2 8 N ov 2 01 1 D − mesic atoms C . Garćıa - Recio
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چکیده
The anti-D meson self-energy is evaluated self-consistently, using unitarized coupledchannel theory, by computing the in-medium meson-baryon T -matrix in the C = −1, S = 0 sector. The heavy pseudo-scalar and heavy vector mesons, D̄ and D̄, are treated on equal footing as required by heavy quark spin symmetry. Results for energy levels and widths of D mesic atoms in 12C, 40Ca, 118Sn and 208Pb are presented. The spectrum contains states of atomic and of nuclear types for all nuclei. D̄0-nucleus bound states are also obtained. We find that, after electromagnetic and nuclear cascade, these systems end up with the D̄ bound in the nucleus, either as a meson or as part of a exotic D̄N (pentaquark) loosely bound state.
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تاریخ انتشار 2011