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A Search for Dark Higgs Bosons
Recent astrophysical and terrestrial experiments have motivated the proposal
of a dark sector with GeV-scale gauge boson force carriers and new Higgs
bosons. We present a search for a dark Higgs boson using 516 fb-1 of data
collected with the BABAR detector. We do not observe a significant signal and
we set 90% confidence level upper limits on the product of the Standard
Model-dark sector mixing angle and the dark sector coupling constant.Comment: 7 pages, 5 postscript figures, published version with improved plots
for b/w printin
Women’s transit safety: making connections and defining future directions in research and practice
B0 meson decays to rho0 K*0, f0 K*0, and rho-K*+, including higher K* resonances
We present branching fraction measurements for the decays B0 -> rho0 K*0, B0
-> f0 K*0, and B0 -> rho- K*+, where K* is an S-wave (K pi)_0* or a K*(892)
meson; we also measure B0 -> f0 K_2*(1430)^0. For the K*(892) channels, we
report measurements of longitudinal polarization fractions (for rho final
states) and direct CP-violation asymmetries. These results are obtained from a
sample of (471.0 +/- 2.8) x 10^6 BBbar pairs collected with the BaBar detector
at the PEP-II asymmetric-energy e+ e- collider at the SLAC National Accelerator
Laboratory. We observe rho0 K*(892)^0, rho0 (K pi)_0^{*0}, f0 K*(892)^0, and
rho- K*(892)+ with greater than 5 sigma significance, including systematics. We
report first evidence for f0 (K pi)_0^{*0} and f0 K_2*(1430)^0, and place an
upper limit on rho- (K pi)_0^{*+}. Our results in the K*(892) channels are
consistent with no direct CP-violation.Comment: 17 pages, 6 postscript figures, submitted to Phys. Rev.
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