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Phys. Rev. D 67, 014025 (2003) [8 pages]

Improved determination of the mass of the 1-+ light hybrid meson from QCD sum rules

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H. Y. Jin
Institute of Modern Physics, Zhejiang University, People’s Republic of China
Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5E2

J. G. Körner
Institut für Physik, Johannes Gutenberg–Universität, D-55099 Mainz, Germany

T. G. Steele
Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5E2

Received 19 November 2002; published 30 January 2003

We calculate the next-to-leading order (NLO) αs corrections to the contributions of the condensates 〈αG2〉 and 〈q̅ q〉2 in the current-current correlator of the hybrid current gq̅ (x)γνiFμνaTaq(x) using the external field method in the Feynman gauge. After incorporating these NLO contributions into the Laplace sum rules, the mass of the JPC=1-+ light hybrid meson is recalculated using the QCD sum rule approach. We find that the sum rules exhibit enhanced stability when the NLO αs corrections are included in the sum rule analysis, resulting in a 1-+ light hybrid meson mass of approximately 1.6 GeV.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.67.014025
DOI:
10.1103/PhysRevD.67.014025
PACS:
14.40.Cs, 12.38.-t
 
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