Spectrum and strong couplings of heavy-light hybrids

The spectrum of the 0(++), 0(--), 1(-+), and 1(+-) heavy-light hybrids are calculated in HQET. The interpolated currents of the hybrids are chosen as (alpha)G(alpha mu)(a)Th(upsilon)(x), (alpha)gamma(5)G(alpha mu)(a)T(a)h(upsilon)(x), and (mu alpha)G(alpha mu)(a)T(a)h(upsilon)(x). Some strong couplings and decay widths of the heavy-light hybrids to B(D) pi are calculated by using QCD sum rules. The masses of 0(++) hybrids with a gluon in TM(1(--)) and TE(1(+-)) modes are found to be similar, while the decay widths of them are found to be different. A two-point correlation function between the pion and vacuum is employed and the leading order of 1/M-Q expansion is kept in our calculation.