Searches for quark and lepton compositeness

Searches for quark and lepton compositeness
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搜索夸克和轻子复合性

DOI:
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发表时间:
2000
期刊:
影响因子:
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通讯作者:
K. Hikasa
K. Hikasa
中科院分区:
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文献类型:
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作者:
K. Hagiwara;K. Hikasa

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91.1接触相互作用的极限如果夸克和轻子是由组分组成的,那么在组分结合能的尺度(复合尺度)上,它们之间应该出现新的相互作用。在远低于复合尺度(Λ)的能量下,这些相互作用被Λ的逆幂抑制。费米子复合性的主要影响应该来自与四个费米子的最低维相互作用(接触项),其最一般的味对角色单重手征不变形式为[1,2] L = LLL + LRR + LLR + LRL,
91.1 Limits on contact interactions If quarks and leptons are made of constituents, then at the scale of constituent binding energies (compositeness scale) there should appear new interactions among them. At energies much below the compositeness scale (Λ), these interactions are suppressed by inverse powers of Λ. The dominant effect of the compositeness of fermion ψ should come from the lowest dimensional interactions with four fermions (contact terms), whose most general flavor-diagonal color-singlet chirally invariant form reads [1, 2] L = LLL + LRR + LLR + LRL,