ar X iv : h ep - e x / 05 06 02 8 v 2 2 6 O ct 2 00 5 Upper Limit on the Branching Ratio for the Decay π 0 → νν

ar X iv : h ep - p h / 02 05 01 6 v 2 3 0 O ct 2 00 2 Scalar a 0 ( 980 ) meson in φ → π 0 ηγ decay

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 - e x / 06 03 02 4 v 2 3 1 Ju l 2 00 6 Determining the upper limit of Γ ee for the Y ( 4260 )

By fitting the R values between 3.7 and 5.0 GeV measured by the BES collaboration, the upper limit of the electron width of the newly discovered resonance Y (4260) is determined to be 580 eV/c 2 at 90% C.L. Together with the BaBar measurement on Γee·B(Y (4260) → π + π − J/ψ), this implies a large decay width of Y (4260) → π + π − J/ψ final states.

ar X iv : h ep - p h / 02 06 06 1 v 1 6 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 ¯ B 0 → π + + X q. In general B → P X semi-inclusive decays involve several hadronic parameters. But for ¯ B 0 → π + X q decays we find that in the factorization approximation, the only unknown hadronic parameters are the form factors F B→π 0,1. Therefore these form factors can be studied ...

ar X iv : h ep - e x / 04 03 02 0 v 1 1 2 M ar 2 00 4 Search for Θ + and Ξ − − 3 / 2 pentaquarks in HERA - B

A search for Θ + (1540) and Ξ −− 3/2 (1860) pentaquark candidates has been performed in proton-induced reactions on C, Ti and W targets at √ s = 41.6 GeV studying the pK 0 S resp. Ξ − π − and Ξ − π + (and charge conjugated (c.c.)) decay channels at mid-rapidity. With sensitivities of Br×dσ/dx F < 5 to 25 µb/nucleon, we find no evidence for narrow pentaquark peaks in any of the studied final sta...