Direct observation of a rho decay of the D-13(1520) baryon resonance - art. no. 052001

Langgartner, W Ahrens, J Beck, R Hejny, V Kotulla, M Krusche, B Kuhr, V Leukel, R McGregor, JD Messchendorp, JG Metag, V Novotny, R de Leon, VO Owens, RO Rambo, F Schadmand, S Schmidt, A Siodlaczek, U Stroher, H Weiss, J Wissmann, F Wolf, M

W. Langgartner et al., Direct observation of a rho decay of the D-13(1520) baryon resonance - art. no. 052001, PHYS REV L, 8705(5), 2001, pp. 2001

22

INGLESE

Article

Physics

PHYSICAL REVIEW LETTERS

0031-9007 → ACNP

8705

5

2001

ISI

0031-9007(20010730)8705:5<2001:DOOARD>2.0.ZU;2-P

The reaction gammap --> pi (+)pi (o)n has been measured at MAMI for photon energies up to 820 MeV. Invariant mass spectra of the particles in the fina l state (pi (+)n), (pi (o)n), (pi (+)pi (o)) have been determined for sever al bins of incident photon energy. Differences in pi (+)pi (o) and simultan eously measured pi (o)pi (o) invariant mass distributions are assigned to a rho branch of the D-13(1520) nucleon resonance.