Baryons in AdS/QCD
Baryons in AdS/QCD
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DOI：
10.1016/j.physletb.2007.01.030
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发表时间：
2006-09
影响因子：
4.4
通讯作者：
D. Hong;T. Inami;Ho-Ung Yee
中科院分区：
文献类型：
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作者：
D. Hong;T. Inami;Ho-Ung Yee
在充分考虑手性对称性破缺影响的情况下，我们建立了AdS/QCD背景下重子的全息模型，研究了自旋-12的核子谱及其与介子的耦合。引入一对5D旋量来表示左手性和右手性。我们的模型包含两个可调参数，即红外截止和体旋量与体标量的汤川耦合，对应于手性对称的阶参量。以最低的核子质量为输入，计算了受激核子的质谱和核子与介子的耦合。被激发的核子在较小的介子-核子耦合下表现出奇偶加倍模式。
We construct a holographic model for baryons in the context of AdS/QCD and study the spin-12 nucleon spectra and its couplings to mesons, taking full account of the effects from the chiral symmetry breaking. A pair of 5D spinors is introduced to represent both left and right chiralities. Our model contains two adjustable parameters, the infrared cutoff and the Yukawa coupling of bulk spinors to bulk scalars, corresponding to the order parameter of chiral symmetry. Taking the lowest-lying nucleon mass as an input, we calculate the mass spectrum of excited nucleons and the nucleon couplings to pions. The excited nucleons show a parity-doubling pattern with smaller pion–nucleon couplings.