6 research outputs found

    The Physics of the B Factories

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    Higgs Boson Studies at the Tevatron

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    We combine searches by the CDF and D0 Collaborations for the standard model Higgs boson with mass in the range 90--200 GeV/c2/c^2 produced in the gluon-gluon fusion, WHWH, ZHZH, ttˉHt{\bar{t}}H, and vector boson fusion processes, and decaying in the HbbˉH\rightarrow b{\bar{b}}, HW+WH\rightarrow W^+W^-, HZZH\rightarrow ZZ, Hτ+τH\rightarrow\tau^+\tau^-, and HγγH\rightarrow \gamma\gamma modes. The data correspond to integrated luminosities of up to 10 fb1^{-1} and were collected at the Fermilab Tevatron in ppˉp{\bar{p}} collisions at s=1.96\sqrt{s}=1.96 TeV. The searches are also interpreted in the context of fermiophobic and fourth generation models. We observe a significant excess of events in the mass range between 115 and 140 GeV/c2c^2. The local significance corresponds to 3.0 standard deviations at mH=125m_H=125 GeV/c2c^2, consistent with the mass of the Higgs boson observed at the LHC, and we expect a local significance of 1.9 standard deviations. We separately combine searches for HbbˉH \to b\bar{b}, HW+WH \to W^+W^-, Hτ+τH\rightarrow\tau^+\tau^-, and HγγH\rightarrow\gamma\gamma. The observed signal strengths in all channels are consistent with the presence of a standard model Higgs boson with a mass of 125 GeV/c2c^2

    The BaBar detector: Upgrades, operation and performance

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    Contains fulltext : 121729.pdf (preprint version ) (Open Access

    Erratum: Measurement of the absolute branching fractions for D-S(-) -> l(-)(nu)over-bar(l) and extraction of the decay constant f(Ds) (vol 82, 091103, 2010)

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    Evidence for a Particle Produced in Association with Weak Bosons and Decaying to a Bottom-Antibottom Quark Pair in Higgs Boson Searches at the Tevatron

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    We combine searches by the CDF and D0 Collaborations for the associated production of a Higgs boson with a W or Z boson and subsequent decay of the Higgs boson to a bottom-antibottom quark pair. The data, originating from Fermilab Tevatron p[bar over p] collisions at √s=1.96  TeV, correspond to integrated luminosities of up to 9.7  fb[superscript -1]. The searches are conducted for a Higgs boson with mass in the range 100–150  GeV/c[superscript 2]. We observe an excess of events in the data compared with the background predictions, which is most significant in the mass range between 120 and 135  GeV/c[superscript 2]. The largest local significance is 3.3 standard deviations, corresponding to a global significance of 3.1 standard deviations. We interpret this as evidence for the presence of a new particle consistent with the standard model Higgs boson, which is produced in association with a weak vector boson and decays to a bottom-antibottom quark pair
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