SU(3) model for octet baryon and meson fragmentation
SU(3) model for octet baryon and meson fragmentation
复制标题
八重子和介子碎裂的 SU(3) 模型
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
Anubha Rastogi
中科院分区：
文献类型：
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作者：
D. Indumathi;H. S. Mani;Anubha Rastogi
基于SU(3)对称性的考虑和破碎函数中SU(3)对称性破缺的一个简单模型，分析了${e}^{{+}}{e}^{ensuremath{-}}$碰撞中重子和介子八元体的产生。所有的碎片函数${D}_{q}^{h}{(x, q}^{2}),$描述夸克分裂成重子八元组的一个成员（以及类似的分裂成介子八元组的成员）都用三个SU(3)对称函数来表示，$ $ensuremath{alpha}{(x, q}^{2}),$ $ensuremath{eta}{(x, q}^{2}),$和$ensuremath{gamma}{（x, q}^{2}）。通过引入SU(3)破缺参数ensuremath{lambda}，该模型成功地描述了Z极点的产油数据。然后利用阶演化方程对碎片函数进行演化，得到了与现有数据在涉及光子和${Z}^{0}$交换的不同能量下的良好拟合。
The production of the octet of baryons and mesons in ${e}^{+}{e}^{ensuremath{-}}$ collisions is analyzed, based on considerations of SU(3) symmetry and a simple model for SU(3) symmetry breaking in fragmentation functions. All fragmentation functions, ${D}_{q}^{h}{(x,Q}^{2}),$ describing the fragmentation of quarks into a member of the baryon octet (and similarly for fragmentation into members of the meson octet) are expressed in terms of three SU(3) symmetric functions, $ensuremath{alpha}{(x,Q}^{2}),$ $ensuremath{eta}{(x,Q}^{2}),$ and $ensuremath{gamma}{(x,Q}^{2}).$ With the introduction of an SU(3) breaking parameter, ensuremath{lambda}, the model is successful in describing hadroproduction data at the $Z$ pole. The fragmentation functions are then evolved using leading order evolution equations and good fits to currently available data at various energies involving both photon and ${Z}^{0}$ exchange are obtained.