Wein, Philipp and Schaefer, Andreas (2015) Model-independent calculation of SU(3)(f) violation in baryon octet light-cone distribution amplitudes. JOURNAL OF HIGH ENERGY PHYSICS (5): 073. ISSN 1029-8479,
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In this work we present a minimal parametrization of the light-cone distribution amplitudes of the baryon octet including higher twist contributions. Simultaneously we obtain the quark mass dependence of the amplitudes at leading one-loop accuracy by the use of three-flavor baryon chiral perturbation theory (BChPT), which automatically yields model-independent results for the leading SU(3) flavor breaking effects. For that purpose we have constructed the nonlocal light-cone three-quark operators in terms of baryon octet and meson fields and have carried out a next-to-leading order BChPT calculation. We were able to find a minimal set of distribution amplitudes (DAs) that do not mix under chiral extrapolation towards the physical point and naturally embed the A baryon. Additionally they are chosen in such a way that all DAs of a certain symmetry class have a similar quark mass dependence (independent of the twist of the corresponding amplitude), which allows for a compact presentation. The results are well-suited for the extrapolation of lattice data and for model building.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CHIRAL PERTURBATION-THEORY; TWIST DISTRIBUTION AMPLITUDES; LAMBDA; NUCLEON; DECAY; QCD; Higher Twist Effects; Effective field theories; Chiral Lagrangians |
| Subjects: | 500 Science > 530 Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 15 Jul 2019 08:59 |
| Last Modified: | 15 Jul 2019 08:59 |
| URI: | https://pred.uni-regensburg.de/id/eprint/5501 |
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