scholarly journals Exclusive diffractive processes and the quark substructure of mesons

1997 ◽  
Vol 56 (3) ◽  
pp. 1644-1662 ◽  
Author(s):  
M. A. Pichowsky ◽  
T.-S. H. Lee
Keyword(s):  
Quark Substructure

scholarly journals Ternary SU(3)-group symmetry and its possible applications in hadron-quark substructure. Towards a new spinor-fermion structure

2019 ◽  
Vol 204 ◽  
pp. 02007
Author(s):  
Alexander Maslikov ◽  
Guennady Volkov
Keyword(s):  
Harmonic Functions ◽  
Complex Space ◽  
Group Symmetry ◽  
Complex Numbers ◽  
Spatial Properties ◽  
Laplace Equations ◽  
Quark Charge ◽  
Spinor Matter ◽  
Quark Substructure

The questions on the existence of the three color quark symmetry and three quark-lepton generations could have the origin associated with the new exotic symmetries outside the Cartan-Killing-Lie algebras/groups. Our long-term search for these symmetries has been began with our Calabi-Yau space classification on the basis of the n-ary algebra for the reflexive projective numbers and led us to the expansion of the binary n = 2 complex and hyper complex numbers in the framework of the n-ary complex and hyper-complex numbers with n = 3, 4, … where we constructed new Abelian and non-Abelian symmetries. We have studied then norm-division properties of the Abelian nary complex numbers and have built the infinite chain of the Abelian groups U(n–1) = [U(1) × … × U(1)](n–1). We have developed the n-ary holomorphic (polymorphic) analysis on the n-ary complex space NC{n}, which led us to the generalization of the quadratic Laplace equations for the harmonic functions. The generalized Laplace equations for the n-ary harmonic functions give us the n-th order homogeneous differential equations which are invariant with respect to the Abelian n-ary groups U(n–1) and with some new spatial properties. Further consideration of the non-Abelian n-ary hyper-complex numbers opens the infinite series of the non-Abelian TnSU(n)-Lie groups(n=3,4,…) and its corresponding tnsu(n) algebras. One of the exceptional features of these symmetry groups is the appearance of some new n-dimensional spinors that could lead to an extension of the concept of the SU(2)-spin, to the appearance of n-dimensional quantum structures -exotic “n-spinor” matter(n = 3, 4, … - maarcrions). It is natural to assume that these new exotic “quantum spinor states” could be candidates for the pra-matter of the quark-charge leptons or/and for the dark matter. We will be also interested in the detection of the exotic quantum ’n-spinor” matter in the neutrino and hadron experiments.

Photodisintegration of the deuteron

1984 ◽  
Vol 62 (11) ◽  
pp. 1072-1082 ◽  
Author(s):  
W-Y. P. Hwang
Keyword(s):  
Energy Transfer ◽  
Energy Region ◽  
Experimental Studies ◽  
Deuteron Photodisintegration ◽  
High Energies ◽  
Spin Observables ◽  
Intermediate Energies ◽  
Entire Energy ◽  
Quark Substructure ◽  
Major Emphasis

This paper examines those basic theoretical aspects that, in the author's opinion, are relevant for future experimental studies of deuteron photodisintegration, or its time-reversed reaction, at low, intermediate, and high energies. At low photon energies, i.e., [Formula: see text], theoretical aspects stressed by the various authors are contrasted and discussed. At intermediate energies, i.e., [Formula: see text], the major emphasis has to do with the importance of studying the role played by isobars [Δ(1232)], especially in sorting out effects related to substantial energy transfer to the baryonic system. At high energies, i.e., [Formula: see text], the prospect of unraveling manifestations of the quark substructure of hadrons is briefly discussed. For the entire energy region surveyed in this paper, [Formula: see text], it appears essential to measure spin observables so as to disentangle manifestations of the various important aspects relevant for the reaction.

Cosmic neutrino beams: Probes of lepton and quark substructure

1988 ◽  
Vol 38 (9) ◽  
pp. 2833-2840 ◽  
Author(s):  
G. Domokos ◽  
S. Kovesi-Domokos
Keyword(s):  
Cosmic Neutrino ◽  
Quark Substructure

NUCLEON ELECTROMAGNETIC FORM FACTORS AND CHIRAL SINGULARITIES

1999 ◽  
Vol 08 (04) ◽  
pp. 355-379
Author(s):  
C. D. JOHNSON ◽  
R. TEGEN
Keyword(s):  
Closed Form ◽  
Scattering Amplitude ◽  
Form Factors ◽  
Electromagnetic Form Factors ◽  
Threshold Behaviour ◽  
Gauge Invariant ◽  
Meson Loop ◽  
Loop Approximation ◽  
Quark Substructure

Chiral singularities in both nucleon isovector radii are calculated in closed form. Within a one-meson-loop approximation we implement in an explicitly gauge invariant manner quark substructure in the γ π π and πNN vertex functions. The coefficients of log mπ and [Formula: see text] terms are directly related to gA and to the threshold behaviour of the πN amplitude A(-)(ν,0) which are 1 and 0, respectively, if only the N pole is considered in the πN scattering amplitude. This result is remarkably independent of the cut-off procedure. If mesonic substructure at the γ π π vertex is included, however, gA becomes slightly smaller than 1 and [Formula: see text] becomes moderately negative. This hints at important contributions to both gA and [Formula: see text] from the Δ(1232) and possibly other N*, Δ* resonances in this approach.

SIGNAL OF QUARK SUBSTRUCTURE IN HADRONIC INTERACTIONS AT SMALL SCATTERING ANGLES

1995 ◽  
Vol 10 (03) ◽  
pp. 267-272 ◽  
Author(s):  
Z. CAO ◽  
Y. D. HE
Keyword(s):  
Standard Model ◽  
Contact Interaction ◽  
Cross Sections ◽  
Cosmic Ray ◽  
Family Data ◽  
Hadronic Interactions ◽  
Quark Substructure

We explore the possibility of searching for signals of quark substructure in hadronic interactions at small scattering angles. Incorporating the four-fermion contact interaction due to scatterings between constituents of quarks in the lowest order QCD formalism, we find a deviation in the jet inclusive cross-sections at small scattering angles from the prediction by standard model. This strategy can be used to look for the compositeness of quarks at 1016 eV by analyzing cosmic ray double-core γ-family data.

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