منابع مشابه
EXOTIC cc̄ MESONS
A surprising number of new c¯ c mesons with masses above the D ¯ D threshold have been discovered at the B factories. Some of them are ordinary charmonium states, but others are definitely exotic mesons. The current theoretical status of the new c¯ c mesons is summarized. 1. New c¯ c mesons The discovery of charmonium in November 1974 marked the beginning of the modern era of particle physics. ...
متن کاملExotic Mesons, Theory and Experiment *
In this talk I summarize the status of exotic mesons, including both theoretical expectations and experimental candidates. The current experimental candidates are " spin-parity exotics " ; since these are most often considered possible hybrid mesons, the theoretical discussion will be mainly concerned with hybrids. The exotic meson candidates discussed are the surprisingly light π 1 (1400) and ...
متن کاملPentaquark implications for Exotic mesons
If the exotic baryon Θ(1540) is a correlated ududs̄ with J = 1 2 + , then there should exist an exotic meson, J = 1− θ(S = +2) → KK ∼ 1.6GeV with width O(10−100)MeV. The π1(1400; 1600) may be broad members of 10 ± 10 in such a picture. Vector mesons in the 1.4 1.7GeV mass range are also compared with this picture. e-mail: [email protected] e-mail:[email protected] e-mail:[email protected]
متن کاملDiquark model of exotic mesons
This is a conference mostly devoted to diquarks. Although an exotic meson can in principle be composed of a diquark and an antidiquark, such an exotic is unlikely to be experimentally observable in the near future. The reason, according to the model, is that diquark-antidiquark exotics have masses well above the threshold for decay into two mesons, and are likely to have widths too large to mak...
متن کاملScalar Mesons within a model for all non-exotic mesons
We describe a four-parameter model for non-exotic meson-meson scattering, which accommodates all non-exotic mesons, hence also the light scalar mesons, as resonances and bound states characterised by complex singularities of the scattering amplitude as a function of the total invariant mass. The majority of the full S-matrix mesonic poles stem from an underlying confinement spectrum. However, t...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1978
ISSN: 0556-2821
DOI: 10.1103/physrevd.18.3453