scholarly journals Parity-doublet structure in the La9057147 nucleus

2017 ◽  
Vol 96 (6) ◽  
Author(s):  
J. Wiśniewski ◽  
W. Urban ◽  
T. Rząca-Urban ◽  
A. G. Smith ◽  
J. F. Smith ◽  
...  
Keyword(s):  
Parity Doublet ◽  
Doublet Structure

scholarly journals SKYRMIONS, SPECTRAL FLOW AND PARITY DOUBLES

1999 ◽  
Vol 14 (03) ◽  
pp. 445-461 ◽  
Author(s):  
A. P. BALACHANDRAN ◽  
SACHINDEO VAIDYA
Keyword(s):  
Degrees Of Freedom ◽  
Index Theorem ◽  
Baryon Number ◽  
Low Energy ◽  
Light Nuclei ◽  
Spectral Flow ◽  
Winding Number ◽  
Parity Doublet ◽  
Doublet Structure ◽  
Topological Interaction

It is well-known that the winding number of the Skyrmion can be identified as the baryon number. We show in this paper that this result can also be established using the Atiyah–Singer index theorem and spectral flow arguments. We argue that this proof suggests that there are light quarks moving in the field of the Skyrmion. We then show that if these light degrees of freedom are averaged out, the low energy excitations of the Skyrmion are in fact spinorial. A natural consequence of our approach is the prediction of a [Formula: see text] state and its excitations in addition to the nucleon and delta. Using the recent numerical evidence for the existence of Skyrmions with discrete spatial symmetries, we further suggest that the the low energy spectrum of many light nuclei may possess a parity doublet structure arising from a subtle topological interaction between the slow Skyrmion and the fast quarks. We also present tentative experimental evidence supporting our arguments.

scholarly journals Study of parity-doublet structure in the 147La nucleus

2018 ◽  
Vol 193 ◽  
pp. 05006
Author(s):  
J. Wiśniewski ◽  
W. Urban ◽  
T. Rząca-Urban ◽  
A. G. Smith ◽  
J. F. Smith ◽  
...  
Keyword(s):  
Excited States ◽  
Ground State ◽  
Spontaneous Fission ◽  
Parity Doublet ◽  
Excitation Scheme ◽  
Spin Parity ◽  
Octupole Deformation ◽  
Doublet Structure ◽  
Γ Ray ◽  
Recent Evaluation

The work reports several new excited states in the neutron-rich 147La nucleus, populated in spontaneous fission of 252Cf. The excitation scheme has been reinvestigated by means of γ-ray spectroscopy, using high-fold γ coincidences measured with the Gammasphere array of Ge detectors. It is shown that the 229.65-keV level has spin and parity 11/2-, which changes the 9/2- spin-parity reported in a recent evaluation and sets up the spinparity of the ground state as 5/2+. New levels allow to arrange the excitation scheme of 147La into a parity-doublet-like structure showing that the 147La nucleus may have an octupole deformation.

Doublet structure of nonspecular x-ray scattering from multilayers

1992 ◽  
Vol 46 (4) ◽  
pp. 2481-2485 ◽  
Author(s):  
B. Lai ◽  
W. B. Yun ◽  
J. Chrzas ◽  
P. J. Viccaro
Keyword(s):  
X Ray ◽  
Doublet Structure ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals POLARIZATION VECTORS AND DOUBLET STRUCTURE IN PLANAR FIELD THEORY

2001 ◽  
Vol 16 (24) ◽  
pp. 3967-3988 ◽  
Author(s):  
RABIN BANERJEE ◽  
BISWAJIT CHAKRABORTY ◽  
TOMY SCARIA
Keyword(s):  
Field Theory ◽  
Doublet Structure ◽  
Lagrangian And Hamiltonian Formalisms ◽  
Chern Simons ◽  
Dual Models

We establish the equivalence of the Maxwell–Chern–Simons–Proca model to a doublet of Maxwell–Chern–Simons models defined in a variety of covariant gauges. This equivalence is shown to hold at the level of polarization vectors of the basic fields. The analysis is done in both Lagrangian and Hamiltonian formalisms and compatible results are obtained. A similar equivalence with a doublet of self and anti-self dual models is briefly discussed.

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