Isospin splittings in the decuplet baryon spectrum from dynamical QCD + QED
| Autor: | Roger Horsley, Ross D. Young, Dirk Pleiter, Yoshifumi Nakamura, James Zanotti, Z. Koumi, H. Stüben, Holger Perlt, Gerrit Schierholz, Paul E.L. Rakow, Arwed Schiller |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Quark
Nuclear and High Energy Physics Particle physics electromagnetic [effect] Octet splitting clover [fermion] High Energy Physics::Lattice Nuclear Theory Wilson [quark] FOS: Physical sciences hep-lat 01 natural sciences High Energy Physics - Lattice quantum chromodynamics 0103 physical sciences quantum electrodynamics ddc:530 numerical calculations 010306 general physics lattice Physics Quantum chromodynamics decuplet [baryon] 010308 nuclear & particles physics hadron spectroscopy Spectrum (functional analysis) High Energy Physics - Lattice (hep-lat) High Energy Physics::Phenomenology symmetry breaking [isospin] mass dependence [quark] SU(3) [flavor] 3. Good health Baryon Isospin multiplet [SU(2)] octet [baryon] |
| Zdroj: | Journal of physics / G G, Nuclear and particle physics 46(11), 115004-(2019). doi:10.1088/1361-6471/ab32c1 Horsley, R, Koumi, Z, Nakamura, Y, Perlt, H, Pleiter, D, Rakow, P E L, Schierholz, G, Schiller, A, Stüben, H, Young, R D & Zanotti, J M 2019, ' Isospin splittings in the decuplet baryon spectrum from dynamical QCD+QED ', Journal of Physics G: Nuclear and Particle Physics . https://doi.org/10.1088/1361-6471/ab32c1 JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS Journal of physics / G 46(11), 115004-(2019). doi:10.1088/1361-6471/ab32c1 |
| DOI: | 10.3204/PUBDB-2019-02097 |
| Popis: | We report a new analysis of the isospin splittings within the decuplet baryon spectrum. Our numerical results are based upon five ensembles of dynamical QCD+QED lattices. The analysis is carried out within a flavour-breaking expansion which encodes the effects of breaking the quark masses and electromagnetic charges away from an approximate SU(3) symmetric point. The results display total isospin splittings within the approximate SU(2) multiplets that are compatible with phenomenological estimates. Further, new insight is gained into these splittings by separating the contributions arising from strong and electromagnetic effects. We also present an update of earlier results on the octet baryon spectrum. 17 pages, 7 tables, 5 figures. Version accepted for publication in J.Phys.G |
| Databáze: | OpenAIRE |
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