ar X iv : h ep - p h / 02 09 07 1 v 1 6 S ep 2 00 2 SCALING PROPERTIES OF HADRON PRODUCTION IN π − − p AND π − − A COLLISIONS AT HIGH

ar X iv : h ep - p h / 02 06 06 1 v 2 9 J un 2 00 2 B̄ 0 → π + X in the Standard Model

In this paper we investigate the possibility of studying B → π form factor using the semi-inclusive decays ¯

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 - p h / 02 05 01 6 v 1 2 M ay 2 00 2 Scalar a 0 ( 980 ) meson in φ → π 0 ηγ decay

ar X iv : h ep - p h / 98 09 31 4 v 1 9 S ep 1 99 8 HIGH p T PHENOMENA IN HEAVY ION COLLISIONS AT √ s = 20 and 200 AGeV

Jet quenching as observed via high pT hadron production is studied in the HIJING1.35 model. We test the model on recent WA98 data on 160 AGeV Pb+ Pb → π up to 4 GeV/c. The results depend sensitively on the model of the Cronin effect. At (RHIC) collider energies ( √ s > 200 AGeV), on the other hand, semi-hard hadron production becomes insensitive to the above model and is thus expected to be a c...

ar X iv : h ep - p h / 02 10 07 4 v 1 4 O ct 2 00 2 Effective vertex for π 0 γγ §

The π 0 γγ vertex is used as an explicit example of the subtleties connected with the application of equation of motion within Chiral Perturbation Theory at the order O(p 6).