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Noyes, H.P.

Stanford Linear Accelerator Center, Menlo Park, CA (United States). Funding organisation: USDOE Office of Energy Research, Washington, DC (United States)

Stanford Linear Accelerator Center, Menlo Park, CA (United States). Funding organisation: USDOE Office of Energy Research, Washington, DC (United States)

AbstractAbstract

[en] This paper starts with a personal memoir of how some significant ideas arose and events took place during the period from 1972, when the author first encountered Ted Bastin, to 1979, when the author proposed the foundation of ANPA. He then discusses program universe, the fine structure paper and its rejection, the quantitative results up to ANPA 17 and take a new look at the handy-dandy formula. Following the historical material is a first pass at establishing new foundations for bit-string physics. An abstract model for a laboratory notebook and a historical record are developed, culminating in the bit-string representation. The author set up a tic-toc laboratory with two synchronized clocks and shows how this can be used to analyze arbitrary incoming data. This allows him to discuss (briefly) finite and discrete Lorentz transformations, commutation relations, and scattering theory. Earlier work on conservation laws in 3- and 4-events and the free space Dirac and Maxwell equations is cited. The paper concludes with a discussion of the quantum gravity problem from his point of view and speculations about how a bit-string theory of strong, electromagnetic, weak and gravitational unification could take shape

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Jun 1997; 42 p; 18. international meeting of the Alternative Natural Philosophy Association; Cambridge (United Kingdom); 4-7 Sep 1996; CONF-9609376--1; CONTRACT AC03-76SF00515; Also available from OSTI as DE97006992; NTIS; US Govt. Printing Office Dep

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Cima, O.M. del; Franco, D.H.T.; Helayel-Neto, J.A.; Piguet, O.

Centro Brasileiro de Pesquisas Fisicas (CBPF), Rio de Janeiro, RJ (Brazil)

Centro Brasileiro de Pesquisas Fisicas (CBPF), Rio de Janeiro, RJ (Brazil)

AbstractAbstract

[en] In this letter the algebraic renormalization method, which is independent of any kind of regularization scheme, is presented for the parity-preserving QED

_{3}coupled to scalar matter in the broken regime, where the scalar assumes a finite vacuum expectation value,<φ>=v. The model shows to be stable under radiative corrections and anomaly free. (author)Primary Subject

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Nov 1996; 11 p; UGVA-DPT--1996-10-953; ISSN 0029-3865; ; 9 refs.; e-mail: oswaldo at cbpfsu1.cat.cbpf.br; franco at cbpfsu1.cat.cbpf.br; piguet at sc2a.unige.ch.

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Faraggi, A.E.

Florida Univ., Gainesville, FL (United States). Inst. for Fundamental Theory. Funding organisation: USDOE Office of Energy Research, Washington, DC (United States)

Florida Univ., Gainesville, FL (United States). Inst. for Fundamental Theory. Funding organisation: USDOE Office of Energy Research, Washington, DC (United States)

AbstractAbstract

[en] The realistic free fermionic models have had remarkable success in providing plausible explanations for various properties of the Standard Model which include the natural appearance of three generations, the explanation of the heavy top quark mass and the qualitative structure of the fermion mass spectrum in general, the stability of the proton and more. These intriguing achievements makes evident the need to understand the general space of these models. While the number of possibilities is large, general patterns can be extracted. In this paper the author presents a detailed discussion on the construction of the realistic free fermionic models with the aim of providing some insight into the basic structures and building blocks that enter the construction. The role of free phases in the determination of the phenomenology of the models is discussed in detail. The author discusses the connection between the free phases and mirror symmetry in (2,2) models and the corresponding symmetries in the case of (2,0) models. The importance of the free phases in determining the effective low energy phenomenology is illustrated in several examples. The classification of the models in terms of boundary condition selection rules, real world-sheet fermion pairings, exotic matter states and the hidden sector is discussed

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Aug 1997; 44 p; UFIFT-HEP--97-23; CONTRACT FG05-86ER40272; Also available from OSTI as DE98000023; NTIS; US Govt. Printing Office Dep

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Faraggi, A.E.; Pati, J.C.

Florida Univ., Gainesville, FL (United States). Inst. for Fundamental Theory. Funding organisation: USDOE Office of Energy Research, Washington, DC (United States)

Florida Univ., Gainesville, FL (United States). Inst. for Fundamental Theory. Funding organisation: USDOE Office of Energy Research, Washington, DC (United States)

AbstractAbstract

[en] Recently a promising mechanism for supersymmetry breaking that utilizes both an anomalous U(1) gauge symmetry and an effective mass term m ∼ 1TeV of certain relevant fields has been proposed. In this paper we examine whether such a mechanism can emerge in superstring derived free fermionic models. We observe that certain three generation string solutions, though not all, lead to an anomalous U(1) which couples universally to all three families. The advantages of this three-family universality of U(1)

_{A}, compared to the two-family case, proposed in earlier works, in yielding squark degeneracy, while avoiding radiative breaking of color and charge, are noted. The root cause of the flavor universality of U(1)_{A}is the cyclic permutation symmetry that characterizes the Z_{2}x Z_{2}orbifold compactification with standard embedding, realized in the free fermionic models by the NAHE set. It is shown that nonrenormalizable terms which contain hidden-sector condensates, generate the required suppression of the relevant mass term m, compared to the Planck scale. While the D-term of the family universal U(1)_{A}leads to squark degeneracy, those of the family dependent U(1)'s, remarkably enough, are found to vanish for the solutions considered, owing to minimization of the potentialPrimary Subject

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Dec 1997; 45 p; UFIFT-HEP--97-29; UMD-PP--98-54; HEP-PH--9; CONTRACT FG05-86ER40272; ALSO AVAILABLE FROM OSTI AS DE98005174; NTIS; US GOVT. PRINTING OFFICE DEP

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Nair, V.P.; Randjbar-Daemi, S.

Abdus Salam International Centre for Theoretical Physics, Trieste (Italy)

Abdus Salam International Centre for Theoretical Physics, Trieste (Italy)

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[en] In this paper we consider brane solutions of the form G/H in M(atrix) theory, showing the emergence of world volume coordinates for the cases where G=SU(n). We examine a particular solution with a world volume geometry of the form CP

^{2}xS^{1}in some detail and show how a smooth manifold structure emerges in the large N limit. In this limit the solution becomes static; it is not supersymmetric but is part of a supersymmetric set of configurations. Supersymmetry in small locally flat regions can be obtained, but this is not globally defined. A general group theoretic analysis of the previously known spherical brane solutions is also given. (author)Primary Subject

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Feb 1998; 16 p; 11 refs

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Malbouisson, A.P.C.; Silva-Neto, M.B.; Svaiter, N.F.

Centro Brasileiro de Pesquisas Fisicas (CBPF), Rio de Janeiro, RJ (Brazil)

Centro Brasileiro de Pesquisas Fisicas (CBPF), Rio de Janeiro, RJ (Brazil)

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[en] We perform the dimensional reduction of the linear σ model at one-loop level. The effective of the reduced theory obtained from the integration over the nonzero Matsubara frequencies is exhibited. Thermal mass and coupling constant renormalization constants are given, as well as the thermal renormalization group which controls the dependence of the counterterms on the temperature. We also recover, for the reduced theory, the vacuum instability of the model for large N. (author)

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May 1997; 14 p; ISSN 0029-3865; ; 28 refs.

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Zhou Bangrong

Abdus Salam International Centre for Theoretical Physics, Trieste (Italy)

Abdus Salam International Centre for Theoretical Physics, Trieste (Italy)

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[en] In a one-generation fermion condensate scheme of electroweak symmetry breaking, it is proven that at finite temperature T below the symmetry restoration temperature T

_{c}, a massive Higgs boson and three massless Nambu-Goldstone bosons could emerge from the spontaneous breaking of electroweak group SU_{L}(2)xU_{Y}(1)→U_{Q}(1) if the two fermion flavors in the one generation are mass-degenerate, thus the Goldstone Theorem is rigorously valid in this case. However, if the two fermion flavors have unequal masses, owing to 'thermal fluctuation', the Goldstone Theorem will be true only approximately for a very large momentum cut-off Λ in zero temperature fermion loop or for low energy scales. All possible pinch singularities are proven to cancel each other, as is expected in a real-time thermal field theory. (author)Primary Subject

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Aug 1998; 13 p; 8 refs

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Lyubovitskij, V.E.; Lipartiya, Eh.Z.; Rusetskij, A.G.

Bogolyubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna (Russian Federation)

Bogolyubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna (Russian Federation)

AbstractAbstract

[en] The perturbative framework is developed for the calculation of the π

^{+}π^{-}atom characteristics on the basis of the field-theoretical Bethe-Salpeter approach. A closed expression for the first-order correction to the π^{+}π^{-}atom lifetime has been obtainedPrimary Subject

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1997; 8 p; 15 refs. Submitted to the journal, Pis'ma v Zhurnal Ehksperimental'noj i Teoreticheskoj Fiziki.

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Manoff, S.; Dimitrov, B.

Bogolyubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna (Russian Federation)

Bogolyubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna (Russian Federation)

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[en] The Kronecker tensor field, the contraction tensor field, as well as the multi-Kronecker and multi-contraction tensor fields are determined and the action of the covariant differential operator, the Lie differential operator, the curvature operator, and the deviation operator on these tensor fields is established. The commutation relations between the operators Sym and Asym and the covariant and Lie differential operators are considered acting on symmetric and antisymmetric tensor fields over (L

_{n}bar, g)-spacesPrimary Subject

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1998; 22 p; 9 refs.

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Ford, L.H.; Svaiter, N.F.

Centro Brasileiro de Pesquisas Fisicas (CBPF), Rio de Janeiro, RJ (Brazil)

Centro Brasileiro de Pesquisas Fisicas (CBPF), Rio de Janeiro, RJ (Brazil)

AbstractAbstract

[en] The imposition of boundary conditions upon a quantized field can lead to singular energy densities on the boundary. We treat the boundaries as quantum mechanical objects with nonzero position uncertainty, and show that the singular energy density is removed. This treatment also resolves a long standing paradox concerning the total energy of the minimally coupled and conformally coupled scalar fields. (author)

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Apr 1998; 17 p; ISSN 0029-3865; ; 14 refs., 2 figs.; e-mail: ford at cosmos2.phy.tufts.edu; nfuxsvai at lafex.cbpf.br

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