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34 papers · 1 filter
Transverse spin structure of the nucleon from lattice QCD simulations
M. Göckeler, Ph. Hägler, R. Horsley +7
We present the first calculation in lattice QCD of the lowest two moments of transverse spin densities of quarks in the nucleon. They encode correlations between quark spin and orb…
Spin Analysis of Supersymmetric Particles
S. Y. Choi, K. Hagiwara, H. -U. Martyn +2
The spin of supersymmetric particles can be determined at colliders unambiguously. This is demonstrated for a characteristic set of non-colored supersymmetric particles --…
Spin motion at and near orbital resonance in storage rings with Siberian Snakes. Part I: at orbital resonance
D. P. Barber, M. Vogt
Here, and in a sequel, we invoke the invariant spin field to provide an in--depth study of spin motion at and near low order orbital resonances in a simple model for the effects of…
Polarization in SUSY Cascade Decays
S. Y. Choi, K. Hagiwara, Y. G. Kim +2
leptons emitted in cascade decays of supersymmetric particles are polarized. The polarization may be exploited to determine spin and mixing properties of the neutralinos and st…
The Neutralino Sector in the U(1)-Extended Supersymmetric Standard Model
S. Y. Choi, H. E. Haber, J. Kalinowski +1
Motivated by grand unified theories and string theories we analyze the general structure of the neutralino sector in the USSM, an extension of the Minimal Supersymmetric Standard M…
Spontaneous Non-thermal Leptogenesis in High-scale Inflation Models
Motoi Endo, Fuminobu Takahashi, T. T. Yanagida
We argue that a non-thermal leptogenesis occurs spontaneously, without direct couplings of the inflaton with right-handed neutrinos, in a wide class of high-scale inflation models…