First identical-pion correlations measured at RHIC energies by PHENIX are presented. Two analyses with separate detectors, systematics, and statistics provide consistent results. The resulting HBT radii are moderately larger than those measured at lower energies. The kt dependence of the Bertsch-Pratt HBT radii is also similar to previous measures and is consistent with the conjecture of an exp...

1. National Institute of Nanotechnology, 11421 Saskatchewan Drive, Edmonton, Canada 2. Department of Physics, University of Alberta, T6G 2E1, Edmonton, Canada 3. ECE, University of Alberta, Canada 4. NIMS, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan 5. Hitachi High-Technologies Corp., 882, Ichige, Hitachinaka-shi, Ibaraki-ken, 312-8504, Japan 6. KLA-Tencore, One Technology Drive, Milpitas, Cal...

We have developed a model for the NN → NNππ reaction and evaluated cross sections for the different charged channels. The low energy part of those channels where the pions can be in an isospin zero state is dominated by N∗(1440) excitation, driven by an isoscalar source followed by the decay N∗ → N(ππ) S−wave . At higher energies, and in channels where the pions are not in T=0, ∆ excitation mec...

The universal curve σ/A of nuclear photoabsorption is investigated within a Fermi gas model of nuclear matter. An energy range from pion threshold up to 400 MeV is considered. The interactions between nu-cleon, pion, ∆-isobar and photon are considered in the non-relativistic approximation with corrections of the order 1/M taken into account with respect to proton mass. Analytical expressions ar...

Photofragment yield spectra and NO(X(2)Pi(1/2,3/2); v = 1, 2, 3) product vibrational, rotational, and spin-orbit state distributions were measured following NO dimer excitation in the 4000-7400 cm(-1) region in a molecular beam. Photofragment yield spectra were obtained by monitoring NO(X(2)Pi; v = 1, 2, 3) dissociation products via resonance-enhanced multiphoton ionization. New bands that incl...

Pion double charge exchange ~DCX! on nuclear targets has been extensively studied, both experimentally and theoretically, throughout the last two decades. Because at least two nucleons must be involved in the process, the study of DCX is a natural tool for exploring nucleon-nucleon correlations. In the course of these studies at low energies, a prominent peak in the (p,p) cross section in the n...

The excess in the positron fraction measured by PAMELA has been interpreted as due to annihilation or decay of dark matter in the Galaxy. More prosaically it has been ascribed to direct production of positrons by nearby pulsars or due to pion production during diffusive shock acceleration of hadronic cosmic rays in nearby sources. We point out that measurements of secondary cosmic ray nuclei ca...

The effect of pion-pion scattering resonance on the isovector part of nucleon structure is analysed by a method similar to that of Frazer and Fulco, but with one more subtraction for dispersion relations on helicity amplitudes of nucleon·aritinucleon production process in order to remedy the divergence regarding the left-hand cut. If the subtracted spectral representations are used for the form...

We investigate charged and neutral current neutrino-induced incoherent pion production off nuclei within the GiBUU model at energies relevant for the MiniBooNE and K2K experiments. Special attention is paid to the entanglement between measured CCQE and CC1π+ cross sections. We further give predictions and compare to recent data measured at MiniBooNE.

The in-medium modification of nucleon-nucleon (NN) cross sections is investigated by means of particle production in heavy ion collisions (HIC) at intermediate energies. In particular, the density dependence of the inelastic cross sections considerably affects the pion and kaon yields and their rapidity distributions. However, the (π/π)and (K/K)-ratios depend only moderately on the in-medium be...