No abstract

We have observed a narrow state near 2.32 GeV/c(2) in the inclusive D(+)(s)pi(0) invariant mass distribution from e(+)e(-) annihilation data at energies near 10.6 GeV. The observed width is consistent with the experimental resolution. The small intrinsic width and the quantum numbers of the final state indicate that the decay violates isospin conservation. The state has natural spin-parity and the low mass suggests a J(P)=0(+) assignment. The data sample corresponds to an integrated luminosity of 91 fb(-1) recorded by the BABAR detector at the SLAC PEP-II asymmetric-energy e(+)e(-) storage ring.

We report the results of a search for T, CP, CPT, and violation in B0-B0 mixing using an inclusive dilepton sample collected by the BABAR experiment at the PEP-II factory. Using a sample of 232 x 10(6) BB pairs, we measure the T and CP violation parameter |q/p| - 1 = (-0.8 +/- 2.7(stat) +/- 1.9(syst) x 10(-3), and the CPT and CP parameters Imz = (13.9 +/- 7.3(stat) +/- 3.2(syst)) x 10(-3) and Delta Gamma x Rez = (7.1 +/- 3.9(stat) +/- 2.0(stat)) x 10(-3) ps(-1). The statistical correlation between the measurements of Imz and Delta Gamma x Rez is 76%.

We present a measurement of the cross section of the process e(+)e(-)-->pi(+)pi(-)psi(2S) from threshold up to 8 GeV center-of-mass energy using events containing initial-state radiation, produced at the SLAC PEP-II e(+)e(-) storage rings. The study is based on 298 fb(-1) of data recorded with the BABAR detector. A structure is observed in the cross section not far above threshold, near 4.32 GeV. We also investigate the compatibility of this structure with the Y(4260) previously reported by this experiment.

= 3 GeV. The Stanford Linear Accelerator Laboratory results of e+e -l+l +missing energy can be explained as e', e' production followed by decays to ev, , JU, v&, or their antiparticles. The v, ' would be absolutely stable and escape detection. The decay of the v"' requires a mixing of either v&' or p. ' with lighter leptons.The charmed quark c will decay preferably to the p quark through the enhanced J'J'" interaction. Leptonic decays of the cn can then account for the dileptonic events seen at FNAL. The heavy pseudoscalars A. 'n, c'c, etc. , will decay via the enhanced O'J to other heavy mesons. The P'n, , n,'n, etc. , decay via the weaker interactions such as O'J', J Js or O'K', J'I . The model also in general predicts CP nonconservation by virture of the fact that J', J' are CP even while J is CP odd, so that terms linear in J' do not conserve CP. This point will be discussed in a longer paper under preparation.