LHCb CollaborationAaij, R.Adeva, B.Adinolfi, M.Affolder, A.Ajaltouni, Z.Albrecht, J.Alessio, F.Alexander, M.Ali, S.Alkhazov, G.Alvarez Cartelle, P.Amato, S.Amerio, S.Amhis, Y.Anderlini, L.Anderson, J.Andreassen, R.Andreotti, M.Andrews, J. E.Appleby, R. B.Gutierrez, O. AquinesArchilli, F.Artamonov, A.Artuso, M.Aslanides, E.Auriemma, G.Baalouch, M.Bachmann, S.Back, J. J.Badalov, A.Balagura, V.Baldini, W.Barlow, R. J.Barschel, C.Barsuk, S.Barter, W.Batozskaya, V.Bauer, T.Bay, A.Beddow, J.Bedeschi, F.Bediaga, I.Belogurov, S.Belous, K.Belyaev, I.Ben-Haim, E.Bencivenni, G.Benson, S.Benton, J.Berezhnoy, A.Bernet, R.Bettler, M. -O.Van Beuzekom, M.Bien, A.Bifani, S.Bird, T.Bizzeti, A.Bjornstad, P. M.Blake, T.Blanc, F.Blouw, J.Blusk, S.Bocci, V.Bondar, A.Bondar, N.Bonivento, W.Borghi, S.Borgia, A.Borsato, M.Bowcock, T. J. V.Bowen, E.Bozzi, C.Brambach, T.Van Den Brand, J.Bressieux, J.Brett, D.Britsch, M.Britton, T.Brook, N. H.Brown, H.Bursche, A.Busetto, G.Buytaert, J.Cadeddu, S.Calabrese, R.Callot, O.Calvi, M.Calvo Gomez, M.Camboni, A.Campana, P.Perez, D. CamporaCarbone, A.Carboni, G.Cardinale, R.Cardini, A.Carranza-Mejia, H.Carson, L.Akiba, K. CarvalhoCasse, G.Garcia, L. CastilloCattaneo, M.Cauet, C.Cenci, R.Charles, M.Charpentier, P.Cheung, S. -F.Chiapolini, N.Chrzaszcz, M.Ciba, K.Vidal, X. CidCiezarek, G.Clarke, P. E. L.Clemencic, M.Cliff, H. V.Closier, J.Coca, C.Coco, V.Cogan, J.Cogneras, E.Collins, P.Comerma-Montells, A.Contu, A.Cook, A.Coombes, M.Coquereau, S.Corti, G.Counts, I.Couturier, B.Cowan, G. A.Craik, D. C.Torres, M. CruzCunliffe, S.Currie, R.D'Ambrosio, C.Dalseno, J.David, P.David, P. N. Y.Davis, A.De Bonis, I.De Bruyn, K.De Capua, S.De Cian, M.De Miranda, J. M.De Paula, L.De Silva, W.De Simone, P.Decamp, D.Deckenhoff, M.Del Buono, L.Deleage, N.Derkach, D.Deschamps, O.Dettori, F.Di Canto, A.Dijkstra, H.Donleavy, S.Dordei, F.Dorigo, M.Dorosz, P.Dosil Suarez, A.Dossett, D.Dovbnya, A.Dupertuis, F.Durante, P.Dzhelyadin, R.Dziurda, A.Dzyuba, A.Easo, S.Egede, U.Egorychev, V.Eidelman, S.Eisenhardt, S.Eitschberger, U.Ekelhof, R.Eklund, L.El Rifai, I.Elsasser, C.Falabella, A.Faerber, C.Farinelli, C.Farry, S.Ferguson, D.Fernandez Albor, V.Rodrigues, F. FerreiraFerro-Luzzi, M.Filippov, S.Fiore, M.Fiorini, M.Fitzpatrick, C.Fontana, M.Fontanelli, F.Forty, R.Francisco, O.Frank, M.Frei, C.Frosini, M.Furfaro, E.Gallas Torreira, A.Galli, D.Gandelman, M.Gandini, P.Gao, Y.Garofoli, J.Tico, J. GarraGarrido, L.Gaspar, C.Gauld, R.Gersabeck, E.Gersabeck, M.Gershon, T.Ghez, P.Gianelle, A.Gibson, V.Giubega, L.Gligorov, V. V.Goebel, C.Golubkov, D.Golutvin, A.Gomes, A.Gordon, H.Gandara, M. GrabalosaGraciani Diaz, R.Cardoso, L. A. GranadoGrauges, E.Graziani, G.Grecu, A.Greening, E.Gregson, S.Griffith, P.Grillo, L.Gruenberg, O.Gui, B.Gushchin, E.Guz, Y.Gys, T.Hadjivasiliou, C.Haefeli, G.Haen, C.Hafkenscheid, T. W.Haines, S. C.Hall, S.Hamilton, B.Hampson, T.Hansmann-Menzemer, S.Harnew, N.Harnew, S. T.Harrison, J.Hartmann, T.He, J.Head, T.Heijne, V.Hennessy, K.Henrard, P.Hernando Morata, J. A.Van Herwijnen, E.Hess, M.Hicheur, A.Hill, D.Hoballah, M.Hombach, C.Hulsbergen, W.Hunt, P.Huse, T.Hussain, N.Hutchcroft, D.Hynds, D.Iakovenko, V.Idzik, M.Ilten, P.Jacobsson, R.Jaeger, A.Jans, E.Jaton, P.Jawahery, A.Jing, F.John, M.Johnson, D.Jones, C. R.Joram, C.Jost, B.Jurik, N.Kaballo, M.Kandybei, S.Kanso, W.Karacson, M.Karbach, T. M.Kenyon, I. R.Ketel, T.Khanji, B.Khurewathanakul, C.Klaver, S.Kochebina, O.Komarov, I.Koopman, R. F.Koppenburg, P.Korolev, M.Kozlinskiy, A.Kravchuk, L.Kreplin, K.Kreps, M.Krocker, G.Krokovny, P.Kruse, F.Kucharczyk, M.Kudryavtsev, V.Kurek, K.Kvaratskheliya, T.La Thi, V. 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J. P.Soomro, F.Souza, D.De Paula, B. SouzaSpaan, B.Sparkes, A.Spinella, F.Spradlin, P.Stagni, F.Stahl, S.Steinkamp, O.Stevenson, S.Stoica, S.Stone, S.Storaci, B.Stracka, S.Straticiuc, M.Straumann, U.Stroili, R.Subbiah, V. K.Sun, L.Sutcliffe, W.Swientek, S.Syropoulos, V.Szczekowski, M.Szczypka, P.Szilard, D.Szumlak, T.T'Jampens, S.Teklishyn, M.Tellarini, G.Teodorescu, E.Teubert, F.Thomas, C.Thomas, E.Van Tilburg, J.Tisserand, V.Tobin, M.Tolk, S.Tomassetti, L.Tonelli, D.Topp-Joergensen, S.Torr, N.Tournefier, E.Tourneur, S.Tran, M. T.Tresch, M.Tsaregorodtsev, A.Tsopelas, P.Tuning, N.Garcia, M. UbedaUkleja, A.Ustyuzhanin, A.Uwer, U.Vagnoni, V.Valenti, G.Vallier, A.Gomez, R. VazquezVazquez Regueiro, P.Vazquez Sierra, C.Vecchi, S.Velthuis, J. J.Veltri, M.Veneziano, G.Vesterinen, M.Viaud, B.Vieira, D.Vilasis-Cardona, X.Vollhardt, A.Volyanskyy, D.Voong, D.Vorobyev, A.Vorobyev, V.Voss, C.Voss, H.De Vries, J. A.Waldi, R.Wallace, C.Wallace, R.Wandernoth, S.Wang, J.Ward, D. R.Watson, N. K.Webber, A. D.Websdale, D.Whitehead, M.Wicht, J.Wiechczynski, J.Wiedner, D.Wiggers, L.Wilkinson, G.Williams, M. P.Williams, M.Wilson, F. F.Wimberley, J.Wishahi, J.Wislicki, W.Witek, M.Wormser, G.Wotton, S. A.Wright, S.Wu, S.Wyllie, K.Xie, Y.Xing, Z.Yang, Z.Yuan, X.Yushchenko, O.Zangoli, M.Zavertyaev, M.Zhang, F.Zhang, L.Zhang, W. C.Zhang, Y.Zhelezov, A.Zhokhov, A.Zhong, L.Zvyagin, A.2014-05-192014-05-192014-05-19201410.1103/PhysRevLett.112.131802https://infoscience.epfl.ch/handle/20.500.14299/103453WOS:000334339700002A search for heavy Majorana neutrinos produced in the B- -> pi(+)mu(-)mu(-) decay mode is performed using 3 fb(-1) of integrated luminosity collected with the LHCb detector in pp collisions at center-of-mass energies of 7 and 8 TeV at the LHC. Neutrinos with masses in the range 250 to 5000 MeV and lifetimes from zero to 1000 ps are probed. In the absence of a signal, upper limits are set on the branching fraction B(B- -> pi(+)mu(-)mu(-)) as functions of neutrino mass and lifetime. These limits are on the order of 10(-9) for short neutrino lifetimes of 1 ps or less. Limits are also set on the coupling between the muon and a possible fourth-generation neutrino.text::journal::journal article::research article