adding decfiles for SL spectroscopy analysis

See MR!1614 for details.

Adding potential background for tau and double charm decays

• \bar{B}^0 \rightarrow D^0(\rightarrow K^- \pi^+) \pi^+ \tau^-(\rightarrow \mu^- \bar{\nu}_{\mu}\nu_\tau)\bar{\nu}_\tau (11674010)
• B^- \rightarrow D^+(\rightarrow K^{-} \pi^{+}\pi^+) \pi^{-} \tau^-(\rightarrow \mu^{-} \bar{\nu}_{\mu}\nu_\tau)\bar{\nu}_\tau (12675030)
• \bar{B}_s^0 \rightarrow D_s^{+}(\rightarrow \pi^{+} K^{-} K^{+}) \pi^0 \tau^-(\rightarrow \mu^{-} \bar{\nu}_{\mu} \nu_\tau)\bar{\nu}_\tau (13674410)
• B_s^0 \rightarrow D^0(\rightarrow K^{-} \pi^{+}) K^+ \tau^-(\rightarrow \mu^-\bar{\nu}_\mu \nu_\tau)\bar{\nu}_\tau (13674020)
• \bar{B}^0\rightarrow D^0(\rightarrow K^-\pi^+)\bar{D}^0(\rightarrow \pi^+\ell^-\bar{\nu}_{\ell}) (11674000)
• B^- \rightarrow D^0 (\rightarrow K^-\pi^+)D^-(\rightarrow \pi^+\pi^- \ell^- \bar{\nu}_\mu) (12675020)
• \bar{B}_s^0 \rightarrow D^0(\rightarrow K^{-} \pi^{+}) \bar{D}^0 (\rightarrow K^+ \ell^- \bar{\nu}_\ell) (13674010)
• \bar{B}_s^0 \rightarrow D_s^+ (\rightarrow \pi^+K^-K^+) D^- (\rightarrow \pi^0 \ell^- \bar{\nu}_\mu) (13674400)

I am also adding one more signal mode

• \bar{B}_s^0 \rightarrow D^0(\rightarrow K^{-} \pi^{+}) K^+ \ell^- \bar{\nu}_\ell (13574005)