0 60 10 32 v 2 2 4 Fe b 20 06 Search for Θ + via π − p → K − X reaction near production threshold

32 v 1 2 3 Ja n 20 06 Search for Θ + via π − p → K − X reaction near production threshold

We have searched for Θ via π−p → K−X reaction using 1.87 and 1.92 GeV/c π− beam at the K2 beam line of the KEK 12 GeV Proton Synchrotron. In the missing mass spectrum at beam momentum of 1.92 GeV/c, a bump has been found at 1530MeV/c which is consistent with the mass reported by several experiments. The statistical significance of this bump, however, is only 2.5−2.7σ. Therefore we have derived ...

X iv : h ep - p h / 06 02 19 6 v 1 2 1 Fe b 20 06 Elliptic Flow and Fixed p T Suppression in a Final State Interaction Model

It has been shown that a final state interaction model, used to describe J/ψ suppression, can also describe the fixed p T suppression of the π 0 (and charged pions) yield at all values of p T , with a final state interaction cross-section σ close to one milibarn. We propose an extension of the model to the pion motion in the transverse plane – which introduces a dependence of the suppression on...

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 ...

ep - p h / 04 02 21 6 v 1 2 0 Fe b 20 04 Spin observables in the NN → Y Θ + reaction at the threshold and quantum numbers of the Θ + pentaquark

ar X iv : h ep - e x / 05 10 01 9 v 2 2 6 N ov 2 00 5 The kappa in E 791 data for D → Kππ

A combined fit is made to E791 data on D → Kππ, LASS data on Kπ elastic scattering, and BES II data on J/Ψ → K * (890)Kπ. In all cases, the Kπ S-wave is fitted well with a κ pole and K 0 (1430); the κ requires an s-dependent width with an Adler zero near threshold. The pole position of the κ is at M = (750 +30 −55) − i(342 ± 60) MeV. The E791 collaboration fitted their data using a form factor ...