Centrality evolution of the charged-particle pseudorapidity density over a broad pseudorapidity range in Pb-Pb collisions at root s(NN)=2.76TeV

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The AOST miniature Fourier spectrometer for space studies

International audienceThe AOST Fourier spectrometer being developed for the Phobos-Soil project is intended for remote probing in the 2.5-25-μm region. This spectral region includes not only reflected and transmitted solar radiation, but also the intrinsic thermal radiation of the celestial body being studied. The maximum spectral resolution, taking into account apodization, is 0.9cm-1, and the field-of-view angle is 2.5°. The device has its own thermal-stabilization and two-axis guidance systems, as well as an absolute-blackbody simulator for calibration. The time to record one interferogram ranges from 5to50sec. The mass of the device is 4kg, and its power requirement is as much as 10

Where Brain, Body and World Collide

The production cross section of electrons from semileptonic decays of beauty hadrons was measured at mid-rapidity (|y| < 0.8) in the transverse momentum range 1 < pt < 8 Gev/c with the ALICE experiment at the CERN LHC in pp collisions at a center of mass energy sqrt{s} = 7 TeV using an integrated luminosity of 2.2 nb^{-1}. Electrons from beauty hadron decays were selected based on the displacement of the decay vertex from the collision vertex. A perturbative QCD calculation agrees with the measurement within uncertainties. The data were extrapolated to the full phase space to determine the total cross section for the production of beauty quark-antiquark pairs