First Results on 12Lambda-C production at DAPHNE

Abstract

Lambda-hypernuclei are produced and studied, with the FINUDA spectrometer, for the first time at an e+e- collider: DAPHNE, the Frascati phi-factory. The slow negative kaons from phi(1020) decay are stopped in thin (0.2 g/cm^2) nuclear targets, and Lambda-hypernuclei formation is detected by measuring the momentum of the outgoing pi^-. A preliminary analysis on 12Lambda-C shows an energy resolution of 1.29 MeV FWHM on the hypernuclear levels, the best obtained so far with magnetic spectrometers at hadron facilities. Capture rates for the ground state and the excited ones are reported, and compared with previous experiments.

15 pages, 5 figures. v2: one reference updated. Accepted for publication in Phys. Lett. B

References in corpus (2)

• Study of chirally motivated low-energy $K^{-}$ optical potentials
• Shell-Model Description of Lambda Hypernuclei

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