Analysis Status of „Modification of the interaction in nuclear matter“

Ralf GregorII.Physikalisches Institut Giessen

motivation results of last experiment

analysis status outlook

motivation

V. Bernard et al. PRL 59 (1987) 966

0

1mm 0

00, +-

P. Schuck et al., nucl-th/0002031

R. Rapp et al., PRC 59 (1999) 1237

T. Hatsuda et al., PRL 82 (1999) 2840

TAPS@MAMI

difference between 00 and 0+/-

higher statistic needed

J. Messchendorp et al.,PRL 89 (2002) 222302

analysis status

different 00 bins with fits

carbon data

-> invariant mass distribution of the 00 channel

analysis status

different 00 bins with fits

calcium data

-> invariant mass distribution of the 00 channel

different 00 bins with fits

lead data

-> invariant mass distribution of the 00 channel

analysis status

different 0+/- bins with fits

carbon data

-> invariant mass distribution of the 0+/-

channel

analysis status

different 0+/- bins with fits

calcium data

-> invariant mass distribution of the 0+/-

channel

analysis status

different 0+/- bins with fits

lead data

-> invariant mass distribution of the 0+/-

channel

analysis status

analysis status

E = 400-460 MeV

lead-carbon-ratio

lead

/car

bon

(a.u

.)

M() (MeV)

M() (MeV)

00

0+/-

outlook

O.Buss(BUU-model,Giessen theory group)

outlook

-Error bars-Efficiency correction-Comparison with theory