QCD sum rules study of the meson Z+ (4430)

Su Houng Lee, Antonio Mihara, Fernando S. Navarra, Marina Nielsen

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

We use QCD sum rules to study the recently observed meson Z+ (4430), considered as a D* D1 molecule with JP = 0-. We consider the contributions of condensates up to dimension eight and work at leading order in αs. We get mZ = (4.40 ± 0.10) GeV in a very good agreement with the experimental value. We also make predictions for the analogous mesons Zs and Zb b considered as Ds * D1 and B* B1 molecules, respectively. For Zs we predict mZs = (4.70 ± 0.06) GeV, which is above the Ds * D1 threshold, indicating that it is probably a very broad state and, therefore, difficult to observe experimentally. For Zb b we predict mZb b = (10.74 ± 0.12) GeV, in agreement with quark model predictions.

Original languageEnglish
Pages (from-to)28-32
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume661
Issue number1
DOIs
Publication statusPublished - 2008 Mar 1

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sum rules
mesons
quantum chromodynamics
predictions
quark models
condensates
molecules
thresholds

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Lee, Su Houng ; Mihara, Antonio ; Navarra, Fernando S. ; Nielsen, Marina. / QCD sum rules study of the meson Z+ (4430). In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2008 ; Vol. 661, No. 1. pp. 28-32.
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QCD sum rules study of the meson Z+ (4430). / Lee, Su Houng; Mihara, Antonio; Navarra, Fernando S.; Nielsen, Marina.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 661, No. 1, 01.03.2008, p. 28-32.

Research output: Contribution to journalArticle

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AU - Navarra, Fernando S.

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AB - We use QCD sum rules to study the recently observed meson Z+ (4430), considered as a D* D1 molecule with JP = 0-. We consider the contributions of condensates up to dimension eight and work at leading order in αs. We get mZ = (4.40 ± 0.10) GeV in a very good agreement with the experimental value. We also make predictions for the analogous mesons Zs and Zb b considered as Ds * D1 and B* B1 molecules, respectively. For Zs we predict mZs = (4.70 ± 0.06) GeV, which is above the Ds * D1 threshold, indicating that it is probably a very broad state and, therefore, difficult to observe experimentally. For Zb b we predict mZb b = (10.74 ± 0.12) GeV, in agreement with quark model predictions.

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