Physical sciences topic list of research papers
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The nuclear physics of hyperfine structure in hydrogenic atoms
Abstract The theory of QED corrections to hyperfine structure in light hydrogenic atoms and ions has recently advanced to the point that the uncertainty of these corrections is much smaller than 1 part per million (ppm), while the experiments are...
2005 / J.L. Friar, G.L. Payne -
A model study of quark-number susceptibility at finite chemical potential and temperature
Abstract In this Letter, we try to give a direct method for calculating the quark-number susceptibility (QNS) at finite chemical potential and temperature. In our approach the QNS is given by a formula which solely involves ...
2009 / Deng-ke He, Xiao-xia Ruan, Yu Jiang, Wei-min Sun, Hong-shi Zong -
Energy losses in the black disc regime and correlation effects in the STAR forward pion production in dAu collisions
Abstract We argue that in the small x processes, in the black disc QCD regime (BDR) a very forward parton propagating through the nuclear matter should loose a significant and increasing with energy and atomic number fraction of its initial energy...
2007 / Leonid Frankfurt, M. Strikman -
Soft photon problem in leptonic B-decays
Abstract We point out at the peculiarity of B → μ ν μ ...
2009 / Damir Bećirević, Benjamin Haas, Emi Kou -
PAMELA, FGST and sub-TeV dark matter
Abstract PAMELA's observation that the cosmic ray positron fraction increases rapidly with energy implies the presence of primary sources of energetic electron–positron pairs. Of particular interest is the possibility that dark matter annihilations...
2010 / Dan Hooper, Kathryn M. Zurek -
Gravitino dark matter from inflaton decay
Abstract We discuss a scenario that gravitinos produced non-thermally by an inflaton decay constitute dark matter in the present universe. We find that this scenario is realized for wide ranges of the inflaton mass and the vacuum expectation value....
2008 / Fuminobu Takahashi -
A note on particles and scalar fields in higher-dimensional nutty spacetimes
Abstract In this note, we study the integrability of geodesic flow in the background of a very general class of spacetimes with NUT-charge(s) in higher dimensions. This broad set encompasses multiply NUT-charged solutions, electrically and...
2005 / Muraari Vasudevan -
Implication of a quasi fixed point with a heavy fourth generation: The emergence of a TeV-scale physical cutoff
Abstract It has been shown in a recent Letter that the Higgs quartic and Yukawa sectors of the Standard Model (SM) with a heavy fourth generation exhibit at a two-loop level a quasi fixed point structure instead of the one-loop Landau singularity...
2010 / P.Q. Hung, Chi Xiong -
Superstring in a pp-wave background at finite temperature. TFD approach
Abstract A thermodynamical analysis for the type IIB superstring in a pp-wave background is considered. The thermal Fock space is built and the temperature SUSY breaking appears naturally by analyzing the thermal vacuum. All the thermodynamical...
2004 / Daniel L. Nedel, M.C.B. Abdalla, A.L. Gadelha -
Quantum criticality and Yang–Mills gauge theory
Abstract We present a family of nonrelativistic Yang–Mills gauge theories in D + 1 dimensions whose free-field limit exhibits quantum critical behavior...
2010 / Petr Hořava -
A proposal for covariant renormalizable field theory of gravity
Abstract The class of covariant gravity theories which have nice ultraviolet behavior and seem to be (super)-renormalizable is proposed. The apparent breaking of Lorentz invariance occurs due to the coupling with the effective fluid which is induced ...
2010 / Shin'ichi Nojiri, Sergei D. Odintsov -
Cosmological moduli problem from thermal effects
Abstract We estimate the cosmological abundance of a modulus field that has dilatonic couplings to gauge fields, paying particular attention to thermal corrections on the modulus potential. We find that a certain amount of the modulus coherent...
2008 / Kazunori Nakayama, Fuminobu Takahashi -
Anomaly poles as common signatures of chiral and conformal anomalies
Abstract One feature of the chiral anomaly, analyzed in a perturbative framework, is the appearance of massless poles which account for it. They are identified by a spectral analysis of the anomaly graph and are usually interpreted as being of an...
2009 / Roberta Armillis, Claudio Corianò, Luigi Delle Rose -
Inverse problem for the propagation equation of cosmic-ray electrons/positrons from dark matter
Abstract We discuss the possibility of solving the inverse problem for the propagation equation of the cosmic-ray electrons/positrons from decaying/annihilating dark matter, and show simple analytic formulae to reconstruct the source spectrum of the ...
2009 / Koichi Hamaguchi, Kouhei Nakaji, Eita Nakamura -
Cosmological Kaluza–Klein branes in black brane spacetimes
Abstract We discuss the cosmological evolution of a brane in the D ( > 6 ) -dimensional black brane...
2008 / Masato Minamitsuji -
Pion form factor at spacelike momentum transfers from local-duality QCD sum rule
Abstract We study the pion form factor in a broad range of spacelike momentum transfers within the local-duality version of QCD sum rules. We make use of the recently calculated two-loop double spectral density of the 〈 ...
2008 / Victor Braguta, Wolfgang Lucha, Dmitri Melikhov -
A stable proton without R-parity: Implications for the LSP
Abstract The proton decays too rapidly in supersymmetric theories if a dimension-4 operator 5 ¯ ⋅ ...
2007 / Radu Tatar, Taizan Watari -
Reconstructing a string-inspired quintom model of dark energy
Abstract In this Letter, we develop a simple method for the reconstruction of the string-inspired dark energy model with the Lagrangian L = − V ...
2008 / Shuai Zhang, Bin Chen -
Heavy ion collisions in the used nucleon model
Abstract It is shown that recently proposed by R.J. Glauber the used nucleon model combined with the assumption that the nucleon consists of two constituents (a quark and a diquark) describes well the PHOBOS data on particle production at...
2007 / Adam Bzdak -
Lorentz invariance violation and symmetry in Randers–Finsler spaces
Abstract Lorentz invariance violation is a common feature of new physics beyond the Standard Model. We show that the symmetry of Randers spaces deduces a modified dispersion relation with characteristics of Lorentz invariance violation. The...
2008 / Zhe Chang, Xin Li