Physical sciences topic list of research papers
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Quark dipole operators in extended technicolor models
Abstract We study diagonal and transition quark dipole operators in a class of extended technicolor (ETC) models, taking account of the multiscale nature of the ETC gauge symmetry breaking and of the mixing among ETC interaction eigenstates. Because ...
2004 / Thomas Appelquist, Maurizio Piai, Robert Shrock -
Bound excited states in 27F
Abstract The 1H(27F, 25,26,27F) reactions have been studied at 40 MeV / nucleon average energy using a...
2004 / Z. Elekes, Zs. Dombrádi, A. Saito, N. Aoi, H. Baba, et al. -
Lorentz-violating massive gauge and gravitational fields
Abstract We study nonlinear dynamics in models of Lorentz-violating massive gravity. The Boulware–Deser instability restricts severely the class of acceptable theories. We identify a model that is stable. It exhibits the following bizarre but...
2005 / Gregory Gabadadze, Luca Grisa -
P-parity of charm and strange particles in electroproduction processes, in collinear regime
Abstract We show that definite polarization observables for the simplest electroproduction processes, ℓ + N → ℓ ...
2004 / Michail P. Rekalo, Egle Tomasi-Gustafsson -
Generating mass and topological terms to the antisymmetric tensor matter field by Higgs mechanism
Abstract The interaction between the complex antisymmetric tensor matter field and a scalar field is constructed. We analyze the Higgs mechanism and show the generation of mass and topological terms by spontaneous symmetry breaking. ...
2007 / L. Gonzaga Filho, M.S. Cunha, C.A.S. Almeida, R.R. Landim -
What is the fate of a black hole embedded in an expanding universe?
Abstract Within a large class of exact solutions of the Einstein equations describing a black hole embedded in a Friedmann universe it is shown that, under certain assumptions, only those with comoving Hawking–Hayward quasi-local mass are generic,...
2008 / Valerio Faraoni, Changjun Gao, Xuelei Chen, You-Gen Shen -
Small x resummation and the Odderon
Abstract We present a general argument which suggests that the Bartels–Lipatov–Vacca Odderon intercept should be equal to one to all orders in the perturbation theory. The argument is based on the validity of the so-called omega-expansion in the...
2009 / Anna M. Staśto -
Constraints on the phase plane of the dark energy equation of state
Abstract Classification of dark energy models in the plane of w and w ′ , where w is the dark energy equation of state and ...
2009 / Chien-Wen Chen, Pisin Chen, Je-An Gu -
Noncommutativity effects in FRW scalar field cosmology
Abstract We study effects of noncommutativity on the phase space generated by a non-minimal scalar field which is conformally coupled to the background curvature in an isotropic and homogeneous FRW cosmology. These effects are considered in two...
2009 / Behrooz Malekolkalami, Mehrdad Farhoudi -
High statistics study of the K−→π0μ−ν decay
Abstract The decay K −→π 0 μ − ν has been studied using in-flight decays detected with the “STRA+” spectrometer. About 540K events were...
2003 / O.P Yushchenko, S.A Akimenko, K.S Belous, G.I Britvich, I.G Britvich, et al. -
Evidence for particle–hole excitations in the triaxial strongly-deformed well of 163Tm
Abstract Two interacting, strongly-deformed triaxial (TSD) bands have been identified in the Z = 69 nucleus 163Tm. This is the first time that interacting ...
2007 / N.S. Pattabiraman, Y. Gu, S. Frauendorf, U. Garg, T. Li, et al. -
Chemical freeze-out and the QCD phase transition temperature
Abstract We argue that hadron multiplicities in central high energy nucleus–nucleus collisions are established very close to the phase boundary between hadronic and quark matter. In the hadronic picture this can be described by multi-particle...
2004 / P. Braun-Munzinger, J. Stachel, Christof Wetterich -
Numerical study of the enlarged O(5) symmetry of the 3D antiferromagnetic RP2 spin model
Abstract We investigate by means of Monte Carlo simulation and finite-size scaling analysis the critical properties of the three-dimensional O ( 5 ) ...
2005 / L.A. Fernández, V. Martín-Mayor, D. Sciretti, A. Tarancón, J.L. Velasco -
The virtual photon–gluon impact factor with massive quarks and exact gluon kinematics
Abstract We calculate the impact factor coupling a virtual photon to a gluon via a massive quark–antiquark pair at LL order, but with the imposition of the correct gluon kinematics. Exact analytical results are presented in triple Mellin space with...
2006 / C.D. White, R. Peschanski, R.S. Thorne -
Probing dark force at BES-III/BEPCII
Abstract We study an experimental search of a GeV scale vector boson at BES-III/BEPCII. It is responsible for mediating a new U ( ...
2010 / Hai-Bo Li, Tao Luo -
Two-loop light fermion contribution to Higgs production and decays
Abstract We compute the electroweak corrections due to the light fermions to the production cross section σ(gg→H) and to the partial decay widths Γ(H→γγ) and Γ(H→gg). We present analytic results for these corrections that are expressed in terms of...
2004 / U. Aglietti, R. Bonciani, G. Degrassi, A. Vicini -
Non-planar diagrams and non-commutative superspace in Dijkgraaf–Vafa theory
Abstract We consider the field theory on non-commutative superspace and non-commutative spacetime that arises on D-branes in Type II superstring theory with a constant self-dual graviphoton and NS–NS B field background. N ...
2005 / Takeshi Morita -
Transverse momentum distribution of the Z produced at the Large Hadron Collider and related phenomena
Abstract From the recent theoretical result on the production of the Higgs boson at the Large Hadron Collider, it follows that other particles will also be produced with small transverse momentum, of the order of 1 ...
2010 / R. Gastmans, Sau Lan Wu, Tai Tsun Wu -
Reconstructing WIMP properties with neutrino detectors
Abstract If the dark matter of the Universe is constituted by weakly interacting massive particles (WIMP), they would accumulate in the core of astrophysical objects as the Sun and annihilate into particles of the Standard Model. High-energy...
2008 / Olga Mena, Sergio Palomares-Ruiz, Silvia Pascoli -
Axion condensate as a model for dark matter halos
Abstract Localized solutions of an axion-like scalar model with a periodic self-interaction are analyzed as a model of dark matter halos. It is shown that such a cold Bose–Einstein type condensate can provide a substantial contribution to the...
2008 / Eckehard W. Mielke, José A. Vélez Pérez