Comparison of nuclear Hamiltonians using spectral function sum rules
نویسندگان
چکیده
منابع مشابه
Spectral Sum Rules and Selberg's Integral Formula
Using Selberg's integral formula we derive all Leutwyler-Smilga type sum rules for one and two flavors, and for each of the three chiral random matrix ensembles. In agreement with arguments from effective field theory, all sum rules for N f = 1 coincide for the three ensembles. The connection between spectral correlations and the low-energy effective partition function is discussed.
متن کاملDuality violations and spectral sum rules
We study the issue of duality violations in the V V −AA vacuum polarization function in the chiral limit. This is done with the help of a model with an expansion in inverse powers of the number of colors, Nc, allowing us to consider resonances with a finite width. Due to these duality violations, the Operator Product Expansion (OPE) and the moments of the spectral function (e.g. the Weinberg su...
متن کاملElectromagnetic Emission Rates and Spectral Sum Rules ∗
The electromagnetic emission rates at SPS energies satisfy spectral constraints in leading order in the pion and nucleon densities. These constraints follow from the strictures of broken chiral symmetry. We saturate these constraints using available data, leading to model independent emission rates from a hadronic gas. With a simple fire-ball scenario, only large nucleon densities may account f...
متن کاملNuclear Polarizabilities and Logarithmic Sum Rules
The electric polarizability and logarithmic mean-excitation energy are calculated for the deuteron using techniques introduced in atomic physics. These results are then used to improve limits on the atomic-deuterium frequency shift due to nuclear polarization in the unretarded dipole limit, as well as confirming previous results.
متن کاملSpectral asymmetries in nucleon sum rules at finite density.
Apparent inconsistencies between different formulations of nucleon sum rules at finite density are resolved through a proper accounting of asymmetries in the spectral functions between positiveand negative-energy states. PACS number(s): 24.85+p, 21.65.+f, 12.38.Lg Typeset using REVTEX
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 C
سال: 2017
ISSN: 2469-9985,2469-9993
DOI: 10.1103/physrevc.96.014003