Hou W S, Soni A
Department of Physics, National Taiwan University, Taipei, Taiwan 10764, Republic of China.
Phys Rev Lett. 2001 May 7;86(19):4247-50. doi: 10.1103/PhysRevLett.86.4247.
We point out new ways to search for charmless baryonic B decays and suggest that enhanced baryon production is favored by reduced energy release on the baryon side. Thus B-->eta(')+baryon pairs might be larger than Kpi/pipi modes; the argument may be extended to B-->gamma+X(s), and perhaps to lnu+X(u). Guess estimates give some branching ratios in the 10(-3)- 10(-6) range, with confidence gained from the recent observation of B-->D()pn, D()pppi not far below D()pi and D()rho rates. Observation of modes proposed here would help clarify the dynamics of weak decays involving baryons, while the self-analyzing prowess of Lambda decay can be helpful in CP- and T-violation studies.
我们指出了寻找无粲重子B衰变的新方法,并表明重子产生的增强受到重子侧能量释放减少的青睐。因此,B→η(')+重子对的衰变分支比可能大于Kπ/ππ模式;这一论点可以扩展到B→γ+X(s),甚至可能扩展到lν+X(u)。初步估计给出了一些在10^(-3)-10^(-6)范围内的分支比,近期对B→D()pn、D()ppπ且其速率不比重子D()π和D()ρ低太多的观测结果增加了我们的信心。对本文提出的衰变模式的观测将有助于阐明涉及重子的弱衰变动力学,而Λ衰变的自分析能力在CP和T破坏研究中可能会有所帮助。