RT Journal Article
T1 First observation of the decay Bs0 → φK∗0
A1 LHCb Collaboration, 
A1 Aaij, R.
A1 Adeva Andany, Bernardo
A1 Álvarez Cartelle, Paula
A1 Dosil Suárez, Álvaro
A1 Fernández Albor, Víctor
A1 Gallas Torreira, Abraham
A1 Hernando Morata, José Ángel
A1 Pazos Álvarez, Antonio
A1 Pérez Trigo, Eliseo
A1 Pló Casasús, Máximo
A1 Rodriguez Perez, P.
A1 Romero Vidal, Antonio
A1 Saborido Silva, Juan José
A1 Sanmartín Sedes, Brais
A1 Santamarina Ríos, Cibrán
A1 Seco, M.
A1 Vázquez Regueiro, Pablo
K1 B physics
K1 Flavour Changing Neutral Currents
K1 Flavor physics
K1 Hadron-Hadron Scattering
AB The first observation of the decay B0s → φK∗0 is reported. The analysis is based on a data sample corresponding to an integrated luminosity of 1.0 fb−1 of pp collisions at √s = 7 TeV, collected with the LHCb detector. A yield of 30 ± 6 B0s → (K+K−)(K−π+) decays is found in the mass windows 1012.5 < M(K+K−) < 1026.5 MeV/c2 and 746 < M(K−π+) < 1046 MeV/c2. The signal yield is found to be dominated by B0s → φK∗0 decays, and the corresponding branching fraction is measured to be B(B0s → φK∗0)= (1.10 ± 0.24 (stat) ± 0.14 (syst) ± 0.08 (fd/fs)) × 10−6, where the uncertainties are statistical, systematic and from the ratio of fragmentation fractions fd/fs which accounts for the different production rate of B0 and B0s mesons. The significance of B0s → φK∗0 signal is 6.1 standard deviations. The fraction of longitudinal polarization in B0s → φK∗0 decays is found to be f0 = 0.51 ± 0.15 (stat) ± 0.07 (syst)
PB Springer
YR 2013
FD 2013-11-12
LK https://hdl.handle.net/10347/45018
UL https://hdl.handle.net/10347/45018
LA eng
NO The LHCb collaboration., Aaij, R., Abellan Beteta, C. et al. First observation of the decay B0s → φK∗0 . J. High Energ. Phys. 2013, 92 (2013). https://doi.org/10.1007/JHEP11(2013)092
DS Minerva
RD 29 abr 2026