Light-Front Holography and Gauge/Gravity Duality: The Light Meson and Baryon Spectra
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- 作者：Guy F. de Té ; ramond ; Stanley J. Brodsky
- 刊名：Nuclear Physics B - Proceedings Supplements
- 出版年：2010
- 出版时间：February 2010
- 年：2010
- 卷：199
- 期：1
- 页码：89-96
- 全文大小：248 K
文摘
Starting from the bound state Hamiltonian equation of motion in QCD, we derive relativistic light-front wave equations in terms of an invariant impact variable ζ which measures the separation of the quark and gluonic constituents within the hadron at equal light-front time. These equations of motion in physical space-time are equivalent to the equations of motion which describe the propagation of spin-J modes in anti–de Sitter (AdS) space. Its eigenvalues give the hadronic spectrum, and its eigenmodes represent the probability amplitudes of the hadronic constituents at a given scale. An effective classical gravity description in a positive-sign dilaton background exp(+κ2z2) is given for the phenomenologically successful soft-wall model which naturally encodes the internal structure of hadrons and their orbital angular momentum. Applications to the light meson and baryon spectrum are presented.