Search for Majorana neutrinos in B- → π+ μ- μ- decays.

@article{Aaij2014SearchFM,
  title={Search for Majorana neutrinos in B- → π+ μ- μ- decays.},
  author={R. Aaij and B. Adeva and Matteo Adinolfi and A. A. Affolder and Ziad J. Ajaltouni and Joachim Albrecht and Federico Alessio and Molassiotis Alexander and Shaukat Ali and G. D. Alkhazov and P. Alvarez Cartelle and Al{\'i}rio Alex Rosa Alves and Suzana Bencke Amato and Silvia Amerio and Y. Amhis and L. Anderlini and John C Anderson and Rune Andreassen and Mirco Andreotti and Joseph Eugene Andrews and Robert B. Appleby and O. Aquines Gutierrez and F. Archilli and Andrew Vladimirovich Artamonov and Marina Artuso and E. Aslanides and Giulio Auriemma and M. Baalouch and Silke Bachmann and John Back and A. Badalov and V. Balagura and Wander Baldini and Rebecca Jo Barlow and Colin Barschel and Sergey Barsuk and William Barter and V. Batozskaya and Th. S. Bauer and A S Bay and Jason Beddow and Franco Bedeschi and Ignacio Bediaga and S. G. Belogurov and K. S. Belous and Ivan V Belyaev and Eli Ben-Haim and Giovanni Bencivenni and S. Benson and J. R. Benton and Alexey A Berezhnoy and R. Bernet and M -O Bettler and Martin van Beuzekom and Anna Bie{\~n} and Simone Bifani and Timothy A. Bird and A. Bizzeti and P. M. Bj\ornstad and Thomas Blake and François-Xavier Blanc and Johan Blouw and Steven R Blusk and Valerio Bocci and Anna A Bondar and N. Ya. Bondar and Walter Bonivento and Silvana Borghi and Andrea Borgia and Milton Borsato and T. Bowcock and Elizabeth Bowen and C. Bozzi and T. Brambach and Jo van den Brand and J. Bressieux and Dan Brett and Markward Britsch and Tom Britton and N. H. Brook and H. Benjamin. Brown and Aleksander Bursche and Giuseppe Busetto and J. A. M. A. Buytaert and Sandro Cadeddu and Rita Calabrese and Olivier Callot and Marta Calvi and M. Calvo Gomez and A. Camboni and Pierluigi Campana and Daniel Hugo Campora Perez and Angelo Carbone and Graciela Carboni and Rossella Cardinale and Alessandro Cardini and H. Carranza-Mejia and Laura Carson and K. Carvalho Akiba and G. Casse and L. Castillo Garcia and Marco Cattaneo and Ch. Cauet and Riccardo Cenci and Messrs Charles and P. Charpentier and S. F. Cheung and Nicola Chiapolini and M. Chrzaszcz and K. Ciba and X. Cid Vidal and Gregory Ciezarek and P. E. L. Clarke and M. Clemencic and H. V. Cliff and Joel Closier and Carmen Coca and Valeria F. Del Coco and J E Cogan and Eric Cogneras and Pat Collins and A. Comerma-Montells and Augusto Contu and Andrew Cook and Mike Coombes and S. Coquereau and Giacomo Corti and Ian Counts and Benjamin Couturier and Greig A. Cowan and D. C. Craik and Mario Henrique Cruz Torres and Sharon Cunliffe and Rebecca Currie and Claudia D'Ambrosio and J. Dalseno and P. N. Y. David and A. Davis and I. De Bonis and Kristof De Bruyn and S. de Capua and Marie-Cecile De Cian and J M De Miranda and Leonardo Koerich de Paula and Warusha Dhammika Dulantha de Silva and Patrizia De Simone and David Decamp and M. Deckenhoff and Luca Del Buono and N. D{\'e}l{\'e}age and Dmytro Derkach and O. Deschamps and Francesco Dettori and A. Di Canto and Henk Dijkstra and S. Domingo Donleavy and F. Dordei and Marco Dorigo and Pawel Dorosz and A. Dosil Su{\'a}rez and Dena Dossett and A. M. Dovbnya and Frederic Dupertuis and Paolo Durante and R. I. Dzhelyadin and Adam Dziurda and Alexei Dzyuba and Sajan Easo and Ulrik Egede and V. Egorychev and Simon Eidelman and Sara H Eisenhardt and Ulrich Eitschberger and R. Ekelhof and Lars Eklund and I. El Rifai and Ch. Elsasser and Antonio Falabella and Ch. F{\"a}rber and C. C. J. Farinelli and Stephen Farry and David Glen Ferguson and V. Fernandez Albor and F. Ferreira Rodrigues and M. Ferro-Luzzi and Sergei Filippov and Massimiliano Fiore and Massimiliano Fiorini and Christopher Fitzpatrick and Marcella Fontana and F. Fontanelli and Roger Forty and O. De Aguiar Francisco and Markus Frank and Christoph Frei and Massimo Ferri Patrizio Frosini and Enrico Furfaro and A. Gallas Torreira and Domenico Galli and Miriam Gandelman and Patricia Gandini and Yunpeng Gao and J. Garofoli and J. Garra Tico and L. B. Garrido and Clara Gaspar and Rhorry Gauld and Edward F Gersabeck and Marco Gersabeck and Timothy Gershon and Ph. Ghez and Alessio Gianelle and Valerie Gibson and L. Giubega and V. V. Gligorov and Carla G{\"o}bel and D. V. Golubkov and Andrei Golutvin and Anne Caroline C. Gomes and Hamish Gordon and M. Grabalosa G{\'a}ndara and R. Graciani Diaz and L. A. Granado Cardoso and Eugeni Grauges and G. Graziani and Alina Grecu and Emma Greening and Stuart Gregson and Phillip Griffith and Lucas Grillo and O. Gr{\"u}nberg and B. Gui and E. Gushchin and Yu. Guz and Thierry Gys and Ch. Hadjivasiliou and G. Haefeli and Craig Haen and T. W. Hafkenscheid and Surthrival Haines and Simon R. G. Hall and Benjamin Hamilton and Tom Hampson and Stephanie Hansmann-Menzemer and Neville Harnew and S. T. Harnew and J. Harrison and T L Hartmann and J He and T. Head and Veerle Anna Margeretha Heijne and Karol Hennessy and Pierre Henrard and J. A. Hernando Morata and Eric van Herwijnen and Mark Hess and Awatef Hicheur and Dorothea M. C. Hill and M. Hoballah and C. Hombach and Wouter Hulsbergen and Paul N. Hunt and T. Huse and N. Hussain and D. Hutchcroft and D. Hynds and V V Iakovenko and Marek Idzik and Philip Ilten and Richard Jacobsson and Andreas Jaeger and Eveline Jans and P. Jaton and Abolhassan Jawahery and Fanqi Jing and M. Samuel John and Donovan Johnson and Christopher K. R. T. Jones and Christian Joram and Beat Jost and N. Jurik and M. Kaballo and S. Kandybei and W. Kanso and M. Karacson and Till Moritz Karbach and I. R. Kenyon and Tjeerd J Ketel and B. Khanji and Chitsanu Khurewathanakul and Sjoerd O Klaver and O. Kochebina and I. Komarov and R. F. Koopman and Patrick Koppenburg and Maxim Korolev and A. Kozlinskiy and Leonid Kravchuk and Klaus Kreplin and Michal Kreps and G. Krocker and P. P. Krokovny and Florian Kruse and Mateusz Kucharczyk and Vitaly Kudryavtsev and Krzysztof Kurek and T. Kvaratskheliya and V. N. La Thi and D. H. Lacarr{\`e}re and George Lafferty and Adriano Lai and Dominique Lambert and Robert G. Lambert and E. Lanciotti and Giordano Lanfranchi and Christina Langenbruch and T. Latham and Cristina Lazzeroni and R. Le Gac and Jan A van Leerdam and J -P Lees and R{\'e}gis Lef{\`e}vre and A. K. Leflat and J. Lefrancois and S. Leo and Oliviez Leroy and Tadeusz Lesiak and B. D. Leverington and Yuanjing. Li and M. A. Liles and Richard Lindner and Cuneifolium Linn and Fanshen Lionetto and Ben Q. Liu and Guoming Liu and Stefan Lohn and Ian Dennis Longstaff and Jorge Lopes and Neus LOPEZ-MARCH and P. J. Lowdon and Hua-pu Lu and Donatella Lucchesi and J. Luisier and Huiqian Luo and Enrica Luppi and O. Lupton and F. Machefert and I. V. Machikhiliyan and Florin Maciuc and O. E. Maev and Sachit Malde and Giovanni Manca and Giampiero Mancinelli and Matteo Manzali and J. Maratas and Umberto Marconi and Perfecto Mari{\~n}o and R. M{\"a}rki and Justin Marks and G. Martellotti and A. Martens and A. Mart{\'i}n S{\'a}nchez and Maurizio. Martinelli and D. Mart{\'i}nez Santos and D. Martins Tostes and A. Massafferri and R. Matev and Zsolt Mathe and Clara Matteuzzi and Anatoly Mazurov and Melissa McCann and John McCarthy and A. Mcnab and Ronan McNulty and B. McSkelly and Barbara Meadows and Fabian W. Meier and M. Meissner and Marcel Merk and Diego A. Milan{\'e}s and M. N. Minard and J. Molina Rodriguez and S. Monteil and Dawn Moran and Mattia Morandin and Piotr Morawski and Alessandro Mord{\'a} and Michelle Morello and Rachel Mountain and I. Mous and Franz Muheim and Klaus M{\"u}ller and R. Muresan and B. Muryn and Britta Muster and Pallavi Umesh Naik and Tatsuya Nakada and R. Nandakumar and Irina Nasteva and Micah Needham and Susanne Neubert and Niko Neufeld and A. Dung Nguyen and Tung Doan Nguyen and C. Nguyen-Mau and Michael Nicol and Valentin Niess and Ramon Niet and Nikolai Nikitin and T. Nikodem and Alexey Novoselov and A. Oblakowska-Mucha and V. A. Obraztsov and S. Oggero and Sandy Ogilvy and O. B. Okhrimenko and Roelof A. A. Oldeman and G. J. G. Onderwater and Monica Orlandea and J. M. Otalora Goicochea and Paul Owen and Arantza Oyanguren and Beerendra Kumar Pal and Antimo Palano and Matteo Palutan and Jaap Panman and Antonis Papanestis and M. Pappagallo and Luciano Libero Pappalardo and Chris Parkes and Charles Parkinson and Giovanni Passaleva and G. D. Patel and Mitesh Patel and C. Patrignani and C. Pavel-Nicorescu and A. Pazos Alvarez and Author Lynne Pearce and Antonio Pellegrino and Giuseppe Penso and M. Pepe Altarelli and Stefano Perazzini and E. Perez Trigo and Pascal Perret and M. Perrin-Terrin and Luca Pescatore and Ercan Pesen and Gianluigi Pessina and Konstantinos Petridis and A. Petrolini and E. Picatoste Olloqui and B J Pietrzyk and The BRASS El Pilar and Davide Pinci and Antonio Pistone and Stephen Playfer and M. Plo Casasus and F. Polci and G. Polok and A. O. Poluektov and E. Polycarpo and Alexey V. Popov and Du{\vs}an Popov and Bianca Popovici and C. Potterat and Andrew Powell and Jessica Prisciandaro and Andrew Pritchard and C. Prouve and Valery Pugatch and A. Puig Navarro and Giovanni Punzi and Wenbin Qian and Bogumila Rachwal and Jonas Rademacker and B. Rakotomiaramanana and Mehta Rama and Mendez Rangel and I. Raniuk and Nathalie Rauschmayr and G. Raven and S. Redford and Stefanie Reichert and M Masso Reid and Ant{\^o}nio Carlos Faria dos Reis and S{\'e}bastien Ricciardi and Anne Richards and Kurt Rinnert and V. Rives Molina and D. A. Roa Romero and Pieterjan Robbe and Douglas A Roberts and Ana Beatriz Rodrigues and Elizandro Rodrigues and Paz Rodr{\'i}guez P{\'e}rez and S. Roiser and Vladimir Romanovsky and A. Romero Vidal and Marcello Rotondo},
  journal={Physical review letters},
  year={2014},
  volume={112 13},
  pages={131802}
}
A search for heavy Majorana neutrinos produced in the B- → π+ μ- μ- 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- → π+ μ- μ-) as functions of neutrino mass and lifetime. These limits are on the… CONTINUE READING
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