Physical sciences topic list of research papers
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Constructing networks of defects with scalar fields
Abstract We propose a new way to build networks of defects. The idea takes advantage of the deformation procedure recently employed to describe defect structures, which we use to construct networks, spread from small rudimentary networks that appear ...
2008 / V.I. Afonso, D. Bazeia, M.A. Gonzalez León, L. Losano, J. Mateos Guilarte -
Systematization of basic divergent integrals in perturbation theory and renormalization group functions
Abstract We show that to n loop order the divergent content of a Feynman amplitude is spanned by a set of basic (logarithmically divergent) integrals I log ...
2009 / L.C.T. Brito, H.G. Fargnoli, A.P. Baêta Scarpelli, Marcos Sampaio, M.C. Nemes -
Electroweak chiral Lagrangian for a hypercharge-universal topcolor model
Abstract Electroweak chiral Lagrangian for a hypercharge-universal topcolor model is investigated. We find that the assignments of universal hypercharge improve the results obtained previously from K. Lane's prototype natural TC2 model by allowing a ...
2009 / Jun-Yi Lang, Shao-Zhou Jiang, Qing Wang -
Fulling–Davies–Unruh effect and spontaneous excitation of an accelerated atom interacting with a quantum scalar field
Abstract We investigate, from the point of view of a coaccelerated frame, the spontaneous excitation of a uniformly accelerated two-level atom interacting with a scalar field in a thermal state at a finite temperature T and show that the same...
2007 / Zhiying Zhu, Hongwei Yu -
Second-order corrections to the power spectrum in the slow-roll expansion with a time-dependent sound speed
Abstract We extend Green's function method developed by Stewart and Gong to calculate the power spectrum of density perturbation in the case with a time-dependent sound speed, and explicitly give the power spectrum and spectral index up to...
2004 / Hao Wei, Rong-Gen Cai, Anzhong Wang -
Searching for onset of deconfinement via hypernuclei and baryon-strangeness correlations
Abstract We argue that the ratio S 3 = H ...
2010 / S. Zhang, J.H. Chen, H. Crawford, D. Keane, Y.G. Ma, et al. -
A first integration of some knot soliton models
Abstract Recently it has been shown that there exists a sector within the Faddeev–Niemi model for which the equations of motion may be reduced to first order equations. However, no solutions to that sector have been given. It is not even known...
2007 / C. Adam, J. Sánchez-Guillén, A. Wereszczyński -
Perturbative vacua from IIB matrix model
Abstract It has not been clarified whether a matrix model can describe various vacua of string theory. In this Letter, we show that the IIB matrix model includes type IIA string theory. In the naive large N limit of the IIB matrix model,...
2007 / Hikaru Kawai, Matsuo Sato -
LCSR analysis of exclusive two-body B decay into charmonium
Abstract We analyze B→KH c (where H c =η c ...
2004 / Blaženka Melić -
Renormalisation of one-link quark operators for overlap fermions with Lüscher–Weisz gauge action
Abstract We compute lattice renormalisation constants of one-link quark operators (i.e., operators with one covariant derivative) for overlap fermions and Lüscher–Weisz gauge action in one-loop perturbation theory. Among others, such operators enter ...
2005 / R. Horsley, H. Perlt, P.E.L. Rakow, G. Schierholz, A. Schiller -
Low-energy limits on heavy Majorana neutrino masses from the neutrinoless double-beta decay and non-unitary neutrino mixing
Abstract In the type-I seesaw mechanism, both the light Majorana neutrinos ( ν 1 , ...
2009 / Zhi-zhong Xing -
Effective equation of state for dark energy: Mimicking quintessence and phantom energy through a variable Λ
Abstract While there is mounting evidence in all fronts of experimental cosmology for a non-vanishing dark energy component in the Universe, we are still far away from understanding its ultimate nature. A fundamental cosmological constant, Λ, is the ...
2005 / Joan Solà, Hrvoje Štefančić -
Analyticity and the phase diagram of QCD
Abstract Some consequences of the analyticity of the free energy (pressure) of QCD at finite chemical potential are deduced. Lattice simulations at imaginary chemical potential are possible due to the positivity of the measure. We show that such a...
2004 / Sourendu Gupta -
Massive gravitons trapped inside a hypermonopole
Abstract We propose a regular classical field theory realisation of the Dvali–Gabadadze–Porrati mechanism by considering our universe to be the four-dimensional core of a seven-dimensional 't Hooft–Polyakov hypermonopole. We show the existence of...
2008 / Antonio De Felice, Christophe Ringeval -
Astrophysical signatures of secluded dark matter
Abstract We analyze the indirect astrophysical signatures of secluded models of WIMP dark matter, characterized by a weak-scale rate for annihilation into light MeV-scale mediators which are metastable to decay into Standard Model states. Such...
2008 / Maxim Pospelov, Adam Ritz -
In-beam γ-ray spectroscopy at the proton dripline: 23Al
Abstract We report on the first in-beam γ-ray spectroscopy of 23Al using two different reactions at intermediate beam energies: inelastic scattering off 9Be and heavy-ion induced one-proton pickup, 9Be(22Mg,23Al+γ)X, at 75.1 MeV/nucleon. A γ-ray...
2008 / A. Gade, P. Adrich, D. Bazin, M.D. Bowen, B.A. Brown, et al. -
Hawking temperature of Kerr–Newman–AdS black hole from tunneling
Abstract Using the null-geodesic tunneling method of Parikh and Wilczek, we derive the Hawking temperature of a general four-dimensional rotating black hole. In order to eliminate the motion of ϕ degree of freedom of a tunneling particle, we have...
2008 / Zheng Ze Ma -
A method of experimentally probing transverse momentum dependent distributions
Abstract We calculate the double spin asymmetry A L L ...
2008 / Dae Sung Hwang, Dong Soo Kim -
Dynamic polarization in the Coulomb breakup of loosely bound 17F
Abstract Angular distributions of the Coulomb breakup of radioactive 17F were measured by impinging a 10 MeV/nucleon beam on 208Pb and on 58Ni to study the dynamic polarization effects. The breakup products, oxygen and a proton, were detected in...
2009 / J.F. Liang, J.R. Beene, A.L. Caraley, H. Esbensen, A. Galindo-Uribarri, et al. -
Lepton flavor violating muon decays in a model of electroweak-scale right-handed neutrinos
Abstract The small neutrino mass observed in neutrino oscillations is nicely explained by the seesaw mechanism. Rich phenomenology is generally expected if the heavy neutrinos are not much heavier than the electroweak scale. A model with this...
2008 / Jian-Ping Bu, Yi Liao, Ji-Yuan Liu