In this article we discuss the possibility of using the observations by GLAST of standard gamma sources, as the Crab Nebula, to calibrate imaging air Cherenkov detectors, MAGIC in particular, and ...optimise their energy resolution. We show that at around 100
GeV the absolute energy calibration uncertainty of Cherenkov telescopes can be reduced to ≲10% by means of such cross-calibration procedure.
Here, a search for the exotic meson X(5568) decaying into the B$0\atop{s}$π± final state is performed using data corresponding to 9.6 fb-1 from $p\bar{p}$ collisions at $\sqrt{s}$ = 1960 GeV recorded ...by the Collider Detector at Fermilab. No evidence for this state is found and an upper limit of 6.7% at the 95% confidence level is set on the fraction of B$0\atop{s}$ produced through the X(5568)→B$0\atop{s}$π± process.
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