Spectroscopy, leptonic decays and the nature of heavy quarkonia

6533b850fe1ef96bd12a845e

RESEARCH PRODUCT

Spectroscopy, leptonic decays and the nature of heavy quarkonia

Miguel-angel Sanchis-lozano Juan-luis Domenech-garret

subject

Quantum chromodynamics Physics Particle physics Nuclear and High Energy Physics High Energy Physics::Lattice High Energy Physics::Phenomenology Lattice field theory Radiative decay FOS: Physical sciences Resonance Física Quarkonium Nuclear physics High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph)Strong coupling Radiative transfer High Energy Physics::Experiment Spectroscopy

description

We examine the electronic width ratios of Upsilon resonances below the BBbar threshold by means of an effective (Cornell-type) QCD potential incorporating 1/m_b corrections obtained from a prior fit to the bottomonium spectrum. From our analysis we conclude that the Upsilon(2S) and Upsilon(3S) states should belong to the strong-coupling (nonperturbative) regime while the Upsilon(1S) state should belong to the weak-coupling (perturbative) regime, in agreement with a previous study based on radiative decays.

year	journal	country	edition	language
2008-05-19	Physics Letters B

10.1016/j.physletb.2008.09.021 http://dx.doi.org/10.1016/j.physletb.2008.09.021

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