☆ 4.7 Article

Analysis of the Y(4140) and related molecular states with QCD sum rules

EUROPEAN PHYSICAL JOURNAL C (2009)

期刊

EUROPEAN PHYSICAL JOURNAL C

卷 64, 期 3, 页码 373-386

出版社

SPRINGER

DOI: 10.1140/epjc/s10052-009-1156-2

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类别

Physics, Particles & Fields

资金

National Natural Science Foundation of China [10775051]
New Century Excellent Talents in University [NCET-07-0282]

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Protocol

Reagent

摘要

In this article, we assume that there exist scalar D*(D) over bar*, D*(s)(D) over bar*(s), B*(B) over bar* and B*(s)(B) over bar*(s) molecular states, and study their masses using the QCD sum rules. The numerical results indicate that the masses are about (250-500) MeV above the corresponding D*-(D) over bar*, D*(s)-(D) over bar*(s), B*-(B) over bar* and B*(s)-(B) over bar*(s) thresholds, the Y(4140) is unlikely a scalar D*(s)(D) over bar*(s) molecular state. The scalar D*(D) over bar*, D*(s)(D) over bar*(s), B*(B) over bar* and B*(s)(B) over bar*(s) molecular states maybe not exist, while the scalar D'*(D) over bar'*, D'*(s)(D) over bar'*(s), B'*(B) over bar'* and B'*(s)(B) over bar'*(s) molecular states maybe exist.

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