Fragmentation function of gluon into spin-singlet 
P
-wave quarkonium

We study the non-leptonic weak transitions of ground state baryons in diquark-quark model. These weak transitions exhibit the ΔI = 1/2 rule, which is hard to account for in the standard weak process. If the diquark correlations are strong among flavor-antitriplet and spin-singlet pairs, we can make the weak transitions among diquarks followed by pion emission much stronger than the standard process. We estimate all the non-leptonic weak transitions of ground state baryons by assuming the Pauli-Gürsey symmetry together with the SU(6) wave functions. We can account for all the P-wave transition strengths quantitatively and hence the ΔI = 1/2 rule.

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Analysis of the heavy quarkonium states hc and hb with QCD sum rules

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194514602336 ◽

2014 ◽

Vol 29 ◽

pp. 1460233

Author(s):

Zhi-Gang Wang ◽

Shu-Yuan Guo

Keyword(s):

Experimental Data ◽

Sum Rules ◽

P Wave ◽

Heavy Quarkonium ◽

Qcd Sum Rules ◽

Decay Constants ◽

Spin Singlet ◽

Structure Formula ◽

Quark Structure ◽

The Masses

In this article, we take the tensor currents [Formula: see text] to interpolate the P-wave spin-singlet heavy quarkonium states hQ, and study the masses and decay constants with the Borel sum rules and moments sum rules. The masses and decay constants from the Borel sum rules and moments sum rules are consistent with each other, the masses are also consistent with the experimental data. The heavy quarkonium states hQ couple potentially to the tensor currents [Formula: see text], and have the quark structure ϵijkξ†σkζ besides the quark structure [Formula: see text].

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Josephson effect in spin-singlet superconductor/ferromagnetic insulator/spin-triplet superconductor junctions with helical p-wave states

EPL (Europhysics Letters) ◽

10.1209/0295-5075/113/17007 ◽

2016 ◽

Vol 113 (1) ◽

pp. 17007 ◽

Cited By ~ 3

Author(s):

Q. Cheng ◽

B. Jin

Keyword(s):

Josephson Effect ◽

P Wave ◽

Spin Singlet ◽

Wave States ◽

Spin Triplet

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Pseudogap and Unconventional Pairing in the Hubbard Model

International Journal of Modern Physics B ◽

10.1142/s0217979298001812 ◽

1998 ◽

Vol 12 (29n31) ◽

pp. 2939-2945 ◽

Cited By ~ 7

Author(s):

Y. M. Malozovsky ◽

J. D. Fan

Keyword(s):

Hubbard Model ◽

P Wave ◽

Perturbation Approach ◽

S Wave ◽

Orbital State ◽

Adequate Model ◽

Hubbard Models ◽

Spin Singlet ◽

Spin Triplet ◽

Spin Response

The attractive (U < 0) and repulsive (U > 0) Hubbard models have been studied using the Fermi liquid perturbation approach. The attractive Hubbard model (U < 0) is an adequate model for 3 He , an incompressible and strongly paramagnetic liquid [Formula: see text], [Formula: see text] for |U|N F = 0.9) with a pseudogap in the charge response. A pairing instability and superfluidity for U < 0 exists in the spin channel only: spin-triplet with l = 0, or spin-singlet with l = 1 (p-wave orbital state j = s + l = 1), where l is the orbital momentum of a pair. The repulsive Hubbard model (U > 0) represents a highly compressible and nearly antiferromagnetic liquid [Formula: see text], [Formula: see text] for UN F = 0.9) with a pseudogap in the spin response. However, for U > 0 a pairing instability and superconductivity exist in the charge channel only: spin-singlet with l = 0 (s-wave), or with l = 2 (d-wave) in the case of an anisotropic Fermi surface.

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P-wave Cooper pair splitting

Beilstein Journal of Nanotechnology ◽

10.3762/bjnano.3.56 ◽

2012 ◽

Vol 3 ◽

pp. 493-500 ◽

Cited By ~ 5

Author(s):

Henning Soller ◽

Andreas Komnik

Keyword(s):

Andreev Reflection ◽

Cooper Pair ◽

Hamiltonian Formalism ◽

P Wave ◽

Cooper Pairs ◽

S Wave ◽

Spin Singlet ◽

Cross Correlations ◽

On Chip ◽

Crossed Andreev Reflection

Background: Splitting of Cooper pairs has recently been realized experimentally for s-wave Cooper pairs. A split Cooper pair represents an entangled two-electron pair state, which has possible application in on-chip quantum computation. Likewise the spin-activity of interfaces in nanoscale tunnel junctions has been investigated theoretically and experimentally in recent years. However, the possible implications of spin-active interfaces in Cooper pair splitters so far have not been investigated. Results: We analyze the current and the cross correlation of currents in a superconductor–ferromagnet beam splitter, including spin-active scattering. Using the Hamiltonian formalism, we calculate the cumulant-generating function of charge transfer. As a first step, we discuss characteristics of the conductance for crossed Andreev reflection in superconductor–ferromagnet beam splitters with s-wave and p-wave superconductors and no spin-active scattering. In a second step, we consider spin-active scattering and show how to realize p-wave splitting using only an s-wave superconductor, through the process of spin-flipped crossed Andreev reflection. We present results for the conductance and cross correlations. Conclusion: Spin-activity of interfaces in Cooper pair splitters allows for new features in ordinary s-wave Cooper pair splitters, that can otherwise only be realized by using p-wave superconductors. In particular, it provides access to Bell states that are different from the typical spin singlet state.

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