Date: Thu, 29 Nov 07 01:01:01 GMT Subject: hep-th daily 15 new + 8 crosses received by eprepget ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ Send any complaints regarding submissions directly to submitter. ------------------------------------------------------------------------------ Point your www client at http://arXiv.org/ To unsubscribe, e-mail To: hep-th@arXiv.org, Subject: cancel ------------------------------------------------------------------------------ received by eprepget from Tue 27 Nov 07 21:00:04 GMT to Wed 28 Nov 07 21:00:02 GMT ------------------------------------------------------------------------------ \\ arXiv:0711.4354 Date: Wed, 28 Nov 2007 11:12:02 GMT (18kb) Title: Complete Six-Gluon Disk Amplitude in Superstring Theory Authors: Stephan Stieberger, Tomasz R. Taylor Categories: hep-th Comments: 23 pages, harvmac \\ We evaluate all next-to-maximal helicity violating (NMHV) six-gluon amplitudes in type I open superstring theory in four dimensions, at the disk level, to all orders in alpha'. Although the computation utilizes supersymmetric Ward identities, the result holds for all compactifications, even for those that break supersymmetry and is completely model-independent. Together with the maximally helicity violating (MHV) amplitudes presented in the previous work, our results provide the complete six-gluon disk amplitude. \\ ( http://arxiv.org/abs/0711.4354 , 18kb) ------------------------------------------------------------------------------ \\ arXiv:0711.4421 Date: Wed, 28 Nov 2007 19:32:56 GMT (185kb) Title: Sequestering CP Violation and GIM-Violation with Warped Extra Dimensions Authors: Clifford Cheung (Harvard U., Phys. Dept. & Princeton, Inst. Advanced Study), A. Liam Fitzpatrick (Harvard U., Phys. Dept.), Lisa Randall (Harvard U., Phys. Dept.) Categories: hep-th Comments: 38 pages \\ We propose a model of spontaneous CP violation to address the strong CP problem in warped extra dimensions that relies on sequestering flavor and CP violation. We assume that brane-localized Higgs Yukawa interactions respect a U(3) flavor symmetry that is broken only by bulk fermion mass and Yukawa terms. All CP violation arises from the vev of a CP-odd scalar field localized in the bulk. To suppress radiative corrections to theta-bar, the doublet quarks in this model are localized on the IR brane. We calculate constraints from flavor-changing neutral currents (FCNCs), precision electroweak measurements, CKM unitarity, and the electric dipole moments in this model and predict theta-bar to be at least about 10^-12. \\ ( http://arxiv.org/abs/0711.4421 , 185kb) ------------------------------------------------------------------------------ \\ arXiv:0711.4422 Date: Wed, 28 Nov 2007 13:19:05 GMT (20kb) Title: Rotating Black Holes in Einstein-Maxwell-Dilaton Gravity Authors: Ahmad Sheykhi Categories: hep-th Comments: 9 pages, 7 figures \\ The counterpart of the Kerr-Newman solution in higher dimensions, that is the charged generalization of the Myers-Perry solution \cite{Myer} in $(n+1)$-dimensional Einstein-Maxwell gravity, still remains to be found analytically. In this Letter, as a new step to shed some light on this issue for further investigation, we present a class of slowly rotating solutions in $(n+1)$-dimensional $(n\geq3)$ Einstein-Maxwell-dilaton gravity in the presence of Liouville-type potential for the dilaton field and an arbitrary value of the dilaton coupling constant. The asymptotic behaviours of these solutions are neither flat nor (A)dS. In the absence of a dilaton field, our solution reduces to the $(n+1)$-dimensional Kerr-Newman modification thereof for small rotation parameter \cite{Aliev2}. We also compute the angular momentum and the gyromagnetic ratio of these rotating dilaton black holes. As a result, we find that the dilaton field can modify the gyromagnetic ratio of the rotating black holes and we no longer have $g=n-1$. \\ ( http://arxiv.org/abs/0711.4422 , 20kb) ------------------------------------------------------------------------------ \\ arXiv:0711.4463 Date: Wed, 28 Nov 2007 10:35:43 GMT (16kb) Title: Noncommutativity in space-time extended by Liouville field Authors: B. Nikolic and B. Sazdovic Categories: hep-th Comments: three tables, two appendices \\ The world-sheet quantum conformal invariance can be realized in the presence of the conformal factor $F$, by inclusion of Liouville term. In the background with linear dilaton field, $\Phi(x)=\Phi_0+a_\mu x^\mu$, the field $F$ becomes a new noncommutative variable. Therefore, it is natural to extend space-time with a new coordinate, $F$, in order to unify expressions for noncommutativity parameter $\Theta^{ij}$ of the space-time coordinates $x^i$, with the part $\Theta^i$ connecting noncommutativity between coordinates $x^i$ and $F$. In this way we solve the problems of Dp-brane noncommutativity in a more elegant way. The technical advantage uses the fact that in the extended space-time the action with dilaton field can be rewritten in dilaton free form. We use canonical method and extend its application to the derivation of boundary conditions. From requirement that Hamiltonian, as the time translation generator, has well defined derivatives in the coordinates and momenta, we obtain boundary conditions directly in the canonical form. \\ ( http://arxiv.org/abs/0711.4463 , 16kb) ------------------------------------------------------------------------------ \\ arXiv:0711.4467 Date: Wed, 28 Nov 2007 10:54:19 GMT (377kb,D) Title: Mesons in Gauge/Gravity Duals - A Review Authors: Johanna Erdmenger, Nick Evans, Ingo Kirsch, Ed Threlfall Categories: hep-th Comments: 115 pages, 32 pdf figures Report-no: MPP-2007-108, SHEP-07-45, NI-07-071 \\ We review recent progress in studying mesons within gauge/gravity duality, in the context of adding flavour degrees of freedom to generalizations of the AdS/CFT correspondence. Our main focus is on the `top-down approach' of considering models constructed within string theory. We explain the string-theoretical constructions in detail, aiming at non-specialists. These give rise to a new way of describing strongly coupled confining large N gauge gauge theories similar to large N QCD. In particular, we consider gravity dual descriptions of spontaneous chiral symmetry breaking, and compare with lattice results. A further topic covered is the behaviour of flavour bound states in finite temperature field theories dual to a gravity background involving a black hole. We also describe the `bottom up' phenomenological approach to mesons within AdS/QCD. -- Some previously unpublished results are also included. \\ ( http://arxiv.org/abs/0711.4467 , 377kb) ------------------------------------------------------------------------------ \\ arXiv:0711.4469 Date: Wed, 28 Nov 2007 10:59:10 GMT (66kb) Title: Cyclic Universe with Quintom matter in Loop Quantum Cosmology Authors: Hua-Hui Xiong, Taotao Qiu, Yi-Fu Cai, Xinmin Zhang Categories: hep-th Comments: 11 pages, 2 figures \\ In this paper, we study the possibility of model building of cyclic universe with Quintom matter in the framework of Loop Quantum Cosmology. After a general demonstration, we provide two examples, one with double-fluid and another double-scalar field, to show how such a scenario is obtained. Analytical and numerical calculations are both presented in the paper. \\ ( http://arxiv.org/abs/0711.4469 , 66kb) ------------------------------------------------------------------------------ \\ arXiv:0711.4489 Date: Wed, 28 Nov 2007 12:58:30 GMT (8kb) Title: On Lagrangian formulation for half-integer HS fields within Hamiltonian BRST approach Authors: Alexander A. Reshetnyak Categories: hep-th Comments: 5 pages, Contribution to Proceedings of the International Workshop "Supersymmetries and Quantum Symmetries", Dubna, July, 30 - August, 4, 2007 \\ The recently obtained results according to gauge-invariant Lagrangian formulation for massive and massless half-integer higher-spin fields on AdS and Minkowski spaces are presented. Whole procedure is based on BFV-BRST operator encoding the specially realized in terms of the constraints in the Fock space the initial conditions which extract the higher-spin fields from AdS (Poincare) group unitary irreducible representations. The above construction is applicable to tensor higher-spin fields subject to multirow Young tableaux. \\ ( http://arxiv.org/abs/0711.4489 , 8kb) ------------------------------------------------------------------------------ \\ arXiv:0711.4496 Date: Wed, 28 Nov 2007 13:30:16 GMT (27kb) Title: New features of the gluon and ghost propagator in the infrared region from the Gribov-Zwanziger approach Authors: D.Dudal, S.P.Sorella, N.Vandersickel, H.Verschelde Categories: hep-th Comments: 4 pages, 1 .eps figure. Package braket.sty included \\ So far, the infrared behavior of the gluon and ghost propagator based on the Gribov-Zwanziger approach predicted a positivity violating gluon propagator vanishing at zero momentum, and an infrared enhanced ghost propagator. However, recent data based on huge lattices have revealed a positivity violating gluon propagator which turns out to attain a finite nonvanishing value very close to zero momentum. At the same time the ghost propagator does not seem to be infrared enhanced anymore. We point out that these new features can be accounted for by yet unexploited dynamical effects within the Gribov-Zwanziger approach, leading to an infrared behavior in qualitatively good agreement with the new data. \\ ( http://arxiv.org/abs/0711.4496 , 27kb) ------------------------------------------------------------------------------ \\ arXiv:0711.4511 Date: Wed, 28 Nov 2007 14:36:24 GMT (11kb) Title: A new approach to the relativistic treatment of the fermion-boson system, based on the extension of the SL(2,C) group Authors: D. A. Kulikov and R. S. Tutik Categories: hep-th Comments: 7 pages, revtex \\ A new technique for constructing the relativistic wave equation for the two-body system composed of the spin-1/2 and spin-0 particles is proposed. The method is based on the extension of the SL(2,C) group to the Sp(4,C) one. The obtained equation includes the interaction potentials, having both the Lorentz-vector and Lorentz-tensor structure, exactly describes the relativistic kinematics and possesses the correct one-particle limits. The comparison with results of other approaches to this problem is discussed. \\ ( http://arxiv.org/abs/0711.4511 , 11kb) ------------------------------------------------------------------------------ \\ arXiv:0711.4532 Date: Wed, 28 Nov 2007 16:35:58 GMT (29kb) Title: A holographic computation of the central charges of d=4, N=2 SCFTs Authors: Ofer Aharony and Yuji Tachikawa Categories: hep-th Comments: 16 pages Report-no: WIS/20/07-NOV-DPP \\ We use the AdS/CFT correspondence to compute the central charges of the d=4, N=2 superconformal field theories arising from N D3-branes at singularities in F-theory. These include the conformal theories with E_n global symmetries. We compute the central charges a and c related to the conformal anomaly, and also the central charges k associated to the global symmetry in these theories. All of these are related to the coefficients of Chern-Simons terms in the dual string theory on AdS_5. Our computation is exact for all values of N, enabling several tests of the dualities recently proposed by Argyres and Seiberg for the E_6 and E_7 theories with N=1. \\ ( http://arxiv.org/abs/0711.4532 , 29kb) ------------------------------------------------------------------------------ \\ arXiv:0711.4541 Date: Wed, 28 Nov 2007 17:17:08 GMT (4kb) Title: Einstein-Yang-Mills Solitons: The Role of Gravity Authors: Shahar Hod Categories: hep-th Comments: 6 pages Journal-ref: Physics Letters B {\bf 657}, 255 (2007) \\ The canonical Bartnik-McKinnon solitons are regular solutions of the coupled Einstein-Yang-Mills system in which gravity may balance the repulsive nature of the Yang-Mills field. We examine the role played by gravity in balancing the system and determine its strength. In particular, we obtain an analytic lower bound on the fundamental mass-to-radius ratio, max{2m(r)/r}>2/3, which is a necessary condition for the existence of globally regular Einstein-Yang-Mills solitons. Our analytical results are in accord with numerical calculations. \\ ( http://arxiv.org/abs/0711.4541 , 4kb) ------------------------------------------------------------------------------ \\ arXiv:0711.4546 Date: Wed, 28 Nov 2007 17:48:55 GMT (16kb) Title: On Black Holes and Cosmological Constant in Noncommutative Gauge Theory of Gravity Authors: M. Chaichian, M. R. Setare, A. Tureanu, G. Zet Categories: hep-th Comments: Based on a talk given at the International Conference on Fundamental and Applied Research in Physics "Farphys 2007", 25-28 October 2007, Iasi, Romania \\ Deformed Reissner-Nordstr\"om, as well as Reissner-Nordstr\"om de Sitter, solutions are obtained in a noncommutative gauge theory of gravitation. The gauge potentials (tetrad fields) and the components of deformed metric are calculated to second order in the noncommutativity parameter. The solutions reduce to the deformed Schwarzschild ones when the electric charge of the gravitational source and the cosmological constant vanish. Corrections to the thermodynamical quantities of the corresponding black holes and to the radii of different horizons have been determined. All the independent invariants, such as the Ricci scalar and the so-called Kretschmann scalar, have the same singularity structure as the ones of the usual undeformed case and no smearing of singularities occurs. The possibility of such a smearing is discussed. In the noncommutative case we have a local disturbance of the geometry around the source, although asymptotically at large distances it becomes flat. \\ ( http://arxiv.org/abs/0711.4546 , 16kb) ------------------------------------------------------------------------------ \\ arXiv:0711.4547 Date: Wed, 28 Nov 2007 17:49:18 GMT (65kb,D) Title: Extremal Black Hole and Flux Vacua Attractors Authors: S. Bellucci, S. Ferrara, R. Kallosh, A. Marrani Categories: hep-th Comments: 1+74 pages, 2 Tables. Contribution to the Proceedings of the Winter School on Attractor Mechanism 2006 (SAM2006), 20-24 March 2006, INFN-LNF, Frascati, Italy Report-no: CERN-PH-TH/182; UCLA/07/TEP/22; SU-ITP-2007-21 \\ These lectures provide a pedagogical, introductory review of the so-called Attractor Mechanism (AM) at work in two different 4-dimensional frameworks: extremal black holes in N=2 supergravity and N=1 flux compactifications. In the first case, AM determines the stabilization of scalars at the black hole event horizon purely in terms of the electric and magnetic charges, whereas in the second context the AM is responsible for the stabilization of the universal axion-dilaton and of the (complex structure) moduli purely in terms of the RR and NSNS fluxes. Two equivalent approaches to AM, namely the so-called ``criticality conditions'' and ``New Attractor'' ones, are analyzed in detail in both frameworks, whose analogies and differences are discussed. Also a stringy analysis of both frameworks (relying on Hodge-decomposition techniques) is performed, respectively considering Type IIB compactified on $CY_{3}$ and its orientifolded version, associated with $\frac{CY_{3}\times T^{2}}{\mathbb{Z}_{2}}$. Finally, recent results on the U-duality orbits and moduli spaces of non-BPS extremal black hole attractors in $3\leqslant N\leqslant 8$, d=4 supergravities are reported. \\ ( http://arxiv.org/abs/0711.4547 , 65kb) ------------------------------------------------------------------------------ \\ arXiv:0711.4551 Date: Wed, 28 Nov 2007 18:10:10 GMT (170kb) Title: Universality of large N phase transitions in Wilson loop operators in two and three dimensions Authors: R. Narayanan, H. Neuberger Categories: hep-th Comments: 43 pages, 1 table, 18 figures, uses JHEP.cls \\ The eigenvalue distribution of a Wilson loop operator of fixed shape undergoes a transition under scaling at infinite N. We derive a large N scaling function in a double scaling limit of the average characteristic polynomial associated with the Wilson loop operator in two dimensional QCD. We hypothesize that the transition in three and four dimensional large N QCD are also in the same universality class and provide a numerical test for our hypothesis in three dimensions. \\ ( http://arxiv.org/abs/0711.4551 , 170kb) ------------------------------------------------------------------------------ \\ arXiv:0711.4564 Date: Wed, 28 Nov 2007 19:26:07 GMT (438kb) Title: Scalar Casimir Effect on a D-dimensional Einstein Static Universe Authors: Carlos A. R. Herdeiro, Raquel H. Ribeiro, Marco Sampaio Categories: hep-th Comments: 37 pages, 15 figures \\ We compute the renormalised energy momentum tensor of a free scalar field coupled to gravity on an (n+1)-dimensional Einstein Static Universe (ESU), RxS^n, with arbitrary low energy effective operators (up to mass dimension n+1). A generic class of regulators is used, together with the Abel-Plana formula, leading to a manifestly regulator independent result. The general structure of the divergences is analysed to show that all the gravitational couplings (not just the cosmological constant) are renormalised for an arbitrary regulator. Various commonly used methods (damping function, point-splitting, momentum cut-off and zeta function) are shown to, effectively, belong to the given class. The final results depend strongly on the parity of n. A detailed analytical and numerical analysis is performed for the behaviours of the renormalised energy density and a quantity `sigma' which determines if the strong energy condition holds for the `quantum fluid'. We briefly discuss the quantum fluid back-reaction problem, via the higher dimensional Friedmann and Raychaudhuri equations, observe that equilibrium radii exist and unveil the possibility of a `Casimir stabilisation of Einstein Static Universes'. \\ ( http://arxiv.org/abs/0711.4564 , 438kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:0710.3276 (*cross-listing*) Date: Wed, 17 Oct 2007 11:58:02 GMT (264kb) Title: Group field theory as the microscopic description of the quantum spacetime fluid: a new perspective on the continuum in quantum gravity Authors: Daniele Oriti Categories: gr-qc hep-th Comments: PoS style; 38 pages, 6 figures; contribution to the proceedings of the conference 'From quantum to emergent gravity: theory and phenomenology', SISSA, Trieste, Italy, June 11-15 (2007) Report-no: ITP-UU-07/54, SPIN-07/40 \\ We introduce the group field theory (GFT) formalism for non-perturbative quantum gravity, and present it as a potential unifying framework for several other quantum gravity approaches, i.e. loop quantum gravity and simplicial quantum gravity ones. We then argue in favor of and present in detail what we believe is a new GFT perspective on the emergence of continuum spacetime from discrete quantum structures, based on the idea of quantum space as a condensed matter system. We put forward a more specific, albeit still very much tentative, proposal for the relevant phase of the GFT corresponding to the continuum: a Bose-Einstein condensate of GFT quanta. Finally, we sketch how the proposal may be realised and its effective dynamics could be extracted in the GFT setting and compared with continuum gravity theories. \\ ( http://arxiv.org/abs/0710.3276 , 264kb) ------------------------------------------------------------------------------ \\ arXiv:0711.3170 (*cross-listing*) Date: Tue, 20 Nov 2007 16:32:52 GMT (19kb) Date (revised v2): Tue, 27 Nov 2007 16:08:42 GMT (22kb) Title: Self-tuning vacuum variable and cosmological constant Authors: F.R. Klinkhamer, G.E. Volovik Categories: gr-qc hep-th Comments: 22 pages with revtex4 Report-no: KA-TP-29-2007 \\ A spacetime independent variable is introduced which characterizes the Lorentz-invariant self-sustained quantum vacuum. The self-tuning of this variable nullifies the effective energy density of the perfect quantum vacuum. The observed smallness of the cosmological constant may then be explained as corresponding to the effective energy density of an imperfect quantum vacuum (perturbed by, e.g., the presence of matter). \\ ( http://arxiv.org/abs/0711.3170 , 22kb) ------------------------------------------------------------------------------ \\ arXiv:0711.3994 (*cross-listing*) Date: Mon, 26 Nov 2007 13:05:45 GMT (452kb,D) Title: Blowup/scattering alternative for a discrete family of static critical solutions with various number of unstable eigenmodes Authors: Evgeny E. Donets, Edik A. Hayryan, Oksana I. Streltsova Categories: gr-qc hep-th math-ph math.AP math.MP Comments: 29 pages, 10 figures \\ Decay of regular static spherically symmetric solutions in the SU(2) Yang-Mills-dilaton (YMd) system of equations under the independent excitation of their unstable eigenmodes has been studied self-consistently in the nonlinear regime. The considered regular YMd solutions form a discrete family and can be parametrised by the number $N=1,2,3,4...$ of their unstable eigenmodes in linear approximation. We have obtained strong numerical evidences in favour of the following statements: i) all static YMd solutions are distinct local threshold configurations, separating blowup and scattering solutions; ii) the main unstable eigenmodes are only those responsible for the blowup/scattering alternative; iii) excitation of higher unstable eigenmodes always leads to finite-time blowup; iv) the decay of the lowest N=1 static YMd solution via excitation of its unique unstable mode is an exceptional case because the resulting waves propagate as a whole without energy dispersion revealing features peculiar to solitons. Applications of the obtained results to Type-I gravitational collapse of massless fields are briefly discussed. \\ ( http://arxiv.org/abs/0711.3994 , 452kb) ------------------------------------------------------------------------------ \\ arXiv:0711.4003 (*cross-listing*) Date: Mon, 26 Nov 2007 13:58:12 GMT (7kb) Title: Possibly Large Corrections to the Inflationary Observables Authors: N. Bartolo (Physics Dept. and INFN, Padova, Italy), A. Riotto (CERN, Switzerland and INFN Padova, Italy) Categories: astro-ph gr-qc hep-ph hep-th Comments: 4 pages, LateX file \\ We point out that the theoretical predictions for the inflationary observables may be generically altered by the presence of fields which are heavier than the Hubble rate during inflation and whose dynamics is usually neglected. They introduce corrections which may be easily larger than both the second-order contributions in the slow-roll parameters and the accuracy expected in the forthcoming experiments. \\ ( http://arxiv.org/abs/0711.4003 , 7kb) ------------------------------------------------------------------------------ \\ arXiv:0711.4115 (*cross-listing*) Date: Tue, 27 Nov 2007 14:23:50 GMT (18kb) Title: Path integral for half-binding potentials as quantum mechanical analog for black hole partition functions Authors: Daniel Grumiller Categories: quant-ph gr-qc hep-th Comments: 6 pages, proceedings contribution to "Path integrals - New Trends and Perspectives", Dresden, September 2007 Report-no: MIT-CTP 3913 \\ The semi-classical approximation to black hole partition functions is not well-defined, because the classical action is unbounded and the first variation of the uncorrected action does not vanish for all variations preserving the boundary conditions. Both problems can be solved by adding a Hamilton-Jacobi counterterm. I show that the same problem and solution arises in quantum mechanics for half-binding potentials. \\ ( http://arxiv.org/abs/0711.4115 , 18kb) ------------------------------------------------------------------------------ \\ arXiv:0711.4276 (*cross-listing*) Date: Tue, 27 Nov 2007 15:13:37 GMT (32kb) Title: The number of dimensional fundamental constants Authors: George E. A. Matsas, Vicente Pleitez, Alberto Saa, Daniel A. T. Vanzella Categories: physics.class-ph gr-qc hep-th physics.gen-ph Comments: 7 pages, 2 figures \\ We revisit, qualify, and objectively resolve the seemingly controversial question about what is the number of dimensional fundamental constants in Nature. For this purpose, we only assume that all we can directly measure are space and time intervals, and that this is enough to evaluate any physical observable. We conclude that the number of dimensional fundamental constants is two. We emphasize that this is an objective result rather than a "philosophical opinion", and we let it clear how it could be refuted in order to prove us wrong. Our conclusion coincides with Veneziano's string-theoretical one but our arguments are not based on any particular theory. As a result, this implies that one of the three usually considered fundamental constants "G", "c" or "h" can be eliminated and we show explicitly how this can be accomplished. \\ ( http://arxiv.org/abs/0711.4276 , 32kb) ------------------------------------------------------------------------------ \\ arXiv:0711.4284 (*cross-listing*) Date: Tue, 27 Nov 2007 16:27:18 GMT (50kb) Title: Integral Coefficients for One-Loop Amplitudes Authors: Ruth Britto, Bo Feng Categories: hep-ph hep-th Comments: 32 pages, 1 figure Report-no: ITFA-2007-53 \\ We present a set of algebraic functions for evaluating the coefficients of the scalar integral basis of a general one-loop amplitude. The functions are derived from unitarity cuts, but the complete cut-integral procedure has been carried out in generality so that it never needs to be repeated. Where the master integrals are known explicitly, the results here can be used as a black box with tree-level amplitudes as input and one-loop amplitudes as output. \\ ( http://arxiv.org/abs/0711.4284 , 50kb) ------------------------------------------------------------------------------ \\ arXiv:0711.4300 (*cross-listing*) Date: Tue, 27 Nov 2007 16:42:15 GMT (144kb) Title: Reconstruction of scalar potentials in two-field cosmological models Authors: Alexander A. Andrianov, Francesco Cannata, Alexander Y. Kamenshchik and Daniele Regoli Categories: gr-qc astro-ph hep-th Comments: 17 pages, 3 figures \\ We study the procedure of the reconstruction of phantom-scalar field potentials in two-field cosmological models. It is shown that while in the one-field case the chosen cosmological evolution defines uniquely the form of the scalar potential, in the two-field case one has an infinite number of possibilities. The classification of a large class of possible potentials is presented and the dependence of cosmological dynamics on the choice of initial conditions is investigated qualitatively and numerically for two particular models. \\ ( http://arxiv.org/abs/0711.4300 , 144kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:0706.2355 replaced with revised version Wed, 28 Nov 2007 15:38:07 GMT (11kb) Title: Supergravity origin of the MSSM inflation Authors: Kari Enqvist, Lotta Mether and Sami Nurmi Categories: hep-th astro-ph hep-ph Comments: v3: 10 pages, no figures; version accepted for publication. Typos corrected \\ ( http://arxiv.org/abs/0706.2355 , 11kb) ------------------------------------------------------------------------------ \\ arXiv:0707.0894 replaced with revised version Wed, 28 Nov 2007 01:33:42 GMT (316kb) Title: Hybrid compactifications and brane gravity in six dimensions Authors: Tsutomu Kobayashi, Yu-ichi Takamizu Categories: hep-th gr-qc Comments: 15 pages, 2 figures; v2: references added; v3: accepted for publication in Class. Quant. Grav Report-no: WU-AP/271/07 \\ ( http://arxiv.org/abs/0707.0894 , 316kb) ------------------------------------------------------------------------------ \\ arXiv:0707.1857 (*cross-listing*) replaced with revised version Wed, 28 Nov 2007 15:40:37 GMT (31kb) Title: On the triplet vertex algebra W(p) Authors: Drazen Adamovic and Antun Milas Categories: math.QA hep-th math-ph math.MP math.RT Comments: 32 pages; v2: a few minor changes, to appear in Advances in Mathematics \\ ( http://arxiv.org/abs/0707.1857 , 31kb) ------------------------------------------------------------------------------ \\ arXiv:0707.3433 (*cross-listing*) replaced with revised version Wed, 28 Nov 2007 16:27:39 GMT (15kb) Title: Integrable Lagrangians and modular forms Authors: E. V. Ferapontov and A. V. Odesskii Categories: nlin.SI hep-th math.AG math.DG math.NT Comments: 17 pages, latex \\ ( http://arxiv.org/abs/0707.3433 , 15kb) ------------------------------------------------------------------------------ \\ arXiv:0709.0536 (*cross-listing*) replaced with revised version Wed, 28 Nov 2007 16:47:29 GMT (60kb) Title: Quantum Gravity Corrections to the One Loop Scalar Self-Mass during Inflation Authors: E. O. Kahya and R. P. Woodard (University of Florida) Categories: gr-qc astro-ph hep-th Comments: 47 pages, 3 figures, 20 tables, uses LaTeX 2 epsilon, version 2 revised for publication in Physical Review D Report-no: UFIFT-QG-07-04 \\ ( http://arxiv.org/abs/0709.0536 , 60kb) ------------------------------------------------------------------------------ \\ arXiv:0709.2162 replaced with revised version Tue, 27 Nov 2007 21:41:41 GMT (9kb) Title: Closed-String Tachyon Condensation and the Worldsheet Super-Higgs Effect Authors: Petr Horava, Cynthia A. Keeler Categories: hep-th Comments: 4 pages; v2: typos corrected, a reference added; v3: final version, to appear in Phys. Rev. Lett. (abstract and intro modified for a broader audience) \\ ( http://arxiv.org/abs/0709.2162 , 9kb) ------------------------------------------------------------------------------ \\ arXiv:0710.0707 replaced with revised version Wed, 28 Nov 2007 12:04:52 GMT (212kb) Title: New branch of Kaluza-Klein compactification Authors: Shunichiro Kinoshita Categories: hep-th gr-qc Comments: 6 pages, 3 figures, REVTeX4;version accepted for publication in PRD Report-no: UTAP-586, RESCEU-86/07 \\ ( http://arxiv.org/abs/0710.0707 , 212kb) ------------------------------------------------------------------------------ \\ arXiv:0710.2551 replaced with revised version Tue, 27 Nov 2007 23:17:08 GMT (52kb) Title: On general flux backgrounds with localized sources Authors: Giovanni Villadoro and Fabio Zwirner Categories: hep-th Comments: 29 pages, 2 figures, v2: published version Report-no: DFPD-07/TH/17 Journal-ref: JHEP11(2007)082 \\ ( http://arxiv.org/abs/0710.2551 , 52kb) ------------------------------------------------------------------------------ \\ arXiv:0710.4471 replaced with revised version Wed, 28 Nov 2007 18:36:54 GMT (196kb) Title: Holographic flavor in theories with eight supercharges Authors: Diego Rodriguez-Gomez Categories: hep-th Comments: Invited review submitted to IJMPA Report-no: PUTP-2240 Journal-ref: IJMPA, Vol. 22, pages 4717-4796 (2007) \\ ( http://arxiv.org/abs/0710.4471 , 196kb) ------------------------------------------------------------------------------ \\ arXiv:0711.1298 replaced with revised version Wed, 28 Nov 2007 20:13:03 GMT (44kb) Title: Gauge/Gravity Theory with Running Dilaton and Running Axion Authors: Girma Hailu Categories: hep-th Comments: 25 pages, typos fixed and minor simplifications \\ ( http://arxiv.org/abs/0711.1298 , 44kb) ------------------------------------------------------------------------------ \\ arXiv:0711.2206 replaced with revised version Wed, 28 Nov 2007 10:53:18 GMT (17kb) Title: Covariant particle statistics and intertwiners of the kappa-deformed Poincare algebra Authors: C. A. S. Young, R. Zegers Categories: hep-th Comments: 16 pages, latex; v2, references added Report-no: DCPT-07/59 \\ ( http://arxiv.org/abs/0711.2206 , 17kb) ------------------------------------------------------------------------------ \\ arXiv:0711.3059 replaced with revised version Wed, 28 Nov 2007 02:28:43 GMT (15kb) Title: Domain wall solitons and Hopf algebraic translational symmetries in noncommutative field theories Authors: Yuya Sasai, Naoki Sasakura Categories: hep-th Comments: 20 pages, no figures, references added Report-no: YITP-07-78 \\ ( http://arxiv.org/abs/0711.3059 , 15kb) ------------------------------------------------------------------------------ \\ arXiv:0711.3895 (*cross-listing*) replaced with revised version Wed, 28 Nov 2007 07:22:35 GMT (17kb) Title: Hidden Local Symmetry and Dense Half-Skyrmion Matter Authors: Mannque Rho Categories: nucl-th hep-ph hep-th Comments: 6 pages, 1 figure, 1 reference corrected \\ ( http://arxiv.org/abs/0711.3895 , 17kb) ------------------------------------------------------------------------------ \\ arXiv:0711.4273 replaced with revised version Wed, 28 Nov 2007 14:37:39 GMT (579kb) Title: Non critical holographic models of the thermal phases of QCD Authors: Victoria Mazu and Jacob Sonnenschein Categories: hep-th Comments: 11 figure \\ ( http://arxiv.org/abs/0711.4273 , 579kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- For subscribe options to combined physics archives, e-mail To: physics@arXiv.org, Subject: subscribe ----------------------------------------------------------------------------- For help on viewing and making submissions, see http://arXiv.org/help/ For a list of archive mirror sites, see http://arXiv.org/servers.html ----------------------------------------------------------------------------- Third-party submissions cause excessive problems. 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