%0 Journal Article
%T Determination of the Ratio of b-Quark Fragmentation Fractions f(s)/f(d) in pp Collisions at root s=7 TeV with the ATLAS Detector
%A ATLAS Collaboration (Aad, G. et al
%A Alvarez Piqueras, D.
%A Cabrera Urban, S.
%A Castillo Gimenez, V.
%A Costa, M. J.
%A Fernandez Martinez, P.
%A Ferrer, A.
%A Fiorini, L.
%A Fuster, J.
%A Garcia, C.
%A Garcia Navarro, J. E.
%A Gonzalez de la Hoz, S.
%A Hernandez Jimenez, Y.
%A Higon-Rodriguez, E.
%A Irles Quiles, A.
%A Jimenez Pena, J.
%A Kaci, M.
%A King, M.
%A Lacasta, C.
%A Lacuesta, V. R.
%A Marti-Garcia, S.
%A Mitsou, V. A.
%A Oliver Garcia, E.
%A Pedraza Lopez, S.
%A Perez Garcia-Estañ, M. T.
%A Romero Adam, E.
%A Ros, E.
%A Salt, J.
%A Sanchez Martinez, V.
%A Soldevila, U.
%A Sanchez, J.
%A Valero, A.
%A Valladolid Gallego, E.
%A Valls Ferrer, J. A.
%A Vos, M.
%J Physical Review Letters
%D 2015
%V 115
%N 26
%I Amer Physical Soc
%@ 0031-9007
%G English
%F ATLASCollaborationAad_etal2015
%O WOS:000367385200005
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2511), last updated on Thu, 21 Jan 2016 11:46:15 +0000
%X With an integrated luminosity of 2.47 fb(-1) recorded by the ATLAS experiment at the LHC, the exclusive decays B-s(0) -> J/psi phi and B-d(0) -> J/psi K*(0) of B mesons produced in pp collisions at root s = 7 TeV are used to determine the ratio of fragmentation fractions f(s)/f(d). From the observed B-s(0) -> J/psi phi and B-d(0) -> J/psi K*(0) yields, the quantity (f(s)/f(d))[B(B-s(0) -> J/psi phi)/B(B-d(0) -> J/psi K*(0) )] is measured to be 0.199 +/- 0.004(stat) +/- 0.008(syst). Using a recent theory prediction for [B(B-s(0) -> J/psi phi)/B(B-d(0) -> J/psi K*(0))] yields (f(s)/f(d)) = 0.240 +/- 0.004(stat) +/- 0.010(syst) +/- 0.017(th). This result is based on a new approach that provides a significant improvement of the world average.
%R 10.1103/PhysRevLett.115.262001
%U http://arxiv.org/abs/1507.08925
%U https://doi.org/10.1103/PhysRevLett.115.262001
%P 262001 - 18pp