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Publikováno v:
Phys. Rev. C 89, 065801 (2014)
We explore the equation of state for nuclear matter in the quark-meson coupling model, including full Fock terms. The comparison with phenomenological constraints can be used to restrict the few additional parameters appearing in the Fock terms which
Externí odkaz:
http://arxiv.org/abs/1307.4166
In the light of the recent discovery of a neutron star with a mass accurately determined to be almost two solar masses, it has been suggested that hyperons cannot play a role in the equation of state of dense matter in $\beta$-equilibrium. We re-exam
Externí odkaz:
http://arxiv.org/abs/1204.2614
We investigate the influence of the spatial extent of the proton magnetization and charge densities on the 2S hyperfine splitting in muonic hydrogen. The use of a non-perturbative relativistic Dirac approach leads to corrections of 15% to values obta
Externí odkaz:
http://arxiv.org/abs/1108.5785
The measurement of the 2P^{F=2}_{3/2} to 2S^{F=1}_{1/2} transition in muonic hydrogen by Pohl et al. and subsequent analysis has led to the conclusion that the rms radius of the proton differs from the accepted (CODATA) value by approximately 4%, cor
Externí odkaz:
http://arxiv.org/abs/1108.2541
The measurement by Pohl et al. [1] of the 2S_1/2^F=1 to 2P_3/2^F=2 transition in muonic hydrogen and the subsequent analysis has led to a conclusion that the rms charge radius of the proton differs from the accepted (CODATA [2]) value by approximatel
Externí odkaz:
http://arxiv.org/abs/1105.2384
Publikováno v:
Phys. Rev. A84:012506,2011
We investigate the muonic hydrogen 2P^{F=2}_{3/2} to 2S^{F=1}_{1/2} transition through a precise, non-perturbative numerical solution of the Dirac equation including the finite-size Coulomb force and finite size vacuum polarization. The results are c
Externí odkaz:
http://arxiv.org/abs/1104.2971
We show that off-mass-shell effects arising from the internal structure of the proton provide a new proton polarization mechanism in the Lamb shift, proportional to the lepton mass to the fourth power. This effect is capable of resolving the current
Externí odkaz:
http://arxiv.org/abs/1101.4073
Autor:
Carroll, J. D.
Quantum Hadrodynamics provides a useful framework for investigating dense matter, yet it breaks down easily when strangeness carrying baryons are introduced into the calculations, as the baryon effective masses become negative due to large meson fiel
Externí odkaz:
http://arxiv.org/abs/1010.3759
Autor:
Carroll, J. D.
Publikováno v:
AIP Conf.Proc.1261:226-231,2010
We discuss the recent progress in calculating the properties of 'hybrid stars' (stellar objects similar to neutron stars, classified by the incorporation of non-nucleonic degrees of freedom, including but not limited to hyperons and/or a quark-matter
Externí odkaz:
http://arxiv.org/abs/1004.1217