498 research outputs found

    Collective Coordinates and the Absence of Yukawa Coupling in the Classical Skyrme Model

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    In systems with constraints, physical states must be annihilated by the constraints. We make use of this rule to construct physical asymptotic states in the Skyrme model. The standard derivation of the Born terms with asymptotic physical states shows that there is no Yukawa coupling for the Skyrmion. We propose a remedy tested in other solitonic models: A Wilsonian action obtained after integrating the energetic mesons and where the Skyrmion is a quantum state should have a Yukawa coupling.Comment: LATE

    Quantum Solitons Lead to Yukawa Coupling

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    Recently, it was shown that zero modes in semiclassical soliton models do not lead to Yukawa couplings. We show that taking into account the contributions of the quantum soliton into the renormalization scheme, which cannot be done in semiclassical treatments, leads to a Yukawa coupling. A similar analysis should be possible for the Skyrmion, renewing the hope, that this model will lead to a correct description of hadron physics.Comment: LATEX, Submitted to Phys. Lett.

    Can Plane Wave Modes be Physical Modes in Soliton Models?

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    I show that plane waves may not be used as asymptotic states in soliton models because they describe unphysical states. When asymptotic states are taken to be physical there is no T-matrix of \cO(1).Comment: Latex. Published in Phys. Lett.

    Charged Open Membrane Solutions On A Manifold With Boundary

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    Explicit open single and multi-membrane solutions of the low energy limit of M-theory on the orbifold R10Ă—S1/Z2R^{10}\times S^1/Z_2 are presented. This low energy action is described by an 11-dimensional supergravity action coupled to two E8E_8 super Yang-Mills fields, which propagate only on the 10-dimensional boundaries of the target space. The membrane solutions we construct preserve half the supersymmetries. They carry electric charge and current with respect to the gauge fields, whose generators are in the Cartan subalgebra of the two E8E_8 gauge groups present at the boundaries.Comment: 14 pages, Late

    The SO(32) Heterotic and Type IIB Membranes

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    A two dimensional anomaly cancellation argument is used to construct the SO(32) heterotic and type IIB membranes. By imposing different boundary conditions at the two boundaries of a membrane, we shift all of the two dimensional anomaly to one of the boundaries. The topology of these membranes is that of a 2-dimensional cone propagating in the 11-dimensional target space. Dimensional reduction of these membranes yields the SO(32) heterotic and type IIB strings.Comment: 12 pages, Late

    Brownian Motion of Solitons in the Φ4\Phi^4 Model

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    We derive an expression for the correlation function of the random force on a soliton which is consistent with the constraints needed to integrate out the zero modes which appear due to the broken translational symmetry of the soliton solution. It is shown that when the constraint does not commute with the operator which defines the correlation function, i.e. when the operator is not physical, only low frequency phonons contributions may be considered. On the contrary, when the correlation function of the random force on the soliton is constructed with physical operators one may also include in a correct manner the contributions from the optical phonons.Comment: latex, 1 eps figure at end of fil

    The Standard Model Coupled to Quantum Gravitodynamics

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    We show that the renormalizable SO(4) X U (1) X SU (2) X SU (3) Yang Mills coupled to matter and the Higgs field fits all the experimentally observed differential cross sections known in nature. This extended Standard Model reproduces the experimental gravitational differential cross sections without resorting to the graviton field and instead by exchanging SO(4) gauge fields. By construction, each SO(4) generator in quantum gravitodynamics does not commute with the Dirac gamma matrices. This produces additional interactions absent to non-Abelian gauge fields in the Standard Model. The contributions from these new terms yield differential cross sections consistent with the Newtonian and post Newtonian interactions derived from General Relativity. Dimensional analysis of the Lagrangian shows that all its terms have total dimensionality four or less and therefore that all physical quantities in the theory renormalize by finite amounts. These properties make QGD the only renormalizable 4-dimensional theory describing gravitational interactions.Comment: Accepted for publication in the European Physical Journal C. Note of Acceptance ID EPJC-16-03-073.R
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