Authors
R Aaij, A S W Abdelmotteleb, C Abellan Beteta, F Abudinén, T Ackernley, A A Adefisoye, B Adeva, M Adinolfi, P Adlarson, C Agapopoulou, C A Aidala, Z Ajaltouni, S Akar, K Akiba, M Akthar, P Albicocco, J Albrecht, R Aleksiejunas, F Alessio, P Alvarez Cartelle, R Amalric, S Amato, J L Amey, Y Amhis, L An, L Anderlini, M Andersson, P Andreola, M Andreotti, S Andres Estrada, A Anelli, D Ao, C Arata, F Archilli, Z Areg, M Argenton, S Arguedas Cuendis, L Arnone, A Artamonov, M Artuso, E Aslanides, R Ataíde Da Silva, M Atzeni, B Audurier, J A Authier, D Bacher, I Bachiller Perea, S Bachmann, M Bachmayer, J J Back, P Baladron Rodriguez, V Balagura, A Balboni, W Baldini, Z Baldwin, L Balzani, H Bao, J Baptista de Souza Leite, C Barbero Pretel, M Barbetti, I R Barbosa, R J Barlow, M Barnyakov, S Barsuk, W Barter, J Bartz, S Bashir, B Batsukh, P B Battista, A Bavarchee, A Bay, A Beck, M Becker, F Bedeschi, I B Bediaga, N A Behling, S Belin, A Bellavista, K Belous, I Belov, I Belyaev, G Benane, G Bencivenni, E Ben-Haim, A Berezhnoy, R Bernet, S Bernet Andres, A Bertolin, F Betti, J Bex, O Bezshyyko, S Bhattacharya, M S Bieker, N V Biesuz, A Biolchini, M Birch, F C R Bishop, A Bitadze, A Bizzeti, T Blake, F Blanc, J E Blank, S Blusk, V Bocharnikov, J A Boelhauve, O Boente Garcia, T Boettcher, A Bohare, A Boldyrev, C Bolognani, R Bolzonella, R B Bonacci, N Bondar, A Bordelius, F Borgato, S Borghi, M Borsato, J T Borsuk, E Bottalico, S A Bouchiba, M Bovill, T J V Bowcock, A Boyer, C Bozzi, J D Brandenburg, A Brea Rodriguez, N Breer, J Brodzicka, J Brown, D Brundu, E Buchanan, M Burgos Marcos, A T Burke, C Burr, C Buti, J S Butter, J Buytaert, W Byczynski, S Cadeddu, H Cai, Y Cai, A Caillet, R Calabrese, S Calderon Ramirez, L Calefice, M Calvi, M Calvo Gomez, P Camargo Magalhaes, J I Cambon Bouzas, P Campana, A F Campoverde Quezada, Y Cao, S Capelli, M Caporale, L Capriotti, R Caravaca-Mora, A Carbone, L Carcedo Salgado, R Cardinale, A Cardini, P Carniti, L Carus, A Casais Vidal, R Caspary, G Casse, M Cattaneo, G Cavallero, V Cavallini, S Celani, I Celestino, S Cesare, A J Chadwick, I Chahrour, H Chang, M Charles, Ph Charpentier, E Chatzianagnostou, R Cheaib, M Chefdeville, C Chen, J Chen, S Chen, Z Chen, A Chen Hu, M Cherif, A Chernov, S Chernyshenko, X Chiotopoulos, V Chobanova, M Chrzaszcz, A Chubykin, V Chulikov, P Ciambrone, X Cid Vidal, G Ciezarek, P Cifra, P E L Clarke, M Clemencic, H V Cliff, J Closier, C Cocha Toapaxi, V Coco, J Cogan, E Cogneras, L Cojocariu, S Collaviti, P Collins, T Colombo, M Colonna, A Comerma-Montells, L Congedo, J Connaughton, A Contu, N Cooke, G Cordova, C Coronel, I Corredoira, A Correia, G Corti, J Cottee Meldrum, B Couturier, D C Craik, M Cruz Torres, M Cubero Campos, E Curras Rivera, R Currie, C L Da Silva, S Dadabaev, X Dai, E Dall'Occo, J Dalseno, C D'Ambrosio, J Daniel, G Darze, A Davidson, J E Davies, O De Aguiar Francisco, C De Angelis, F De Benedetti, J de Boer, K De Bruyn, S De Capua, M De Cian, U De Freitas Carneiro Da Graca, E De Lucia, J M De Miranda, L De Paula, M De Serio, P De Simone, F De Vellis, J A de Vries, F Debernardis, D Decamp, S Dekkers, L Del Buono, B Delaney, J Deng, V Denysenko, O Deschamps, F Dettori, B Dey, P Di Nezza, I Diachkov, S Didenko, S Ding, Y Ding, L Dittmann, V Dobishuk, A D Docheva, A Doheny, C Dong, A M Donohoe, F Dordei, A C Dos Reis, A D Dowling, L Dreyfus, W Duan, P Duda, L Dufour, V Duk, P Durante, M M Duras, J M Durham, O D Durmus, A Dziurda, A Dzyuba, S Easo, E Eckstein, U Egede, A Egorychev, V Egorychev, S Eisenhardt, E Ejopu, L Eklund, M Elashri, D Elizondo Blanco, J Ellbracht, S Ely, A Ene, J Eschle, T Evans, F Fabiano, S Faghih, L N Falcao, B Fang, R Fantechi, L Fantini, M Faria, K Farmer, F Fassin, D Fazzini, L Felkowski, C Feng, M Feng, A Fernandez Casani, M Fernandez Gomez, A D Fernez, F Ferrari, F Ferreira Rodrigues, M Ferrillo, M Ferro-Luzzi, S Filippov, R A Fini, M Fiorini, M Firlej, K L Fischer, D S Fitzgerald, C Fitzpatrick, T Fiutowski, F Fleuret, A Fomin, M Fontana, L A Foreman, R Forty, D Foulds-Holt, V Franco Lima, M Franco Sevilla, M Frank, E Franzoso, G Frau, C Frei, D A Friday, J Fu, Q Führing, T Fulghesu, G Galati, M D Galati, A Gallas Torreira, D Galli, S Gambetta, M Gandelman, P Gandini, B Ganie, H Gao, R Gao, T Q Gao, Y Gao, Y Gao, Y Gao, L M Garcia Martin, P Garcia Moreno, J García Pardiñas, P Gardner, L Garrido, C Gaspar, A Gavrikov, L L Gerken, E Gersabeck, M Gersabeck, T Gershon, S Ghizzo, Z Ghorbanimoghaddam, F I Giasemis, V Gibson, H K Giemza, A L Gilman, M Giovannetti, A Gioventù, L Girardey, M A Giza, F C Glaser, V V Gligorov, C Göbel, L Golinka-Bezshyyko, E Golobardes, D Golubkov, A Golutvin, S Gomez Fernandez, W Gomulka, I Gonçales Vaz, F Goncalves Abrantes, M Goncerz, G Gong, J A Gooding, I V Gorelov, C Gotti, E Govorkova, J P Grabowski, L A Granado Cardoso, E Graugés, E Graverini, L Grazette, G Graziani, A T Grecu, N A Grieser, L Grillo, S Gromov, C Gu, M Guarise, L Guerry, A-K Guseinov, E Gushchin, Y Guz, T Gys, K Habermann, T Hadavizadeh, C Hadjivasiliou, G Haefeli, C Haen, S Haken, G Hallett, P M Hamilton, J Hammerich, Q Han, X Han, S Hansmann-Menzemer, L Hao, N Harnew, T J Harris, M Hartmann, S Hashmi, J He, N Heatley, A Hedes, F Hemmer, C Henderson, R Henderson, R D L Henderson, A M Hennequin, K Hennessy, L Henry, J Herd, P Herrero Gascon, J Heuel, A Heyn, A Hicheur, G Hijano Mendizabal, J Horswill, R Hou, Y Hou, D C Houston, N Howarth, W Hu, X Hu, W Hulsbergen, R J Hunter, M Hushchyn, D Hutchcroft, M Idzik, D Ilin, P Ilten, A Iniukhin, A Iohner, A Ishteev, K Ivshin, H Jage, S J Jaimes Elles, S Jakobsen, T Jakoubek, E Jans, B K Jashal, A Jawahery, C Jayaweera, A Jelavic, V Jevtic, Z Jia, E Jiang, X Jiang, Y Jiang, Y J Jiang, E Jimenez Moya, N Jindal, M John, A John Rubesh Rajan, D Johnson, C R Jones, S Joshi, B Jost, J Juan Castella, N Jurik, I Juszczak, K Kalecinska, D Kaminaris, S Kandybei, M Kane, Y Kang, C Kar, M Karacson, A Kauniskangas, J W Kautz, M K Kazanecki, F Keizer, M Kenzie, T Ketel, B Khanji, A Kharisova, S Kholodenko, G Khreich, F Kiraz, T Kirn, V S Kirsebom, S Klaver, N Kleijne, A Kleimenova, D K Klekots, K Klimaszewski, M R Kmiec, T Knospe, R Kolb, S Koliiev, L Kolk, A Konoplyannikov, P Kopciewicz, P Koppenburg, A Korchin, M Korolev, I Kostiuk, O Kot, S Kotriakhova, E Kowalczyk, A Kozachuk, P Kravchenko, L Kravchuk, O Kravcov, M Kreps, P Krokovny, W Krupa, W Krzemien, O Kshyvanskyi, S Kubis, M Kucharczyk, V Kudryavtsev, E Kulikova, A Kupsc, V Kushnir, B Kutsenko, J Kvapil, I Kyryllin, D Lacarrere, P Laguarta Gonzalez, A Lai, A Lampis, D Lancierini, C Landesa Gomez, J J Lane, G Lanfranchi, C Langenbruch, J Langer, T Latham, F Lazzari, C Lazzeroni, R Le Gac, H Lee, R Lefèvre, A Leflat, S Legotin, M Lehuraux, E Lemos Cid, O Leroy, T Lesiak, E D Lesser, B Leverington, A Li, C Li, C Li, H Li, J Li, K Li, L Li, M Li, P Li, P-R Li, Q Li, T Li, T Li, Y Li, Y Li, Y Li, Z Lian, Q Liang, X Liang, Z Liang, S Libralon, A Lightbody, C Lin, T Lin, R Lindner, H Linton, R Litvinov, D Liu, F L Liu, G Liu, K Liu, S Liu, W Liu, Y Liu, Y Liu, Y L Liu, G Loachamin Ordonez, I Lobo, A Lobo Salvia, A Loi, T Long, F C L Lopes, J H Lopes, A Lopez Huertas, C Lopez Iribarnegaray, S López Soliño, Q Lu, C Lucarelli, D Lucchesi, M Lucio Martinez, Y Luo, A Lupato, E Luppi, K Lynch, S Lyu, X-R Lyu, G M Ma, H Ma, S Maccolini, F Machefert, F Maciuc, B Mack, I Mackay, L M Mackey, L R Madhan Mohan, M J Madurai, D Magdalinski, D Maisuzenko, J J Malczewski, S Malde, L Malentacca, A Malinin, T Maltsev, G Manca, G Mancinelli, C Mancuso, R Manera Escalero, F M Manganella, D Manuzzi, D Marangotto, J F Marchand, R Marchevski, U Marconi, E Mariani, S Mariani, C Marin Benito, J Marks, A M Marshall, L Martel, G Martelli, G Martellotti, L Martinazzoli, M Martinelli, D Martinez Gomez, D Martinez Santos, F Martinez Vidal, A Martorell I Granollers, A Massafferri, R Matev, A Mathad, V Matiunin, C Matteuzzi, K R Mattioli, A Mauri, E Maurice, J Mauricio, P Mayencourt, J Mazorra 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Z Zheng, Y Zheng, T Zhou, X Zhou, Y Zhou, V Zhovkovska, L Z Zhu, X Zhu, X Zhu, Y Zhu, V Zhukov, J Zhuo, D Zuliani, G Zunica, LHCb Collaboration
Published in
Physical review letters. Volume 137. Issue 5. Pages 051801. Jul 31, 2026.
Abstract
A search for the rare decay B^{+}→Λ[over ¯]pμ^{+}μ^{-} is performed using proton-proton collision data recorded by the LHCb experiment at a center-of-mass energy of sqrt[s]=13 TeV, corresponding to an integrated luminosity of 5.4 fb^{-1}. An excess of events is found with respect to the background-only expectation, with a signal significance of 3.5 standard deviations, in the low invariant-mass region of m(Λ[over ¯]p)<2.8 GeV/c^{2}. The branching fraction is measured to be B_{low}(B^{+}→Λ[over ¯]pμ^{+}μ^{-})=(1.70_{-0.56}^{+0.65}(stat)±0.17(syst)±0.14(ext))×10^{-8}, where the last uncertainty is due to external inputs on B(B^{+}→J/ψΛ[over ¯]p)×B(J/ψ→μ^{+}μ^{-}). With no significant signal observed in the high m(Λ[over ¯]p) region above 2.8 GeV/c^{2}, an upper limit is set to be B_{high}(B^{+}→Λ[over ¯]pμ^{+}μ^{-})<2.8(3.7)×10^{-9} at the 90% (95%) confidence level.
PMID:
42606492
Bibliographic data and abstract were imported from PubMed on 17 Aug 2026.
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