The Ω and ΣΛ transition magnetic moment in QCD Sum Rules

نویسنده

  • Shi-lin Zhu
چکیده

The method of QCD sum rules in the presence of the external electromagnetic Fμν field is used to calculate the Ω magnetic moment μΩ and the Σ Λ transition magnetic moment μΣ0Λ, with the susceptibilities obtained previously from the study of octet baryon magnetic moments. The results μΩ = −1.92μN and μΣ0Λ = 1.5μN are in good agreement with the recent experimental data.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

The ΣΛ Transition Magnetic Moment in Light Cone QCD Sum Rules

Using the general form of the Σ and Λ currents, the ΣΛ transition magnetic moment is calculated in framework of the light cone QCD sum rules. A comparison of our result on this quantity with the existing theoretical results and experimental data is presented. PACS number(s): 11.55.Hx, 13.40.Em, 14.20.Jn e-mail: [email protected] e-mail: [email protected] e-mail: [email protected]

متن کامل

Magnetic moment of the ρ-meson in QCD sum rules

The magnetic moment μ of the ρ-meson is calculated in the framework of QCD sum rules in external fields. Bare loop calculations (parton model) give: μpart = 2.0. The contribution of operators of dimension 6 reduces this value: μ = 1.5± 0.3. ∗e-mail:[email protected]

متن کامل

Magnetic moment of the pentaquark Θ(1540) as diquark-diquark-antiquark state with QCD sum rules

In this article, we study the magnetic moment of the pentaquark state Θ+(1540) as diquark-diquark-antiquark ([ud][ud]s̄) state with the QCD sum rules in the external weak electromagnetic field (EFSR) and the light-cone QCD sum rules (LCSR) respectively. The numerical results indicate the magnetic moment is about μΘ+ = −(0.11 ± 0.02)μN for the EFSR and μΘ+ ≈ −(0.1−0.5)μN for the LCSR. As the valu...

متن کامل

Magnetic Moments of ∆ and Ω from QCD Sum Rules

QCD sum rules for the magnetic moments of ∆ and Ω− are derived using the external field method. They are analyzed by a Monte-Carlo based procedure, using realistic estimates of the QCD input parameters. The results are consistent with the measured values, despite relatively large errors that can be attributed mostly to the poorly-known vacuum susceptibility χ. It is shown that a 30% level accur...

متن کامل

Magnetic moment of the pentaquark Θ(1540) with QCD sum rules

In this article, we study the magnetic moment of the pentaquark state Θ+(1540) with the QCD sum rules approach in the external electromagnetic field. The numerical results indicate the magnetic moment of the pentaquark state Θ+(1540) is about μΘ+ = (0.24 ± 0.02)μN . PACS : 12.38.Aw, 12.38.Lg, 12.39.Ba, 12.39.-x

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2008