Results 1 to 10 of about 13,224 (34)

Pion and Vector Meson Form Factors in the Kuperstein-Sonnenschein holographic model [PDF]

open access: yes, 2010
We study phenomenological aspects of the holographic model of chiral symmetry breaking recently introduced by Kuperstein and Sonnenschein (KS). As a first step, we calculate the spectrum of vector and axial-vector mesons in the KS model.
A Dymarsky   +38 more
core   +1 more source

Vector-Meson Electroproduction from Generalized Vector Dominance [PDF]

open access: yes, 1998
Including destructively interfering off-diagonal transitions of diffraction-dissociation type, we arrive at a formulation of GVD for exclusive vector-meson production in terms of a continuous spectral representation of dipole form.
Schildknecht, Dieter   +2 more
core   +2 more sources

Nuclear shadowing at low Q^2 [PDF]

open access: yes, 2003
We re-examine the role of vector meson dominance in nuclear shadowing at low Q^2. We find that models which incorporate both vector meson and partonic mechanisms are consistent with both the magnitude and the Q^2 slope of the shadowing data.Comment: 7 ...
A. Capella   +41 more
core   +3 more sources

Radiative decays of the Y(3940), Z(3930) and the X(4160) as dynamically generated resonances [PDF]

open access: yes, 2010
We study the radiative decay properties of the charmonium-like X, Y and Z mesons generated dynamically from vector meson-vector meson interaction in the framework of a unitarized hidden-gauge formalism.
Branz, Tanja   +2 more
core   +3 more sources

Non-Leptonic Decays of B Mesons and Strong Coupling Constants [PDF]

open access: yes, 1997
Non-leptonic decays of B mesons into two mesons or meson resonances are studied on the basis of two versions of simple pole-dominance models involving scalar, vector, pseudoscalar and axial-vector poles.
Ali A.   +30 more
core   +4 more sources

$\eta \to \pi^0 \gamma \gamma$ decay within unitarized chiral perturbation theory [PDF]

open access: yes, 2002
We improve the calculations of the $\eta \to \pi^0 \gamma \gamma$ decay within the context of meson chiral lagrangians. We use a chiral unitary approach for the meson-meson interaction, thus generating the $a_0(980)$ resonance and fixing the longstanding
A. A. Bel’kov   +48 more
core   +3 more sources

First measurement of coherent $\phi$-meson photoproduction on deuteron at low energies [PDF]

open access: yes, 2007
The cross section and decay angular distributions for the coherent \phi meson photoproduction on the deuteron have been measured for the first time up to a squared four-momentum transfer t =(p_{\gamma}-p_{\phi})^2 =-2 GeV^2/c^2, using the CLAS detector ...
Amaryan, M. J.   +211 more
core   +4 more sources

Vector meson dominance and the rho meson

open access: yes, 1998
We discuss the properties of vector mesons, in particular the rho^0, in the context of the Hidden Local Symmetry (HLS) model. This provides a unified framework to study several aspects of the low energy QCD sector.
A. Bernicha   +71 more
core   +2 more sources

Realizing vector meson dominance with transverse charge densities [PDF]

open access: yes, 2011
The transverse charge density in a fast-moving nucleon is represented as a dispersion integral of the imaginary part of the Dirac form factor in the timelike region (spectral function). At a given transverse distance b the integration effectively extends
C. Weiss   +4 more
core   +1 more source

Two-gluon coupling and collider phenomenology of color-octet technirho mesons [PDF]

open access: yes, 2001
It has recently been suggested that gauge invariance forbids the coupling of a massive color-octet vector meson to two gluons. While this is true for operators in an effective Lagrangian of dimension four or less, we demonstrate that dimension six ...
't Hooft   +40 more
core   +2 more sources

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