, Z. Yang","submitted_at":"2017-12-22T18:30:04Z","abstract_excerpt":"A search for the rare decay $\\Sigma^+ \\to p \\mu^+ \\mu^-$ is performed using $pp$ collision data recorded by the LHCb experiment at centre-of-mass energies $\\sqrt{s} = 7$ and $8$ TeV, corresponding to an integrated luminosity of $3 fb^{-1}$. An excess of events is observed with respect to the background expectation, with a signal significance of 4.1 standard deviations. No significant structure is observed in the dimuon invariant mass distribution, in contrast with a previous result from the HyperCP experiment. 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