Physical sciences topic list of research papers
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On the analysis of intermediate–energy Coulomb excitation experiments
Abstract In a recent publication [C.A. Bertulani, G. Cardella, M. De Napoli, G. Raciti, E. Rapisarda, Phys. Lett. B 650 (2007) 233] the validity of analysis methods used for intermediate-energy Coulomb excitation experiments was called into...
2007 / Heiko Scheit, Alexandra Gade, Thomas Glasmacher, Tohru Motobayashi -
Double volume reflection of a proton beam by a sequence of two bent crystals
Abstract The doubling of the angle of beam deflection due to volume reflection of protons by a sequence of two bent silicon crystals was experimentally observed at the 400 GeV proton beam of the CERN SPS. A similar sequence of short bent crystals...
2007 / Walter Scandale, Alberto Carnera, Gianantonio Della Mea, Davide De Salvador, Riccardo Milan, et al. -
Quantum and classical divide: the gravitational case
Abstract We study the transition between quantum and classical behaviour of particles in a gravitational quantum well. We analyze how an increase in the particles mass turns the energy spectrum into a continuous one, from an experimental point of...
2005 / O. Bertolami, J.G. Rosa -
Improved chiral properties of FLIC fermions
Abstract The chiral properties of the fat-link irrelevant clover (FLIC) fermion action are examined. The improved chiral properties of fermion actions incorporating smoothed links are realised in the FLIC action where only the irrelevant operators...
2005 / S. Boinepalli, W. Kamleh, D.B. Leinweber, A.G. Williams, J.M. Zanotti -
Gravitino dark matter in the CMSSM
Abstract We consider the possibility that the gravitino might be the lightest supersymmetric particle (LSP) in the constrained minimal extension of the Standard Model (CMSSM). In this case, the next-to-lightest supersymmetric particle (NSP) would be ...
2004 / John Ellis, Keith A. Olive, Yudi Santoso, Vassilis C. Spanos -
Optimal-observable analysis of possible new physics using the b-quark in γγ→tt̄→bX
Abstract We study possible anomalous top-quark couplings generated by SU(2)×U(1) gauge-invariant dimension-6 effective operators, using the final b-quark momentum distribution in γγ→t t ̄ ...
2004 / Bohdan Grzadkowski, Zenrō Hioki, Kazumasa Ohkuma, José Wudka -
Aharonov–Bohm effect and nucleon–nucleon phase shifts on the lattice
Abstract We propose a method for the lattice QCD computation of nucleon–nucleon low-energy interactions. It consists in simulating QCD in the background of a “electromagnetic” field whose potential is non-vanishing, but whose field strength is zero. ...
2004 / Paulo F. Bedaque -
On the growth of linear perturbations
Abstract We consider the linear growth of matter perturbations in various dark energy (DE) models. We show the existence of a constraint valid at z = 0 ...
2008 / David Polarski, Radouane Gannouji -
Evolution of coupled classical fields
Abstract We study the evolution of the coupled scalar and fermion fields within the classical field theory. We examine the case of N coupled fields in ( 1 + ...
2005 / Maxim Dvornikov -
Big-bang nucleosynthesis and WIMP dark matter in modified gravity
Abstract In the present work the primordial Big-Bang Nucleosynthesis (BBN) and weakly interacting massive particle (WIMP) dark matter are discussed in a certain class of modified gravitational theories, namely f ...
2009 / Jin U Kang, Grigoris Panotopoulos -
Resonance radiative decays as a tool for its parity determination
Abstract Radiative decays of the spin 1/2 baryonic resonances R with the decay mode R → K N in case of small energy release are...
2005 / B.L. Ioffe, A.V. Samsonov -
Erratum to: “Weak corrections to gluon-induced top–antitop hadro-production” [Phys. Lett. B 639 (2006) 513]
Abstract This is an Erratum to a Letter of ours [S. Moretti, M.R. Nolten, D.A. Ross, Phys. Lett. B 639 (2006) 513]. After its publication, we have discovered a mistake in a numerical program that affects the results presented therein. We provide...
2007 / S. Moretti, M.R. Nolten, D.A. Ross -
Induced fractional zero-point angular momentum for charged particles of the Bohm–Aharonov system by means of a “spectator” magnetic field
Abstract An induced fractional zero-point angular momentum of charged particles by the Bohm–Aharonov (BA) vector potential is realized via a modified combined trap. It explores a “spectator” mechanism in this type of quantum effects: In the limit of ...
2008 / Jian-Zu Zhang -
Area spectrum of near-extremal SdS black holes via the new interpretation of quasinormal modes
Abstract Motivated by the recent work about a new physical interpretation of quasinormal modes by Maggiore, we investigate the quantization of near-extremal Schwarzschild–de Sitter black holes in the four-dimensional spacetime. Following...
2009 / Wenbo Li, Lixin Xu, Jianbo Lu -
Difference between the triton beta decay constants in atomic and molecular tritium measured by the helium isotope method
Abstract The results are given for an experiment on measuring the difference between the values of triton beta decay constant in atomic and molecular tritium, Δ λ ...
2004 / Yu.A. Akulov, B.A. Mamyrin -
μ–τ symmetry and maximal CP violation
Abstract We argue the possibility that a real part of a flavor neutrino mass matrix only respects a μ–τ symmetry. This possibility is shown to be extended to more general case with a phase parameter θ, where the μ–τ symmetric part has a phase of ...
2005 / Teruyuki Kitabayashi, Masaki Yasuè -
Seesaw enhancement of bi-large mixing in two-zero textures
Abstract The seesaw enhancement of the bi-large mixings are discussed for the two-zero textures of the neutrino mass matrix. There are no large mixings in both Dirac neutrino mass matrix m D ...
2004 / Mizue Honda, Satoru Kaneko, Morimitsu Tanimoto -
A note on simple applications of the Killing spinor identities
Abstract We show how the Killing Spinor Identities (KSI) can be used to reduce the number of independent equations of motion that need to be checked explicitly to make sure that a supersymmetric configuration is a classical supergravity solution. We ...
2005 / Jorge Bellorín, Tomás Ortín -
Derivation of covariant dissipative fluid dynamics in the renormalization-group method
Abstract We derive generic relativistic hydrodynamical equations with dissipative effects from the underlying Boltzmann equation in a mechanical and systematic way on the basis of so-called the renormalization-group method. A macroscopic frame...
2007 / T. Tsumura, T. Kunihiro, K. Ohnishi -
Measurement of the in-medium ϕ-meson width in proton–nucleus collisions
Abstract The production of ϕ mesons in the collisions of 2.83 GeV protons with C, Cu, Ag, and Au at forward angles has been measured via the ϕ → K ...
2010 / A. Polyanskiy, M. Hartmann, Yu.T. Kiselev, E.Ya. Paryev, M. Büscher, et al.