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    Adinolfi, Marco; Baesso, Clarissa; Belyaev, Ivan; Berezhnoy, Alexander; Bertolin, Alessandro; Bordyuzhin, Igor; Camboni, Alessandro; Carvalho Akiba, Kazuyoshi; Cassina, Lorenzo; Chatzikonstantinidis, Georgios; Chefdeville, Maximilien; Chobanova, Veronika; Cid Vidal, Xabier; Clemencic, Marco; Collins, Paula; Coquereau, Samuel; Currie, Robert; Dalseno, Jeremy; De Bruyn, Kristof; De Cian, Michel; De Serio, Marilisa; Ekelhof, Robert; Fazzini, Davide; Federici, Luca; Firlej, Miroslaw; Fiutowski, Tomasz; Fleuret, Frederic; Färber, Christian; Garrido, Lluis; Gavardi, Laura; Gersabeck, Marco; Gianì, Sebastiana; Gotti, Claudio; Graciani Diaz, Ricardo; Hicheur, Adlène; Huard, Zachary; Kandybei, Sergii; Kosmyntseva, Alena; Kozeiha, Mohamad; Kucewicz, Wojciech; Lai, Adriano; Latham, Thomas; Lemaitre, Florian; Leverington, Blake; Liu, Xuesong; Loh, David; Machefert, Frederic; Maciuc, Florin; Marchand, Jean François; Matteuzzi, Clara; McCann, Michael; Muheim, Franz; Needham, Matthew; Nguyen-Mau, Chung; Pappagallo, Marco; Penso, Gianni; Pinci, Davide; Plo Casasus, Maximo; Pugatch, Valery; Qian, Wenbin; Quintana, Boris; Rama, Matteo; Raven, Gerhard; Reboud, Meril; Ricciardi, Stefania; Rodriguez Lopez, Jairo Alexis; Sanchez Mayordomo, Carlos; Sanmartin Sedes, Brais; Satta, Alessia; Schiller, Manuel; Schopper, Andreas; Schune, Marie Helene; Sciascia, Barbara; Sergi, Antonino; Seyfert, Paul; Shekhtman, Lev; Shevchenko, Vladimir; Soares Lavra, Lais; Spradlin, Patrick; Stevens, Holger; Stracka, Simone; Sun, Liang; T'Jampens, Stephane; Tayduganov, Andrey; Tilley, Matthew James; Tourinho Jadallah Aoude, Rafael; Traill, Murdo; Usachov, Andrii; Vagnoni, Vincenzo; Vazquez Regueiro, Pablo; Vieira, Daniel; Vieites Diaz, Maria; De Vries, Jacco; Whitehead, Mark; Wicht, Jean; Williams, Mark Richard James; Wilson, Fergus; Wimberley, Jack; Yushchenko, Oleg; Zhukov, Valery

    2018
    Report

    Investigations of the existence of pentaquark states containing a single $b$ (anti)quark decaying weakly into four specific final states $J/ψK^+ π^- p, J/ψK^- π^- p, J/ψK^- π^+ p$, and J/ψϕ(1020)p are reported. The data sample corresponds to an integrated luminosity of 3.0 fb$^{-1}$ in 7 and 8 TeV pp collisions acquired with the LHCb detector. Signals are not observed and upper limits are set on the product of the production cross section times branching fraction with respect to that of the $Λ_b^0$.