Close F E, Dudek J J
Department of Physics-Theoretical Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, United Kingdom.
Phys Rev Lett. 2003 Oct 3;91(14):142001. doi: 10.1103/PhysRevLett.91.142001.
We make the first calculation of the electroweak couplings of hybrid mesons to conventional mesons appropriate to photoproduction and to the decays of B or D mesons. E1 amplitudes are found to be large and may contribute in charge exchange gammap-->nH(+) allowing production of (among others) the charged 1(-+) exotic hybrid off a(2) exchange. Axial hybrid meson photoproduction is predicted to be large courtesy of pi exchange, and its strange hybrid counterpart is predicted in B-->psiK(H)(1(+)) with branching ratio B approximately 10(-4). Higher multipoles and some implications for hybrid charmonium are briefly discussed.
我们首次计算了混合介子与常规介子的电弱耦合，这适用于光生过程以及B或D介子的衰变。发现E1振幅很大，并且可能在电荷交换γp→nH(+)过程中起作用，从而（除其他外）允许通过a(2)交换产生带电的1(-+)奇异混合介子。预计由于π交换，轴向混合介子的光生过程会很大，并且在B→ψK(H)(1(+))中预测了其奇异混合介子对应物，分支比B约为10^(-4)。简要讨论了更高的多极矩以及对混合粲偶素的一些影响。
