ar X iv : h ep - p h / 04 11 10 3 v 2 1 7 N ov 2 00 4 Chiral Soliton Model vs Pentaquark Structure for Θ ( 1540 )
نویسنده
چکیده
The exotic baryon Θ + (1540 MeV) is visualised as an expected (iso) rota-tional excitation in the Chiral Soliton Model. It is also argued as a Pentaquark baryon state in a constituent quark model with strong diquark correlations. I contrast the two points of view; observe the similarities and differences between the two pictures.
منابع مشابه
ar X iv : h ep - p h / 04 11 20 4 v 1 1 6 N ov 2 00 4 OU - HET - 501 Chiral - Odd Twist - 3 Distribution Function e ( x )
We clarify the nonperturbative origin of the δ-function singularity at x = 0 in the chiral-odd twist-3 distribution function e(x) of the nucleon. We also compare a theoretical prediction for e(x) based on the chiral quark soliton model with the empirical information extracted from the CLAS semi-inclusive DIS measurement.
متن کاملar X iv : h ep - p h / 05 04 27 3 v 2 1 2 Ju l 2 00 5 Magnetic moment of the pentaquark state Θ + ( 1540 )
In this article, we study the magnetic moment of the pentaquark Θ(1540) as (scalar)diquark-(pseudoscalar)diquark-antiquark state with the QCD sum rules approach in the external electromagnetic field. Due to the special structure of the interpolating current, only the electromagnetic interactions of the s quark with the external field have contributions to the magnetic moment with tensor structu...
متن کاملar X iv : h ep - p h / 05 04 27 3 v 1 2 8 A pr 2 00 5 Magnetic moment of the pentaquark state Θ + ( 1540 )
In this article, we study the magnetic moment of the pentaquark Θ(1540) as diquark-diquark-antiquark state with the QCD sum rules approach in the external electromagnetic field. Due to the special structure of the interpolating current, only the interactions of the s quark with the external electromagnetic field have contributions to the tensor structure σμν p̂+ p̂σμν . The numerical results indi...
متن کاملar X iv : h ep - e x / 04 03 02 0 v 1 1 2 M ar 2 00 4 Search for Θ + and Ξ − − 3 / 2 pentaquarks in HERA - B
A search for Θ + (1540) and Ξ −− 3/2 (1860) pentaquark candidates has been performed in proton-induced reactions on C, Ti and W targets at √ s = 41.6 GeV studying the pK 0 S resp. Ξ − π − and Ξ − π + (and charge conjugated (c.c.)) decay channels at mid-rapidity. With sensitivities of Br×dσ/dx F < 5 to 25 µb/nucleon, we find no evidence for narrow pentaquark peaks in any of the studied final sta...
متن کاملar X iv : h ep - p h / 04 02 07 9 v 1 7 F eb 2 00 4 UH – 511 – 1043 – 04 LBL – 54494 February 2004
If the narrow exotic baryon resonances Θ+(1540) and Ξ 3 2 (1862) are members of the JP = 12 + antidecuplet with N∗(1710), the octet-antidecuplet mixing is required not only by the mass spectrum but also by the decay pattern of N∗(1710). This casts doubt on validity of the Θ+ mass prediction by the chiral soliton model. While all pieces of the existing experimental information point to a small o...
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