论文标题
轻型前近的重型重子的轻夸克腐烂
Light quark decays of doubly heavy baryons in light front approach
论文作者
论文摘要
We explore the semileptonic and nonleptonic decays of doubly heavy baryons $(Ω_{cc}^ {(*) +}, Ω_{bb}^ {(*)0}, Ω_{bc}^ {(*) -}, Ω_{bc}^ {\prime 0}) $ induced by the $s\to u$ transition. HADRONIC形态因子通过过渡矩阵元素参数化，并在光前夸克模型中计算出来。通过形式因素，我们利用螺旋性幅度并分析了双重重的重子的半卵巢和非肠道衰变模式。得出了部分衰减宽度，分支分数，前后不对称和其他现象学可观察物的基准结果。我们发现，半衰减衰减的典型分支分数为$ \ ell \barν$的订单$ 10^ {-7} -10^ {-8} $，非法律衰减的订单是$ 10^ {-5} $的订单，可能在LHCB实验中可检测到。随着将来积累的潜在数据，我们的结果可能有助于在存在两个重夸克的情况下塑造我们对衰减机制的理解。
We explore the semileptonic and nonleptonic decays of doubly heavy baryons $(Ω_{cc}^ {(*) +}, Ω_{bb}^ {(*)0}, Ω_{bc}^ {(*) -}, Ω_{bc}^ {\prime 0}) $ induced by the $s\to u$ transition. Hadronic form factors are parametrized by transition matrix elements and are calculated in the light front quark model. With the form factors, we make use of helicity amplitudes and analyze semileptonic and nonleptonic decay modes of doubly heavy baryons. Benchmark results for partial decay widths, branching fractions, forward-backward asymmetries and other phenomenological observables are derived. We find that typical branching fractions for semileptonic decays into $\ell\barν$ are at the order $10^ {-7}-10^ {-8} $ and the ones for nonleptonic decays are at the order $10^ {-5} $, which are likely detectable such as in LHCb experiment. With the potential data accumulated in future, our results may help to shape our understanding of the decay mechanism in the presence of two heavy quarks.
