Multiquark states and QCD sum rules

نویسنده

  • Seungho Choe
چکیده

There have been arguments about hadronic molecules, which are weakly-bound states of two or more hadrons. We investigate the possibility of some candidates (f0(980), a0(980), f0(1500), f0(1710), etc.) using QCD sum rule approach and compare our results with multiquark states in the MIT bag model. We find that f0(1500), f0(1710) can be good candidates for vector-vector molecule-type multiquark states.

برای دانلود رایگان 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

1 99 9 Multiquark picture for Σ ( 1620 )

In this work we report on a new QCD sum rule analysis to predict masses of the excited baryon states (e.g. Σ (1620) and Λ (1405)) by using multiquark interpolating fields ((qq̄)(qqq)). For the Σ (1620) we consider the K̄N , πΣ, and πΛ (I=1) multiquark interpolating fields. The calculated mass from those multiquark states is about 1.592 GeV. For the Λ (1405) we first show the result using the π+Σ−...

متن کامل

ar X iv : n uc l - th / 9 80 80 44 v 1 1 7 A ug 1 99 8 Multiquark picture for Σ ( 1620 )

In the QCD sum rule approach we predict the Σ (1620) mass by considering the K̄N , πΣ, and πΛ multiquark interpolating fields (I=1). The predicted mass is about 1.592 GeV. We also obtain 1.424 GeV as the Λ (1405) mass from the πΣ+πΣ+πΣ multiquark state (I=0), and compare this with our previous result from the πΣ multiquark state. On the other hand, the mass from the K̄N multiquark state (I=0) is ...

متن کامل

0 ( 2317 ) as a tetraquark state with QCD sum rules in heavy quark limit

In this article, we take the point of view that the charmed scalar meson Ds0(2317) be a tetraquark state and devote to calculate its mass within the framework of the QCD sum rules approach in the heavy quark limit. The numerical values for the mass of the Ds0(2317) are consistent with the experimental data, there must be some tetraquark component in the scalar meson Ds0(2317). Detailed discussi...

متن کامل

v 2 2 5 M ar 2 00 6 D s 0 ( 2317 ) as a tetraquark state with QCD sum rules in heavy quark limit

In this article, we take the point of view that the charmed scalar meson Ds0(2317) be a tetraquark state and devote to calculate its mass within the framework of the QCD sum rules approach in the heavy quark limit. The numerical values for the mass of the Ds0(2317) are consistent with the experimental data, there must be some tetraquark component in the scalar meson Ds0(2317). Detailed discussi...

متن کامل

Mass spectrum of the vector hidden charmed and bottomed tetraquark states

The Babar, Belle, CLEO, D0, CDF and FOCUS collaborations have discovered (or confirmed) a large number of charmonium-like states X(3940), X(3872), Y (4260), Y (4008), Y (3940), Y (4325), Y (4360), Y (4660), etc, and revitalized the interest in the spectroscopy of the charmonium states [1, 2, 3, 4]. Many possible assignments for those states have been suggested, such as multiquark states (whethe...

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

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2008