0000000000115389
AUTHOR
Juan-luis Domenech-garret
QQ-onia package: a numerical solution to the Schrodinger radial equation for heavy quarkonium
30 pages, 3 figures.-- ISI article identifier:000265158700009.-- ArXiv pre-print avaible at: http://arxiv.org/abs/0805.2704
Spectroscopy, leptonic decays and the nature of heavy quarkonia
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.
Cosmological analogies in the search for new physics in high-energy collisions
In this paper, analogies between multiparticle production in high-energy collisions and the time evolution of the early universe are discussed. A common explanation is put forward under the assumption of an unconventional early state: a rapidly expanding universe before recombination (last scattering surface), followed by the CMB, later evolving up to present days, versus the formation of hidden/dark states in hadronic collisions followed by a conventional QCD parton shower yielding final-state particles. In particular, long-range angular correlations are considered pointing out deep connections between the two physical cases potentially useful for the discovery of new physics.
QQ-onia package: a numerical solution to the Schrödinger radial equation for heavy quarkonium
Abstract This paper presents the basics of the QQ-onia package, a software based upon the Numerov O (h^6 ) method which can be used to solve the Schrödinger radial equation using a suitable potential V (r) for the heavy quarkonium system. This package also allows the analysis of relevant properties of those resonances such as the square of the wave functions at the origin, their corresponding derivatives for l ≠ 0 states, typical heavy-quark velocities, and mean square radii. Besides, it includes a to... Title of program: QQ-onia package Catalogue Id: AECQ_v1_0 Nature of problem Software to solve the Schrödinger radial equation using a suitable potential V (r) for the heavy quarkonium syste…