Physical sciences topic list of research papers
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Conversion of second class constraints by deformation of Lagrangian local symmetries
Abstract For a theory with first and second class constraints, we propose a procedure for conversion of second class constraints based on deformation the structure of local symmetries of the Lagrangian formulation. It does not require extension or...
2007 / A.A. Deriglazov, Z. Kuznetsova -
Impact of squark generation mixing on the search for squarks decaying into fermions at LHC
Abstract We study the effect of squark generation mixing on squark production and decays at LHC in the Minimal Supersymmetric Standard Model (MSSM). We show that the effect can be very large despite the very strong constraints on quark-flavour...
2011 / A. Bartl, H. Eberl, B. Herrmann, K. Hidaka, W. Majerotto, et al. -
Renormalization-group running cosmologies and the generalized second law
Abstract We explore some thermodynamical consequences of accelerated universes driven by a running cosmological constant (CC) from the renormalization group (RG). Application of the generalized second law (GSL) of gravitational thermodynamics to a...
2007 / R. Horvat -
Acoustic black holes from Abelian Higgs model with Lorentz symmetry breaking
Abstract In this Letter we derive acoustic black hole metrics in the ( 3 + 1 ) and ( 2 + ...
2010 / M.A. Anacleto, F.A. Brito, E. Passos -
Low-energy ππ photoproduction off nuclei
Abstract In the present Letter we investigate π 0 π 0 and π ± π 0 photoproduction off complex nuclei at incident beam...
2004 / P. Mühlich, L. Alvarez-Ruso, O. Buss, U. Mosel -
Standard-model-like Higgs-pair production and decay in left–right twin Higgs model
Abstract In the framework of the left–right twin Higgs (LRTH) model, we study the production of a pair of SM-like Higgs bosons at the LHC (Higgs mass is typical in the range of 160–180 GeV). First, we examine the production rate and find that it can ...
2010 / Lei Wang, Xiao-Fang Han -
An unquenched lattice QCD calculation of the mass of the bottom quark
Abstract We compute the b quark mass from dynamical lattice QCD with clover quarks. The calculation is done at a fixed lattice spacing with sea quark masses as low as half the strange quark mass. Our final result is ...
2004 / C. McNeile, C. Michael, Gavin Thompson -
Scalar emission in the bulk in a rotating black hole background
Abstract We study the emission of scalars into the bulk from a higher-dimensional rotating black hole. We obtain an analytic solution to the field equation by employing matching techniques on expressions valid in the near-horizon and far-field...
2007 / S. Creek, O. Efthimiou, P. Kanti, K. Tamvakis -
CP violation in chargino production and decay into sneutrino
Abstract We study CP odd asymmetries in chargino production e + e ...
2004 / A. Bartl, H. Fraas, O. Kittel, W. Majerotto -
On noncommutative minisuperspace and the Friedmann equations
Abstract In this Letter we present a noncommutative version of scalar field cosmology. We find the noncommutative Friedmann equations as well as the noncommutative Klein–Gordon equation, interestingly the noncommutative contributions are only...
2011 / W. Guzmán, M. Sabido, J. Socorro -
Diffeomorphisms from finite triangulations and absence of ‘local’ degrees of freedom
Abstract If the diffeomorphism symmetry of general relativity is fully implemented into a path integral quantum theory, the path integral leads to a partition function which is an invariant of smooth manifolds. We comment on the physical...
2004 / Hendryk Pfeiffer -
Exact scaling solutions and fixed points for general scalar field
Abstract We show that the most general dark energy model that possesses a scaling solution ρ ϕ ∝ ...
2006 / Yungui Gong, Anzhong Wang, Yuan-Zhong Zhang -
Eikonal but not: A complementary view of high energy evolution
Abstract The high energy evolution equations that describe the evolution of hadronic amplitudes with energy are derived assuming eikonal interaction of the evolved hadronic wave function with the target. In this Letter we remark that this derivation ...
2007 / Tolga Altinoluk, Alex Kovner, Javier Peressutti -
Nuclear ground-state spin and magnetic moment of 21Mg
Abstract We present the results of combined laser spectroscopy and nuclear magnetic resonance studies of 21Mg. The nuclear ground-state spin was measured to be I = 5 ...
2009 / J. Krämer, K. Blaum, M. De Rydt, K.T. Flanagan, Ch. Geppert, et al. -
Understanding nuclear shape phase transitions at the nucleon level with a boson mapping approach
Abstract Implementing a shell model Hamiltonian with monopole-pair, quadrupole-pair and quadrupole–quadrupole interactions between nucleons, we study the shape phases of nuclei and their transitions, with the Dyson boson mapping approach. The...
2010 / Zhan-feng Hou, Yu Zhang, Yu-xin Liu -
Model-independent bound on the dark matter lifetime
Abstract If dark matter (DM) is unstable, in order to be present today, its lifetime needs to be longer than the age of the Universe, t U ...
2008 / Sergio Palomares-Ruiz -
Heavy-quark production in massless quark scattering at two loops in QCD
Abstract We present the two-loop virtual QCD corrections to the production of heavy quarks in the quark–anti-quark annihilation channel in the limit when all kinematical invariants are large compared to the mass of the heavy quark. Our result is...
2007 / M. Czakon, A. Mitov, S. Moch -
Non-Fermi-liquid effect in magnetic susceptibility
Abstract Taking into account the anomalous self-energy for quarks due to the dynamic screening effect for the transverse gluon propagator, we study the temperature dependence of the magnetic susceptibility in detail. It is shown that there does not...
2009 / T. Tatsumi, K. Sato -
Remnant index theorem and low-lying eigenmodes for twisted mass fermions
Abstract We analyze the low-lying spectrum and eigenmodes of lattice Dirac operators with a twisted mass term. The twist term expels the eigenvalues from a strip in the complex plane and all eigenmodes obtain a non-vanishing matrix element with ...
2005 / Christof Gattringer, Stefan Solbrig -
An attempt to solve the hierarchy problem based on gravity-gauge-Higgs unification scenario
Abstract We discuss a possible scenario to solve the hierarchy problem, in which 4-dimensional bosonic fields with all possible integer spins, graviton, gauge boson and Higgs are unified in a framework of a gravity theory with extra dimensions. The...
2004 / K. Hasegawa, C.S. Lim, Nobuhito Maru