Search for the Lepton-Flavor-Violating Decays B_{s}^{0}→τ^{±}μ^{∓} and B^{0}→τ^{±}μ^{∓}.
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Bowcock, C Bozzi,S Braun,A Brea Rodriguez, M Brodski,J Brodzicka,A Brossa Gonzalo, D Brundu,E Buchanan, A Buonaura,C Burr, A Bursche, J S Butter,J Buytaert,W Byczynski,S Cadeddu,H Cai,R Calabrese, S Cali, R Calladine, M Calvi,M Calvo Gomez, A Camboni, P Campana,D H Campora Perez,L Capriotti,A Carbone, G Carboni,R Cardinale, A Cardini,P Carniti,K Carvalho Akiba,A Casais Vidal,G Casse, M Cattaneo, G Cavallero, R Cenci,M G Chapman,M Charles,Ph Charpentier,G Chatzikonstantinidis, M Chefdeville,V Chekalina,C Chen,S Chen,S-G Chitic,V Chobanova, M Chrzaszcz, A Chubykin,P Ciambrone,X Cid Vidal, G Ciezarek,F Cindolo, P E L Clarke, M Clemencic, H V Cliff, J Closier, J L Cobbledick,V Coco, J A B Coelho, J Cogan, E Cogneras, L Cojocariu,P Collins,T Colombo, A Comerma-Montells,A Contu,G Coombs, S Coquereau,G Corti,C M Costa Sobral, B Couturier, G A Cowan, D C Craik, A Crocombe,M Cruz Torres,R Currie,C L Da Silva,E Dall'Occo,J Dalseno, C D'Ambrosio, A Danilina, P d'Argent,A Davis,O De Aguiar Francisco,K De Bruyn,S De Capua,M De Cian,J M De Miranda,L De Paula,M De Serio,P De Simone,J A de Vries,C T Dean,W Dean, D Decamp,L Del Buono,B Delaney,H-P Dembinski,M Demmer, A Dendek,D Derkach,O Deschamps, F Desse,F Dettori,B Dey,A Di Canto,P Di Nezza,S Didenko, H Dijkstra,F Dordei,M Dorigo,A C Dos Reis,A Dosil Suárez, L Douglas, A Dovbnya,K Dreimanis,L Dufour, G Dujany,P Durante,J M Durham,D Dutta,R Dzhelyadin, M Dziewiecki,A Dziurda, A Dzyuba,S Easo,U Egede,V Egorychev,S Eidelman,S Eisenhardt, U Eitschberger, R Ekelhof,S Ek-In,L Eklund,S Ely, A Ene,S Escher,S Esen,T Evans, A Falabella, C Färber, N Farley, S Farry,D Fazzini,M Féo,P Fernandez Declara,A Fernandez Prieto,F Ferrari,L Ferreira Lopes,F Ferreira Rodrigues,S Ferreres Sole, M Ferro-Luzzi,S Filippov, R A Fini,M Fiorini,M Firlej, C Fitzpatrick,T Fiutowski,F Fleuret,M Fontana,F Fontanelli, R Forty,V Franco Lima,M Franco Sevilla,M Frank,C Frei,J Fu, W Funk,E Gabriel,A Gallas Torreira,D Galli,S Gallorini,S Gambetta,Y Gan, M Gandelman, P Gandini,Y Gao,L M Garcia Martin,J García Pardiñas,B Garcia Plana,J Garra Tico, L Garrido,D Gascon,C Gaspar,G Gazzoni, D Gerick,E Gersabeck,M Gersabeck, T Gershon,D Gerstel,Ph Ghez, V Gibson, O G Girard,P Gironella Gironell, L Giubega,K Gizdov, V V Gligorov,C Göbel, D Golubkov, A Golutvin,A Gomes, I V Gorelov, C Gotti,E Govorkova,J P Grabowski,R Graciani Diaz,L A Granado Cardoso,E Graugés,E Graverini, G Graziani, A Grecu,R Greim,P Griffith, L Grillo,L Gruber,B R Gruberg Cazon,C Gu, E Gushchin,A Guth,Yu Guz,T Gys,T Hadavizadeh, C Hadjivasiliou, G Haefeli, C Haen, S C Haines,B Hamilton,Q Han,X Han,T H Hancock, S Hansmann-Menzemer, N Harnew,T Harrison,C Hasse, M Hatch,J He,M Hecker, K Heijhoff,K Heinicke, A Heister,K Hennessy,L Henry,M Heß,J Heuel,A Hicheur,R Hidalgo Charman, D Hill,M Hilton, P H Hopchev,J Hu,W Hu,W Huang,Z C Huard,W Hulsbergen, T Humair, M Hushchyn, D Hutchcroft, D Hynds,P Ibis,M Idzik,P Ilten, A Inglessi, A Inyakin,K Ivshin, R Jacobsson,S Jakobsen, J 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Reiss,C Remon Alepuz,Z Ren, V Renaudin,S Ricciardi,S Richards,K Rinnert,P Robbe,A Robert,A B Rodrigues,E Rodrigues,J A Rodriguez Lopez, M Roehrken, S Roiser, A Rollings,V Romanovskiy,A Romero Vidal,J D Roth,M Rotondo, M S Rudolph,T Ruf,J Ruiz Vidal,J J Saborido Silva, N Sagidova, B Saitta,V Salustino Guimaraes,C Sanchez Gras,C Sanchez Mayordomo,B Sanmartin Sedes,R Santacesaria,C Santamarina Rios,M Santimaria,E Santovetti,G Sarpis,A Sarti,C Satriano, A Satta, M Saur, D Savrina,S Schael,M Schellenberg,M Schiller,H Schindler, M Schmelling, T Schmelzer,B Schmidt,O Schneider,A Schopper, H F Schreiner, M Schubiger,S Schulte, M H Schune, R Schwemmer,B Sciascia, A Sciubba, A Semennikov, E S Sepulveda,A Sergi, N Serra,J Serrano, L Sestini, A Seuthe, P Seyfert, M Shapkin, T Shears, L Shekhtman,V Shevchenko,E Shmanin, B G Siddi,R Silva Coutinho,L Silva de Oliveira, G Simi,S Simone, I Skiba, N Skidmore, T Skwarnicki, M W Slater,J G Smeaton,E Smith,I T Smith,M Smith,M Soares,L Soares Lavra, M D Sokoloff,F J P Soler,B Souza De Paula, B Spaan,E Spadaro Norella,P Spradlin, F Stagni,M Stahl,S Stahl,P Stefko,S Stefkova,O Steinkamp,S Stemmle, O Stenyakin,M Stepanova,H Stevens,A Stocchi, S Stone,S Stracka, M E Stramaglia,M Straticiuc,U Straumann,S Strokov,J Sun,L Sun,Y Sun,K Swientek,A Szabelski,T Szumlak,M Szymanski,Z Tang, T Tekampe, G Tellarini, F Teubert,E Thomas,M J Tilley, V Tisserand,S T'Jampens,M Tobin, S Tolk,L Tomassetti,D Tonelli,D Y Tou, E Tournefier, M Traill,M T Tran, A Trisovic,A Tsaregorodtsev,G Tuci,A Tully,N Tuning,A Ukleja, A Usachov,A Ustyuzhanin,U Uwer, A Vagner,V Vagnoni, A Valassi,S Valat, G Valenti,M van Beuzekom,H Van Hecke,E van Herwijnen, C B Van Hulse,J van Tilburg,M van Veghel,R Vazquez Gomez,P Vazquez Regueiro,C Vázquez Sierra,S Vecchi,J J Velthuis,M Veltri,A Venkateswaran,M Vernet, M Veronesi,M Vesterinen,J V Viana Barbosa, D Vieira,M Vieites Diaz, H Viemann,X Vilasis-Cardona, A Vitkovskiy, M Vitti,V Volkov, A Vollhardt,D Vom Bruch, B Voneki, A 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PHYSICAL REVIEW LETTERS（2019）
引用 36|浏览52
摘要
Results are reported from a search for the rare decays B-s(0) -> tau(+/-)mu(+/-) 1T and B -> tau(+/-)mu(+/-), where the r lepton is reconstructed in the channel r- irrg vr. These processes are effectively forbidden in the standard model, hut they can potentially occur at detectable rates in models of new physics that can induce lepton flavor-violating decays. The search is based on a data sample corresponding to 3 fb-1 of proton -proton collisions recorded by the LHCb experiment in 2011 and 2012. The event yields observed in the signal regions for both processes are consistent with the expected standard model backgrounds. Because of the limited mass resolution arising from the undetected r neutrino, the 1.3 and B signal regions are highly overlapping. Assuming no contribution from B r1, r, the upper limit 8(B r 71) < 4.2 x 10-5 is obtained at 95% confidence level. If no contribution from tau(+/-)mu(+/-) is assumed, a limit of B(B r prn < 1.4 x 10-5 is obtained at 95% confidence level. These results represent the first limit on B(B? r5+) and the most stringent limit on B(B tau(+/-)mu(+/-).)
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