Decay through a doorway state and the puzzle ofTa180

2014 ◽  
Vol 90 (3) ◽  
Author(s):  
Naftali Auerbach ◽  
Vladimir Zelevinsky
Keyword(s):  
Doorway State

Polarized neutron capture intoC13: Evidence for a secondary doorway state effect

1984 ◽  
Vol 29 (4) ◽  
pp. 1186-1193 ◽  
Author(s):  
J. G. Woodworth ◽  
R. A. August ◽  
N. R. Roberson ◽  
D. R. Tilley ◽  
H. R. Weller ◽  
...  
Keyword(s):  
Neutron Capture ◽  
State Effect ◽  
Doorway State ◽  
Polarized Neutron

FERMION-SECTOR FRUSTRATED SU(4) AS A PREONIC PRECURSOR OF THE STANDARD MODEL

1999 ◽  
Vol 14 (12) ◽  
pp. 1911-1934 ◽  
Author(s):  
STEPHEN L. ADLER
Keyword(s):  
Weak Interactions ◽  
Group Analysis ◽  
Algebra Structure ◽  
Color Singlet ◽  
Composite Fermions ◽  
Renormalization Group Analysis ◽  
Gauge Algebra ◽  
Composite Higgs ◽  
Fermionic Sector ◽  
Doorway State

We give a model for composite quarks and leptons based on the semisimple gauge group SU(4), with the preons in the 10 representation; this choice of gauge gluon and preon multiplets is motivated by the possibility of embedding them in an N=6 supergravity multiplet, with the preons and antipreons both in the 20 of SU(6). Hypercolor singlets are forbidden in the fermionic sector of this theory; we propose that the SU(4) symmetry spontaneously breaks to SU (3)× U (1), with the binding of triality nonzero preons and gluons into composites, and with the formation of a color singlet condensate that breaks the initial Z12 vacuum symmetry to Z6. The spin ½ fermionic composites have the triality structure of a quark–lepton family, and the initial Z12 symmetry implies that there are six massless families, which mix to give three distinct families below the scale of the condensate. The spin 1 triality zero composites of the color triplet SU(4) gluons, when coupled to the condensate and with the color singlet representation of the 10 acting as a doorway state, lead to weak interactions of the fermionic composites through an SU(2) gauge algebra. The initial Z12 symmetry implies that this SU(2) gauge algebra structure is doubled, which in turn permits the corresponding independent gauge bosons to couple to chiral components of the composite fermions. Since the U(1) couples to the 10 representation as B-L, an effective SU (2)L× SU (2)R × U (1)B-L electroweak theory arises at the condensate scale, with all composites having the correct electric charge structure. Assuming a mechanism for forming composite Higgs bosons, the Z12→ Z6 symmetry breaking chain implies that below the condensate scale there can be two sets of discrete chiral Z6 triplets of Higgs doublets, as required by a phenomenological model for the CKM matrix that we have analyzed in detail elsewhere. A renormalization group analysis of the SU(4) model shows that the conversion by binding of one 10 of SU(4) to 12 triplets of SU(3) can give a very large, calculable hierarchy ratio between the SU(4) and the hadronic mass scales.

scholarly journals Suppression of Intramolecular Vibrational Energy Redistribution by Intense CW-Laser Fields

2011 ◽  
Vol 2011 ◽  
pp. 1-9 ◽  
Author(s):  
M. Sugawara
Keyword(s):  
Quantum Control ◽  
Vibrational Energy ◽  
Model System ◽  
Laser Fields ◽  
Energy Redistribution ◽  
Present Scheme ◽  
Intramolecular Vibrational Energy Redistribution ◽  
Cw Laser ◽  
Doorway State ◽  
Control Scheme

We present a quantum control scheme which realizes suppression of the intramolecular vibrational energy redistribution (IVR). In this scheme, we utilize effective decomposition brought by intense CW-laser fields, which enables to exclude the doorway state coupled to background manifolds. In doing so, we introduce a helper state and make it optically coupled with the doorway state through the intense CW-laser field. We have applied the present scheme to both the Bixon-Jortner model and the SCCl2 model system.

scholarly journals The Optical Model and Proton Elastic Scattering from 14N and 16O

1977 ◽  
Vol 30 (3) ◽  
pp. 287 ◽  
Author(s):  
A Gabric ◽  
K Amos
Keyword(s):  
Elastic Scattering ◽  
Optical Model ◽  
Model Potential ◽  
Light Nuclei ◽  
Projectile Energy ◽  
Strength Parameters ◽  
Proton Elastic Scattering ◽  
Doorway State ◽  
Optical Model Potential

Allowing for important doorway state effects in analyses of proton elastic scattering from the light nuclei 14N and 160 enables an average geometry optical model potential to be determined, the strength parameters of which show a smooth behaviour with projectile energy.

Doorway state approach to optical potential scattering

1980 ◽  
Vol 129 (1) ◽  
pp. 84-109 ◽  
Author(s):  
F. Lenz ◽  
E.J. Moniz ◽  
K. Yazaki
Keyword(s):  
Optical Potential ◽  
Potential Scattering ◽  
Doorway State

Coherent π° Photoproduction in the Quasi-Δ 33 Doorway State Model

1983 ◽  
Vol 2 (6) ◽  
pp. 1497-1504
Author(s):  
Ma Wei-hsing ◽  
Wang Ying-cai ◽  
Yu Zi-qiang ◽  
Xu Cheng-xian
Keyword(s):  
State Model ◽  
Doorway State
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