CERN Accelerating science

Article
Report number arXiv:1412.6433 ; CERN-PH-EP-2014-296 ; LHCB-PAPER-2014-063 ; CERN-PH-EP-2014-296 ; LHCB-PAPER-2014-063
Title Study of the rare $B_s^0$ and $B^0$ decays into the $\pi^+\pi^-\mu^+\mu^-$ final state
Author(s)

Aaij, Roel (NIKHEF, Amsterdam) ; Adeva, Bernardo (U. Santiago de Compostela (main)) ; Adinolfi, Marco (Bristol U.) ; Affolder, Anthony (Liverpool U.) ; Ajaltouni, Ziad (Clermont-Ferrand U.) ; Akar, Simon (Marseille, CPPM) ; Albrecht, Johannes (Tech. U., Dortmund (main)) ; Alessio, Federico (CERN) ; Alexander, Michael (Glasgow U.) ; Ali, Suvayu (NIKHEF, Amsterdam) ; Alkhazov, Georgy (St. Petersburg, INP) ; Alvarez Cartelle, Paula (U. Santiago de Compostela (main)) ; Alves Jr, Antonio Augusto (INFN, Rome ; CERN) ; Amato, Sandra (Rio de Janeiro Federal U.) ; Amerio, Silvia (INFN, Padua) ; Amhis, Yasmine (Orsay, LAL) ; An, Liupan (Peking U., CHEP) ; Anderlini, Lucio (INFN, Florence ; Florence U.) ; Anderson, Jonathan (Zurich U.) ; Andreassen, Rolf (Cincinnati U.) ; Andreotti, Mirco (INFN, Ferrara ; Ferrara U.) ; Andrews, Jason (Maryland U., College Park) ; Appleby, Robert (Manchester U.) ; Aquines Gutierrez, Osvaldo (Heidelberg, Max Planck Inst.) ; Archilli, Flavio (CERN) ; Artamonov, Alexander (Serpukhov, IHEP) ; Artuso, Marina (Syracuse U.) ; Aslanides, Elie (Marseille, CPPM) ; Auriemma, Giulio (INFN, Rome ; Basilicata U., Potenza) ; Baalouch, Marouen (Clermont-Ferrand U.) ; Bachmann, Sebastian (Heidelberg U.) ; Back, John (Warwick U.) ; Badalov, Alexey (U. Barcelona (main)) ; Baesso, Clarissa (Rio de Janeiro, Pont. U. Catol.) ; Baldini, Wander (INFN, Ferrara) ; Barlow, Roger (Manchester U.) ; Barschel, Colin (CERN) ; Barsuk, Sergey (Orsay, LAL) ; Barter, William (Cambridge U.) ; Batozskaya, Varvara (NCBJ, Swierk) ; Battista, Vincenzo (Ecole Polytechnique, Lausanne) ; Bay, Aurelio (Ecole Polytechnique, Lausanne) ; Beaucourt, Leo (Annecy, LAPP) ; Beddow, John (Glasgow U.) ; Bedeschi, Franco (INFN, Pisa) ; Bediaga, Ignacio (Rio de Janeiro, CBPF) ; Belogurov, Sergey (Moscow, ITEP) ; Belous, Konstantin (Serpukhov, IHEP) ; Belyaev, Ivan (Moscow, ITEP) ; Ben-Haim, Eli (Paris U., VI-VII) ; Bencivenni, Giovanni (Frascati) ; Benson, Sean (CERN) ; Benton, Jack (Bristol U.) ; Berezhnoy, Alexander (SINP, Moscow) ; Bernet, Roland (Zurich U.) ; Bertolin, Alessandro (INFN, Padua) ; Bettler, Marc-Olivier (Cambridge U.) ; van Beuzekom, Martinus (NIKHEF, Amsterdam) ; Bien, Alexander (Heidelberg U.) ; Bifani, Simone (Birmingham U.) ; Bird, Thomas (Manchester U.) ; Bizzeti, Andrea (INFN, Florence ; U. Modena (main)) ; Bjørnstad, Pål Marius (Manchester U.) ; Blake, Thomas (Warwick U.) ; Blanc, Frédéric (Ecole Polytechnique, Lausanne) ; Blouw, Johan (Heidelberg, Max Planck Inst.) ; Blusk, Steven (Syracuse U.) ; Bocci, Valerio (INFN, Rome) ; Bondar, Alexander (Novosibirsk, IYF ; Novosibirsk State U.) ; Bondar, Nikolay (St. Petersburg, INP ; CERN) ; Bonivento, Walter (INFN, Cagliari) ; Borghi, Silvia (Manchester U.) ; Borgia, Alessandra (Syracuse U.) ; Borsato, Martino (Orsay, LAL) ; Bowcock, Themistocles (Liverpool U.) ; Bowen, Espen Eie (Zurich U.) ; Bozzi, Concezio (INFN, Ferrara) ; Brett, David (Manchester U.) ; Britsch, Markward (Heidelberg, Max Planck Inst.) ; Britton, Thomas (Syracuse U.) ; Brodzicka, Jolanta (Manchester U.) ; Brook, Nicholas (Bristol U.) ; Bursche, Albert (Zurich U.) ; Buytaert, Jan (CERN) ; Cadeddu, Sandro (INFN, Cagliari) ; Calabrese, Roberto (INFN, Ferrara ; Ferrara U.) ; Calvi, Marta (INFN, Milan Bicocca ; Milan Bicocca U.) ; Calvo Gomez, Miriam (U. Barcelona (main) ; Ramon Llull U., Barcelona) ; Campana, Pierluigi (Frascati) ; Campora Perez, Daniel (CERN) ; Capriotti, Lorenzo (Manchester U.) ; Carbone, Angelo (INFN, Bologna ; Bologna U.) ; Carboni, Giovanni (INFN, Rome2 ; Rome U., Tor Vergata) ; Cardinale, Roberta (INFN, Genoa ; CERN ; Genoa U.) ; Cardini, Alessandro (INFN, Cagliari) ; Carson, Laurence (Edinburgh U.) ; Carvalho Akiba, Kazuyoshi (Rio de Janeiro Federal U. ; CERN) ; Casanova Mohr, Raimon (U. Barcelona (main)) ; Casse, Gianluigi (Liverpool U.) ; Cassina, Lorenzo (INFN, Milan Bicocca ; Milan Bicocca U.) ; Castillo Garcia, Lucia (CERN) ; Cattaneo, Marco (CERN) ; Cauet, Christophe (Tech. U., Dortmund (main)) ; Cenci, Riccardo (INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Charles, Matthew (Paris U., VI-VII) ; Charpentier, Philippe (CERN) ; Chefdeville, Maximilien (Annecy, LAPP) ; Chen, Shanzhen (Manchester U.) ; Cheung, Shu-Faye (Oxford U.) ; Chiapolini, Nicola (Zurich U.) ; Chrzaszcz, Marcin (Zurich U. ; Cracow, INP) ; Cid Vidal, Xabier (CERN) ; Ciezarek, Gregory (NIKHEF, Amsterdam) ; Clarke, Peter (Edinburgh U.) ; Clemencic, Marco (CERN) ; Cliff, Harry (Cambridge U.) ; Closier, Joel (CERN) ; Coco, Victor (CERN) ; Cogan, Julien (Marseille, CPPM) ; Cogneras, Eric (Clermont-Ferrand U.) ; Cogoni, Violetta (INFN, Cagliari ; Cagliari U.) ; Cojocariu, Lucian (Bucharest, IFIN-HH) ; Collazuol, Gianmaria (INFN, Padua) ; Collins, Paula (CERN) ; Comerma-Montells, Albert (Heidelberg U.) ; Contu, Andrea (INFN, Cagliari ; CERN) ; Cook, Andrew (Bristol U.) ; Coombes, Matthew (Bristol U.) ; Coquereau, Samuel (Paris U., VI-VII) ; Corti, Gloria (CERN) ; Corvo, Marco (INFN, Ferrara ; Ferrara U.) ; Counts, Ian (MIT) ; Couturier, Benjamin (CERN) ; Cowan, Greig (Edinburgh U.) ; Craik, Daniel Charles (Warwick U.) ; Crocombe, Andrew (Warwick U.) ; Cruz Torres, Melissa Maria (Rio de Janeiro, Pont. U. Catol.) ; Cunliffe, Samuel (Imperial Coll., London) ; Currie, Robert (Imperial Coll., London) ; D'Ambrosio, Carmelo (CERN) ; Dalseno, Jeremy (Bristol U.) ; David, Pascal (Paris U., VI-VII) ; David, Pieter (NIKHEF, Amsterdam) ; Davis, Adam (Cincinnati U.) ; De Bruyn, Kristof (NIKHEF, Amsterdam) ; De Capua, Stefano (Manchester U.) ; De Cian, Michel (Heidelberg U.) ; De Miranda, Jussara (Rio de Janeiro, CBPF) ; De Paula, Leandro (Rio de Janeiro Federal U.) ; De Silva, Weeraddana (Cincinnati U.) ; De Simone, Patrizia (Frascati) ; Dean, Cameron Thomas (Glasgow U.) ; Decamp, Daniel (Annecy, LAPP) ; Deckenhoff, Mirko (Tech. U., Dortmund (main)) ; Del Buono, Luigi (Paris U., VI-VII) ; Déléage, Nicolas (Annecy, LAPP) ; Derkach, Denis (Oxford U.) ; Deschamps, Olivier (Clermont-Ferrand U.) ; Dettori, Francesco (CERN) ; Dey, Biplab (Zurich U.) ; Di Canto, Angelo (CERN) ; Di Domenico, Antonio (INFN, Rome) ; Dijkstra, Hans (CERN) ; Donleavy, Stephanie (Liverpool U.) ; Dordei, Francesca (Heidelberg U.) ; Dorigo, Mirco (Ecole Polytechnique, Lausanne) ; Dosil Suárez, Alvaro (U. Santiago de Compostela (main)) ; Dossett, David (Warwick U.) ; Dovbnya, Anatoliy (Kharkov, KIPT) ; Dreimanis, Karlis (Liverpool U.) ; Dujany, Giulio (Manchester U.) ; Dupertuis, Frederic (Ecole Polytechnique, Lausanne) ; Durante, Paolo (CERN) ; Dzhelyadin, Rustem (Serpukhov, IHEP) ; Dziurda, Agnieszka (Cracow, INP) ; Dzyuba, Alexey (St. Petersburg, INP) ; Easo, Sajan (Rutherford ; CERN) ; Egede, Ulrik (Imperial Coll., London) ; Egorychev, Victor (Moscow, ITEP) ; Eidelman, Semen (Novosibirsk, IYF ; Novosibirsk State U.) ; Eisenhardt, Stephan (Edinburgh U.) ; Eitschberger, Ulrich (Tech. U., Dortmund (main)) ; Ekelhof, Robert (Tech. U., Dortmund (main)) ; Eklund, Lars (Glasgow U.) ; El Rifai, Ibrahim (Clermont-Ferrand U.) ; Elsasser, Christian (Zurich U.) ; Ely, Scott (Syracuse U.) ; Esen, Sevda (Heidelberg U.) ; Evans, Hannah Mary (Cambridge U.) ; Evans, Timothy (Oxford U.) ; Falabella, Antonio (INFN, Bologna) ; Färber, Christian (Heidelberg U.) ; Farinelli, Chiara (NIKHEF, Amsterdam) ; Farley, Nathanael (Birmingham U.) ; Farry, Stephen (Liverpool U.) ; Fay, Robert (Liverpool U.) ; Ferguson, Dianne (Edinburgh U.) ; Fernandez Albor, Victor (U. Santiago de Compostela (main)) ; Ferreira Rodrigues, Fernando (Rio de Janeiro, CBPF) ; Ferro-Luzzi, Massimiliano (CERN) ; Filippov, Sergey (Moscow, INR) ; Fiore, Marco (INFN, Ferrara ; Ferrara U.) ; Fiorini, Massimiliano (INFN, Ferrara ; Ferrara U.) ; Firlej, Miroslaw (AGH-UST, Cracow) ; Fitzpatrick, Conor (Ecole Polytechnique, Lausanne) ; Fiutowski, Tomasz (AGH-UST, Cracow) ; Fol, Philip (Imperial Coll., London) ; Fontana, Marianna (Heidelberg, Max Planck Inst.) ; Fontanelli, Flavio (INFN, Genoa ; Genoa U.) ; Forty, Roger (CERN) ; Francisco, Oscar (Rio de Janeiro Federal U.) ; Frank, Markus (CERN) ; Frei, Christoph (CERN) ; Frosini, Maddalena (INFN, Florence) ; Fu, Jinlin (INFN, Milan ; CERN) ; Furfaro, Emiliano (INFN, Rome2 ; Rome U., Tor Vergata) ; Gallas Torreira, Abraham (U. Santiago de Compostela (main)) ; Galli, Domenico (INFN, Bologna ; Bologna U.) ; Gallorini, Stefano (INFN, Padua ; CERN) ; Gambetta, Silvia (INFN, Genoa ; Genoa U.) ; Gandelman, Miriam (Rio de Janeiro Federal U.) ; Gandini, Paolo (Syracuse U.) ; Gao, Yuanning (Peking U., CHEP) ; García Pardiñas, Julián (U. Santiago de Compostela (main)) ; Garofoli, Justin (Syracuse U.) ; Garra Tico, Jordi (Cambridge U.) ; Garrido, Lluis (U. Barcelona (main)) ; Gascon, David (U. Barcelona (main)) ; Gaspar, Clara (CERN) ; Gastaldi, Ugo (INFN, Ferrara) ; Gauld, Rhorry (Oxford U.) ; Gavardi, Laura (Tech. U., Dortmund (main)) ; Gazzoni, Giulio (Clermont-Ferrand U.) ; Geraci, Angelo (INFN, Milan ; Milan Polytechnic) ; Gersabeck, Evelina (Heidelberg U.) ; Gersabeck, Marco (Manchester U.) ; Gershon, Timothy (Warwick U.) ; Ghez, Philippe (Annecy, LAPP) ; Gianelle, Alessio (INFN, Padua) ; Gianì, Sebastiana (Ecole Polytechnique, Lausanne) ; Gibson, Valerie (Cambridge U.) ; Giubega, Lavinia-Helena (Bucharest, IFIN-HH) ; Gligorov, V.V. (CERN) ; Göbel, Carla (Rio de Janeiro, Pont. U. Catol.) ; Golubkov, Dmitry (Moscow, ITEP) ; Golutvin, Andrey (Imperial Coll., London ; Moscow, ITEP ; CERN) ; Gomes, Alvaro (Rio de Janeiro, CBPF ; UFTM, Uberaba) ; Gotti, Claudio (INFN, Milan Bicocca ; Milan Bicocca U.) ; Grabalosa Gándara, Marc (Clermont-Ferrand U.) ; Graciani Diaz, Ricardo (U. Barcelona (main)) ; Granado Cardoso, Luis Alberto (CERN) ; Graugés, Eugeni (U. Barcelona (main)) ; Graverini, Elena (Zurich U.) ; Graziani, Giacomo (INFN, Florence) ; Grecu, Alexandru (Bucharest, IFIN-HH) ; Greening, Edward (Oxford U.) ; Gregson, Sam (Cambridge U.) ; Griffith, Peter (Birmingham U.) ; Grillo, Lucia (Heidelberg U.) ; Grünberg, Oliver (Rostock U.) ; Gui, Bin (Syracuse U.) ; Gushchin, Evgeny (Moscow, INR) ; Guz, Yury (Serpukhov, IHEP ; CERN) ; Gys, Thierry (CERN) ; Hadjivasiliou, Christos (Syracuse U.) ; Haefeli, Guido (Ecole Polytechnique, Lausanne) ; Haen, Christophe (CERN) ; Haines, Susan (Cambridge U.) ; Hall, Samuel (Imperial Coll., London) ; Hamilton, Brian (Maryland U., College Park) ; Hampson, Thomas (Bristol U.) ; Han, Xiaoxue (Heidelberg U.) ; Hansmann-Menzemer, Stephanie (Heidelberg U.) ; Harnew, Neville (Oxford U.) ; Harnew, Samuel (Bristol U.) ; Harrison, Jonathan (Manchester U.) ; He, Jibo (CERN) ; Head, Timothy (Ecole Polytechnique, Lausanne) ; Heijne, Veerle (NIKHEF, Amsterdam) ; Hennessy, Karol (Liverpool U.) ; Henrard, Pierre (Clermont-Ferrand U.) ; Henry, Louis (Paris U., VI-VII) ; Hernando Morata, Jose Angel (U. Santiago de Compostela (main)) ; van Herwijnen, Eric (CERN) ; Heß, Miriam (Rostock U.) ; Hicheur, Adlène (Rio de Janeiro Federal U.) ; Hill, Donal (Oxford U.) ; Hoballah, Mostafa (Clermont-Ferrand U.) ; Hombach, Christoph (Manchester U.) ; Hulsbergen, Wouter (NIKHEF, Amsterdam) ; Hussain, Nazim (Oxford U.) ; Hutchcroft, David (Liverpool U.) ; Hynds, Daniel (Glasgow U.) ; Idzik, Marek (AGH-UST, Cracow) ; Ilten, Philip (MIT) ; Jacobsson, Richard (CERN) ; Jaeger, Andreas (Heidelberg U.) ; Jalocha, Pawel (Oxford U.) ; Jans, Eddy (NIKHEF, Amsterdam) ; Jawahery, Abolhassan (Maryland U., College Park) ; Jing, Fanfan (Tsinghua U., Beijing) ; John, Malcolm (Oxford U.) ; Johnson, Daniel (CERN) ; Jones, Christopher (Cambridge U.) ; Joram, Christian (CERN) ; Jost, Beat (CERN) ; Jurik, Nathan (Syracuse U.) ; Kandybei, Sergii (Kharkov, KIPT) ; Kanso, Walaa (Marseille, CPPM) ; Karacson, Matthias (CERN) ; Karbach, Moritz (CERN) ; Karodia, Sarah (Glasgow U.) ; Kelsey, Matthew (Syracuse U.) ; Kenyon, Ian (Birmingham U.) ; Ketel, Tjeerd (NIKHEF, Amsterdam ; Vrije U., Amsterdam) ; Khanji, Basem (INFN, Milan Bicocca ; CERN ; Milan Bicocca U.) ; Khurewathanakul, Chitsanu (Ecole Polytechnique, Lausanne) ; Klaver, Suzanne (Manchester U.) ; Klimaszewski, Konrad (NCBJ, Swierk) ; Kochebina, Olga (Orsay, LAL) ; Kolpin, Michael (Heidelberg U.) ; Komarov, Ilya (Ecole Polytechnique, Lausanne) ; Koopman, Rose (NIKHEF, Amsterdam ; Vrije U., Amsterdam) ; Koppenburg, Patrick (NIKHEF, Amsterdam ; CERN) ; Korolev, Mikhail (SINP, Moscow) ; Kravchuk, Leonid (Moscow, INR) ; Kreplin, Katharina (Heidelberg U.) ; Kreps, Michal (Warwick U.) ; Krocker, Georg (Heidelberg U.) ; Krokovny, Pavel (Novosibirsk, IYF ; Novosibirsk State U.) ; Kruse, Florian (Tech. U., Dortmund (main)) ; Kucewicz, Wojciech (Cracow, INP ; AGH-UST, Cracow) ; Kucharczyk, Marcin (INFN, Milan Bicocca ; Cracow, INP ; Milan Bicocca U.) ; Kudryavtsev, Vasily (Novosibirsk, IYF ; Novosibirsk State U.) ; Kurek, Krzysztof (NCBJ, Swierk) ; Kvaratskheliya, Tengiz (Moscow, ITEP) ; La Thi, Viet Nga (Ecole Polytechnique, Lausanne) ; Lacarrere, Daniel (CERN) ; Lafferty, George (Manchester U.) ; Lai, Adriano (INFN, Cagliari) ; Lambert, Dean (Edinburgh U.) ; Lambert, Robert W (NIKHEF, Amsterdam ; Vrije U., Amsterdam) ; Lanfranchi, Gaia (Frascati) ; Langenbruch, Christoph (Warwick U.) ; Langhans, Benedikt (CERN) ; Latham, Thomas (Warwick U.) ; Lazzeroni, Cristina (Birmingham U.) ; Le Gac, Renaud (Marseille, CPPM) ; van Leerdam, Jeroen (NIKHEF, Amsterdam) ; Lees, Jean-Pierre (Annecy, LAPP) ; Lefèvre, Regis (Clermont-Ferrand U.) ; Leflat, Alexander (SINP, Moscow) ; Lefrançois, Jacques (Orsay, LAL) ; Leroy, Olivier (Marseille, CPPM) ; Lesiak, Tadeusz (Cracow, INP) ; Leverington, Blake (Heidelberg U.) ; Li, Yiming (Peking U., CHEP) ; Likhomanenko, Tatiana (Kurchatov Inst., Moscow) ; Liles, Myfanwy (Liverpool U.) ; Lindner, Rolf (CERN) ; Linn, Christian (CERN) ; Lionetto, Federica (Zurich U.) ; Liu, Bo (INFN, Cagliari) ; Lohn, Stefan (CERN) ; Longstaff, Iain (Glasgow U.) ; Lopes, Jose (Rio de Janeiro Federal U.) ; Lowdon, Peter (Zurich U.) ; Lucchesi, Donatella (INFN, Padua ; U. Padua (main)) ; Luo, Haofei (Edinburgh U.) ; Lupato, Anna (INFN, Padua) ; Luppi, Eleonora (INFN, Ferrara ; Ferrara U.) ; Lupton, Oliver (Oxford U.) ; Machefert, Frederic (Orsay, LAL) ; Machikhiliyan, Irina V (Moscow, ITEP) ; Maciuc, Florin (Bucharest, IFIN-HH) ; Maev, Oleg (St. Petersburg, INP) ; Malde, Sneha (Oxford U.) ; Malinin, Alexander (Kurchatov Inst., Moscow) ; Manca, Giulia (INFN, Cagliari ; Cagliari U.) ; Mancinelli, Giampiero (Marseille, CPPM) ; Mapelli, Alessandro (CERN) ; Maratas, Jan (Clermont-Ferrand U.) ; Marchand, Jean François (Annecy, LAPP) ; Marconi, Umberto (INFN, Bologna) ; Marin Benito, Carla (U. Barcelona (main)) ; Marino, Pietro (INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Märki, Raphael (Ecole Polytechnique, Lausanne) ; Marks, Jörg (Heidelberg U.) ; Martellotti, Giuseppe (INFN, Rome) ; Martinelli, Maurizio (Ecole Polytechnique, Lausanne) ; Martinez Santos, Diego (NIKHEF, Amsterdam ; Vrije U., Amsterdam) ; Martinez Vidal, Fernando (Valencia U., IFIC) ; Martins Tostes, Danielle (Rio de Janeiro Federal U.) ; Massafferri, André (Rio de Janeiro, CBPF) ; Matev, Rosen (CERN) ; Mathe, Zoltan (CERN) ; Matteuzzi, Clara (INFN, Milan Bicocca) ; Mazurov, Alexander (Birmingham U.) ; McCann, Michael (Imperial Coll., London) ; McCarthy, James (Birmingham U.) ; McNab, Andrew (Manchester U.) ; McNulty, Ronan (University Coll., Dublin) ; McSkelly, Ben (Liverpool U.) ; Meadows, Brian (Cincinnati U.) ; Meier, Frank (Tech. U., Dortmund (main)) ; Meissner, Marco (Heidelberg U.) ; Merk, Marcel (NIKHEF, Amsterdam) ; Milanes, Diego Alejandro (Colombia, U. Natl.) ; Minard, Marie-Noelle (Annecy, LAPP) ; Moggi, Niccolò (INFN, Bologna) ; Molina Rodriguez, Josue (Rio de Janeiro, Pont. U. Catol.) ; Monteil, Stephane (Clermont-Ferrand U.) ; Morandin, Mauro (INFN, Padua) ; Morawski, Piotr (AGH-UST, Cracow) ; Mordà, Alessandro (Marseille, CPPM) ; Morello, Michael Joseph (INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Moron, Jakub (AGH-UST, Cracow) ; Morris, Adam Benjamin (Edinburgh U.) ; Mountain, Raymond (Syracuse U.) ; Muheim, Franz (Edinburgh U.) ; Müller, Katharina (Zurich U.) ; Mussini, Manuel (INFN, Bologna) ; Muster, Bastien (Ecole Polytechnique, Lausanne) ; Naik, Paras (Bristol U.) ; Nakada, Tatsuya (Ecole Polytechnique, Lausanne) ; Nandakumar, Raja (Rutherford) ; Nasteva, Irina (Rio de Janeiro Federal U.) ; Needham, Matthew (Edinburgh U.) ; Neri, Nicola (INFN, Milan) ; Neubert, Sebastian (CERN) ; Neufeld, Niko (CERN) ; Neuner, Max (Heidelberg U.) ; Nguyen, Anh Duc (Ecole Polytechnique, Lausanne) ; Nguyen, Thi-Dung (Ecole Polytechnique, Lausanne) ; Nguyen-Mau, Chung (Ecole Polytechnique, Lausanne ; Hanoi U. of Sci.) ; Nicol, Michelle (Orsay, LAL) ; Niess, Valentin (Clermont-Ferrand U.) ; Niet, Ramon (Tech. U., Dortmund (main)) ; Nikitin, Nikolay (SINP, Moscow) ; Nikodem, Thomas (Heidelberg U.) ; Novoselov, Alexey (Serpukhov, IHEP) ; O'Hanlon, Daniel Patrick (Warwick U.) ; Oblakowska-Mucha, Agnieszka (AGH-UST, Cracow) ; Obraztsov, Vladimir (Serpukhov, IHEP) ; Ogilvy, Stephen (Glasgow U.) ; Okhrimenko, Oleksandr (Kiev, INR) ; Oldeman, Rudolf (INFN, Cagliari ; Cagliari U.) ; Onderwater, Gerco (U. Groningen, VSI) ; Orlandea, Marius (Bucharest, IFIN-HH) ; Osorio Rodrigues, Bruno (Rio de Janeiro, CBPF) ; Otalora Goicochea, Juan Martin (Rio de Janeiro Federal U.) ; Otto, Adam (CERN) ; Owen, Patrick (Imperial Coll., London) ; Oyanguren, Maria Arantza (Valencia U., IFIC) ; Pal, Bilas Kanti (Syracuse U.) ; Palano, Antimo (INFN, Bari ; Bari U.) ; Palombo, Fernando (INFN, Milan ; U. Milan (main)) ; Palutan, Matteo (Frascati) ; Panman, Jacob (CERN) ; Papanestis, Antonios (Rutherford ; CERN) ; Pappagallo, Marco (Glasgow U.) ; Pappalardo, Luciano (INFN, Ferrara ; Ferrara U.) ; Parkes, Christopher (Manchester U.) ; Parkinson, Christopher John (Tech. U., Dortmund (main) ; Birmingham U.) ; Passaleva, Giovanni (INFN, Florence) ; Patel, Girish (Liverpool U.) ; Patel, Mitesh (Imperial Coll., London) ; Patrignani, Claudia (INFN, Genoa ; Genoa U.) ; Pearce, Alex (Manchester U. ; Rutherford) ; Pellegrino, Antonio (NIKHEF, Amsterdam) ; Penso, Gianni (INFN, Rome ; U. Rome La Sapienza (main)) ; Pepe Altarelli, Monica (CERN) ; Perazzini, Stefano (INFN, Bologna ; Bologna U.) ; Perret, Pascal (Clermont-Ferrand U.) ; Pescatore, Luca (Birmingham U.) ; Pesen, Erhan (Celal Bayar U.) ; Petridis, Konstantin (Imperial Coll., London) ; Petrolini, Alessandro (INFN, Genoa ; Genoa U.) ; Picatoste Olloqui, Eduardo (U. Barcelona (main)) ; Pietrzyk, Boleslaw (Annecy, LAPP) ; Pilař, Tomas (Warwick U.) ; Pinci, Davide (INFN, Rome) ; Pistone, Alessandro (INFN, Genoa) ; Playfer, Stephen (Edinburgh U.) ; Plo Casasus, Maximo (U. Santiago de Compostela (main)) ; Polci, Francesco (Paris U., VI-VII) ; Poluektov, Anton (Warwick U. ; Novosibirsk, IYF ; Novosibirsk State U.) ; Polyakov, Ivan (Moscow, ITEP) ; Polycarpo, Erica (Rio de Janeiro Federal U.) ; Popov, Alexander (Serpukhov, IHEP) ; Popov, Dmitry (Heidelberg, Max Planck Inst.) ; Popovici, Bogdan (Bucharest, IFIN-HH) ; Potterat, Cédric (Rio de Janeiro Federal U.) ; Price, Eugenia (Bristol U.) ; Price, Joseph David (Liverpool U.) ; Prisciandaro, Jessica (Ecole Polytechnique, Lausanne) ; Pritchard, Adrian (Liverpool U.) ; Prouve, Claire (Bristol U.) ; Pugatch, Valery (Kiev, INR) ; Puig Navarro, Albert (Ecole Polytechnique, Lausanne) ; Punzi, Giovanni (INFN, Pisa ; U. Pisa (main)) ; Qian, Wenbin (Annecy, LAPP) ; Rachwal, Bartolomiej (Cracow, INP) ; Rademacker, Jonas (Bristol U.) ; Rakotomiaramanana, Barinjaka (Ecole Polytechnique, Lausanne) ; Rama, Matteo (INFN, Pisa) ; Rangel, Murilo (Rio de Janeiro Federal U.) ; Raniuk, Iurii (Kharkov, KIPT) ; Rauschmayr, Nathalie (CERN) ; Raven, Gerhard (NIKHEF, Amsterdam ; Vrije U., Amsterdam) ; Redi, Federico (Imperial Coll., London) ; Reichert, Stefanie (Manchester U.) ; Reid, Matthew (Warwick U.) ; dos Reis, Alberto (Rio de Janeiro, CBPF) ; Ricciardi, Stefania (Rutherford) ; Richards, Sophie (Bristol U.) ; Rihl, Mariana (CERN) ; Rinnert, Kurt (Liverpool U.) ; Rives Molina, Vincente (U. Barcelona (main)) ; Robbe, Patrick (Orsay, LAL) ; Rodrigues, Ana Barbara (Rio de Janeiro, CBPF) ; Rodrigues, Eduardo (Manchester U.) ; Rodriguez Perez, Pablo (Manchester U.) ; Roiser, Stefan (CERN) ; Romanovsky, Vladimir (Serpukhov, IHEP) ; Romero Vidal, Antonio (U. Santiago de Compostela (main)) ; Rotondo, Marcello (INFN, Padua) ; Rouvinet, Julien (Ecole Polytechnique, Lausanne) ; Ruf, Thomas (CERN) ; Ruiz, Hugo (U. Barcelona (main)) ; Ruiz Valls, Pablo (Valencia U., IFIC) ; Saborido Silva, Juan Jose (U. Santiago de Compostela (main)) ; Sagidova, Naylya (St. Petersburg, INP) ; Sail, Paul (Glasgow U.) ; Saitta, Biagio (INFN, Cagliari ; Cagliari U.) ; Salustino Guimaraes, Valdir (Rio de Janeiro Federal U.) ; Sanchez Mayordomo, Carlos (Valencia U., IFIC) ; Sanmartin Sedes, Brais (U. Santiago de Compostela (main)) ; Santacesaria, Roberta (INFN, Rome) ; Santamarina Rios, Cibran (U. Santiago de Compostela (main)) ; Santovetti, Emanuele (INFN, Rome2 ; Rome U., Tor Vergata) ; Sarti, Alessio (Frascati ; U. 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U., Dortmund (main)) ; Wislicki, Wojciech (NCBJ, Swierk) ; Witek, Mariusz (Cracow, INP) ; Wormser, Guy (Orsay, LAL) ; Wotton, Stephen (Cambridge U.) ; Wright, Simon (Cambridge U.) ; Wyllie, Kenneth (CERN) ; Xie, Yuehong (CCNU, Wuhan, Inst. Part. Phys.) ; Xing, Zhou (Syracuse U.) ; Xu, Zhirui (Ecole Polytechnique, Lausanne) ; Yang, Zhenwei (Peking U., CHEP) ; Yuan, Xuhao (Peking U., CHEP) ; Yushchenko, Oleg (Serpukhov, IHEP) ; Zangoli, Maria (INFN, Bologna) ; Zavertyaev, Mikhail (Heidelberg, Max Planck Inst. ; Lebedev Inst.) ; Zhang, Liming (Peking U., CHEP) ; Zhang, Wen Chao (University Coll., Dublin) ; Zhang, Yanxi (Peking U., CHEP) ; Zhelezov, Alexey (Heidelberg U.) ; Zhokhov, Anatoly (Moscow, ITEP) ; Zhong, Liang (Peking U., CHEP)

Publication 2015-04-09
Imprint 19 Dec 2014
Number of pages 10
Note Comments: Submitted to Phys. Lett. B
21 pages, 3 figures, 2 Tables
In: Phys. Lett. B 743 (2015) 46
DOI 10.1016/j.physletb.2015.02.010
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; LHCb
Free keywords flavor physics ; B physics ; branching fraction ; rare decay
Abstract A search for the rare decays $B_s^0 \to \pi^+\pi^-\mu^+\mu^-$ and $B^0 \to \pi^+\pi^-\mu^+\mu^-$ is performed in a data set corresponding to an integrated luminosity of 3.0 fb$^{-1}$ collected by the LHCb detector in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV. Decay candidates with pion pairs that have invariant mass in the range 0.5-1.3 GeV/$c^2$ and with muon pairs that do not originate from a resonance are considered. The first observation of the decay $B_s^0 \to \pi^+\pi^-\mu^+\mu^-$ and the first evidence of the decay $B^0 \to \pi^+\pi^-\mu^+\mu^-$ are obtained and the branching fractions are measured to be $\mathcal{B}(B_s^0 \to \pi^+\pi^-\mu^+\mu^-)=(8.6\pm 1.5\,({\rm stat}) \pm 0.7\,({\rm syst})\pm 0.7\,({\rm norm}))\times 10^{-8}$ and $\mathcal{B}(B^0 \to \pi^+\pi^-\mu^+\mu^-)=(2.11\pm 0.51\,({\rm stat}) \pm 0.15\,({\rm syst})\pm 0.16\,({\rm norm}) )\times 10^{-8}$, where the third uncertainty is due to the branching fraction of the decay $B^0\to J/\psi(\to \mu^+\mu^-)K^*(890)^0(\to K^+\pi^-)$, used as a normalisation.
Copyright/License publication: © 2015-2024 CERN (License: CC-BY-4.0), sponsored by SCOAP³
preprint: © 2014-2024 CERN (License: CC-BY-4.0)



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 ჩანაწერი შექმნილია 2014-12-22, ბოლოს შესწორებულია 2024-08-17


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