1,721,310 research outputs found
Measurement of the Strange Quark Forward-Backward Asymmetry at the Z^0 pole
No full textA measurement of the strange quark forward-backward asymmetry at the Z pole has been performed by the DELPHI Collaboration at LEP. The sbars asymmetry has been measured from the asymmetry of fast charged kaons identified using Ring Imaging CHerenkov (RICH) detectors. The kaon production asymmetry, measured in the momentum range from 10 to 18 GeV/c, has been found to be A_FB(K) = 0.044 ± 0.005 (stat.) ± 0.004 (sys.). From this value the strange quark asymmetry has been measured: A_FB(s) = 0.111 ± 0.019 (stat.) ± 0.020 (sys.). This result updates the previous measurements published by DELPHI. An analysis based on the asymmetry of high momentum Λ's has also been performed, providing a consistent value for the sbars asymmetry
The MAGIC telescopes: performance, results and future perspectives
No full textMAGIC (Major Atmospheric Gamma–ray Imaging Cherenkov) is a two 17 meter diameter telescope system, located at the Roque de los Muchachos Observatory in the Canarian island La Palma (Spain) at a height of 2240 m.a.s.l., operating in stereoscopic mode since fall 2009. We report on the performance of the instrument and highlight selected recent results from observations. The future perspectives are also illustrated
MAGIC observations of distant AGN and their implications.
No full textThe Major Atmospheric Gamma Imaging Cherenkov (MAGIC) telescopes are two 17 m diameter Cherenkov telescopes located on the Canarian island La Palma (Spain). MAGIC is nowadays the only ground-based instrument able to detect high-energy gamma-rays below 100 GeV. Its physics program spans from astrophysics to fundamental physics.
In this talk I will focus on the latest MAGIC results related to distant AGN observations and on implications related to Extragalactic Background Light and possible new physics
- …
