LHCB ColldborationAaij, R.Adeva, B.Adinolfi, M.Ajaltouni, Z.Akar, S.Albrecht, J.Alessio, F.Alexander, M.Ali, S.Alkhazov, G.Cartelle, R. AlvarezAmato, S.Amerio, S.Amhis, Y.An, L.Anderlini, L.Andreassi, G.Andreotti, M.Andrews, J. E.Appleby, R. B.Archilli, F.D'Argent, R.Romeu, J. ArnauArtamonov, A.Artuso, M.Aslanides, E.Auriemma, G.Baalouch, M.Babuschkin, I.Bachmann, S.Back, J. J.Badalov, A.Baesso, C.Baker, S.Balagura, V.Baldini, W.Barlow, R. J.Barschel, C.Barsuk, S.Barter, W.Baryshnikov, F.Baszczyk, M.Batozskaya, V.Batsukh, B.Battista, V.Bay, A.Beaucourt, L.Beddow, J.Bedeschi, F.Bediaga, I.Bel, L. J.Bellee, V.Belloli, N.Belous, K.Belyaev, I.Ben-Haim, E.Bencivenni, G.Benson, S.Berezhnoy, A.Bernet, R.Bertolin, A.Betancourt, C.Betti, F.Bettler, M. -O.Van Beuzekom, M.Bershyiko, Ia.Bifani, S.Billoir, R.Bird, T.Birnkraut, A.Bitadze, A.Bizzetils, A.Blake, T.Blanc, F.Blouw, J.Blusk, S.Bocci, V.Boettcher, T.Bondar, A.Bondar, N.Bonivento, W.Bordyuzhin, I.Borgheresi, A.Borghi, S.Borisyak, M.Borsato, M.Bossu, F.Boubdir, M.Bowcock, T. J. V.Bowen, E.Bozzi, C.Braun, S.Britsch, M.Britton, T.Brodzicka, J.Buchanan, E.Burr, C.Bursche, A.Buytaert, J.Cadeddu, S.Calabrese, R.Calvi, M.Calvo Gomez, M.Camboni, A.Campana, R.Perez, D. H. CamporaCapriotti, L.Carbone, A.Carboni, G.Cardinale, R.Cardini, A.Carniti, P.Carson, L.Akiba, K. CarvalhoCasse, G.Cassina, L.Garcia, L. CastilloCattaneo, M.Cavallero, G.Cenci, R.Chamont, D.Charles, M.Charpentier, Ph.Chatzikonstantinidis, G.Chefdeville, M.Chen, S.Cheung, S. -F.Chobanova, V.Chrzaszcz, M.Cid Vidal, X.Ciezarek, G.Clarke, P. E. L.Clemencic, M.Cliff, H. V.Closier, J.Coco, V.Cogan, J.Cogneras, E.Cogoni, V.Cojocariu, L.Collazuol, G.Collinsol, R.Comerma-Montells, A.Contu, A.Cook, A.Coombs, G.Coquereau, S.Corti, G.Corvo, M.Sobral, C. M. CostaCouturier, B.Cowan, G. A.Craik, D. C.Crocombe, A.Torres, M. CruzCunliffe, S.Currie, R.D'Ambrosio, C.Marinho, F. Da CunhaDall'Occo, E.Dalseno, J.David, P. N. Y.Davis, A.De Bruyn, K.De Capua, S.De Cian, M.De Miranda, J. M.De Paula, L.De Serio, M.De Simone, P.Dean, C. T.Decamp, D.Deckenhoff, M.Del Buono, L.Demmer, M.Dendek, A.Derkach, D.Deschamps, O.Dettori, F.Dey, B.Di Canto, A.Dijkstra, H.Dordei, F.Dorigo, M.Suarez, A. DosilDovbnya, A.Dreimanis, K.Dufour, L.Dujany, G.Dungs, K.Durante, R.Dzhelyadin, R.Dziurda, A.Dzyuba, A.Deleage, N.Easo, S.Ebert, M.Egede, U.Egorychev, V.Eidelman, S.Eisenhardt, S.Eitschberger, U.Ekelhof, R.Eklund, L.Ely, S.Esen, S.Evans, H. M.Evans, T.Falabella, A.Farley, N.Farry, S.Fay, R.Fazzini, D.Ferguson, D.Fernandez Prieto, A.Ferrari, F.Rodrigues, F. FerreiraFerro-Luzzi, M.Filippov, S.Fini, R. A.Fiore, M.Fiorini, M.Firlej, M.Fitzpatrick, C.Fiutowski, T.Fleuret, F.Fohl, K.Fontana, M.Fontanelli, F.Forshaw, D. C.Forty, R.Lima, V. FrancoFrank, M.Frei, C.Fu, J.Funk, W.Furfaro, E.Farber, C.Gallas Torreira, A.Galli, D.Gallorini, S.Gambetta, S.Gandelman, M.Gandini, R.Gao, Y.Garcia Martin, L. M.Garcia Pardinas, J.Tico, J. GarraGarrido, L.Garsed, P. J.Gascon, D.Gaspar, C.Gavardi, L.Gazzoni, G.Gerick, D.Gersabeck, E.Gersabeck, M.Gershon, T.Ghez, Ph.Giani, S.Gibson, V.Girard, O. G.Giubega, L.Gizdov, K.Gligorov, V. V.Golubkov, D.Golutvin, A.Gomes, A.Gorelov, I. V.Gotti, C.Graciani Diaz, R.Cardoso, L. A. GranadoGrauges, E.Graverini, E.Graziani, G.Grecu, A.Griffith, R.Grillo, L.Cazon, B. R. GrubergGruenberg, O.Gushchin, E.Guz, Yu.Gys, T.Gobel, C.Hadavizadeh, T.Hadjivasiliou, C.Haefeli, G.Haen, C.Haines, S. C.Hamilton, B.Han, X.Hansmann-Menzemer, S.Harnew, N.Harnews, S. T.Harrison, J.Hatch, M.He, J.Head, T.Heister, A.Hennessy, K.Henrard, R.Henrys, L.Van Herwijnen, E.Hess, M.Hicheur, A.Hill, D.Hombach, C.Hopchev, H.Hulsbergen, W.Humair, T.Hushchyn, M.Hutchcroft, D.Idzik, M.Ilten, R.Jacobsson, R.Jaeger, A.Jalocha, J.Jans, E.Jawahery, A.Jiang, F.John, M.Johnson, D.Jones, C. R.Joram, C.Jost, B.Jurik, N.Kandybei, S.Karacson, M.Kariuki, J. M.Karodia, S.Kecke, M.Kelsey, M.Kenzie, M.Ketel, T.Khairullin, E.Khanji, B.Khurewathanakul, C.Kirn, T.Klaver, S.Klimaszewski, K.Koliiev, S.Kolpin, M.Komarov, I.Koppenburg, R.Kosmyntseva, A.Kozachuk, A.Kozeiha, M.Kravchuk, L.Kreplin, K.Kreps, M.Krokovny, R.Kruse, F.Krzemien, W.Kucewicz, W.Kucharczyk, M.Kudryavtsev, V.Kuonen, A. K.Kurek, K.Kvaratskheliya, T.Lacarrere, D.Lafferty, G.Lai, A.Lanfranchi, G.Langenbruch, C.Latham, T.Lazzeroni, C.Le Gac, R.Van Leerdam, J.Leflat, A.Lefrancois, J.Lefevre, R.Lemaitre, F.Lemos Cid, E.Leroy, O.Lesiak, T.Leverington, B.Li, T.Li, Y.Likhomanenko, T.Lindner, R.Linn, C.Lionetto, F.Liu, X.Loh, D.Longstaff, I.Lopes, J. H.Lucchesi, D.Lucio Martinez, M.Luo, H.Lupato, A.Luppi, E.Lupton, O.Lusiani, A.Lyu, X.Machefert, F.Maciuc, F.Maev, O.Maguire, K.Malde, S.Malinin, A.Maltsev, T.Manca, G.Mancinelli, G.Manning, P.Maratas, J.Marchand, J. F.Marconi, U.Benito, C. MarinMarinangeli, M.Marino, P.Marks, J.Martellotti, G.Martin, M.Martinelli, M.Martinez Santos, D.Martinez Vidal, F.Tostes, D. MartinsMassacrier, L. M.Massafferri, A.Matev, R.Mathad, A.Mathe, Z.Matteuzzi, C.Mauri, A.Maurice, E.Maurin, B.Mazurov, A.Mccann, M.Mcnab, A.Mcnulty, R.Meadows, B.Meier, F.Meissner, M.Melnychuk, D.Merk, M.Merli, A.Michielin, E.Milanes, D. A.Minard, M. -N.Mitzel, D. S.Mogini, A.Rodriguez, J. MolinaMonroy, I. A.Montei, S.Morandin, M.Morawski, R.Morda, A.Morello, M. J.Morgunova, O.Moron, J.Morris, A. B.Mountain, R.Muheim, F.Mulder, M.Mussini, M.Mueller, D.Mueller, J.Mueller, K.Mueller, V.Naik, P.Nakada, T.Nandakumar, R.Nandi, A.Nasteva, I.Needham, M.Neri, N.Neubert, S.Neufeld, N.Neuner, M.Nguyen, T. D.Nguyen-Mau, C.Nieswand, S.Niet, R.Nikitin, N.Nikodem, T.Nogay, A.Novoselov, A.O'Hanlon, D. P.Oblakowska-Mucha, A.Obraztsov, V.Ogilvy, S.Oldeman, R.Onderwater, C. J. G.Otalora Goicochea, J. M.Otto, A.Owen, P.Oyanguren, A.Pais, P. R.Palano, A.Palombo, F.Palutan, M.Papanestis, A.Pappagallo, M.Pappalardo, L. L.Parker, W.Parkes, C.Passaleva, G.Pastore, A.Patel, G. D.Patel, M.Pearce, A.Pellegrino, A.Penso, G.Altarelli, M. PepePerazzini, S.Perret, P.Pescatore, L.Petridis, K.Petrolini, A.Petrov, A.Petruzzo, M.Picatoste Olloqi, E.Pietrzyk, B.Pikies, M.Pinci, D.Pistone, A.Piucci, A.Placinta, V.Playfer, S.Plo Casasus, M.Poikela, T.Polci, F.Poluektov, A.Polyakov, I.Polycarpo, E.Pomery, G. J.Popov, A.Popov, D.Popovici, B.Poslayskii, S.Potterat, C.Price, E.Price, J. D.Prisciandaro, J.Pritchard, A.Prouve, C.Pugatch, V.Navarro, A. PuigPunzi, G.Qian, W.Quagliani, R.Rachwal, B.Rademacker, J. H.Rama, M.Ramos Pernas, M.Rangel, M. S.Raniuk, I.Ratnikov, F.Raven, G.Redi, F.Reichert, S.Dos Reis, A. C.Remon Alepuz, C.Renaudin, V.Ricciardi, S.Richards, S.Rih, M.Rinnert, K.Rives Molina, V.Robbe, R.Rodrigues, A. B.Rodrigues, E.Rodriguez Lopez, J. A.Perez, R. RodriguezRogozhnikov, A.Roiser, S.Rollings, A.Romanovskiy, V.Romero Vidal, A.Ronayne, J. W.Rotondo, M.Rudolph, M. S.Ruf, T.Ruiz Valls, R.Saborido Silva, J. J.Sadykhov, E.Sagidova, N.Saitta, B.Guimaraes, V. SalustinoSanchez Mayordomo, C.Sanmartin Sedes, B.Santacesaria, R.Santamarina Rios, C.Santimaria, M.Santovetti, E.Sarti, A.Satriano, C.Satta, A.Saunders, D. M.Savrina, D.Schael, S.Schellenberg, M.Schiller, M.Schindler, H.Schlupp, M.Schmelling, M.Schmelzer, T.Schmidt, B.Schneider, O.Schopper, A.Schubert, K.Schubiger, M.Schune, M. -H.Schwemmer, R.Sciascia, B.Sciubba, A.Semennikov, A.Sergi, A.Serra, N.Serrano, J.Sestini, L.Seyfert, P.Shapkin, M.Shapoval, I.Shcheglov, Y.Shears, T.Shekhtman, L.Shevchenko, V.Siddi, B. G.Coutinho, R. SilvaDe Oliveira, L. SilvaSimi, G.Simone, S.Sirendi, M.Skidmore, N.Skwarnicki, T.Smith, E.Smith, I. T.Smith, J.Smith, M.Snoek, H.Lavra, L. SoaresSokoloff, M. D.Soler, F. J. P.De Paula, B. SouzaSpaan, B.Spradlin, P.Sridharan, S.Stagni, F.Stahl, M.Stahl, S.Stefko, P.Stefkova, S.Steinkamp, O.Stemmle, S.Stenyakin, O.Stevens, H.Stevenson, S.Stoica, S.Stone, S.Storaci, B.Stracka, S.Straticiuc, M.Straumann, U.Sun, L.Sutcliffe, W.Swientek, K.Syropoulos, V.Szczekowski, M.Szumlak, T.T'Jampens, S.Tayduganov, A.Tekampe, T.Tellarini, G.Teubert, F.Thomas, E.Van Tilburg, J.Tilley, M. J.Tisserand, V.Tobin, M.Tolk, S.Tomassetti, L.Tonelli, D.Topp-Joergensen, S.Toriello, F.Tournefier, E.Tourneur, S.Trabelsi, K.Traill, M.Tran, M. T.Tresch, M.Trisovic, A.Tsaregorodtsev, A.Tsopelas, R.Tully, A.Tuning, N.Ukleja, A.Ustyuzhanin, A.Uwer, U.Vacca, C.Vagnoni, V.Valassi, A.Valat, S.Valenti, G.Gomez, R. VazquezVazquez Regueiro, R.Vecchi, S.Van Veghel, M.Velthuis, J. J.Veltri, M.Veneziano, G.Venkateswaran, A.Vernet, M.Vesterinen, M.Barbosa, J. V. VianaViaud, B.Vieira, D.Vieites Diaz, M.Viemann, H.Vilasis-Cardona, X.Vitti, M.Volkov, V.Vollhardt, A.Voneki, B.Vorobyev, A.Vorobyev, V.Voss, C.De Vries, J. A.Vazquez Sierra, C.Waldi, R.Wallace, C.Wallace, R.Walsh, J.Wang, J.Ward, D. R.Wark, H. M.Watson, N. K.Websdale, D.Weiden, A.Whitehead, M.Wicht, J.Wilkinson, G.Wilkinson, M.Williams, M.Williams, M. P.Williams, M.Williams, T.Wilson, F. F.Wimberley, J.Wishahi, J.Wislicki, W.Witek, M.Wormser, G.Wotton, S. A.Wraight, K.Wyllie, K.Xie, Y.Xing, Z.Xu, Z.Yang, Z.Yao, Y.Yin, H.Yu, J.Yuan, X.Yushchenko, O.Zarebski, K. A.Zavertyaev, M.Zhang, L.Zhang, Y.Zhang, Y.Zhelezov, A.Zheng, Y.Zhu, X.Zhukov, V.Zucchelli, S.2017-11-082017-11-082017-11-08201710.1016/j.physletb.2017.06.045https://infoscience.epfl.ch/handle/20.500.14299/142066WOS:000411369700042The observation of the decay Xi(-)(b)-> J/psi Lambda K- is reported, using a data sample corresponding to an integrated luminosity of 3 fb(-1), collected by the LHCb detector in pp collisions at centre-of-mass energies of 7 and 8 TeV. The production rate of Xi(-)(b) baryons detected in the decay Xi(-)(b) -> J/psi Lambda K- is measured relative to that of Lambda(0)(b) baryons using the decay Lambda(0)(b) -> J/psi Lambda. Integrated over the b-baryon transverse momentum p(T) < 25 GeV/c and rapidity 2.0 < y < 4.5, the measured ratio is f Xi(-)(b/) f Lambda(0)(b) B(Xi(-)(b)-> J/psi Lambda K-) / B(Lambda(0)(b)-> J/psi Lambda) = (4.19 +/- 0.29 (stat) +/- 0.15 (syst)) x 10(-2), where f(Xi)(b)(-) band f(Lambda)(b)(0)are the fragmentation fractions of b ->Xi(-)(b)and b ->Lambda(0)(b)transitions, and ss represents the branching fraction of the corresponding b- baryon decay. The mass difference between Xi(-)(b) and Lambda(0)(b) baryons is measured to be M(Xi(-)(b))-M(Lambda(0)(b)) = 177.08 +/- 0.47 (stat) +/- 0.16 (syst) MeV/c(2). (C) 2017 The Author(s). Published by Elsevier B.V.text::journal::journal article::research article