Physical sciences topic list of research papers
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A gauge-independent mechanism for confinement and mass gap: Part 1 — The general framework
Abstract We propose a gauge-independent mechanism for the area-law behavior of Wilson loop expectation values in terms of worldsheets spanning Wilson loops interacting with the spin foams that contribute to the vacuum partition function. The method...
2010 / J. Wade Cherrington -
Perturbative analysis of the Neuberger–Dirac operator in the Schrödinger functional
Abstract We investigate the spectrum of the free Neuberger–Dirac operator D N on the Schrödinger functional (SF). We check ...
2008 / Shinji Takeda -
The LHC string Hunter's companion
Abstract The mass scale of fundamental strings can be as low as few TeV / c 2 ...
2008 / Dieter Lüst, Stephan Stieberger, Tomasz R. Taylor -
A gauge-independent mechanism for confinement and mass gap: Part 2. and
Abstract We apply to the case of gauge group G = SU ( 2 ) in three dimensions a...
2010 / J. Wade Cherrington -
Experimental tests of asymptotic freedom
Abstract Quantum chromodynamics (QCD), the gauge field theory of strong interaction, has specific features, asymptotic freedom and confinement, which determine the behaviour of quarks and gluons in particle reactions at high and low energy scales....
2006 / S. Bethke -
A note on unparticle in lower dimensions
Abstract Using the gauge-invariant but path-dependent variables formalism, we examine the effect of the space–time dimensionality on a physical observable in the unparticle scenario. We explicitly show that long-range forces between particles...
2008 / Patricio Gaete, Euro Spallucci -
Instability of agegraphic dark energy models
Abstract We investigate the agegraphic dark energy models which were recently proposed to explain the dark energy-dominated universe. For this purpose, we calculate their equation of states and squared speeds of sound. We find that the squared speed ...
2008 / Kyoung Yee Kim, Hyung Won Lee, Yun Soo Myung -
Observation of channeling and volume reflection in bent crystals for high-energy negative particles
Abstract Deflection due to planar channeling and volume reflection in short bent silicon crystals was observed for the first time for 150 GeV / c ...
2009 / W. Scandale, A. Vomiero, E. Bagli, S. Baricordi, P. Dalpiaz, et al. -
Superluminal warp drive and dark energy
Abstract In this Letter we consider a warp drive spacetime where the spaceship can only travel faster than light. Restricting to the two-dimensional case, we find that if the warp drive is placed in an accelerating universe the warp bubble size...
2007 / Pedro F. González-Díaz -
Lorentz violation and the proper-time method
Abstract In this Letter, we apply the proper-time method to generate the Lorentz-violating Chern–Simons terms in the four-dimensional Yang–Mills and non-linearized gravity theories. It is shown that the coefficient of the induced Chern–Simons term...
2008 / T. Mariz, J.R. Nascimento, A.Yu. Petrov, L.Y. Santos, A.J. da Silva -
Coincidence probability as a measure of the average phase-space density at freeze-out
Abstract It is pointed out that the average semi-inclusive particle phase-space density at freeze-out can be determined from the coincidence probability of the events observed in multiparticle production. The method of measurement is described and...
2005 / A. Bialas, W. Czyz, K. Zalewski -
Advantages and distinguishing features of focus point supersymmetry
Abstract Diverse experimental constraints now motivate models of supersymmetry breaking in which some superpartners have masses well above the weak scale. Three alternatives are focus point supersymmetry and inverted hierarchy models, which embody a ...
2005 / Jonathan L. Feng, Frank Wilczek -
Long range forces and limits on unparticle interactions
Abstract Couplings between standard model particles and unparticles from a nontrivial scale invariant sector can lead to long range forces. If the forces couple to quantities such as baryon or lepton (electron) number, stringent limits result from...
2008 / N.G. Deshpande, Stephen D.H. Hsu, Jing Jiang -
Heavy quark symmetry in isosinglet non-leptonic B-decays
Abstract We use a factorization theorem from the soft-collinear effective theory along with heavy quark symmetry to make model independent predictions for B ...
2005 / Andrew E. Blechman, Sonny Mantry, Iain W. Stewart -
Numerical evidence of regularized correlations in spin foam gravity
Abstract We report on the numerical analysis of the area correlations in spin foam gravity on a single 4-simplex considered by Rovelli [C. Rovelli, Phys. Rev. Lett. 97 (2006) 151301]. We compare the asymptotics and confirm the inverse squared...
2008 / J. Daniel Christensen, Etera R. Livine, Simone Speziale -
Matching NLLA+NNLO for event shape distributions
Abstract We study the matching of the next-to-leading logarithmic approximation (NLLA) onto the fixed next-to-next-to-leading order (NNLO) calculation for event shape distributions in electron–positron annihilation. The resulting theoretical...
2008 / T. Gehrmann, G. Luisoni, H. Stenzel -
Unparticle physics with broken scale invariance
Abstract If scale invariance is exact, unparticles are unlikely to be probed in colliders since there are stringent constraints from astrophysics and cosmology. However these constraints are inapplicable if scale invariance is broken at a scale ...
2008 / Vernon Barger, Yu Gao, Wai-Yee Keung, Danny Marfatia, V. Nefer Şenoğuz -
Currents on superconducting strings at finite chemical potential and temperature
Abstract We consider the model giving rise to Witten's superconducting cosmic strings at finite fermion chemical potential and temperature. We demonstrate how various symmetries of the Hamiltonian can be used to exactly compute the fermion electric...
2005 / Max A. Metlitski -
Heavy Higgs resonances for the neutralino relic density in the Higgs decoupling limit of the CP-noninvariant minimal supersymmetric standard model
Abstract The lightest neutralino is a compelling candidate to account for cold dark matter in the universe in supersymmetric theories with R-parity. In the CP-invariant theory, the neutralino relic density can be found in accord with recent WMAP...
2006 / S.Y. Choi, Y.G. Kim -
Inflationary predictions at small γ
Abstract This Letter explores single field inflation models with a constant, but arbitrary speed of sound c s , obtained by ...
2009 / Ewa Czuchry