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Дата последнего поиска статьи во внешних источниках: 29 мая 2015 г.
Аннотация:A new method for calculation of the mixing angle between the
hadrons within QCD sum rules is proposed. In this method, the mix-
ing is expressed in terms of quark and gluon degrees of freedom. As
an application, the detailed calculation of the mixing angle between
heavy cascade baryons Xi_Q and Xi'_Q,
Q, Q = c, b is presented and it is
found that the mixing angle between Xi_b,c and Xi'b,c
is given by
theta_b = 6.4◦ ± 1.8◦ (theta_c = 5.5◦ ± 1.8◦).
PACS: 10.55.Hx; 10.20.Lq; 10.20.Mr