Violation of an f -sum rule with generalized kinetic energy
نویسندگان
چکیده
منابع مشابه
On Reconciling Gottfried Sum Rule Violation with Cabibbo Theory†
We discuss the seemingly contradictory constraints of simultaneously preserving the SU(3)-symmetric Cabibbo description of the weak vector baryon matrix elements, accounting for SU(3) flavor symmetry breaking and describing the observed violation of the Gottfried Sum Rule. We try to construct a simple model that will satisfy these constraints and use it to explain the generic difficulties and t...
متن کاملAn Uncertainty Principle for Fermions with Generalized Kinetic Energy
We derive semiclassical upper bounds for the number of bound states and the sum of negative eigenvalues of the one-particle Hamiltonians h = f ( ~ ) + V(x), acting on L2(N"). These bounds are then used N to derive a lower bound on the kinetic energy ~ ( q ~ , f ( i V y ) 0 ) for an j = l N-fermion wavefunction ~. We discuss two examples in more detail: f(P) = ]P[ and f(p) = (p2 + m2)1/2 _ m, bo...
متن کاملApparent violation of the conductivity sum rule in certain superconductors
It is pointed out that the Ferrell-Glover-Tinkham sum rule relating the "missing area" in the low frequency conductivity to the penetration depth can be violated in certain superconductors.. Its breakdown indicates that the effective mass of the carriers changes in entering the superconducting state, and implies a change in the conductivity at frequencies much higher than the superconducting ga...
متن کاملA Sum Rule Approach to the Violation of Dashen’s Theorem
A classic sum rule by Das et al. is extended to seven of the low-energy constants Ki, introduced by Urech, which parameterize electromagnetic corrections at chiral order O(ep). Using the spurion formalism, a simple convolution representation is shown to hold and the structure in terms of the chiral renormalization scale, the QCD renormalization scale and the QED gauge parameter is displayed. Th...
متن کاملQCD Sum-Rule Calculation of the Kinetic Energy and Chromo-Interaction of Heavy Quarks Inside Mesons
We present a QCD sum-rule determination of the heavy-quark kinetic energy inside a heavy meson, −λ1/2mQ, which is consistent with the fieldtheory analog of the virial theorem. We obtain −λ1 ≈ (0.10± 0.05) GeV, significantly smaller than a previous sum-rule result, but in good agreement with recent determinations from the analysis of inclusive decays. We also present a new determination of the c...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 2017
ISSN: 2469-9950,2469-9969
DOI: 10.1103/physrevb.95.195118