Magnetic field dependence of nucleon parameters from QCD sum rules
| Autor: | Marcelo Loewe, Luis Hernández, Cristian Villavicencio, Cesareo A. Dominguez, R. Zamora |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
Quantum chromodynamics Particle physics QCD sum rules Nuclear Theory High Energy Physics::Lattice High Energy Physics::Phenomenology Hadron FOS: Physical sciences Charge (physics) Coupling (probability) Computer Science::Digital Libraries Nuclear Theory (nucl-th) High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) High Energy Physics::Experiment Continuum (set theory) Nuclear Experiment Nucleon Energy (signal processing) |
| Zdroj: | Physical Review |
| ISSN: | 2470-0029 2470-0010 |
| Popis: | Finite energy QCD sum rules involving nucleon current correlators are used to determine several QCD and hadronic parameters in the presence of an external, uniform, large magnetic field. The continuum hadronic threshold $s_0$, nucleon mass $m_N$, current-nucleon coupling $\lambda_N$, transverse velocity $v_\perp$, the spin polarization condensate $\langle\bar q\sigma_{12} q\rangle$, and the magnetic susceptibility of the quark condensate $\chi_q$, are obtained for the case of protons and neutrons. Due to the magnetic field, and charge asymmetry of light quarks up and down, all the obtained quantities evolve differently with the magnetic field, for each nucleon or quark flavor. With this approach it is possible to obtain the evolution of the above parameters up to a magnetic field strength $eB < 1.4$ GeV$^2$. Comment: Note added in proof. Accepted for publication in Phys. Rev. D |
| Databáze: | OpenAIRE |
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