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In-medium modifications of the pipi interaction in photon-induced reactions.
- Source :
-
Physical review letters [Phys Rev Lett] 2002 Nov 25; Vol. 89 (22), pp. 222302. Date of Electronic Publication: 2002 Nov 08. - Publication Year :
- 2002
-
Abstract
- Differential cross sections of the reactions (gamma,pi(0)pi(0)) and (gamma,pi(0)pi(+/-)) have been measured for several nuclei (1H,12C, and (nat)Pb) 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.
Details
- Language :
- English
- ISSN :
- 0031-9007
- Volume :
- 89
- Issue :
- 22
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 12485064
- Full Text :
- https://doi.org/10.1103/PhysRevLett.89.222302