Physical sciences topic list of research papers
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Nuclear effects on the longitudinal structure function at small x
Abstract We discuss the longitudinal structure function in nuclear DIS at small x. We work within the framework of universal parton densities obtained in DGLAP analyses at NLO. We show that the nuclear effects on the longitudinal structure function...
2010 / Néstor Armesto, Hannu Paukkunen, Carlos A. Salgado, Konrad Tywoniuk -
The supergravity fields for a D-brane with a travelling wave from string amplitudes
Abstract We calculate the supergravity fields sourced by a D-brane with a null travelling wave from disk amplitudes in type IIB string theory compactified on T 4 ...
2010 / William Black, Rodolfo Russo, David Turton -
The Casimir force on a piston in the spacetime with extra compactified dimensions
Abstract A Casimir piston for massless scalar fields obeying Dirichlet boundary conditions in high-dimensional spacetimes within the frame of Kaluza–Klein theory is analyzed. We derive and calculate the exact expression for the Casimir force on the...
2008 / Hongbo Cheng -
Multi-phonon γ-vibrational bands in odd-mass nuclei studied by triaxial projected shell model approach
Abstract Inspired by the recent experimental data [J.-G. Wang, et al., Phys. Lett. B 675 (2009) 420], we extend the triaxial projected shell model approach to study the γ-band structure in odd-mass nuclei. As a first application of the new...
2010 / J.A. Sheikh, G.H. Bhat, Y. Sun, R. Palit -
Chiral perturbation theory for pentaquark baryons and its applications
Abstract We construct a chiral Lagrangian for pentaquark baryons assuming that the recently found Θ + ( ...
2005 / P. Ko, Jungil Lee, Taekoon Lee, Jae-Hyeon Park -
Incorporating memory effects in phase separation processes
Abstract We consider the modification of the Cahn–Hilliard equation when a time delay process through a memory function is taken into account. We then study the process of spinodal decomposition in fast phase transitions associated with a conserved...
2006 / T. Koide, G. Krein, Rudnei O. Ramos -
Long-lived unstable superparticles at the LHC
Abstract In various models of supersymmetry (SUSY), the lightest superparticle in the minimal SUSY standard model sector, which we call MSSM-LSP, becomes unstable. Then, we may observe the decay of the MSSM-LSP in the detector at the LHC experiment. ...
2008 / Koji Ishiwata, Takumi Ito, Takeo Moroi -
Full one-loop corrections to the relic density in the MSSM: A few examples
Abstract We show the impact of the electroweak, and in one instance the QCD, one-loop corrections on the relic density of dark matter in the MSSM which is provided by the lightest neutralino. We cover here some of the most important scenarios:...
2008 / N. Baro, F. Boudjema, A. Semenov -
On the description of exclusive processes beyond the leading twist approximation
Abstract We describe hard exclusive processes beyond the leading twist approximation in a framework based on the Taylor expansion of the amplitude around the dominant light-cone directions. This naturally introduces an appropriate set of...
2009 / I.V. Anikin, D.Yu. Ivanov, B. Pire, L. Szymanowski, S. Wallon -
Noncommutative chaotic inflation and WMAP three year results
Abstract Noncommutative inflation is based upon the consideration of some effects of the space–time uncertainty principle motivated by ideas from string/M theory. The CMB anisotropies may carry a signature of this very early Universe correction from ...
2006 / Xin Zhang, Feng-Quan Wu -
Stau-catalyzed 6Li production in big-bang nucleosynthesis
Abstract If the gravitino mass is in the region from a few GeV to a few 10's GeV, the scalar lepton X such as stau is most likely the next lightest supersymmetry particle. The negatively charged and long-lived ...
2007 / K. Hamaguchi, T. Hatsuda, M. Kamimura, Y. Kino, T.T. Yanagida -
The role of the nucleon recoil in low-energy meson–nucleus reactions
Abstract The role of the nucleon recoil corrections in low-energy meson–nucleus interactions is examined. We demonstrate explicitly when calculations within the static approximation are justified and when the recoil terms need to be kept explicitly...
2004 / V. Baru, C. Hanhart, A.E. Kudryavtsev, U.-G. Meißner -
Nuclear structure of 178Hf related to the spin-16, 31-year isomer
Abstract The projected shell model is used to study the multi-quasiparticle and collective excitations of 178Hf. With an axially symmetric basis, the spin-16 isomer at 2.4 MeV appears to be well separated in energy/spin space from other...
2004 / Yang Sun, Xian-Rong Zhou, Gui-Lu Long, En-Guang Zhao, Philip M. Walker -
A simple derivation of supersymmetric extremal black-hole attractors
Abstract We present a simple and yet rigorous derivation of the flow equations for the supersymmetric black-hole solutions of all 4-dimensional supergravities based on the recently found general form of all those solutions. ...
2011 / Tomás Ortín -
On climbing scalars in String Theory
Abstract In string models with “brane supersymmetry breaking” exponential potentials emerge at (closed-string) tree level but are not accompanied by tachyons. Potentials of this type have long been a source of embarrassment in flat space, but can...
2010 / E. Dudas, N. Kitazawa, A. Sagnotti -
Solving the SUSY flavour and CP problems with non-Abelian family symmetry and supergravity
Abstract Can a theory of flavour capable of describing the spectrum of fermion (including neutrino) masses and mixings also contain within it the seeds for a solution of the SUSY flavour and CP problems? We argue that supergravity together with a...
2008 / Stefan Antusch, Stephen F. King, Michal Malinský, Graham G. Ross -
Gauge invariant regularization in the AdS/CFT correspondence and ghost D-branes
Abstract A field theoretic understanding of how the radial direction in the AdS/CFT correspondence plays the role of a gauge invariant measure of energy scale has long been missing. In SU ( ...
2006 / Nick Evans, Tim R. Morris, Oliver J. Rosten -
Ultraviolet modified photons and anisotropies in the cosmic microwave background radiation
Abstract We discuss a minimal canonical modification of electrodynamics in order to account for ultraviolet Lorentz violating effects. This modification creates a birefringence that rotates the polarization planes from different directions. Such...
2006 / J. Gamboa, J. López-Sarrión, A.P. Polychronakos -
Neutron–proton analyzing power at 12 MeV and inconsistencies in parametrizations of nucleon–nucleon data
Abstract We present the most accurate and complete data set for the analyzing power A y ( θ ...
2008 / R.T. Braun, W. Tornow, C.R. Howell, D.E. González Trotter, C.D. Roper, et al. -
Master integrals for massless three-loop form factors: One-loop and two-loop insertions
Abstract The three-loop form factors in massless QCD can be expressed as a linear combination of master integrals. Besides a number of master integrals which factorise into products of one-loop and two-loop integrals, one finds 16 genuine three-loop ...
2006 / T. Gehrmann, G. Heinrich, T. Huber, C. Studerus