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  • Precise measurements of the properties of the B_1(5721)^(0,+) and B_2(5747)^(0,+) states and observation of B^(+,0) pi^(-,+) mass structures
    collaboration, LHCb; Alves, A A; Andreotti, M; Andrews, J E; Baesso, C; Barsuk, S; Belogurov, S; Blake, T; Borsato, M; Buytaert, J; Calabrese, R; Cardini, A; Casse, G; Cattaneo, M; Charpentier, Ph; Closier, J; Coco, V; Cogneras, E; Collazuol, G; Contu, A; Cowan, G A; David, P N Y; De Bruyn, K; De Silva, W; Evans, T; Fiorini, M; Fitzpatrick, C; Fiutowski, T; Francisco, O; Frei, C; A Gallas Torreira; J Garra Tico; Giubega, L; Yu Guz; Hansmann-Menzemer, S; Harrison, J; Hernando Morata, J A; Hombach, C; Hutchcroft, D; Hynds, D; Jaeger, A; Jawahery, A; Johnson, D; Karbach, T M; Kreplin, K; Likhomanenko, T; Liu, B; Lopes, J H; Lucchesi, D; Malde, S; Malinin, A; Maratas, J; Marconi, U; C Marin Benito; Massafferri, A; Mathe, Z; Matteuzzi, C; McCann, M; McSkelly, B; Monteil, S; Moron, J; Neuner, M; Panman, J; Parkes, C; Parkinson, C J; Passaleva, G; Pesen, E; Olloqui, E Picatoste; Pilař, T; Price, E; Prisciandaro, J; Rachwal, B; Raven, G; Rodrigues, A B; Rouvinet, J; Ruf, T; C Santamarina Rios; Satriano, C; Sciubba, A; Sepp, I; Smith, M; Sridharan, S; Stevenson, S; Stracka, S; Straumann, U; Szczekowski, M; Szumlak, T; T'Jampens, S; Tisserand, V; Todd, J; Tonelli, D; Tsaregorodtsev, A; M Ubeda Garcia; Ustyuzhanin, A; P Vazquez Regueiro; Vollhardt, A; Vorobyev, A; Wang, J; Wilkinson, M; Wimberley, J

    arXiv.org, 05/2015
    Paper, Journal Article

    Invariant mass distributions of B+pi- and B0pi+ combinations are investigated in order to study excited B mesons. The analysis is based on a data sample corresponding to 3.0 fb-1 of pp collision data, recorded by the LHCb detector at centre-of-mass energies of 7 and 8 TeV. Precise measurements of the masses and widths of the B_1(5721)^(0,+) and B_2*(5747)^(0,+) states are reported. Clear enhancements, particularly prominent at high pion transverse momentum, are seen over background in the mass range 5850--6000 MeV in both B+pi- and B0pi+ combinations. The structures are consistent with the presence of four excited B mesons, labelled B_J(5840)^(0,+) and B_J(5960)^(0,+), whose masses and widths are obtained under different hypotheses for their quantum numbers.

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