$$N^*$$ N ∗ form Factors Based on a Covariant Quark Model
نویسندگان
چکیده
منابع مشابه
Nucleon Form Factors in a Covariant Diquark – Quark Model †
In a model where constituent quarks and diquarks interact through quark exchange the Bethe–Salpeter equation in ladder approximation for the nucleon is solved. Quark and diquark confinement is effectively parametrized by choosing appropriately modified propagators. The coupling to external currents is implemented via nontrivial vertex functions for quarks and diquarks to ensure gauge invariance...
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The nucleon is described as a bound state of a quark and an extended diquark. Hereby the notion “diquark” refers to the modelling of separable correlations in the two–quark Green’s functions. Binding of quarks and diquarks takes place via an exchange interaction and is therefore related to the Pauli principle for three– quark states. Fully Poincaré covariant nucleon amplitudes are calculated fo...
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We treat baryons as bound states of scalar or axialvector diquarks and a constituent quark which interact through quark exchange. This description results as an approximation to the relativistic Faddeev equation for three quarks which yields an effective Bethe-Salpeter equation. Octet and decuplet masses and fully fourdimensional wave functions have been computed for two cases: assuming an esse...
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15 صفحه اولForm factors of SU(N) invariant Thirring model
We obtain a new integral formula for solutions of the rational quantum Knizhnik-Zamolodchikov equation associated with Lie algebra slN at level zero. Our formula contains the integral representation of form factors of SU(N) invariant Thirring model constructed by F. Smirnov. We write down recurrence relations arising from the construction of the form factors. We check that the recurrence relati...
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ژورنال
عنوان ژورنال: Few-Body Systems
سال: 2018
ISSN: 0177-7963,1432-5411
DOI: 10.1007/s00601-018-1412-9