Journalartikel
Autorenliste: Trnka, D; Anton, G; Bacelar, JCS; Bartholomy, O; Bayadilov, D; Beloglazov, YA; Bogendörfer, R; Castelijns, R; Crede, V; Dutz, H; Ehmanns, A; Elsner, D; Ewald, R; Fabry, I; Fuchs, M; Essig, K; Funke, C; Gothe, R; Gregor, R; Gridnev, AB; Gutz, E; Höffgen, S; Hoffmeister, P; Horn, I; Hössl, J; Jaegle, I; Junkersfeld, J; Kalinowsky, H; Klein, F; Klein, F; Klempt, E; Konrad, M; Kopf, B; Kotulla, M; Krusche, B; Langheinrich, J; Löhner, H; Lopatin, IV; Lotz, J; Lugert, S; Menze, D; Messchendorp, JG; Mertens, T; Metag, V; Morales, C; Nanova, M; Novotny, R; Ostrick, M; Pant, LM; van Pee, H; Pfeiffer, M; Roy, A; Radkov, A; Schadmand, S; Schmidt, C; Schmieden, H; Schoch, B; Shende, S; Suft, G; Sumachev, VV; Szczepanek, T; Süle, A; Thoma, U; Varma, R; Walther, D; Weinheimer, C; Wendel, C
Jahr der Veröffentlichung: 2005
Zeitschrift: Physical Review Letters
Bandnummer: 94
Heftnummer: 19
ISSN: 0031-9007
eISSN: 1079-7114
Open Access Status: Green
DOI Link: https://doi.org/10.1103/PhysRevLett.94.192303
Verlag: American Physical Society
Abstract:
The photoproduction of omega mesons on nuclei has been investigated using the Crystal Barrel/TAPS experiment at the ELSA tagged photon facility in Bonn. The aim is to study possible in-medium modifications of the omega meson via the reaction gamma+A ->omega+X ->pi(0)gamma+X-'. Results obtained for Nb are compared to a reference measurement on a LH2 target. While for recoiling, long-lived mesons (pi(0), eta, and eta(')), which decay outside of the nucleus, a difference in the line shape for the two data samples is not observed, we find a significant enhancement towards lower masses for omega mesons produced on the Nb target. For momenta less than 500 MeV/c an in-medium omega meson mass of M-medium=[722(-4)(+4)(stat)(-5)(+35)(syst)] MeV/c(2) has been deduced at an estimated average nuclear density of 0.6 rho(0).
Zitierstile
Harvard-Zitierstil: Trnka, D., Anton, G., Bacelar, J., Bartholomy, O., Bayadilov, D., Beloglazov, Y., et al. (2005) Observation of in-medium modifications of the ω meson -: art. no. 192303, Physical Review Letters, 94(19), Article 192303. https://doi.org/10.1103/PhysRevLett.94.192303
APA-Zitierstil: Trnka, D., Anton, G., Bacelar, J., Bartholomy, O., Bayadilov, D., Beloglazov, Y., Bogendörfer, R., Castelijns, R., Crede, V., Dutz, H., Ehmanns, A., Elsner, D., Ewald, R., Fabry, I., Fuchs, M., Essig, K., Funke, C., Gothe, R., Gregor, R., ...Wendel, C. (2005). Observation of in-medium modifications of the ω meson -: art. no. 192303. Physical Review Letters. 94(19), Article 192303. https://doi.org/10.1103/PhysRevLett.94.192303
Schlagwörter
AU COLLISIONS; JONA-LASINIO MODEL; NAMBU; NUCLEI; PAIRS; SPECTROMETER; VECTOR-MESONS
