Octet baryon electromagnetic form factor double ratios $(G_E^{\ast }/G_M^{\ast })/(G_E/G_M)$ in a nuclear medium

Abstract

The ratios of the baryon electric ($G_E$) to magnetic ($G_M$) form factors, $G_E/G_M$, can provide us with important information on the structure of baryons in vacuum as demonstrated in recent studies for the proton and neutron systems. It has been argued that the corresponding in-medium ratios, $G_E^{\ast }/G_M^{\ast }$, can also provide useful information on the electromagnetic structure of baryons in a nuclear medium. Although the ratios may not be measured directly in experiments except for the proton at present, the double ratios $(G_E^{\ast }/G_M^{\ast })/(G_E/G_M)$ can be directly related to the polarization-transfer measurements of bound baryons. In the present work we estimate, for the first time, the double ratios $(G_E^{\ast }/G_M^{\ast })/(G_E/G_M)$ for all the members of octet baryons in symmetric nuclear matter in the range $Q^2=0$--3 GeV${}^2$, where $Q^2=-q^2$ with $q$ being the four-momentum transfer.

arXiv commentVersion published in Phys. Rev. D. The discussions are extended. 11 pages, 6 figures

References in corpus (31)

• Nucleon and hadron structure changes in the nuclear medium and impact on observables
• Studies of Nucleon Resonance Structure in Exclusive Meson Electroproduction
• Light Front Cloudy Bag Model: Nucleon Electromagnetic Form Factors
• Polarization transfer in the ${}^4$He$(\vec{e},e^{\prime }{\vec{p}}^3$H reaction
• The Role of Color Neutrality in Nuclear Physics--Modifications of Nucleonic Wave Functions
• Polarization Transfer in the 4He(e,e'p)3H Reaction at Q^2 = 0.8 and 1.3 (GeV/c)^2
• Electromagnetic form factors of the bound nucleon
• A pure S-wave covariant model for the nucleon
• A relativistic quark model for the Omega- electromagnetic form factors
• Octet baryon electromagnetic form factors in nuclear medium
• Valence quark contribution for the gamma N -> Delta quadrupole transition extracted from lattice QCD
• Octet baryon electromagnetic form factors in a relativistic quark model
• Strange Baryon Electromagnetic Form Factors and SU(3) Flavor Symmetry Breaking
• Nucleon and gamma N -> Delta lattice form factors in a constituent quark model
• Octet to decuplet electromagnetic transition in a relativistic quark model
• Chiral solitons in nuclei: Electromagnetic form factors
• Relativistic and Nuclear Medium Effects on the Coulomb Sum Rule
• Covariant nucleon wave function with S, D, and P-state components
• Extracting the Omega- electric quadrupole moment from lattice QCD data
• Using baryon octet magnetic moments and masses to fix the pion cloud contribution
• Neutron Properties in the Medium
• Medium modifications of nucleon electromagnetic form factors
• Axial form factors of the octet baryons in a covariant quark model
• Medium Modifications of Hadron Properties and Partonic Processes
• Spin and angular momentum in the nucleon
• Covariant spectator quark model description of the ${\gamma }^{\ast }\Lambda \to {\Sigma }^0$ transition
• Electromagnetic form factors of bound nucleons revisited
• $N^{\ast }$ Form Factors based on a Covariant Quark Model
• Study of the in-medium nucleon electromagnetic form factors using a light-front nucleon wave function combined with the quark-meson coupling model
• Medium Modification of the Proton Form Factor
• Properties of protons in nuclear medium with AdS/QCD model with a quadratic modified dilaton

Cited by in corpus (11)

• Electromagnetic Transition Form Factors of Baryon Resonances
• Hyperon electromagnetic timelike elastic form factors at large $q^2$
• Electromagnetic form factors of the ${\Omega }^{-}$ baryon in the spacelike and timelike regions
• Covariant model for the Dalitz decay of the $N(1535)$ resonance
• A covariant model for the decuplet to octet Dalitz decays
• Space-like Electromagnetic Form Factors of Lambda- and Sigma-Baryons from Quark-Diquark Faddeev Equations
• Weak interaction axial form factors of the octet baryons in nuclear medium
• Meson cloud contributions to the Dalitz decays of decuplet to octet baryons
• In-medium electromagnetic form factors of pseudoscalar mesons from the quark model
• Electroweak form factors of baryons in dense nuclear matter
• Quark model calculations of transition form factors at high photon virtualities