Parametrization of flavor mixing in the standard model
Parametrization of flavor mixing in the standard model
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DOI：
10.1103/physrevd.57.594
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发表时间：
1997-08
影响因子：
5
通讯作者：
H. Fritzsch;Z. Xing
中科院分区：
文献类型：
--
作者：
H. Fritzsch;Z. Xing
结果表明，在标准的六夸克电弱理论中，存在九种不同的方法来描述味道混合，包括三个旋转角和一个违反CP的位相。对于复杂相的分配，如果允许相出现在混合矩阵的四个以上元素中，则基本上存在一个可能性的连续体。如果相位被限制为四个元素，则相位分配是唯一定义的。如果在u夸克和d夸克的质量被关闭的手征极限中施加限制，要求相位以自然的方式消失，那么九种参数化中只有三种是可接受的。特别是，不允许使用粒子数据组倡导的{OPEN_QUOTES}标准{CLOSE_QUOTES}参数化。其中，破坏CP的相位被限制在轻夸克扇区的一种参数化法是对味道混合最有利的描述。{版权所有}{ITAL 1997}{ITAL The American Physitive Society}
It is shown that there exist nine different ways to describe the flavor mixing, in terms of three rotation angles and one CP-violating phase, within the standard electroweak theory of six quarks. For the assignment of the complex phase there essentially exists a continuum of possibilities, if one allows the phase to appear in more than four elements of the mixing matrix. If the phase is restricted to four elements, the phase assignment is uniquely defined. If one imposes the constraint that the phase disappears in a natural way in the chiral limit in which the masses of the u and d quarks are turned off, only three of the nine parametrizations are acceptable. In particular the {open_quotes}standard{close_quotes} parametrization advocated by the Particle Data Group is not permitted. One parametrization, in which the CP-violating phase is restricted to the light quark sector, stands up as the most favorable description of the flavor mixing. {copyright} {ital 1997} {ital The American Physical Society}