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Title: Heavy Quark Hadrons and Exotics a challenge for QCD

Abstract

Exotic hadrons with heavy quarks can confirm in the same multiquark system that the qq-bar interaction is much stronger than the qq interaction and produces color structures totally different from those of normal hadrons. Unusual heavy tetraquark structure may explain unusual properties of newly discovered mesons like the X(3872). Both charged and neutral B decays produce this narrow neutral resonant state that decays to both J/{psi}{rho} and J/{psi}{omega}, while no charged resonances in the same multiplet are found. This suggests that the X is an isoscalar resonance whose production conserves isospin, while isospin is violated only in the decay by an electromagnetic interaction allowing the isospin-forbidden J/{psi}{rho} decay. New data for X production in B decays provide a separation between production and decay, sharpen several experimental puzzles and impose serious constraints on all models. A proposed isoscalar tetraquark model agrees with all present data, conserves isospin in its production and breaks isospin only in an electromagnetic X(3872)J/{psi}{rho}{sup o} decay. The narrow X decay width results from the tiny phase space available for the J/{psi}{omega} decay and enables competition with the electromagnetic isospin-forbidden J/{psi}{rho} decay which has much larger phase space. Experimental tests are proposed for this isospin production invariance.

Authors:
 [1];  [2]
  1. Department of Particle Physics, Weizmann Institute of Science, Rehovot 76100 (Israel) and High Energy Physics Division, Argonne National Laboratory, Argonne, IL 60439-4815 (United States)
  2. Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv (Israel)
Publication Date:
OSTI Identifier:
21611930
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1388; Journal Issue: 1; Conference: BARYONS' 10: International conference on the structure of baryons, Osaka (Japan), 7-11 Dec 2010; Other Information: DOI: 10.1063/1.3647404; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; B QUARKS; C QUARKS; COLOR MODEL; ELECTROMAGNETIC INTERACTIONS; ISOSPIN; J PSI-3097 MESONS; NEUTRAL CURRENTS; OMEGA-782 MESONS; PARTICLE DECAY; PARTICLE WIDTHS; PHASE SPACE; QUANTUM CHROMODYNAMICS; RHO-770 MESONS; STRONG INTERACTIONS; SYMMETRY BREAKING; T QUARKS; ALGEBRAIC CURRENTS; BASIC INTERACTIONS; BEAUTY PARTICLES; BOSONS; CHARM PARTICLES; CHARMONIUM; COMPOSITE MODELS; CURRENTS; DECAY; ELEMENTARY PARTICLES; FERMIONS; FIELD THEORIES; HADRONS; INTERACTIONS; MATHEMATICAL MODELS; MATHEMATICAL SPACE; MESONS; PARTICLE MODELS; PARTICLE PROPERTIES; POSTULATED PARTICLES; QUANTUM FIELD THEORY; QUARK MODEL; QUARKONIUM; QUARKS; SPACE; TOP PARTICLES; VECTOR MESONS

Citation Formats

Lipkin, Harry J, and Karliner, Marek. Heavy Quark Hadrons and Exotics a challenge for QCD. United States: N. p., 2011. Web. doi:10.1063/1.3647404.
Lipkin, Harry J, & Karliner, Marek. Heavy Quark Hadrons and Exotics a challenge for QCD. United States. doi:10.1063/1.3647404.
Lipkin, Harry J, and Karliner, Marek. Fri . "Heavy Quark Hadrons and Exotics a challenge for QCD". United States. doi:10.1063/1.3647404.
@article{osti_21611930,
title = {Heavy Quark Hadrons and Exotics a challenge for QCD},
author = {Lipkin, Harry J and Karliner, Marek},
abstractNote = {Exotic hadrons with heavy quarks can confirm in the same multiquark system that the qq-bar interaction is much stronger than the qq interaction and produces color structures totally different from those of normal hadrons. Unusual heavy tetraquark structure may explain unusual properties of newly discovered mesons like the X(3872). Both charged and neutral B decays produce this narrow neutral resonant state that decays to both J/{psi}{rho} and J/{psi}{omega}, while no charged resonances in the same multiplet are found. This suggests that the X is an isoscalar resonance whose production conserves isospin, while isospin is violated only in the decay by an electromagnetic interaction allowing the isospin-forbidden J/{psi}{rho} decay. New data for X production in B decays provide a separation between production and decay, sharpen several experimental puzzles and impose serious constraints on all models. A proposed isoscalar tetraquark model agrees with all present data, conserves isospin in its production and breaks isospin only in an electromagnetic X(3872)J/{psi}{rho}{sup o} decay. The narrow X decay width results from the tiny phase space available for the J/{psi}{omega} decay and enables competition with the electromagnetic isospin-forbidden J/{psi}{rho} decay which has much larger phase space. Experimental tests are proposed for this isospin production invariance.},
doi = {10.1063/1.3647404},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1388,
place = {United States},
year = {2011},
month = {10}
}