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Fine structure of the P states in heavy quarkonium and the nature of the spin-dependent potential

Technical Report:

Abstract

The failure of existing theories to agree with the experimental measurements of the fine structure of the {Chi} states of the bb-bar and cc-bar systems is discussed. Various possible explanations, such as mixing of the 2P triplet with the 1F triplet are ruled out. The fact is used that the spin-independent potential is well-determined in the relevant range to extract accurate determinations of expectation values of the spin-dependent potentials, providing tests for future theories. It is found that the usual ansatz that the qq-bar interaction has effective vector and scalar contributions only is very unlikely to be sufficient to explain the fine structure of the {sup 3}P levels and to accommodate the recent measurement of the mass of the {sup 1}P state in charmonium. (author) 22 refs.; 3 figs.; 3 tabs.
Authors:
Publication Date:
Aug 01, 1992
Product Type:
Technical Report
Report Number:
LAPP-A-395-92
Reference Number:
SCA: 662230; PA: AIX-25:004150; EDB-94:015722; ERA-19:005636; NTS-94:014785; SN: 93001121082
Resource Relation:
Other Information: PBD: Aug 1992
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; QUARKONIUM; FINE STRUCTURE; P STATES; EXPECTATION VALUE; NUCLEAR POTENTIAL; SPIN; 662230; QUANTUM CHROMODYNAMICS
OSTI ID:
10109864
Research Organizations:
Grenoble-1 Univ., 74 - Annecy (France). Lab. de Physique des Particules Elementaires
Country of Origin:
France
Language:
English
Other Identifying Numbers:
Other: ON: DE94609666; TRN: FR9303122004150
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
FRN
Size:
14 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Franzini, P J. Fine structure of the P states in heavy quarkonium and the nature of the spin-dependent potential. France: N. p., 1992. Web.
Franzini, P J. Fine structure of the P states in heavy quarkonium and the nature of the spin-dependent potential. France.
Franzini, P J. 1992. "Fine structure of the P states in heavy quarkonium and the nature of the spin-dependent potential." France.
@misc{etde_10109864,
title = {Fine structure of the P states in heavy quarkonium and the nature of the spin-dependent potential}
author = {Franzini, P J}
abstractNote = {The failure of existing theories to agree with the experimental measurements of the fine structure of the {Chi} states of the bb-bar and cc-bar systems is discussed. Various possible explanations, such as mixing of the 2P triplet with the 1F triplet are ruled out. The fact is used that the spin-independent potential is well-determined in the relevant range to extract accurate determinations of expectation values of the spin-dependent potentials, providing tests for future theories. It is found that the usual ansatz that the qq-bar interaction has effective vector and scalar contributions only is very unlikely to be sufficient to explain the fine structure of the {sup 3}P levels and to accommodate the recent measurement of the mass of the {sup 1}P state in charmonium. (author) 22 refs.; 3 figs.; 3 tabs.}
place = {France}
year = {1992}
month = {Aug}
}