%0 Journal Article
%T Study of B-s(0) -> J/psi pi(+)pi-K+K- decays
%A LHCb Collaboration (Aaij, R. et al
%A Henry, L.
%A Jashal, B. K.
%A Martinez-Vidal, F.
%A Oyanguren, A.
%A Remon Alepuz, C.
%A Ruiz Vidal, J.
%J Journal of High Energy Physics
%D 2021
%V 02
%N 2
%I Springer
%@ 1029-8479
%G English
%F LHCbCollaborationAaij_etal2021
%O WOS:000614815700001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4731), last updated on Mon, 15 Mar 2021 08:34:02 +0000
%X The decays B-s(0) -> J/psi pi(+)pi-K+K- are studied using a data set corresponding to an integrated luminosity of 9 fb(-1), collected with the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13TeV. The decays B-s(0) -> J/psi K*(K) over bar *0 and B-s(0) -> chi(c1)(3872)K+K-, where the K+K- pair does not originate from a phi meson, are observed for the first time. Precise measurements of the ratios of branching fractions between intermediate chi(c1)(3872)phi, J/psi K*0 (K) over bar *0, psi(2S)phi and chi(c1)(3872)K+K- states are reported. A structure, denoted as X(4740), is observed in the J/psi phi mass spectrum and, assuming a Breit-Wigner parameterisation, its mass and width are determined to be m(X(4740)) = 4741 +/- 6 +/- 6 MeV/c(2), Gamma(X(4740)) = 53 +/- 15 +/- 11MeV, where the first uncertainty is statistical and the second is systematic. In addition, the most precise single measurement of the mass of the B-s(0) meson is performed and gives a value of m(Bs)(0) = 5366.98 +/- 0.07 +/- 0.13MeV/c(2).
%K B physics
%K Branching fraction
%K Hadron-Hadron scattering (experiments)
%K Quarkonium
%K Spectroscopy
%R 10.1007/JHEP02(2021)024
%U https://arxiv.org/abs/2011.01867
%U https://doi.org/10.1007/JHEP02(2021)024
%P 024-34pp