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arXiv 0709.3364hep-ph
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B介子衰变的重子模

Baryon Modes of B Meson Decays

Fayyazuddin

备注：
12 pages, 3 figures
发表信息：
Phys.Rev.D77:014007,2008
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摘要：

The baryon decay modes of B,bar{B}-> N_{1} bar{N}_{2}(f), bar{N}_{1} N_{2} (bar{f}) provide a frame work to test CP-invariance in baryon sector. It is shown that in the rest frame of B, N_{1} and bar{N}_{2} come out with longitudnal polarization lambda_{1} = lambda_{2} = \pm 1 with decay width Gamma_{f} = Gamma_{f} ^{++}+ Gamma_{f} ^{--} and the asymmetry parameter alpha _{f}=ΔΓ_{f}=Γ_{f}^{++}- Gamma_{f} ^{--} . It is shown that CP invariance prediction alpha_{f} =- \bar{alpha}_{bar{f}} can be tested in these decay modes; especially in the time dependent decays of B_{q} ^{0}-bar{B}_{q}^{0} complex. Apart from this, it is shown that decay modes B(bar{B})-> N_{1} bar{N}_{2}(bar{N}_{1} N_{2} ) and subsequent non leptonic decays of N_{2} ,bar{N}_{2} or ( N_{1} ,bar{N}_{1}) into hyperon (antihyperon) also provide a frame work to study CP-odd observables in hyperon decays.

英文摘要：

The baryon decay modes of B,bar{B}-> N_{1}bar{N}_{2}(f), bar{N}_{1}N_{2}(bar{f}) provide a frame work to test CP-invariance in baryon sector. It is shown that in the rest frame of B, N_{1} and bar{N}_{2} come out with longitudnal polarization lambda_{1}=lambda_{2}=\pm 1 with decay width Gamma_{f}=Gamma_{f}^{++}+Gamma_{f}^{--} and the asymmetry parameter alpha _{f}=ΔΓ_{f}=Γ_{f}^{++}-Gamma_{f}^{--} . It is shown that CP invariance prediction alpha_{f}=-\bar{alpha}_{bar{f}} can be tested in these decay modes; especially in the time dependent decays of B_{q}^{0}-bar{B}_{q}^{0} complex. Apart from this, it is shown that decay modes B(bar{B})->N_{1}bar{N}_{2}(bar{N}_{1}N_{2}) and subsequent non leptonic decays of N_{2},bar{N}_{2} or (N_{1},bar{N}_{1}) into hyperon (antihyperon) also provide a frame work to study CP-odd observables in hyperon decays.

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