498 citations · 1.4k across the 18 of their papers we have counts for
18 papers
Quark-Hadron Duality
M. Shifman
I review the notion of the quark-hadron duality from the modern perspective. Both, the theoretical foundation and practical applications are discussed. The proper theoretical frame…
Chiral Symmetry Breaking without Bilinear Condensates, Unbroken Axial Z_N Symmetry, and Exact QCD Inequalities
Ian I. Kogan, Alex Kovner, M. A. Shifman
An alternative pattern of the chiral symmetry breaking, suggested recently by Stern, is investigated. It could be self-consistent provided that the chiral …
Heavy flavor decays, OPE and duality in two-Dimensional 't Hooft model
I. Bigi, M. Shifman, N. Uraltsev +1
The 't Hooft model (two-dimensional QCD in the limit of large number of colors) is used as a laboratory for exploring various aspects of the heavy quark expansions in the nonlepton…
High Power n of m_b in Beauty Widths and n=5 -> oo Limit
I. Bigi, M. Shifman, N. Uraltsev +1
The leading term in the semileptonic width of heavy flavor hadrons depends on the fifth power of the heavy quark mass. We present an analysis where this power can be self-consisten…
Aspects Of Heavy Quark Theory
I. Bigi, M. Shifman, N. Uraltsev
Recent achievements in the heavy quark theory are critically reviewed. The emphasis is put on those aspects which either did not attract enough attention or cause heated debates in…
Chiral Symmetry Breaking, Duality in the \bar{Q}q Channel and b -> c anti-c s Decays
B. Blok, M. Shifman, N. Uraltsev
We address the issue of the quark-hadron duality in the spectral densities induced by the heavy-light quark currents anti-Q q. In the limit m_Q ->oo, m_q ->0 we observe an enhancem…