Study of the Possibility of Supernarrow Dibaryon Production in the vecgamma d pipm} +D R.pdfVIP

STUDY OF THE POSSIBILITY OF SUPERNARROW DIBARYON PRODUCTION IN THE γd → π± + D REACTIONS 9 9 V.V. Alekseev, S.N. Cherepnya, L.V. Fil’kov and V.L. Kashevarov 9 1 Abstract b e F The possibility of observation of supernarrow dibaryons, decay of which into two nucleons 5 forbidden by the Pauli principle, produced in processes of charged pion photoproduction by 1 polarized photons from the deuteron is analyzed. It is shown that the expectable dibaryon 2 yield may exceed the background by a factor of 10–100. v 1 4 0 The possibility of existence of multi-quark states is predicted by QCD [1]. This is a new 2 1 type of matter. The experimental discovery of such states might have serious consequences 8 for both elementary particle physics and nuclear physics. A search for narrow 6-quark states 9 (dibaryons) is being carried out for a long time (see, e.g., [2, 3]), and a number of candidates / h for these states has been found. However, up to the present day, one can hardly unambiguously t l- state that the features found in these experiments were indeed dibaryons. This associated, first c of all, with a relatively low contribution of dibaryons to the processes under study and the u n uncertainty of the contribution of the background processes. : v We propose to seek for supernarrow dibaryons whose decay into two nucleons is forbidden i by the Pauli principle [4, 5, 6, 7, 8, 9]. Such dibaryons satisfy the condition X r a (−1)T +S P = +1, (1) where T is the isotopic spin, S is t