First observation of in-medium modifications of the omega meson

+pi0+photon%22&type=SU">omega(783) --> pi0 photon, Nuclear Theory, FOS: Physical sciences, (pi0 photon) [mass spectrum], photon nucleus --> omega(783) anything, 0.64-2.53 GeV, High Energy Physics - Experiment, Nuclear Theory (nucl-th), High Energy Physics - Experiment (hep-ex), ddc:550, Bonn ELSA Stor, SPECTROMETER, density [nuclear matter], Nuclear Experiment (nucl-ex), Nuclear Experiment, AU COLLISIONS, mass [omega(783)], NUCLEI, PAIRS, momentum [omega(783)], radiative decay [omega(783)], High Energy Physics::Experiment, photoproduction [omega(783)], inclusive reaction [photon nucleus], NAMBU, niobium, VECTOR-MESONS, MATTER, experimental results -->
Popis: 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 A(gamma, omega)X. Results obtained for Nb are compared to a reference measurement on a liquid hydrogen target. While for recoiling, long-lived mesons (pi, eta and etaprime), which decay outside of the nucleus, a difference in the lineshape for the two data samples is not observed, we find a significant enhancement towards lower masses for omega mesons with low momenta produced on the Nb target.
Comment: Latex, 4 pages, 4 figures, accepted by Phys. Rev. Lett; references re-arranged, now references in chronological order in first paragraph
ISSN: 0031-9007
DOI: 10.48550/arxiv.nucl-ex/0504010
DOI: 10.1103/PhysRevLett.94.192303
Přístupová URL adresa: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a9b7a42dc8e04ffe6d2929a06eab790
Rights: OPEN
Přírůstkové číslo: edsair.doi.dedup.....0a9b7a42dc8e04ffe6d2929a06eab790
Autor: Trnka, D., Anton, G., Bacelar, J.C.S, Bartholomy, O., Bayadilov, D., Beloglazov, Y.A., Bogendorfer, R., Castelijns, R.J.J., Crede, V., Dutz, H., Ehmanns, A., Elsner, D., Ewald, R., Fabry, I., Fuchs, M., Essig, K., Funke, Ch., Gothe, R., Gregor, R., Gridnev, A., Gutz, E., Hoffgen, S.K., Hoffmeister, P., Horn, I., Hössl, J., Jaegle, I., Junkersfeld, J., Kalinowsky, H., Klein, Frank, Klein, Fritz, Klempt, E., Konrad, M., Kopf, B., Kotulla, M., Krusche, B., Langheinrich, J., Löhner, H., Lopatin, I., Lotz, J., Lugert, S., Menze, D.W., Messchendorp, J.G., Mertens, T., Metag, V., Morales, C., Nanova, M., Novotny, R., Ostrick, M., Pant, L.M., van Pee, H., Pfeiffer, M., Roy, A., Radkov, A., Schadmand, S., Schmidt, Ch., Schmieden, H., Schoch, B., Shende, S., Suft, G., Sumachev, V., Szczepanek, T., Sule, A., Thoma, U., Varma, R., Walther, D., Weinheimer, Ch., Wendel, Ch.
Přispěvatelé: KVI - Center for Advanced Radiation Technology
Rok vydání: 2005
Předmět:
Zdroj: Physical review letters 94, 192303 (2005). doi:10.1103/PhysRevLett.94.192303
Physical Review Letters, 94(19):192303. AMER PHYSICAL SOC
ISSN: 0031-9007
DOI: 10.48550/arxiv.nucl-ex/0504010
Popis: 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 A(gamma, omega)X. Results obtained for Nb are compared to a reference measurement on a liquid hydrogen target. While for recoiling, long-lived mesons (pi, eta and etaprime), which decay outside of the nucleus, a difference in the lineshape for the two data samples is not observed, we find a significant enhancement towards lower masses for omega mesons with low momenta produced on the Nb target.
Comment: Latex, 4 pages, 4 figures, accepted by Phys. Rev. Lett; references re-arranged, now references in chronological order in first paragraph
Databáze: OpenAIRE
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