Physical sciences topic list of research papers
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Brane cosmological evolution with bulk matter
Abstract We consider the cosmological evolution of a brane for general bulk matter content. In our setup the bulk pressure and the energy exchange densities are comparable to the brane energy density. Adopting a phenomenological fluid ansatz and...
2007 / C. Bogdanos, K. Tamvakis -
QCD condensates from τ-decay data: a functional approach
Abstract We study a functional method to extract the V−A condensate of dimension 6 from a comparison of τ-decay data with the asymptotic space-like QCD prediction. Our result is in agreement within errors with that from conventional analyses based...
2004 / S. Ciulli, C. Sebu, K. Schilcher, H. Spiesberger -
Antihydrogen production temperature dependence
Abstract Cold antihydrogen atoms were produced by mixing cold samples of antiprotons and positrons. The temperature of the positron plasma was increased by controlled radio-frequency (RF) heating, and the antihydrogen production was measured....
2004 / M Amoretti, C Amsler, G Bazzano, G Bonomi, A Bouchta, et al. -
Application of the generalized two-center cluster model to 10Be
Abstract A generalized two-center cluster model (GTCM), including various partitions of the valence nucleons around two α-cores, is proposed for studies on the exotic cluster structures of Be isotopes. This model is applied to the ...
2004 / M. Ito, K. Kato, K. Ikeda -
Unitary evolution of perturbations of a two-dimensional black hole
Abstract We discuss massive scalar perturbations of a two-dimensional dilaton black hole. We employ a Pauli–Villars regularization scheme to calculate the effect of the scalar perturbation on the Bekenstein–Hawking entropy. By concentrating on the...
2006 / George Siopsis -
The weak energy condition and the expansion history of the Universe
Abstract We examine flat models containing a dark matter component and an arbitrary dark energy component, subject only to the constraint that the dark energy satisfies the weak energy condition. We determine the constraints that these conditions...
2007 / A.A. Sen, Robert J. Scherrer -
Search for solar axions produced by Primakoff conversion using resonant absorption by 169Tm nuclei
Abstract The search for resonant absorption of the Primakoff solar axions by 169Tm nuclei have been performed. Such an absorption should lead to the excitation of low-lying nuclear energy level: A + ...
2009 / A.V. Derbin, S.V. Bakhlanov, A.I. Egorov, I.A. Mitropol'sky, V.N. Muratova, et al. -
Phases of augmented hadronic light-front wave functions
Abstract It is an important question whether the final/initial state gluonic interactions which lead to naive-time-reversal-odd single-spin asymmetries and diffraction at leading twist can be associated in a definite way with the light-front wave...
2010 / Stanley J. Brodsky, Barbara Pasquini, Bo-Wen Xiao, Feng Yuan -
A consistent dynamical model for pion-photoproduction
Abstract Pion-photoproduction amplitude is calculated within a consistent isobar model already used to fix the Δ + ...
2007 / A. Mariano -
Pentaquark symmetries, selection rules and another potentially narrow state
Abstract We identify essential differences between the pentaquark and chiral soliton models of 10 ...
2004 / F.E. Close, J.J. Dudek -
How to measure the parity of the Θ+ in p→p→ collisions
Abstract Triggered by a recent paper by Thomas, Hicks and Hosaka, we investigate which observables can be used to determine the parity of the Θ + from the reaction p ...
2004 / C. Hanhart, M. Büscher, W. Eyrich, K. Kilian, U.-G. Meißner, et al. -
Chaos in the color glass condensate
Abstract The number of gluons in the hadron wave function is discrete, and their formation in the chain of small x evolution occurs over discrete rapidity intervals of Δ y ≃ ...
2005 / Dmitri Kharzeev, Kirill Tuchin -
Chaplygin inflation on the brane
Abstract Brane inflationary universe model in the context of a Chaplygin gas equation of state is studied. General conditions for this model to be realizable are discussed. In the high-energy limit and by using a chaotic potential we describe in...
2008 / Ramón Herrera -
Physical meaning of two-particle HBT measurements in case of correlated emission
Abstract It is shown that, in the presence of correlations in particle emission, the measured HBT radii are related to the correlation range rather than to the size of the interaction volume. Only in the case of weak correlations the standard...
2004 / A. Bialas, K. Zalewski -
de Sitter vacua from matter superpotentials
Abstract Consistent uplifting of AdS vacua in string theory often requires extra light degrees of freedom in addition to those of a (Kähler) modulus. Here we consider the possibility that de Sitter and Minkowski vacua arise due to hidden sector...
2006 / Oleg Lebedev, Hans Peter Nilles, Michael Ratz -
Thermodynamics of rotating black branes in Gauss–Bonnet–nonlinear Maxwell gravity
Abstract We consider the Gauss–Bonnet gravity in the presence of a new class of nonlinear electromagnetic field, namely, power Maxwell invariant. By use of a suitable transformation, we obtain a class of real rotating solutions with k rotation...
2010 / S.H. Hendi, B. Eslam Panah -
Five-dimensional superfield supergravity
Abstract We present a projective superspace formulation for matter-coupled simple supergravity in five dimensions. Our starting point is the superspace realization for the minimal supergravity multiplet proposed by Howe in 1981. We introduce various ...
2008 / Sergei M. Kuzenko, Gabriele Tartaglino-Mazzucchelli -
Nuclear incompressibility at finite temperature and entropy
Abstract Features of the nuclear isothermal incompressibility κ and adiabatic incompressibility κ Q are investigated. The...
2005 / A.Z. Mekjian, S.J. Lee, L. Zamick -
Elastic and large t rapidity gap vector meson production in ultraperipheral proton–ion collisions
Abstract We evaluate the cross sections for the production of vector mesons in exclusive ultraperipheral proton–ion collisions at LHC. We find that the rates are high enough to study the energy and momentum transfer dependence of vector meson ( ...
2006 / L. Frankfurt, M. Strikman, M. Zhalov -
X(3): an exactly separable γ-rigid version of the X(5) critical point symmetry
Abstract A γ-rigid version (with γ = 0 ) of the X(5) critical point symmetry is constructed. The model, to be called X(3) since it is proved to contain...
2005 / Dennis Bonatsos, D. Lenis, D. Petrellis, P.A. Terziev, I. Yigitoglu