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

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.

The Case On Assessment Of Spilled Oil With Mixed Free Product In Seoul

The purpose of this study is to assess sources of contamination by analyzing the free product and oil compounds in groundwater near the Subway Station, located adjacent to the Yongsan Garrison in Seoul, Republic of Korea. All of the samples collected twice were groundwater and free product in a monitoring well. Analysis items are TPH fingerprinting, pristine/phytane ratio, alkylbenzene pattern, PAH&alkyl PAH, antioxidant, icing inhibitor, PIANO, element(C, N, H), and sulfur. Using ratio of pristine/phytane, we were able to distinguished fuel type between kerosene and JP-8 samples, which was impossible by GC/FID pattern. Alkyl benzene pattern was very effective in distinguishing between JP-8 and kerosene. It is very important that 2,4-dimethyl-6-tert-butyl phenol, an antioxidant used only for JP-8, was detected in free product samples. The concentration of sulfur in kerosene fuel is much lower than that of JP-8, and the total contents of sulfur in environmental samples can be used to differentiate the fuel type of spilled oil between kerosene and JP-8. In conclusion, according to the result of a variety of analytical methods to find the source of spilled fuel, it had been found that the fuel type detected in the tunnel of subway station and monitoring wells outside of Yongsan Garrison and the monitoring wells inside of Yongsan Garrison are the same

Search for CP violation in the decay τ^{-}→π^{-}K_{s}^{0}(≥Oπ^{0})ν_{τ}

We report a search for CP violation in the decay τ-→π-KS0(≥0π0)ντ using a data set of 437×106 τ-lepton pairs, corresponding to an integrated luminosity of 476  fb-1, collected with the BABAR detector at the PEP-II asymmetric-energy e+e- storage rings. The CP-violating decay-rate asymmetry is determined to be (-0.36±0.23±0.11)% approximately 2.8 standard deviations from the standard model prediction of (0.36±0.01)%

B0 meson decays to ρ0K∗0, f0K∗0, and ρ−K∗+, including higher K∗ resonances

We present branching fraction measurements for the decays B0→ρ0K*0, B0→f0K*0, and B0→ρ-K*+, where K* is an S-wave (Kπ)0* or a K*(892) meson; we also measure B0→f0K2*(1430)0. For the K*(892) channels, we report measurements of longitudinal polarization fractions (for ρ final states) and direct CP violation asymmetries. These results are obtained from a sample of (471.0±2.8)×106 BB̅ pairs collected with the BABAR detector at the PEP-II asymmetric-energy e+e- collider at the SLAC National Accelerator Laboratory. We observe ρ0K*(892)0, ρ0(Kπ)0*0, f0K*(892)0, and ρ-K*(892)+ with greater than 5σ significance, including systematics. We report first evidence for f0(Kπ)0*0 and f0K2*(1430)0, and place an upper limit on ρ-(Kπ)0*+. Our results in the K*(892) channels are consistent with no direct CP violation

Amplitude analysis of B^{0}→K^{+}π^{-}π^{0} and evidence of direct CP violation in B→K*π decays

We analyze the decay B(0) -> K(+) pi(-) pi(0) with a sample of 4.54 x 10(8) B (B) over bar events collected by the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC, and extract the complex amplitudes of seven interfering resonances over the Dalitz plot. These results are combined with amplitudes measured in B(0) -> K(S)(0)pi(+)pi(-) decays to construct isospin amplitudes from B(0) -> K* pi and B(0) -> rho K decays. We measure the phase of the isospin amplitude Phi(3/2), useful in constraining the Cabibbo-Kobayashi-Maskawa unitarity triangle angle gamma and evaluate a CP rate asymmetry sum rule sensitive to the presence of new physics operators. We measure direct CP violation in B(0) -> K*(+) pi(-) decays at the level of 3 sigma when measurements from both B(0) -> K(+) pi(-) pi(0) and B(0) -> K(S)(0) pi(+) pi(-) decays are combined

Measurement of W+W- production and search for the Higgs boson in pp collisions at root s=7 TeV

A measurement of W+W- production in pp collisions at root s = 7 TeV and a search for the Higgs boson are reported. The W+W- candidates are selected in events with two leptons, either electrons or muons. The measurement is performed using LHC data recorded with the CMS detector, corresponding to an integrated luminosity of 36 pb(-1). The pp -> W+W- cross section is measured to be 41.1 +/- 15.3 (stat) +/- 5.8 (syst) +/- 4.5 (lumi) ph. consistent with the standard model prediction. Limits on WW gamma and WWZ anomalous triple gauge couplings are set. The search for the standard model Higgs boson in the W+W- decay mode does not reveal any evidence of excess above backgrounds. Limits are set on the production of the Higgs boson in the context of the standard model and in the presence of a sequential fourth family of fermions with high masses. In the latter context, a Higgs boson with mass between 144 and 207 GeV/c(2) is ruled out at 95% confidence level. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved