E-viri
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Adinolfi, Marco; Ajaltouni, Ziad; Alvarez Cartelle, Paula; Andreotti, Mirco; Atzeni, Michele; Balagura, Vladislav; Barlow, Roger; Batozskaya, Varvara; Belin, Samuel; Betancourt, Christopher; Bezshyiko, Iaroslava; Birnkraut, Alex; Bizzeti, Andrea; Bobulska, Dana; Borghi, Silvia; Brundu, Davide; Chamont, David; Charpentier, Philippe; Chrzaszcz, Marcin; Cliff, Harry; Crocombe, Andrew; D'Ambrosio, Carmelo; Decamp, Daniel; Derkach, Denis; Deschamps, Olivier; Douglas, Lauren; Dujany, Giulio; Egede, Ulrik; Eidelman, Semen; Escher, Stephan; Ferreira Lopes, Lino; Filippov, Sergey; Fini, Rosa Anna; Gabriel, Emmy; Gan, Yuyue; Gersabeck, Marco; Grabowski, Jascha Peter; Greim, Roman; Hasse, Christoph; Hatch, Mark; Hicheur, Adlène; Hynds, Daniel; Jacobsson, Richard; Jawahery, Abolhassan; Kim, Kyung Eun; Kirn, Thomas; Klaver, Suzanne; Krokovny, Pavel; Lazzeroni, Cristina; Leflat, Alexander; Lefrançois, Jacques; Mackowiak, Patrick; Marino, Pietro; Mathe, Zoltan; McNab, Andrew; McNulty, Ronan; Mead, James Vincent; Meinert, Nis; Moron, Jakub; Müller, Vanessa; Naik, Paras; Neufeld, Niko; Nikitin, Nikolay; Pais, Preema Rennee; Pastore, Alessandra; Perazzini, Stefano; Pietrzyk, Boleslaw; Polci, Francesco; Polycarpo, Erica; Popov, Alexander; Prisciandaro, Jessica; Rachwal, Bartlomiej; Rademacker, Jonas; Remon Alepuz, Clara; Ricciardi, Stefania; Rodrigues, Eduardo; Roiser, Stefan; Romanovskiy, Vladimir; Ruiz Vidal, Joan; Schneider, Olivier; Spaan, Bernhard; Teubert, Frederic; Tilley, Matthew James; Usachov, Andrii; Venkateswaran, Aravindhan; Verlage, Tobias Anton; Vesterinen, Mika; Vieira, Daniel; Vieites Diaz, Maria; Vitti, Marcela; Wang, Zhenzi; Websdale, David; Whitehead, Mark; Williams, Ifan; Witek, Mariusz; Xu, Ao; Xu, Zhirui; Yang, Zishuo; Yuan, Xuhao; Zhang, Dongliang
2018Report
The ϒ(1S)μ$^{+}$μ$^{−}$ invariant-mass distribution is investigated for a possible exotic meson state composed of two b quarks and two $ \overline{b} $ quarks, $ {X}_{b\overline{b}b\overline{b}} $ . The analysis is based on a data sample of pp collisions recorded with the LHCb detector at centre-of-mass energies $ \sqrt{s}=7 $ , 8 and 13 TeV, corresponding to an integrated luminosity of 6.3 fb$^{−1}$. No significant excess is found, and upper limits are set on the product of the production cross-section and the branching fraction as functions of the mass of the $ {X}_{b\overline{b}b\overline{b}} $ state. The limits are set in the fiducial volume where all muons have pseudorapidity in the range 2.0, 5.0, and the $ {X}_{b\overline{b}b\overline{b}} $ state has rapidity in the range 2.0, 4.5 and transverse momentum less than 15 GeV/c.
