0 K + K − and the structure of f 0 ( 980 )
نویسنده
چکیده
We use light-cone QCD sum rules to evaluate the strong coupling gf0K+K− which enters in several analyses concerning the scalar f0(980) meson. The result: 6.2 ≤ gf0K+K− ≤ 7.8 GeV is larger than in previous determinations.
منابع مشابه
Coupling g f 0 K + K − and the structure of f 0 ( 980 )
We use light-cone QCD sum rules to evaluate the strong coupling gf0K+K− which enters in several analyses concerning the scalar f0(980) meson. The result: 6.2 ≤ gf0K+K− ≤ 7.8 GeV is larger than in previous determinations.
متن کاملProposed search for a(0)(0)(980)-f(0)(980) mixing in polarization phenomena.
The K+ and K0 meson mass difference induces the mixing of the a(0)(0)(980) and f(0)(980) resonances, the amplitude of which, between the K+K- and K0(-)K(0) thresholds, is large in magnitude, of the order of m(K)m(2)(K0)sqrt[-m(2)(K+)] approximately sqrt[alpha] m(2)(K), and possesses the phase sharply varying by about 90 degrees. We suggest performing the polarized target experiments on the reac...
متن کاملOn the coupling g f 0 K + K − and the structure of f 0 ( 980 )
We use light-cone QCD sum rules to evaluate the strong coupling gf0K+K− which enters in several analyses concerning the scalar f0(980) meson. The result is 6.2 ≤ gf0K+K− ≤ 7.8 GeV. PACS. 12.38.Lg – 13.75.Lb – 14.40.Cs
متن کاملar X iv : h ep - p h / 97 05 23 0 v 2 7 A pr 1 99 8 Structure of f 0 ( 980 ) from a Coupled Channel Analysis of S - wave ππ Scattering
A coupled channel model is used to study the nature of the f 0 (980) resonance. It is shown that the existence of two poles close to K ¯ K threshold, as found in many data fits and confirmed here, can be reconciled with the K ¯ K molecular origin of the f 0 (980). Due to a strong coupling between channels the number of the S-matrix poles close to the physical region in the physical case exceeds...
متن کاملStructure of f 0 ( 980 ) from a Coupled Channel Analysis of S - wave ππ Scattering
A coupled channel model is used to study the nature of the f 0 (980) resonance. It is shown that the existence of two poles close to K ¯ K threshold, as found in many data fits and confirmed here, can be reconciled with the K ¯ K molecular origin of the f 0 (980). Due to a strong coupling between channels the number of the S-matrix poles close to the physical region in the physical case exceeds...
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تاریخ انتشار 2003