Exotic Baryon Interpretation of a Narrow Mass Enhancement at 1360 MeV
نویسندگان
چکیده
منابع مشابه
Evidence for a narrow | S | = 1 baryon state at a mass of 1528 MeV in quasi - real photoproduction HERMES
Evidence for a narrow baryon state is found in quasi-real photoproduction on a deuterium target through the decay channel pK0 S → pπ+π−. A peak is observed in the pK0 S invariant mass spectrum at 1528 ± 2.6(stat) ± 2.1(syst) MeV. Depending on the background model, the naive statistical significance of the peak is 4–6 standard deviations and its width may be somewhat larger than the experimental...
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Narrow high-mass states can arise despite large phase space when two nearly degenerate states are coupled to the same dominant decay mode. Mixing via a final-state interaction loop diagram can produce one very broad state and one narrow state. Such a situation is generic in exotic hadrons where a color singlet with given flavor and spin quantum numbers can be constructed with two distinct inter...
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We generalize the usual octet, decuplet and exotic antidecuplet and higher baryon multiplets to any number of colours Nc. We show that the multiplets fall into a sequence of bands with O(1/Nc) splittings inside the band and O(1) splittings between the bands characterized by “exoticness”, that is the number of extra quark-antiquark pairs needed to compose the multiplet. Each time one adds a pair...
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We outline how one can understand the Skyrme model from the modern perspective. We review the quantization of the SU(3) rotations of the Skyrmion, leading to the exotic baryons that cannot be made of three quarks. It is shown that in the limit of large number of colours the lowest-mass exotic baryons can be studied from the kaon-Skyrmion scattering amplitudes, an approach known after Callan and...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1977
ISSN: 0033-068X,1347-4081
DOI: 10.1143/ptp.58.1047