Long-Distance Contribution to \Delta\Gamma s/\Gamma s of the $B_s-\bar{B}_s$ System

Understand

We estimate the long-distance contribution to the \Delta{\Gamma}s of B_s system, based mainly on two-body D^(*)_s\Dbar^(*)_s modes and three-body D^(*)_s\Dbar^(*)\Kbar^(*) modes (and their CP conjugates).

• Some higher c\bar{s} resonances are also considered.
• The contribution to \Delta{\Gamma}s/{\Gamma}s by two-body modes is 10.2+-3.0%, slightly smaller than the short-distance result of 13.3+-3.2%.
• The contribution to width difference by D*_s0(2317), D_s1(2460), and D_s1(2536) resonances is negligible.