Physical sciences topic list of research papers
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Decaying dark matter baryons in a composite messenger model
Abstract A baryonic bound state with a mass of O ( 100 ) TeV , which is composed of strongly interacting...
2009 / Koichi Hamaguchi, Eita Nakamura, Satoshi Shirai, T.T. Yanagida -
Probing high-density behavior of symmetry energy from pion emission in heavy-ion collisions
Abstract Within the framework of the improved isospin dependent quantum molecular dynamics (ImIQMD) model, the emission of pion in heavy-ion collisions in the region 1 A GeV as a probe of nuclear symmetry energy at supra-saturation densities is...
2009 / Zhao-Qing Feng, Gen-Ming Jin -
Direct photons at forward rapidities in high-energy pp collisions
Abstract We investigate direct photon production in pp collisions at the energies of RHIC, CDF and LHC, at different rapidities employing various color-dipole models. The cross section peaks at forward rapidities due to the Abelian dynamics of...
2009 / B.Z. Kopeliovich, E. Levin, A.H. Rezaeian, Ivan Schmidt -
Isotropic coordinates for Schwarzschild black hole radiation
Abstract The isotropic coordinate system of Schwarzschild spacetime has several attractive properties similar with the Painlevé–Gullstrand coordinates. The purpose for us to choose the isotropic coordinates is to resolve the ambiguities of the...
2007 / FuJun Wang, YuanXing Gui, ChunRui Ma -
On the incompatibility between quantum theory and general relativity
Abstract The aim of this work is to review the concepts of time in quantum field theory and general relativity to show their incompatibility. We prove that the absolute character of Newtonian time is present in quantum mechanics and also partially...
2008 / Alfredo Macías, Abel Camacho -
Interaction between scalar field and ideal fluid with inhomogeneous equation of state
Abstract In this Letter we study a model of interaction between the scalar field and an inhomogeneous ideal fluid. We have considered two forms of the ideal fluid and a power law expansion for the scale factor. We have solved the equations for the...
2008 / Writambhara Chakraborty, Ujjal Debnath -
Lee–Wick theories at high temperature
Abstract An extension of the standard model, the Lee–Wick standard model, based on ideas of Lee and Wick was recently introduced. It does not contain quadratic divergences in the Higgs mass and hence solves the hierarchy puzzle. The Lee–Wick...
2009 / Bartosz Fornal, Benjamín Grinstein, Mark B. Wise -
Radiative CP phases in supergravity theories
Abstract In this Letter, we point out that possible sources of CP violation originate from radiative corrections to soft terms which are ubiquitous in supergravity theories and also in other high-energy frameworks of supersymmetry breaking. With...
2004 / Motoi Endo, Masahiro Yamaguchi, Koichi Yoshioka -
New observables in longitudinal single-spin asymmetries in semi-inclusive DIS
Abstract We analyze longitudinal beam and target single-spin asymmetries in semi-inclusive deep inelastic scattering and in jet deep inelastic scattering, including all possible twist-3 contributions as well as quark mass corrections. We take into...
2004 / Alessandro Bacchetta, P.J. Mulders, Fetze Pijlman -
The effects of Gribov copies in 2D gauge theories
Abstract In previous works, we have motivated that the Gribov–Zwanziger action, which implements the restriction of the domain of integration in the path integral to the Gribov region, generates extra dynamical effects which influence the infrared...
2009 / D. Dudal, S.P. Sorella, N. Vandersickel, H. Verschelde -
A note on charmed and bottomed pentaquark production by fragmentation
Abstract H1 Collaboration recently observed the charmed pentaquark. In this short Letter, we point out that the dominant production mechanism for pentaquark consisting of a heavy quark is heavy quark fragmentation. We obtain a crude estimate on the...
2004 / Kingman Cheung -
Transitions between vortex rings, and monopole–antimonopole chains
Abstract In monopole–antimonopole chain solutions of SU ( 2 ) Yang–Mills–Higgs theory the Higgs field vanishes at m isolated...
2006 / Jutta Kunz, Ulrike Neemann, Yasha Shnir -
Effects of isospin and momentum dependent interactions on liquid–gas phase transition in hot asymmetric nuclear matter
Abstract The liquid–gas phase transition in hot neutron-rich nuclear matter is investigated within a self-consistent thermal model using an isospin and momentum dependent interaction (MDI) constrained by the isospin diffusion data in heavy-ion...
2007 / Jun Xu, Lie-Wen Chen, Bao-An Li, Hong-Ru Ma -
Gauss–Bonnet term on vacuum decay
Abstract We study the effect of the Gauss–Bonnet term on vacuum decay process in the Coleman–De Luccia formalism. The Gauss–Bonnet term has an exponential coupling with the real scalar field, which appears in the low energy effective action of...
2008 / Rong-Gen Cai, Bin Hu, Seoktae Koh -
Field theory at a Lifshitz point
Abstract We construct the general renormalizable actions for the scalar field and the gauge field at a Lifshitz point characterized by the dynamical critical exponent z. The Lorentz invariance is broken down in the UV region, but is recovered in the ...
2009 / Bin Chen, Qing-Guo Huang -
Dynamical symmetry breaking on a cylinder in magnetic field
Abstract We study dynamical symmetry breaking on a cylinder in external magnetic field parallel to the axis of cylinder when magnetic field affects the dynamics of fermions only through the Aharonov–Bohm phase. We find that unlike other previously...
2005 / O.V. Gamayun, E.V. Gorbar -
Excitation coefficients and cross-sections for electron swarms in methane2004 / O Sasic, G Malovic, A Strinic, Z Nikitovic, Z Lj Petrovic
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The Invariant Set Hypothesis: A New Geometric Framework for the Foundations of Quantum Theory and the Role Played by Gravity
Abstract A new hypothesis is proposed about the nature of physical reality at its most primitive level. The hypothesis is framed in terms of invariance, a concept that forms the very bedrock of physics. Specifically, the Invariant Set Hypothesis...
2011 / T.N. Palmer -
Accurate analytical approximation of asteroid deflection with constant tangential thrust2012 / Claudio Bombardelli, Giulio Baù
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Measurement of jet spectra in Pb–Pb collisions at with the ALICE detector at the LHC
Abstract We report a measurement of transverse momentum spectra of jets detected with the ALICE detector in Pb–Pb collisions at s ...
2013 / Marta Verweij