119255085
Holography of a composite inflaton
We study the time evolution of a brane construction that is holographically dual to a strongly coupled gauge theory that dynamically breaks a global symmetry through the generation of an effective composite Higgs vev. The D3/D7 system with a background magnetic field or non-trivial gauge coupling (dilaton) profile displays the symmetry breaking. We study motion of the D7 brane in the background of the D3 branes. For small field inflation in the field theory the effective Higgs vev rolls from zero to the true vacuum value. We study what phenomenological dilaton profile generates the slow rolling needed, hence learning how the strongly coupled gauge theory’s coupling must run. We note that evolution of our configuration in the holographic direction, representing the phyiscs of the strong interactions, can provide additional slowing of the roll time. Inflation seems to be favoured if the coupling changes by only a small amount or very gently. We speculate on how such a scenario could be realized away from N=4 gauge theory, for example, in a walking gauge theory.
119206061
Hadronization at the AdS wall
We describe hadronization events, using the AdS/CFT Correspondence, which display many of the qualitative features expected in QCD. In particular we study the motion of strings with separating end points in a back-reacted hard wall geometry. The solutions show the development of a linear QCD-like string. The end points oscillate in the absence of string breaking. We introduce string breaking by hand and evolve the new state forward in time to observe the separation of two string segments. A kink associated with this breaking evolves to the end points of the string inducing rho meson production. We explicitly compute the rho meson production at the end point.
118419469
Inflation from Strongly Coupled Gauge Dynamics
We argue, using a phenomenological holographic approach, that walking, strongly coupled gauge theories generate a suitable potential for a small field inflation model. We show that the effective description is a model of a single inflaton. We determine the tunings necessary in the gauge sector to generate inflation and overcome the \eta problem.
122854596
STRIPPING REACTIONS AND THE STRUCTURE OF LIGHT AND INTERMEDIATE NUCLEI
A reduced width connecting two nuclear levels contains information about the structure of the states involved. Techniques are described whereby such information can be cast into useable form: the formalism so developed is then applied to an analysis of stripping widths. The various kinds of information about the structure of nuclei which can be obtained from an analysis of stripping widths are reviewed and what is known about the single-particle reduced widths is collected and summarized. A number of experiments of particuiar interest for future study are discussed. (W.D.M.)
122139204
Validity of random matrix theories for many-particle systems
Abstract The assumption of statistical independence of matrix elements leads to ensembles of Hamiltonians which involve simultaneous interactions between many particles. Then, for example, the resultant (semicircular) spectra are quite different from the Gaussian spectra found for ensembles properly restricted to involve only two-body interactions.
117307065
Compound-nuclear tests of time reversal invariance in the nucleon-nucleon interaction
The theory for the effects of time-reversal noninvariance (TRNI) in complex systems is reviewed. Applied to the compound-nuclear data for energy-level, width and cross-section fluctuations (the latter for detailed-balance pairs of reactions proceeding through the compound nucleus) this gives bounds on multiparticle TRNI Hamiltonian matrix elements. Using a fluctuation-free form of statistical spectroscopy the results are reduced to bounds on ..cap alpha.., the relative magnitude of the TRNI nucleon-nucleon interaction. The level and width analyses for heavy nuclei gave ..cap alpha.. less than or equal to 2 x 10/sup -3/ at high (approx.99%) statistical confidence; preliminary calculations for detailed balance with /sup 24/Mg(..cap alpha..,p)/sup 27/Al and its inverse gives ..cap alpha.. less than or equal to 4 x 10/sup -3/ at the same high confidence, but less than or equal to0.2 x 10/sup -3/ at 80% confidence. Suggestions are made about experiments which should yield sharper bounds. 28 refs., 1 tab.