ar X iv : h ep - e x / 05 06 02 9 v 1 1 1 Ju n 20 05 Entropy Analysis in π + p and K + p Collisions at √ s = 22 GeV

ar X iv : h ep - e x / 02 11 06 8 v 1 2 7 N ov 2 00 2 Analyzing Powers for Forward p ↑ + p → π 0 + X at STAR

Preliminary results of the analyzing power for the production of forward, high-energy π 0 mesons from collisions of transversely polarized protons at √ s = 200 GeV from STAR are presented. The kinematic ranges covered by the data are x F ≈ 0.2 − 0.6 and p T ≈ 1 − 3 GeV/c. The analyzing power at √ s = 200 GeV is found to be comparable to that observed at √ s = 20 GeV.

ar X iv : h ep - e x / 01 06 05 3 v 1 1 3 Ju n 20 01 Measurement of the Σ − Charge Radius by Σ − – Electron Elastic Scattering The SELEX

The Σ− mean squared charge radius has been measured in the space-like Q range 0.035–0.105 GeV/c by elastic scattering of a Σ− beam off atomic electrons. The measurement was performed with the SELEX (E781) spectrometer using the Fermilab hyperon beam at a mean energy of 610 GeV/c. We obtain 〈r2 ch〉Σ− = (0.61 ± 0.12 (stat.) ± 0.09 (syst.)) fm. The proton and π− charge radii were measured as well ...

ar X iv : h ep - p h / 05 06 11 1 v 1 1 1 Ju n 20 05 Transverse positron polarization in the μ + → e + ν̄ μ ν e decay in

ar X iv : h ep - p h / 05 06 11 1 v 2 1 4 Ju n 20 05 Transverse positron polarization in the μ + → e + ν̄ μ ν e decay in

ar X iv : h ep - e x / 06 01 02 0 v 1 1 3 Ja n 20 06 ISR PHYSICS AT BABAR

We present a review of BaBar results on e+e-annihilations into exclusive hadronic final states using the initial state radiation technique. Cross sections over the √ s range from threshold to 4.5 GeV, with very small point-to-point systematic errors, are presented for the 3π, 2(π + π −), 3(π + π −), 2(π + π −)2π 0 , K + K − π + π − , 2(K + K −) and p¯ p final states. The proton form factor and ...