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Showing 2015 · hep-phShow all

10 papers · 2 filters

hep-ph2015★ 13 cited

Matching lightcone- and anomaly-sum-rule predictions for the pion-photon transition form factor

A. G. Oganesian, A. V. Pimikov, N. G. Stefanis +1

The pion-photon transition form factor is studied by employing two types of Sum Rules: Light Cone Sum Rules (LCSR) and Anomaly Sum Rules (ASR). By comparing the predictions for the…

hep-ph2015★ 81 cited

Narrow Nucleon- Bound State and LHCb Pentaquarks

Michael I. Eides, Victor Yu. Petrov, Maxim V. Polyakov

We interpret the newly discovered pentaquark as a bound state of charmonium and the nucleon. The binding potential is due to charmonium-nucleon interaction that…

hep-ph2015★ 31 cited

Resonances in QCD

Matthias F. M. Lutz, Jens Sören Lange, Michael Pennington +22

We report on the EMMI Rapid Reaction Task Force meeting 'Resonances in QCD', which took place at GSI October 12-14, 2015. A group of 26 people met to discuss the physics of resonan…

hep-ph2015★ 1 cited

Baryon chiral perturbation theory extended beyond the low-energy region

E. Epelbaum, J. Gegelia, Ulf-G. Meißner +1

We consider an extension of the one-nucleon sector of baryon chiral perturbation theory beyond the low-energy region. The applicability of this approach for higher energies is rest…

hep-ph2015★ 5 cited

New fixed points of the renormalisation group for two-body scattering

M. C. Birse, E. Epelbaum, J. Gegelia

We outline a separable matrix ansatz for the potentials in effective field theories of nonrelativistic two-body systems with short-range interactions. We use this ansatz to constru…

hep-ph2015★ 28 cited

Binding energy of the at unphysical pion masses

V. Baru, E. Epelbaum, A. A. Filin +2

Chiral extrapolation of the binding energy is investigated using the modified Weinberg formulation of chiral effective field theory for the scattering. Give…

hep-ph2015★ 9 cited

Complex-mass renormalization in hadronic EFT: applicability at two-loop order

D. Djukanovic, E. Epelbaum, J. Gegelia +2

We discuss the application of the complex-mass scheme to multi-loop diagrams in hadronic effective field theory by considering as an example a two-loop self-energy diagram. We show…

hep-ph2015★ 30 cited

Chimera distribution amplitudes for the pion and the longitudinally polarized -meson

N. G. Stefanis, A. V. Pimikov

Using QCD sum rules with nonlocal condensates, we show that the distribution amplitude of the longitudinally polarized -meson may have a shorttailed platykurtic profile in close…

hep-ph2015★ 4 cited

Heavy quark mass expansion of vector and tensor currents and intrinsic charm in nucleon form factors

M. V. Polyakov, J. Sieverding

The framework of the expansion by subgraphs is used to compute asymptotic expansions for the vector and the tensor currents in the limit of large quark masses. We use the results t…

hep-ph2015★ 53 cited

Remarks on the study of the X(3872) from Effective Field Theory with Pion-Exchange Interaction

V. Baru, E. Epelbaum, A. A. Filin +5

In a recent paper Phys.Rev.Lett. 111, 042002 (2013) (arXiv:1304.0846), the charmonium state X(3872) is studied in the framework of an effective field theory. In that work it is cla…