Physical sciences topic list of research papers
-
Gauge coupling unification, the GUT scale, and magic fields
Abstract We consider field sets that do not form complete SU(5) multiplets, but exactly preserve the one-loop MSSM prediction for α 3 ...
2009 / L. Calibbi, L. Ferretti, A. Romanino, R. Ziegler -
Theoretical limits on the equation-of-state parameter of phantom cosmology
Abstract We investigate the restrictions on the equation-of-state parameter of phantom cosmology, due to the minimum quantum gravitational requirements. We find that for all the examined w ...
2009 / Emmanuel N. Saridakis -
Enhancement of “CP-odd” Higgs boson production in the minimal supersymmetric Standard Model with explicit CP-violation
Abstract We calculate the production cross section of the “CP-odd” Higgs boson via gluon fusion in the minimal supersymmetric Standard Model with explicit CP-violation in the stop sector. We show that there is a parameter region in which the cross...
2005 / Qing-Hong Cao, Daisuke Nomura, Kazuhiro Tobe, C.-P. Yuan -
Sum rules and spin-dependent polarizabilities of the deuteron in effective field theory
Abstract We construct sum rules for the forward vector and tensor polarizabilities for any spin-S target and apply them to the spin-1 deuteron. We calculate these polarizabilities of the deuteron to the next-to-leading order in the pionless...
2004 / Xiangdong Ji, Yingchuan Li -
Generalized uncertainty principle and black hole entropy
Abstract Recently, there has been much attention devoted to resolving the quantum corrections to the Bekenstein–Hawking black hole entropy. In particular, many researchers have expressed a vested interest in the coefficient of the logarithmic term...
2006 / Zhao Ren, Zhang Sheng-Li -
Lepton flavor violation in intersecting D-brane models
Abstract We investigate lepton flavor violation in the context of intersecting D-brane models. We point out that these models have a source to generate flavor violation in the trilinear scalar couplings while the geometry of the construction leads...
2006 / Bhaskar Dutta, Yukihiro Mimura -
Transverse invariant higher-spin fields
Abstract It is shown that a symmetric massless bosonic higher-spin field can be described by a traceless tensor field with reduced (transverse) gauge invariance. The Hamiltonian analysis of the transverse gauge invariant higher-spin models is used...
2008 / E.D. Skvortsov, M.A. Vasiliev -
Experimental search for neutron–mirror neutron oscillations using storage of ultracold neutrons
Abstract The idea of a hidden sector of mirror partners of elementary particles has attracted considerable interest as a possible candidate for dark matter. Recently it was pointed out by Berezhiani and Bento that the present experimental data...
2008 / A.P. Serebrov, E.B. Aleksandrov, N.A. Dovator, S.P. Dmitriev, A.K. Fomin, et al. -
Spontaneous Lorentz violation and nonpolynomial interactions
Abstract Gauge-noninvariant vector field theories with superficially nonrenormalizable nonpolynomial interactions are studied. We show that nontrivial relevant and stable theories have spontaneous Lorentz violation, and we present a large class of...
2005 / B. Altschul, V. Alan Kostelecký -
Quantizing the de Sitter space–times
Abstract In this Letter, the cosmological horizons are quantized by the reduced phase space approach [Phys. Lett. B 517 (2001) 415], in the cases of Schwarzschild–de Sitter and pure de Sitter space–times. The same discrete spectrum is obtained,...
2004 / Li Xiang, You-Gen Shen -
Neutrino bremsstrahlung in neutron matter from effective nuclear interactions
Abstract We revisit the emissivity from neutrino pair bremsstrahlung in neutron–neutron scattering, nn→nnν ν ̄ , which was calculated from the...
2004 / Achim Schwenk, Prashanth Jaikumar, Charles Gale -
Three loop QCD MOM β-functions
Abstract We present the full expressions for the QCD β-function in the MOMggg, MOMq and MOMh renormalization schemes at three loops for an arbitrary colour group in the Landau gauge. The results for all three schemes are in very good agreement with...
2011 / J.A. Gracey -
AdS/CFT boundary conditions and multi-trace perturbations for fermions
Abstract Extending the results of a previous paper [Phys. Lett. B 584 (2004) 192] we consider boundary conditions for spinor fields and other fields of non-zero spin in the AdS/CFT correspondence. We calculate the RG-flow induced by double trace...
2004 / David Nolland -
Exact solution in the Heisenberg picture and annihilation–creation operators
Abstract The annihilation–creation operators of the harmonic oscillator, the basic and most important tools in quantum physics, are generalised to most solvable quantum mechanical systems of single degree of freedom including the so-called...
2006 / Satoru Odake, Ryu Sasaki -
Collimation of average multiplicity in QCD jets
Abstract The collimation of average multiplicity inside quark and gluon jets is investigated in perturbative QCD in the modified leading logarithmic approximation (MLLA). The role of higher order corrections accounting for energy conservation and...
2009 / François Arleo, Redamy Pérez Ramos -
Magnetic properties of the Larkin–Ovchinnikov–Fulde–Ferrell superconducting phase
Abstract We compute, at the first order in the fine structure constant, the parameters of the electromagnetic Lagrangian for the inhomogeneous Larkin–Ovchinnikov–Fulde–Ferrell phase in quantum chromodynamics (QCD) and in condensed matter. In...
2004 / R. Casalbuoni, R. Gatto, M. Mannarelli, G. Nardulli, M. Ruggieri -
An improved estimate of black hole entropy in the quantum geometry approach
Abstract A proper counting of states for black holes in the quantum geometry approach shows that the dominant configuration for spins are distributions that include spins exceeding one-half at the punctures. This raises the value of the Immirzi...
2005 / A. Ghosh, P. Mitra -
Testing partonic charge symmetry at a high-energy electron collider
Abstract We examine the possibility that one could measure partonic charge symmetry violation (CSV) by comparing neutrino or antineutrino production through charged-current reactions induced by electrons or positrons at a possible electron collider...
2011 / T.J. Hobbs, J.T. Londergan, D.P. Murdock, A.W. Thomas -
Bose–Einstein condensation in helium white dwarf stars. I
Abstract The formation of a Bose–Einstein condensate in the interior of helium white dwarfs stars is discussed. Following the proposal made by Gabadadze and Rosen, we have explored the consequences of such a mechanism by calculating the cooling time ...
2009 / M.E. Mosquera, O. Civitarese, O.G. Benvenuto, M.A. De Vito -
Reanalysis of the Gallex solar neutrino flux and source experiments
Abstract After the completion of the gallium solar neutrino experiments at the Laboratori Nazionali del Gran Sasso (Gallex: 1991–1997; GNO: 1998–2003) we have retrospectively updated the Gallex results with the help of new technical data that were...
2010 / F. Kaether, W. Hampel, G. Heusser, J. Kiko, T. Kirsten