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- L Li, C Eng, R J Desnick, J German, N A Ellis
- Molecular genetics and metabolism
- 1998

Bloom syndrome is more common in individuals of Ashkenazi Jewish descent than in any other population, and one particular mutation in the Bloom syndrome gene, blmAsh, is homozygous in nearly all Ashkenazi Jewish persons with Bloom syndrome. We have determined the frequency of blmAsh in 1491 Ashkenazi Jewish persons with no known history of Bloom syndrome… (More)

- Ling-Fong Li
- 2000

In this introductory lecture, some basic features of the spontaneous symmetry breaking are discussed. More specifically, σ-model, non-linear realization, and some examples of spontaneous symmetry breaking in the non-relativistic system are discussed in details. The approach here is more pedagogical than rigorous and the purpose is to get some simple… (More)

- GAUGE THEORIES, T. P. Cheng, E. Eichten, Ling-Fong Li
- 1974

We examine in detail the possibility of using the Higgs mechanism to remove the catastrophic infrared singularities in non-Abe&n gauge theories which are symptotically free. Our investigation encompasses theories based on SU(N) or O(N) with scalars in one vector, two vector, M vector, adjoint, tensor and adjoint plus one vector representations. We find that… (More)

- T. P. Cheng, Ling-Fong Li
- 2001

One way to detect the presence of new particles in theories beyond the standard model is through their contribution to electroweak loop effects. We comment on the importance of a consistent inclusion of their mixing angles to ensure that the physical requirement of heavy particle decoupling is fulfilled. We illustrate our points by a detailed discussion of… (More)

- Ling-Fong Li, T. P. Cheng
- 1997

After a pedagogical review of the simple constituent quark model and deep inelastic sum rules, we describe how a quark sea as produced by the emission of internal Goldstone bosons by the valence quarks can account for the observed features of proton spin and flavor structures. Some issues concerning the strange quark content of the nucleon are also… (More)

- Ling-Fong Li
- 2008

Spontanous symmetry breaking usually gives spin 0 Goldstone bosons for the case of internal symmetries and spin 1/2 fermions for the supersymmetry. The spontaneous breaking of higher dimensional Lorentz symmetry can give vector Goldstone boson in 4-dimension.

- L. Lavoura, Ling-Fong Li
- 1993

We compute the oblique parameters, including the three new parameters V , W and X introduced recently by the Montreal group, for the case of one scalar multiplet of arbitrary weak isospin J and weak hypercharge Y . We show that, when the masses of the heaviest and lightest components of the multiplet remain constant, but J increases, the oblique parameter U… (More)

- T. P. Cheng, Ling-Fong Li
- 1998

A whole class of non-perturbative QCD studies (e.g. the instanton models, chiral quark models, etc.) indicates that the effective degrees of freedom for the physics in the low Q . 1GeV 2 region could be the constituent quarks(CQs) and internal Goldstone bosons (IGBs). This leads to a nucleon structure with the spin being carried by three constituent quark… (More)

- GROUPTHEORYOFTHE SPONTANEOUSLY, BROKEN GAUGE SYMMETRIES, Ling-Fong Li
- 1973

The patterns of symmetry breaking in the gauge theories are investigated systematically in the general rotation groups and unitary groups, with Higgs scalars in the various representations up to second rank tensors. The occurrences of the fermion mass relations and pseudo-Goldstone bosons are also discussed in various cases. (Submitted to Phys. Rev.) * Work… (More)

- Ling-Fong Li
- 2008

The possibility that higher dimensional field theories are broken spontaneously, through the usual Nambu-Goldstone mechanism, to 4dimension is explored. As a consequence, vector Goldstone bosons can arise in this breaking of Lorentzian symmetry from higher dimension to 4-dimension. This can provide a simple mechanism for reduction to 4-dimension in theories… (More)