With a sample of approximately 89 x 10(6) B(-)B pairs collected with the BABAR detector, we perform a search for B meson decays into pairs of charmless vector mesons (phi, rho, and K*). We measure the branching fractions, determine the degree of longitudinal polarization, and search for CP violation asymmetries in the processes B+-->phiK(*+), B0-->phiK(*0), B+-->rho(0)K(*+), and B+-->rho(0)rho(+). We also set an upper limit on the branching fraction for the decay B0-->rho(0)rho(0).
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http://dx.doi.org/10.1103/PhysRevLett.91.171802 | DOI Listing |
Heliyon
February 2024
Optics-Laser Science and Technology Research Center, Malek Ashtar University of Technology, Isfahan, Iran.
In this article, Hard-Wall AdS/QCD with 5 flavors is used to study pseudoscalar, vector and axial-vector meson. The mass and decay constants of , , , , , , , , , and as well as strong couplings of , , , , , , , , , , , , and vertices are estimated in this study. A comparison of the results of the masses, decay constants, and strong couplings with existing predictions is also made.
View Article and Find Full Text PDFEur Phys J C Part Fields
December 2024
Phys Rev Lett
October 2024
School of Physics, Nankai University, Weijin Road 94, Tianjin 300071, China.
We determine for the first time the renormalization-group equation for the three-particle B-meson soft function dictating the nonperturbative strong interaction dynamics of the long-distance penguin contributions to the double radiative B-meson decays. The distinctive feature of the ultraviolet renormalization of this fundamental soft function consists in the pattern of mixing positive into negative support for an arbitrary initial condition. The exact solution to this integrodifferential evolution equation is then derived with the Laplace transform technique, allowing for the model-independent extraction of the asymptotic behavior at large and small partonic momenta.
View Article and Find Full Text PDFPhys Rev Lett
October 2024
Instituto de Física, Universidade de São Paulo, C.P. 66.318, 05315-970 São Paulo, Brazil.
In this Letter we show that pseudoscalar meson leptonic decay data can be used to set stringent limits on the mass m_{W_{R}} of a right-handed vector boson, such as the one that appears in left-right symmetric models. We have shown that for a heavy neutrino with a mass m_{N} in the range 50
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