$B_s^0 \to η^{(\prime)} η^{(\prime)}$ decays in the pQCD approach
| dc.creator | Liu, Xin | |
| dc.creator | Xiao, Zhen-Jun | |
| dc.creator | Wang, Hui-Sheng | |
| dc.date | 2007-04-08 | |
| dc.date.accessioned | 2026-07-07T11:56:32Z | |
| dc.date.available | 2026-07-07T11:56:32Z | |
| dc.description | We calculate the CP averaged branching ratios and CP-violating asymmetries for $B_s^0 \to ηη, ηη^\prime$ and $η^\prime η^\prime$ decays in the perturbative QCD (pQCD) approach here. The pQCD predictions for the CP-averaged branching ratios are $Br(B_s^0 \to ηη) = \left (14.2^{+18.0}_{-7.5}) \times 10^{-6}$, $Br(B_s^0 \to ηη^\prime)= \left (12.4 ^{+18.2}_{-7.0}) \times 10^{-6}$, and $Br(B_s^0 \to η^{\prime} η^{\prime}) = \left (9.2^{+15.3}_{-4.9}) \times 10^{-6}$, which agree well with those obtained by employing the QCD factorization approach and also be consistent with available experimental upper limits. The gluonic contributions are small in size: less than 7% for $B_s \to ηη$ and $ ηη^\prime$ decays, and around 18% for $B_s \to η' η'$ decay. The CP-violating asymmetries for three decays are very small: less than 3% in magnitude. | |
| dc.description | 11 pages, 1 ps figure, Revtex | |
| dc.identifier | https://arxiv.org/abs/0704.1027 | |
| dc.identifier | http://arxiv.org/abs/0704.1027 | |
| dc.identifier | Commun.Theor.Phys.49:981-986,2008 | |
| dc.identifier | doi:10.1088/0253-6102/49/4/36 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/205570 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | $B_s^0 \to η^{(\prime)} η^{(\prime)}$ decays in the pQCD approach | |
| dc.type | text |