Physical sciences topic list of research papers
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Kaon thresholds and two-flavor chiral expansions for hyperons
Abstract Two-flavor chiral expansions provide a useful perturbative framework to study hadron properties. Such expansions should exhibit marked improvement over the conventional three-flavor chiral expansion. Although one can theoretically formulate ...
2010 / F.-J. Jiang, B.C. Tiburzi, A. Walker-Loud -
Entanglement redistribution in the Schwarzschild spacetime
Abstract The effect of Hawking radiation on the redistribution of the entanglement and mutual information in the Schwarzschild spacetime is investigated. Our analysis shows that the physically accessible correlations degrade while the unaccessible...
2010 / Jieci Wang, Qiyuan Pan, Jiliang Jing -
Kähler corrections for the volume modulus of flux compactifications
Abstract No-scale models arise in many compactifications of string theory and supergravity, the most prominent recent example being type IIB flux compactifications. Focussing on the case where the no-scale field is a single unstabilized volume...
2005 / G. von Gersdorff, A. Hebecker -
Hybrid quintessential inflation
Abstract A model is presented in which a single scalar field is responsible for both primordial inflation at early times and then dark energy at late times. This field is coupled to a second scalar field which becomes unstable and starts to...
2009 / Mar Bastero-Gil, Arjun Berera, Brendan M. Jackson, Andy Taylor -
Coherent effects in crystal collimation
Abstract We present theory for coherent effects observed in crystal collimation experiments that is in good quantitative agreement with the RHIC and Tevatron data. We show that these effects are caused by a coherent scattering on the field of bent...
2006 / V.M. Biryukov -
N-spheres in general relativity: Regular black holes without apparent horizons, static wormholes with event horizons and gravastars with a tube-like core
Abstract We consider a way to avoid black hole singularities by gluing a black hole exterior to an interior with a tube-like geometry consisting of a direct product of two-dimensional AdS, dS, or Rindler spacetime with a two-sphere of constant...
2006 / O.B. Zaslavskii -
Neumann Casimir effect: A singular boundary-interaction approach
Abstract Dirichlet boundary conditions on a surface can be imposed on a scalar field, by coupling it quadratically to a δ-like potential, the strength of which tends to infinity. Neumann conditions, on the other hand, require the introduction of an...
2010 / C.D. Fosco, F.C. Lombardo, F.D. Mazzitelli -
Conformal Hamiltonian dynamics of general relativity
Abstract The General Relativity formulated with the aid of the spin connection coefficients is considered in the finite space geometry of similarity with the Dirac scalar dilaton. We show that the redshift evolution of the General Relativity...
2010 / A.B. Arbuzov, B.M. Barbashov, R.G. Nazmitdinov, V.N. Pervushin, A. Borowiec, et al. -
Constraints on light Majorana dark matter from colliders
Abstract We explore model-independent collider constraints on light Majorana dark matter particles. We find that colliders provide a complementary probe of WIMPs to direct detection, and give the strongest current constraints on light DM particles....
2010 / Jessica Goodman, Masahiro Ibe, Arvind Rajaraman, William Shepherd, Tim M.P. Tait, et al. -
On the re-summation of enhanced pomeron diagrams
Abstract Dominant contributions of enhanced pomeron diagrams to elastic hadron–hadron scattering amplitude are re-summed to all orders. The formalism is applied to calculate total hadronic cross sections and elastic scattering slopes. An agreement...
2006 / S. Ostapchenko -
Dark energy and the nature of the graviton
Abstract Does the existence of dark energy suggest that there is more to the graviton than we think we know?
2004 / A. Zee -
Probing the partonic structure of pentaquarks in hard electroproduction
Abstract Exclusive electroproduction of a K or K∗ meson on the nucleon can give a Θ + pentaquark in the final state. This reaction offers an opportunity to investigate the structure of pentaquark baryons at ...
2004 / M. Diehl, B. Pire, L. Szymanowski -
A supersymmetry model of leptons
Abstract If supersymmetry (SUSY) is not for stabilizing the electroweak energy scale, what is it used for in particle physics? We propose that it is for flavor problems. A cyclic family symmetry is introduced. Under the family symmetry, only the...
2005 / Chun Liu -
Looking for a heavy higgsino LSP in collider and dark matter experiments
Abstract A large part of the mSUGRA parameter space satisfying the WMAP constraint on the dark matter relic density corresponds to a higgsino LSP of mass ≃ 1 ...
2005 / Utpal Chattopadhyay, Debajyoti Choudhury, Manuel Drees, Partha Konar, D.P. Roy -
The charm quark mass from non-relativistic sum rules
Abstract We present an analysis to determine the charm quark mass from non-relativistic sum rules, using a combined approach taking into account fixed-order and effective-theory calculations. Non-perturbative corrections as well as higher-order...
2009 / Adrian Signer -
Holographic dark energy and cosmic coincidence
Abstract In this Letter we demonstrate that any interaction of pressureless dark matter with holographic dark energy, whose infrared cutoff is set by the Hubble scale, implies a constant ratio of the energy densities of both components thus solving...
2005 / Diego Pavón, Winfried Zimdahl -
Secondary scintillation yield in pure argon
Abstract The secondary scintillation yield is of great importance for simulating double phase detectors, which are used in several of the ongoing Dark Matter search experiments, as well as in the future large-scale particle detectors proposed in...
2008 / C.M.B. Monteiro, J.A.M. Lopes, J.F.C.A. Veloso, J.M.F. dos Santos -
New formulation of the first law of black hole thermodynamics: a stringy analogy
Abstract We consider the first laws of thermodynamics for a pair of systems made up of the two horizons of a Kerr–Newman black hole. These two systems are constructed in such a way that we only demand their “horizon areas” to be the sum and...
2005 / Shuang-Qing Wu -
Energy dependence of the level density parameter
Abstract Combinatorial level densities are calculated using a fixed level scheme for several nuclei to study the energy dependence of the level density parameter when the nucleus is either doubly magic, nearly magic or non-magic. It is shown that...
2004 / S. Hilaire -
Unparticle effects in photon–photon scattering
Abstract Elastic photon–photon scattering can occur in the Standard Model only via loop diagrams and is naturally suppressed. Unparticle can induce tree-level photon–photon scattering through the operator ...
2008 / Chun-Fu Chang, Kingman Cheung, Tzu-Chiang Yuan