Evidence for a backward peak in the gamma+d->pi^0+d cross section near the eta threshold

High-quality cross sections for the reaction gamma+d->pi^0+d have been measured using the CLAS at Jefferson Lab over a wide energy range near and above the eta-meson photoproduction threshold. At backward c.m. angles for the outgoing pions, we observe a resonance-like structure near E_gamma=700 MeV. Our model analysis shows that it can be explained by eta excitation in the intermediate state. The effect is the result of the contribution of the N(1535)S_11 resonance to the amplitudes of the subprocesses occurring between the two nucleons and of a two-step process in which the excitation of an intermediate eta meson dominates.Comment: slightly modified title, additional paragraph and a table (Table 2) added on p. 5; to be submitted to EPJA, 6 pages, 3 figure

CMS physics technical design report : Addendum on high density QCD with heavy ions

Peer reviewe

The B-H6 tube light source for interferometry /

"Project No. TB3-0108J of the Research and Development Division, Ordnance Corps.""March 1953."Includes bibliographical references (page 9).Mode of access: Internet

Monochromatic light source for interferometry of high-speed gas flows /

"Project No. TB3-0108H of the Research and Development Division, Ordnance Corps.""April 1952."Includes bibliographical references (page 13).Mode of access: Internet