We study the decay constants ($f_M$) of the heavy vector ($D^{ *}$, $D^{ *}_{ s}$, $B^{ *}$, $B^{ *}_{ s}$, $B^{ *}_{ c}$) and tensor ($D_{ 2}^{ *}$, $D_{ s2}^{ *}$, $B^{ *}_{ 2}$, $B^{ *}_{ s2}$) mesons in the light front quark model. With the known pseudoscalar meson decay constants of $f_D$, $f_{ D_s}$, $f_B$, $f_{ B_s}$, and $f_{ B_c}$ as the input parameters to determine the light-front meson wave functions, we obtain that $f_{ D^{ *}, D^{ *}_{ s}, B^{ *},B^{ *}_s,B^{ *}_c} = (252.0^{ +13.8}_{ -11.6}$, $318.3^{ +15.3}_{ -12.6}$ , $201.9^{ +43.2}_{ -41.4}$, $244.2\pm7.0$, $473.4\pm18.2$) and $(264.9^{ +10.2}_{ -9.5}$, $330.9^{ +9.9}_{ -9.0}$, $220.2^{ +49.1}_{ -46.2}$, $265.7\pm8.0$, $487.6\pm19.2$) MeV with Gaussian and power-law wave functions, respectively, while $f_{ D_{ 2}^{ *},D_{ s2}^{ *},B^{ *}_{ 2},B^{ *}_{ s2}}$= ($143.6^{ +24.9}_{ -21.8}$, $209.5^{ +29.1}_{ -24.2}$, $80.9^{ +33.8}_{ -27.7}$, $109.7^{ +15.7}_{ -15.0}$) MeV with only Gaussian wave functions.
Categories: hep-ph