نتایج جستجو برای: composite fermion

تعداد نتایج: 132842  

1997
Atsushi Yamada

Weak coupling expansion of a chiral gauge theory on a lattice is discussed in the overlap formulation. We analyze the fermion propagator and the fermion-fermion-gauge boson vertex in the one loop level. The chiral properties of the propagator and vertex are correctly preserved without tuning the parameters involved even after the one-loop renormalization, and the ultraviolet divergent parts agr...

1996
Dima Bardin Dietrich Lehner Tord Riemann

We study Standard Model four-fermion production in e+e− annihilation at LEP2 energies and above using a semi-analytical approach. We derive the complete QED initial state corrections (ISR) to the reactions e+e− → (Z0Z0) → f1f̄1f2f̄2 and e+e− → (W+W−) → f̄u 1 fd 1 fu 2 f̄d 2 with f1 6= f2 and fi 6= e±, (−) νe . As compared to the well-known universal s-channel ISR, additional complexity arises due t...

2003
G. Triantafyllou G. Korres

In this work the ability of nesting two hydrodynamical models, the high-resolution Cretan Sea shelf model and the lower resolution regional ALERMO model, was investigated. A new database was developed by objectively analysing raw climatological data from the MODB database enriched with in situ measurements collected by the Institute of Marine Biology of Crete. Prior to nesting with the ALERMO m...

1996
Jun Nishimura

We propose a method to formulate four-dimensional N = 1 super Yang-Mills theory on the lattice without ne-tuning. We rst show that four-dimensional Weyl fermion in a real representation, which is equivalent to Majorana fermion, can be formulated using the domain wall approach with an addition of a Majorana mass term only for the unwanted mirror fermion. This formalism has manifest gauge invaria...

1998
Tomasz Radożycki

The fermion propagator and the 4-fermion Green function in the massless QED2 are explicitly found with topological effects taken into account. The corrections due to instanton sectors k = ±1, contributing to the propagator, are shown to be just the homogenous terms admitted by the Dyson-Schwinger equation for S. In the case of the 4-fermion function also sectors k = ±2 are included into conside...

1998
A Campbell Smith

The composite operator effective potential is compared with the conventional Dyson–Schwinger method as a calculational tool for (2+1)-dimensional quantum electrodynamics. It is found that when the fermion propagator ansatz is put directly into the effective potential, it reproduces exactly the usual gap equations derived in the Dyson–Schwinger approach.

Journal: :Computers & Industrial Engineering 2008
Joc Cing Tay Nhu Binh Ho

We solve the multi-objective flexible job-shop problems by using dispatching rules discovered through genetic programming. While Simple Priority Rules have been widely applied in practice, their efficacy remains poor due to lack of a global view. Composite dispatching rules have been shown to be more effective as they are constructed through human experience. In this paper, we evaluate and empl...

1996
Kingman Cheung Dennis Silverman

The statistical limits on detectability of an anomalous chromomagnetic moment of a quark coupling to a gluon are projected to higher luminosities at the Tevatron at Fermilab, and to the LHC. They roughly scale as the energy, and are not strongly improved with increasing lumonisity. New interactions or composite structure can lead to anomalous magnetic moments for electromagnetic interactions an...

2009
W. Hufenbach

Hybrid yarns consisting of thermoplastic filaments and reinforcing glass filaments offer a high potential for highly efficient manufacture technologies for composite structures. The development of an adapted manufacturing technology for thermoplastic 3D shaped textile-reinforced composite trays is presented. In this context a manufacturing concept was developed, the drapability of different tex...

2008
Yuichi Hoshino

The Gauge Technique has been applied to QED2+1 in the quenched case with infrared subtraction. The behaviour of the fermion propagator near the threshold is then found to be S(p) → (γ · p+m) (p −m) ( p −m 2m ) exp(− ης 2 ), where ς = e/(4πm) and this is gauge invariant except the exponential factor. We also find a spectral function in the Landau and Yennie like gauge. The propagators S(p) are e...

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