Parity Doublets in Quark Physics
نویسندگان
چکیده
منابع مشابه
Parity mixed doublets in A=36 nuclei.
The γ-circular polarizations (Pγ) and asymmetries (Aγ) of the parity forbidden M1 + E2 γ-decays: 36Cl∗(Jπ = 2;T = 1;Ex = 1.95 MeV) → 36Cl(Jπ = 2+;T = 1; g.s.) and 36Ar∗(Jπ = 2;T = 0;Ex = 4.97 MeV) → 36Ar∗(Jπ = 2+;T = 0;Ex = 1.97 MeV) are investigated theoretically. We use the recently proposed Warburton-Becker-Brown shell-model interaction. For the weak forces we discuss comparatively different...
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Physics of the low-lying and high-lying hadrons in the light flavors sector is reviewed. While the low-lying hadrons are strongly affected by both U(1) A and spontaneous SU(2) L × SU(2) R breakings, in the high-lying hadrons these symmetries are restored. A manifestation is a persistence of the chiral multiplet structure in both baryon and meson spectra. A fundamental origin of this phenomenon ...
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Possible interference phenomena between parity doublets are discussed. In particular, the decay particle distributions of Z+ and A' produced in E +p capture and in x +p collision are analyzed. These distributions may have interference terms with odd parity. Experimental detection of such terms would constitute an unambiguous proof of the existence of parity doublets. It is further pointed out t...
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It is argued that an appearance of the near parity doublets in the upper part of the light baryon spectrum is an evidence for the chiral symmetry restoration in the regime where a typical momentum of quarks is around the chiral symmetry breaking scale. Thus one observes a phase transition in the upper part of the light baryon spectrum. The average kinetic energy of the constituent quarks in thi...
متن کاملNearby Doorways, Parity Doublets and Parity Mixing in Compound Nuclear States
We discuss the implications of a doorway state model for parity mixing in compound nuclear states. We argue that in order to explain the tendency of parity violating asymmetries measured in 233Th to have a common sign, doorways that contribute to parity mixing must be found in the same energy neighbourhood of the measured resonance. The mechanism of parity mixing in this case of nearby doorways...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 1997
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.78.13