On the electromagnetic form factors of mesons and baryons

Journal Article · Wed Aug 01 04:00:00 EDT 1962 · Nuovo Cimento

DOI:https://doi.org/10.1007/BF02733691· OSTI ID:4797065

Dallaporta, N.; Santis, V.

An extension of the model for the form factors of nucleons is proposed for all mesons and baryons, according to the following assumptions: 4-dimensional rotational invariance in isospace for the K interactions, and ordinary charge independence of pi interactions for all baryon doublets; occurrence of the coupling between the photon and the elementary particles considered only through bipion (T = 1, J = 1) and tripion (T = 0, J = 1) intermediate states; and suggested invariance under G transformation for all bipion and tripion interactions with the elementary particles considered. With these assumptions, Clementel-Villi type formulas for the form factors are obtained, whose constants are normalized on the minimum necessary number of the experimental charge values. The static limit of the for mulas may then be used to predict all other charge states form pions, K mesons and baryons, thus yielding a partial justification of the Gell-Mann relation between charge, isospin, and hypercharge. Some further consequences of the model and comparison with an eight-fold way'' model are discussed.

• Research Organization: Universita, Padua; and Istituto Nazionale di Fisica Nucleare, Padua
• Sponsoring Organization: USDOE
• NSA Number: NSA-16-027971
• OSTI ID: 4797065
• Journal Information: Nuovo Cimento, Journal Name: Nuovo Cimento Journal Issue: 3 Vol. 25; ISSN 0029-6341
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
ELECTRIC CHARGES
ELECTROMAGNETISM
FIELD THEORY
FORM FACTOR
GAUGE INVARIANCE
GELL-MANN THEORY
HYPERCHARGE
HYPERONS
INTERACTIONS
ISOSPIN
KAONS
MESONS
NUCLEONS
PHOTONS
PIONS