Tests of Lorentz and CPT symmetry with hadrons and nuclei
| Autor: | J. P. Noordmans |
|---|---|
| Přispěvatelé: | Grzadkowski, B, Kalinowski, J, Krawczyk, M |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Quantum chromodynamics
Physics Antiparticle Particle physics History CPT symmetry 010308 nuclear & particles physics Violation Lorentz transformation Hadron High Energy Physics::Phenomenology Nuclear Theory Chiral perturbation-theory 01 natural sciences Computer Science Applications Education symbols.namesake Quantum electrodynamics Effective lagrangian 0103 physical sciences symbols Hamiltonian (quantum mechanics) 010306 general physics Nuclear Experiment Model |
| Popis: | We apply chiral-perturbation-theory techniques to the QCD sector of the Lorentz and CPT violating standard-model extension. We derive the effective Lagrangian in terms of pions and nucleons for a selected set of dimension-five operators involving quarks and gluons. This derivation is based on chiral-symmetry properties of the operators, as well as on their behaviour under C,P, and T transformations. We consider the power counting rules and apply the heavy-baryon approach to account for the large nucleon mass. Having obtained the relevant Lorentz-violating contributions to the pion-nucleon Lagrangian, we proceed to derive the particle and anti-particle Hamiltonian, from which we obtain the Lorentz-violating contribution to comagnetometer experiments. This allows us to place stringent limits on some of the parameters. For some other parameters we find that the best bounds will come from nucleon nucleon interactions, and we derive the relevant nucleon-nucleon potential. These considerations imply possible new opportunities for spin-precession experiments involving for example the deuteron. Portuguese Foundation for Science and Technology (FCT) [SFRH/BPD/101403/2014]; program POPH/FSE |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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