Determination of the Λ magnetic moment by QCD sum rules

Pasupathy, J. ; Singh, J. P. ; Wilson, S. L. ; Chiu, C. B. (1987) Determination of the Λ magnetic moment by QCD sum rules Physical Review D - Particles, Fields, Gravitation and Cosmology, 36 (5). pp. 1442-1450. ISSN 1550-7998

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The magnetic moment of the Λ hyperon is calculated using the QCD sum-rule approach of Ioffe and Smilga. It is shown that μ Λ has the structure μ Λ =(2/3(eu+ed+4es)(eh/2MΛ c)(1+δ Λ), where δ Λ is small. In deriving the sum rules special attention is paid to the strange-quark mass-dependent terms and to several additional terms not considered in earlier works. These terms are now appropriately incorporated. The sum rule is analyzed using the ratio method. Using the external-field-induced susceptibilities determined earlier, we find that the calculated value of μ Λ is in agreement with experiment.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:58066
Deposited On:31 Aug 2011 12:38
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