Journal article

Publication year: 2002

Journal: Physical Review Letters

Volume number: 89

Issue number: 22

ISSN: 0031-9007

Open access status: Green

DOI Link: https://doi.org/10.1103/PhysRevLett.89.222302

Publisher: American Physical Society

Abstract: 
Differential cross sections of the reactions (gamma,pi(0)pi(0)) and (gamma,pi(0)pi(+/-)) have been measured for several nuclei (H-1,C-12, and Pb-nat) at an incident-photon energy of E-gamma=400-460 MeV at the tagged-photon facility at MAMI-B using the TAPS spectrometer. A significant nuclear-mass dependence of the pipi invariant-mass distribution is found in the pi(0)pi(0) channel. This dependence is not observed in the pi(0)pi(+/-) channel and is consistent with an in-medium modification of the pipi interaction in the I=J=0 channel. The data are compared to pi-induced measurements and to calculations within a chiral-unitary approach.

Harvard Citation style: Messchendorp, J., Janssen, S., Kotulla, M., Ahrens, J., Annand, J., Beck, R., et al. (2002) In-medium modifications of the ππ interaction in photon-induced reactions -: art. no. 222302, Physical Review Letters, 89(22), Article 222302. https://doi.org/10.1103/PhysRevLett.89.222302

APA Citation style: Messchendorp, J., Janssen, S., Kotulla, M., Ahrens, J., Annand, J., Beck, R., Bloch, F., Caselotti, G., Fog, L., Hornidge, D., Krusche, B., Langgärtner, W., McGeorge, J., MacGregor, I., Mengel, K., Metag, V., Novotny, R., Owens, R., Pfeiffer, M., ...Schadmand, S. (2002). In-medium modifications of the ππ interaction in photon-induced reactions -: art. no. 222302. Physical Review Letters. 89(22), Article 222302. https://doi.org/10.1103/PhysRevLett.89.222302