Physical sciences topic list of research papers
-
Universally leptophilic dark matter from non-Abelian discrete symmetry
Abstract The positron anomaly recently reported by the cosmic-ray measurements can be explained by the decaying dark matter scenario, where it decays mainly into leptons with the lifetime of O ( ...
2010 / Naoyuki Haba, Yuji Kajiyama, Shigeki Matsumoto, Hiroshi Okada, Koichi Yoshioka -
Excited states in neutron rich boron isotopes
Abstract New experimental results on in-beam gamma spectroscopy of neutron rich boron isotopes are presented for 17B and its neutron removal fragments 14,15B, after scattering with a H2 target. A gamma transition for 17B is observed at ...
2005 / R. Kanungo, Z. Elekes, H. Baba, Zs. Dombrádi, Zs. Fülöp, et al. -
Gluon polarization in nucleon
Abstract In the context of the so-called valon model, we calculate δ g g ...
2010 / Abolfazl Shahveh, Fatemeh Taghavi-Shahri, Firooz Arash -
Exploring the potential of antihyperons in nuclei with antiprotons
Abstract A simple method to explore the interaction of antihyperons in nuclei by exclusive hyperon–antihyperon pair production close to threshold in antiproton nucleus interactions is proposed. Due to energy and momentum conservation event-by-event...
2008 / J. Pochodzalla -
Third-order non-Coulomb correction to the S-wave quarkonium wave functions at the origin
Abstract We compute the third-order correction to the S-wave quarkonium wave functions | ψ ...
2007 / M. Beneke, Y. Kiyo, K. Schuller -
Quintom cosmologies admitting either tracking or phantom attractors
Abstract In this Letter we investigate the evolution of a class of cosmologies fueled by quintom dark energy and dark matter. Quintom dark energy is a hybrid of quintessence and phantom which involves the participation of two real scalar fields...
2006 / Ruth Lazkoz, Genly León -
CPT groups for spinor field in de Sitter space
Abstract A group structure of the discrete transformations (parity, time reversal and charge conjugation) for spinor field in de Sitter space are studied in terms of extraspecial finite groups. Two CPT groups are introduced, the first group from an...
2005 / V.V. Varlamov -
Hidden symmetries in minimal five-dimensional supergravity
Abstract We study the hidden symmetries arising in the dimensional reduction of d=5, N=2 supergravity to three dimensions. Extending previous partial results for the bosonic part, we give a derivation that includes fermionic ...
2003 / Markus Pössel, Sebastian Silva -
Determining reaction cross sections via characteristic X-ray detection: α-induced reactions on 169Tm for the astrophysical γ-process
Abstract The cross sections of the Tm 169 ( ...
2010 / G.G. Kiss, T. Rauscher, T. Szücs, Zs. Kertész, Zs. Fülöp, et al. -
A phenomenological π−p scattering length from pionic hydrogen
Abstract We derive a closed, model independent, expression for the electromagnetic correction factor to a phenomenological hadronic scattering length a h extracted from a hydrogenic ...
2004 / T.E.O. Ericson, B. Loiseau, S. Wycech -
Do magnetic fields prevent mirror particles from entering the galactic disk?
Abstract Recently it has been suggested that magnetic fields prevent mirror particles from entering the galactic disk, thereby disfavouring the mirror dark matter explanation of the dark matter direct detection experiments. We show that mirror...
2011 / R. Foot -
Signature of QCD critical point: Anomalous transverse velocity dependence of antiproton–proton ratio
Abstract We formulate the QCD critical point focusing effect on transverse velocity ( β t ) dependence of antiproton to...
2009 / Xiao-Feng Luo, Ming Shao, Cheng Li, Hong-Fang Chen -
Relic gravitons on Kasner-like branes
Abstract We discuss the cosmological amplification of tensor perturbations in a simple example of brane-world scenario, in which massless gravitons are localized on a higher-dimensional Kasner-like brane embedded in a bulk AdS background. Particular ...
2005 / M. Cavaglià, G. De Risi, M. Gasperini -
Radiation equations for black holes
Abstract It has been shown in [G.A. Vilkovisky, hep-th/0511182] that the metric in the semiclassical region of the collapse spacetime is expressed purely kinematically through the Bondi charges. Here the Bondi charges are expressed through this...
2006 / G.A. Vilkovisky -
Renormalizable parameters of the sine-Gordon model
Abstract The well-known phase structure of the two-dimensional sine-Gordon model is reconstructed by means of its renormalization group flow, the study of the sensitivity of the dynamics on microscopic parameters. Such an analysis resolves the...
2007 / S. Nagy, I. Nándori, J. Polonyi, K. Sailer -
Testing string theory via Born–Infeld electrodynamics?
Abstract We consider the feasibility of an experiment to measure the string parameter α ′ . The proposal relies on the...
2009 / Gerardo Muñoz, Daniel Tennant -
General solutions for some classes of interacting two field kinks
Abstract In this work we present some classes of models whose the corresponding two coupled first-order nonlinear equations can be put into a linear form, and consequently be solved completely. In these cases the so-called trial orbit method is...
2005 / A. de Souza Dutra -
Noncommutativity in quantum cosmology and the hierarchy problem
Abstract We study the quantum cosmology of an empty ( 4 + 1 ) -dimensional Kaluza–Klein cosmology with a...
2005 / F. Darabi, A. Rezaei-Aghdam, A.R. Rastkar -
A shell model representation with antibound states
Abstract An unified shell model scheme is introduced that evaluates simultaneously the contributions of bound single-particle states, Gamow resonances and antibound states to processes occurring in the continuum part of nuclear spectra. This new...
2004 / R. Id Betan, R.J. Liotta, N. Sandulescu, T. Vertse -
Triquark correlations and pentaquarks in a QCD sum rule approach
Abstract The role of quark correlations in the description of hadron dynamics in many domains of physics, from low energy dynamics to very hot (dense) systems, is being appreciated. Strong correlations of two quarks (diquark) have been widely...
2005 / Hee-Jung Lee, N.I. Kochelev, V. Vento