Nuclear Axial Currents from Scale-Chiral Effective Field Theory
| Autor: | Mannque Rho, Yong-Liang Ma, Yan-Ling Li |
|---|---|
| Přispěvatelé: | Institut de Physique Théorique - UMR CNRS 3681 (IPHT), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Nuclear and High Energy Physics
Nuclear Theory [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th] Quantum Monte Carlo QCD vacuum quenching FOS: Physical sciences 01 natural sciences Nuclear Theory (nucl-th) High Energy Physics - Phenomenology (hep-ph) effective field theory Local symmetry Double beta decay Quantum mechanics 0103 physical sciences Effective field theory 010306 general physics Nuclear Experiment Instrumentation Physics operator: transition 010308 nuclear & particles physics Operator (physics) nuclear matter: density double-beta decay Astronomy and Astrophysics perturbation theory: chiral quantum chromodynamics: vacuum state Symmetry (physics) current: axial Baryon High Energy Physics - Phenomenology [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] symmetry: local pi: decay constant numerical calculations: Monte Carlo light nucleus |
| Zdroj: | Chin.Phys.C Chin.Phys.C, 2018, 42 (9), pp.094102. ⟨10.1088/1674-1137/42/9/094102⟩ |
| DOI: | 10.1088/1674-1137/42/9/094102⟩ |
| Popis: | By incorporating hidden scale symmetry and hidden local symmetry in nuclear effective field theory, combined with double soft-pion theorem, we predict that the Gamow-Teller operator coming from the space component of the axial current should remain unaffected by the QCD vacuum change caused by baryonic density whereas the first forbidden beta transition operator coming from the time component should be strongly enhanced. While the latter has been confirmed since some time, the former is given a support by a powerful recent {\it ab initio} quantum Monte Carlo calculation in light nuclei, also confirming the old "chiral filter hypothesis." Formulated in terms of Fermi-liquid fixed point structure of strong-coupled nuclear interactions, we offer an extremely simple resolution to the long-standing puzzle of "quenched $g_A$", $g_A^{\rm eff}\approx 1$~\cite{quenched}, in nuclear Gamow-Teller beta transitions, giant Gamow-Teller resonances and double beta decays. More discussions are added. Several typos are corrected |
| Databáze: | OpenAIRE |
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