2017/02/28 by Y. K. Hsiao, Yu Yao, Yao Yu +2 · 26 citations
Mathematics · Physics and Astronomy · #Combinatorics #Crystallography #Mathematics #Neutrino Physics Research #Omega #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.95.093001
published in Physical review. D/Physical review. D. 95(9) (American Physical Society) · 13 pages, no figure, version accepted by PRD
arxiv created 2017/04/18 · openalex publication_date 2017/05/02 · arxiv updated 2017/05/10 · openalex created_date 2021/04/13 · openalex updated_date 2026/08/05
We study the charmless two-body decays of b baryons (\mathrm\ensuremathΛb, \mathrm\ensuremathΞb^\ensuremath-, \mathrm\ensuremathΞb0). We find that B(\mathrm\ensuremathΞb^\ensuremath-\ensuremath→\mathrm\ensuremathΛ\ensuremathρ^\ensuremath-)=(2.08_\ensuremath-0.51+0.69)\ifmmode×\else\texttimes\fi10^\ensuremath-6 and B(\mathrm\ensuremathΞb0\ensuremath→\mathrm\ensuremathΣ+M^\ensuremath-)=(4.45_\ensuremath-1.09+1.46,11.49_\ensuremath-2.9+3.8,4.69_\ensuremath-0.79+1.11,2.98_\ensuremath-0.51+0.76)\ifmmode×\else\texttimes\fi10^\ensuremath-6 for M^\ensuremath-=\phantom\rule0ex0ex(\ensuremathπ^\ensuremath-,\ensuremathρ^\ensuremath-,K^\ensuremath-,K^*\ensuremath-), which are compatible with B(\mathrm\ensuremathΛb\ensuremath→p\ensuremathπ^\ensuremath-,pK^\ensuremath-). We also obtain that B(\mathrm\ensuremathΛb\ensuremath→\mathrm\ensuremathΛ\ensuremathω)=\phantom\rule0ex0ex(2.30\ifmmode±\else\textpm\fi0.10)\ifmmode×\else\texttimes\fi10^\ensuremath-6, B(\mathrm\ensuremathΞb^\ensuremath-\ensuremath→\mathrm\ensuremathΞ^\ensuremath-\ensuremathφ,\mathrm\ensuremathΞ^\ensuremath-\ensuremathω)\ensuremath≃B(\mathrm\ensuremathΞb0\ensuremath→\mathrm\ensuremathΞ0\ensuremathφ,\mathrm\ensuremathΞ0\ensuremathω)=(5.35\ifmmode±\else\textpm\fi0.41,3.65\ifmmode±\else\textpm\fi0.16)\ifmmode×\else\texttimes\fi10^\ensuremath-6 and B(\mathrm\ensuremathΞb^\ensuremath-\ensuremath→\mathrm\ensuremathΞ^\ensuremath-\ensuremathη^(\ensuremath'))\ensuremath≃B(\mathrm\ensuremathΞb0\ensuremath→\mathrm\ensuremathΞ0\ensuremathη^(\ensuremath'))=(2.51_\ensuremath-0.46+0.70,2.99_\ensuremath-0.57+1.16)\ifmmode×\else\texttimes\fi10^\ensuremath-6. For the CP-violating asymmetries, we show that ACP(\mathrm\ensuremathΛb\ensuremath→pK^*\ensuremath-)=ACP(\mathrm\ensuremathΞb^\ensuremath-\ensuremath→\mathrm\ensuremathΣ0(\mathrm\ensuremathΛ)K^*\ensuremath-)=ACP(\mathrm\ensuremathΞb0\ensuremath→\mathrm\ensuremathΣ+K^*\ensuremath-)=(19.7\ifmmode±\else\textpm\fi1.4)%. Similar to the charmless two-body \mathrm\ensuremathΛb decays, the \mathrm\ensuremathΞb decays are accessible to the LHCb detector.