We present the results of the first combined dark matter search targeting the Galactic Centre using the ANTARES and IceCube neutrino telescopes. For dark matter particles with masses from 50 to 1000 ...GeV, the sensitivities on the self-annihilation cross section set by ANTARES and IceCube are comparable, making this mass range particularly interesting for a joint analysis. Dark matter self-annihilation through the \(\tau^+\tau^-\), \(\mu^+\mu^-\), \(b\bar{b}\) and \(W^+W^-\) channels is considered for both the Navarro-Frenk-White and Burkert halo profiles. In the combination of 2,101.6 days of ANTARES data and 1,007 days of IceCube data, no excess over the expected background is observed. Limits on the thermally-averaged dark matter annihilation cross section \(\langle\sigma_A\upsilon\rangle\) are set. These limits present an improvement of up to a factor of two in the studied dark matter mass range with respect to the individual limits published by both collaborations. When considering dark matter particles with a mass of 200 GeV annihilating through the \(\tau^+\tau^-\) channel, the value obtained for the limit is \(7.44 \times 10^{-24} \text{cm}^{3}\text{s}^{-1}\) for the Navarro-Frenk-White halo profile. For the purpose of this joint analysis, the model parameters and the likelihood are unified, providing a benchmark for forthcoming dark matter searches performed by neutrino telescopes.
Two-photon formation of the charmonium resonance $\chi_{{\rm c}2}$ has been studied with the L3 detector at LEP. The $\chi_{{\rm c}2}$ is identified through its decay $\chi_{{\rm c}2} \rightarrow ...\gamma {\rm J}$, with a subsequent decay ${\rm J} \rightarrow {\mathrm{e^+ e^-}}$ or ${\rm J} \rightarrow {\mathrm{\mu^+ \mu^-}}$. With an integrated luminosity of 140 pb$^{-1}$ at $\sqrt{s} \simeq$ 91~\textrm{Ge\kern -0.1em V} and 52 pb$^{-1}$ at $\sqrt{s} \simeq$ {Ge\kern -0.1em V}, we measure the two-photon width of the $\chi_{{\rm c}2}$ to be \begin{center} $\Gamma_{\gamma\gamma}(\chi_{{\rm c}2})=1.02 \pm 0.40 \mbox{$\;$(stat.)} \pm 0.15 \mbox{$\;$(sys.)} \pm 0.09(\rm{BR.}) {\mathrm{\ ke\kern -0.1em V}}$.
We search for anomalous $\ZZG$ and $\ZGG$ couplings with the L3 detector at LEP. The analysis is based on the study of the process $\EEZG$ at center-of-mass energies in the range $161 \GeV \rts 183 ...\GeV$. No evidence for anomalous effects is found. Limits at the 95\% confidence level are set on the values of the eight possible anomalous couplings. Depending on the type of coupling new physics scales below 213 GeV to 1083 GeV are excluded.
UltraSPARC-III: a 3rd generation 64 b SPARC microprocessor Lauterbach, G.; Greenley, D.; Ahmed, S. ...
2000 IEEE International Solid-State Circuits Conference. Digest of Technical Papers (Cat. No.00CH37056),
2000
Conference Proceeding
UltraSPARC-III (US-III) is a 64 b 800 MHz 4-instruction-issue superscalar microprocessor for high-performance desktop workstation, work group server, and enterprise server platforms. On-chip caches ...include a 64 kB 4-way associative for data, 32 kB 4-way associative for instructions, a 2 k B 4-way associative data prefetch cache, and a 2 kB 4-way associative write. A 90 kB on-chip tag array supports the off-chip 8 MB unified second-level cache. The 23 M-transistor chip in a 0.15 /spl mu/m, 7-layer metal process consumes 60 W from a 1.5 V supply.
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