A. Gentil-Beccot, DESY Forschung Hochenergiephysik, S. Mele, A. Holtkamp, H.B. O'Connell, T.C. Brooks
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A. Gentil-Beccot, DESY Forschung Hochenergiephysik, S. Mele, A. Holtkamp, H.B. O'Connell, T.C. Brooks
Journal article
Benayoun, M., David, P., DelBuono, L., Leitner, O., O'Connell, H. B.
We readdress the problem of finding a simultaneous description of the pion form factor data in e+e- annihilations and in tau decays. For this purpose, we work in the framework of the Hidden Local...
Anomalous $\eta/\eta^\prime$ Decays: The Triangle and Box Anomalies (2003)
Benayoun, M., David, P., DelBuono, L., Leruste, Ph., O'Connell, H. B.
We examine the decay modes $\eta/\etp\ra \pi^+ \pi^- \gamma$ within the context of the Hidden Local Symmetry (HLS) Model. Using numerical information derived in previous fits to $VP\gamma$ and...
The Pion Form Factor Within the Hidden Local Symmetry Model (2003)
Benayoun, M., David, P., DelBuono, L., Leruste, Ph., O'Connell, H. B.
We analyze a pion form factor formulation which fulfills the Analyticity requirement within the Hidden Local Symmetry (HLS) Model. We show that it implies an $s$--dependent dressing of the...
Isospin Symmetry Breaking within the HLS Model: A Full ($\rho, \omega, \phi$) Mixing Scheme (2001)
Benayoun, M., O'Connell, H. B.
We study the way isospin symmetry violation can be generated within the Hidden Local Symmetry (HLS) Model. We show that isospin symmetry breaking effects on pseudoscalar mesons naturally induces...
Benayoun, M., DelBuono, L., Leruste, Ph., O'Connell, H. B.
We examine the mechanisms producing departures from ideal mixing for vector mesons within the context of the Hidden Local Symmetry (HLS) model. We show that kaon loop transitions between the ideal...
Radiative Decays, Nonet Symmetry and SU(3)Breaking (1999)
Benayoun, M., DelBuono, L., Eidelman, S., Ivanchenko, V N., O'Connell, H B.
VMD, the WZW Lagrangian and ChPT: The Third Mixing Angle (1999)
Benayoun, M., DelBuono, L., O'Connell, H. B.
We show that the Hidden Local Symmetry Model, supplemented with well-known procedures for breaking flavor SU(3) and nonet symmetry, provides all the information contained in the standard Chiral...
Radiative Decays, Nonet Symmetry and SU(3) Breaking (1999)
Benayoun, M., DelBuono, L., Eidelman, S., Ivanchenko, V. N., O'Connell, H. B.
We re-examine the problem of simultaneously describing in a consistent way all radiative and leptonic decays of light mesons (V -> P gamma, P -> V gamma, P -> gamma gamma, V -> e^+ e^-). For this...
New results in $\rho^0$ meson physics (1999)
Benayoun, M., Eidelman, S., Maltman, K., O'Connell, H B., Shwartz, B., Williams, A G.
Extracting Br(omega->pi^+ pi^-) from the Time-like Pion Form-factor (1998)
We extract the G-parity-violating branching ratio Br(omega->pi^+ pi^-) from the effective rho-omega mixing matrix element Pi_{rho omega}(s), determined from e^+e^- -> pi^+ pi^- data. The omega->pi^+...
Vector meson dominance and the rho meson (1998)
Benayoun, M., O'Connell, H. B., Williams, A. G.
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...
SU(3) breaking and Hidden Local Symmetry (1998)
Benayoun, M., O'Connell, H. B.
We study the various existing implementations of SU(3) breaking in the Hidden Local Symmetry model for the low energy hadronic sector following a mechanism originally proposed by Bando, Kugo and...
New results in rho^0 meson physics (1997)
Benayoun, M., Eidelman, S., Maltman, K., O'Connell, H. B., Shwartz, B., Williams, A. G.
We compare the predictions of a range of existing models based on the Vector Meson Dominance hypothesis with data on e^+ e^- -> pi^+ pi^$ and e^+ e^- -> mu^+ mu^- cross-sections and the phase and...
Rho-Omega Mixing and the Pion Form Factor in the Time-like Region (1997)
We determine the magnitude, phase, and $s$-dependence of $\rho$-$\omega$ ``mixing'' in the pion form factor in the time-like region through fits to $e^+e^- \ra \pi^+ \pi^-$ data. The associated...
On extracting the rho-omega mixing amplitude from the pion form-factor (1997)
Williams, A. G., O'Connell, H. B., Thomas, A. W.
In this paper we improve and extend a recent analysis which showed that the rho-omega mixing amplitude cannot be unambiguously extracted from the pion electromagnetic form-factor in a model...
Rho-Omega Mixing and Direct CP Violation in Hadronic B-Decays (1997)
Gardner, S., O'Connell, H. B., Thomas, A. W.
The extraction of CKM-matrix-element information from hadronic B-decays generally suffers from discrete ambiguities, hampering the diagnosis of physics beyond the Standard Model. We show that a...
Extracting the rho-omega mixing amplitude from the pion form-factor (1997)
O'Connell, H. B., Thomas, A. W., Williams, A. G.
We re-examine and extend a recent analysis which showed that the rho-omega mixing amplitude cannot be unambiguously extracted from the pion electromagnetic form-factor in a model independent way. In...
Analysis of rho-omega interference in the pion form-factor (1996)
Maltman, K., O'Connell, H. B., Williams, A. G.
The formalism underlying the analysis of e+e- -> pi+pi- in the rho-omega interference region is carefully revisited. We show that the standard neglect of the pure I=0 omega, omega_I, `direct''...
Vector Meson Mixing and Charge Symmetry Violation (1995)
O'Connell, H. B., Williams, A. G., Bracco, M., Krein, G.
We discuss the consistency of the traditional vector meson dominance (VMD) model for photons coupling to matter, with the vanishing of vector meson-meson and meson-photon mixing self-energies at...
Rho-omega Mixing and the Pion Electromagnetic Form-Factor (1995)
O'Connell, H. B., Pearce, B. C., Thomas, A. W., Williams, A. G.
The suggestion of momentum dependence in the amplitude for rho-omega mixing has generated concern over related implications for vector meson dominance and the photon-rho coupling. We discuss two...
Rho-omega mixing, vector meson dominance and the pion form-factor (1995)
O'Connell, H. B., Pearce, B. C., Thomas, A. W., Williams, A. G.
We review the current status of rho-omega mixing and discuss its implication for our understanding of charge-symmetry breaking. In order to place this work in context we also review the photon-hadron...
Constraints on the momentum dependence of rho-omega mixing (1994)
O'Connell, H. B., Pearce, B. C., Thomas, A. W., Williams, A. G.
Within a broad class of models we show that the amplitude for rho^0-omega mixing must vanish at the transition from timelike to spacelike four momentum. Hence in such models the mixing is either zero...