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Alexander, M; Alkhazov, G; Aslanides, E; Baesso, C; Baker, S; Battista, V; Ben-Haim, E; Bertolin, A; Bettler, M-O; Bezshyiko, Ia; Blanc, F; Blouw, J; Bondar, A; Cadeddu, S; Carvalho Akiba, K; Charles, M; Contu, A; Couturier, B; De Cian, M; De Simone, P; Dendek, A; Dettori, F; Dey, B; Ekelhof, R; Eklund, L; Evans, T; Farley, N; Ferro-Luzzi, M; Forshaw, D C; Franco Lima, V; García Pardiñas, J; Gibson, V; Hadavizadeh, T; Henrard, P; Hushchyn, M; Jawahery, A; Jiang, F; Johnson, D; Jurik, N; Karacson, M; Karodia, S; Kelsey, M; Khanji, B; Klimaszewski, K; Kravchuk, L; Kreps, M; Kruse, F; Kuonen, A K; Lanfranchi, G; Latham, T; Lefèvre, R; Li, T; Loh, D; Lyu, X; Marin Benito, C; Martellotti, G; Massacrier, L M; Massafferri, A; Maurin, B; Meier, F; Mitzel, D S; Mulder, M; Nakada, T; Needham, M; Niet, R; Nogay, A; Pappalardo, L L; Popovici, B; Pritchard, A; Qian, W; Rama, M; Richards, S; Rogozhnikov, A; Schlupp, M; Semennikov, A; Sergi, A; Serrano, J; Seyfert, P; Shapkin, M; Sirendi, M; Smith, E; Smith, I T; Stemmle, S; Sutcliffe, W; Tobin, M; Toriello, F; Traill, M; Ukleja, A; Valenti, G; Vazquez Gomez, R; Vieira, D; Voß, C; Walsh, J; Wicht, J; Wilkinson, G; Williams, M P; Wormser, G; Xu, Z; Zarebski, K A; Zavertyaev, M
The European physical journal. C, Particles and fields, 2017, Letnik: 77, Številka: 3Journal Article
A measurement of the phase difference between the short- and long-distance contributions to the Formula: see text decay is performed by analysing the dimuon mass distribution. The analysis is based on collision data corresponding to an integrated luminosity of 3Formula: see text collected by the LHCb experiment in 2011 and 2012. The long-distance contribution to the Formula: see text decay is modelled as a sum of relativistic Breit-Wigner amplitudes representing different vector meson resonances decaying to muon pairs, each with their own magnitude and phase. The measured phases of the Formula: see text and Formula: see text resonances are such that the interference with the short-distance component in dimuon mass regions far from their pole masses is small. In addition, constraints are placed on the Wilson coefficients, Formula: see text and Formula: see text, and the branching fraction of the short-distance component is measured.
