Hadron Spectroscopy with COMPASS at CERN

The aim of the COMPASS hadron programme is to study the light-quark hadron spectrum, and in particular, to search for evidence of hybrids and glueballs. COMPASS is a fixed-target experiment at the CERN SPS and features a two-stage spectrometer with high momentum resolution, large acceptance, particle identification and calorimetry. A short pilot run in 2004 resulted in the observation of a spin-exotic state with $J^{PC} = 1^{-+}$ consistent with the debated $\pi1(1600)$. In addition, Coulomb production at low momentum transfer data provide a test of Chiral Perturbation Theory. During 2008 and 2009, a world leading data set was collected with hadron beam which is currently being analysed. The large statistics allows for a thorough decomposition of the data into partial waves. The COMPASS hadron data span over a broad range of channels and shed light on several different aspects of QCD.Comment: 4 pages, 5 figure

Progress in QCD Using Lattice Gauge Theory

Review of results from lattice QCD of relevance to standard-model phenomenology, to appear in Annual Review of Nuclear and Particle Science. KEY WORDS: hadron masses, quark mixing (CKM) matrix, weak matrix elements, strong coupling constant.Comment: 41 pages LaTeX, FERMILAB-PUB-93/058-T. Figures and style file are uuencoded and appended. Figures embedded with epsf.sty, available from the serve

A Novel Planar Fractal Antenna with CPW-Feed for Multiband applications

In this paper, a multiband antenna using a novel fractal design is presented. The antenna structure is formed by inscribing a hexagonal slot within a circle. This base structure is then scaled and arranged within the hexagon along its sides without touching the outer structure. The proposed CPW fed, low profile antenna offers good performance in the 1.65-2.59 GHz, 4.16-4.52 GHz and 5.54-6.42 GHz bands and is suitable for GSM 1800/1900, Bluetooth, IMT advanced system and upper WLAN applications. The antenna has been fabricated on a substrate of height 1.6mm and er=4.4 and simulation and experimental results are found to be in good agreement