A preliminary combination of Standard Model Higgs searches with the ATLAS experiment, in a dataset collected at energy √ s = 7 TeV at the LHC in year 2011, is presented.1 The Higgs boson mass ranges from 112.7 GeV to 115.5 GeV, 131 GeV to 237 GeV and 251 GeV to 468 GeV are excluded at the 95 % confidence level. An excess of events is observed for a Higgs boson mass hypothesis close to 126 GeV. ...

Recent experimental tests of QED in high energy e+ecollisions, scans for narrow resonances, recent results in hadron production below 1.4 GeV centerof-mass energy, general properties of hadron production in the center-of-mass energy range 2.5 GeV to 7.4 GeV, and new results in the 4 GeV center-of-mass energy region are reviewed.

The scalar top discovery potential has been studied for the TESLA project with a full-statistics background simulation at √ s = 500 GeV and L = 500 fb−1. The beam polarization is very important to measure the scalar top mixing angle and to determine its mass. The latest estimation of the beam polarization parameters is applied. This study includes e polarization, which improves the sensitivity....

Results on hadronic final states in e'e' annihilation are reported. The data were collected with t he MARK II detector at the PEP storage ring at the Stanford Linear Accelerator Center, operating at a center-of-mass energy of ds=29 GeV The MARK II detector, a 4.5 KG solenoid with cylindrical drift chambers, surrounded by a liquid argon calorimeter, has events are selected by least 5 charged pat...

We present measurements of the transverse momentum spectra for K 0 S , Λ , Ξ − and their antiparticles in p+p collisions at √ s = 200 GeV. The extracted mid-rapidity yields and pT are in agreement with previous p + ¯ p experiments while they have smaller statistical errors. We compare the measured particle spectra and pT values to predictions from the PYTHIA leading order pQCD model (v6.221) an...

The EGRET instrument on the Compton Gamma Ray Observatory (1991-2000) has positively detected high energy γ-ray emission from more than 67 active galaxies of the blazar class. The majority of the EGRET blazars are flat-spectrum radio quasars, which are characterized by inferred isotropic luminosities often as high as 3 × 10 ergs s. The remainder are BL Lac objects, some of which have been detec...