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Stochastic backgrounds of relic gravitons: a theoretical appraisal
Massimo
Giovannini
PMC Physics A 2010, 4:1 (19 February 2010)
Abstract
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Editor’s summary
Stochastic backgrounds or relic gravitons, if ever detected, will constitute a prima facie evidence of physical processes taking place during the earliest stages of the evolution of the plasma. The essentials of the stochastic backgrounds of relic gravitons are hereby introduced and reviewed.
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First evidence of new physics in b ↔ s transitions
Marcella
Bona,
Marco
Ciuchini,
Enrico
Franco,
Vittorio
Lubicz,
Guido
Martinelli,
Fabrizio
Parodi,
Maurizio
Pierini,
Carlo
Schiavi,
Luca
Silvestrini,
Viola
Sordini,
Achille
Stocchi,
Vincenzo
Vagnoni
PMC Physics A 2009, 3:6 (18 December 2009)
Abstract
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Editor’s summary
We combine all the available experimental information on Bs mixing, including the very recent tagged analyses of Bs to J/Psi phi by the CDF and D0 collaborations. We find that the phase of the Bs mixing amplitude deviates more than 3 sigma from the Standard Model prediction. This result disfavours New Physics models with Minimal Flavour Violation with the same significance.
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Quantum cosmology of a classically constrained nonsingular Universe
Abhik
Sanyal
PMC Physics A 2009, 3:5 (22 October 2009)
Abstract
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Editor’s summary
The quantum cosmological version of a nonsingular Universe has been developed and the Hamilton Jacobi equation found under semiclassical (WKB) approximation. It has been pointed out that parameterization of classical trajectories with semiclassicaltime parameter for such a classically constrained system is a nontrivial task and requires Lagrangian formulation rather than the Hamiltonian formalism.
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Four statements about the fourth generation
Bob
Holdom,
WS
Hou,
Tobias
Hurth,
Michelangelo
L
Mangano,
Saleh
Sultansoy,
Gokhan
Ünel
PMC Physics A 2009, 3:4 (28 September 2009)
Abstract
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Editor’s summary
This summary of the Workshop “Beyond the 3-generation SM in the LHC era” presents a brief discussion of the fourth generation.
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B meson decays
Marina
Artuso,
Elisabetta
Barberio,
Sheldon
Stone
PMC Physics A 2009, 3:3 (20 February 2009)
Abstract
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Editor’s summary
This review article discusses the most important Physics thus far extracted from studies of B meson decays. We also point out where CP-violating and rare decays could lead to observations of physics beyond that of the Standard Model. If such physics is found by directly observation of new particles, e.g. in LHC experiments, B decays can play a decisive role in interpreting the nature of these particles.
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Universal nonlinear filtering using Feynman path integrals II: the continuous-continuous model with additive noise
Bhashyam
Balaji
PMC Physics A 2009, 3:2 (10 February 2009)
Abstract
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Editor’s summary
In this paper, the Feynman path integral formulation of the continuous-continuous filtering problem, a fundamental problem of applied science, is investigated for the case when the noise in the signal and measurement model is Gaussian and additive. It is shown that it leads to an independent and self-contained analysis and solution of the problem.
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Weinberg like sum rules revisited
Sergey
S
Afonin
PMC Physics A 2009, 3:1 (8 January 2009)
Abstract
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Editor’s summary
The generalized Weinberg sum rules containing the difference of isovector vector and axial-vector spectral functions saturated by both finite and infinite number of narrow resonances are considered. We give a historical survey and summarize the status of these sum rules analyzing their overall agreement with phenomenological
Lagrangians, low-energy relations, parity doubling, hadron string models, and experimental data.
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Study of hadronic event shape in flavour tagged events in e+e- annihilation at 〈s〉 = 197 GeV
Salvatore
Mele,
PMC Physics A 2008, 2:6 (8 December 2008)
Abstract
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Editor’s summary
Results are presented from a study of the structure of hadronic events in high-energy e+e- interactions detected by the L3 detector at LEP. Various event shape distributions and their moments are measured at several energy points at and above the Z-boson mass. A good description of the data is provided by the models.
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Plasma focus based repetitive source of fusion neutrons and hard x-rays
V
Raspa,
F
Di Lorenzo,
P
Knoblauch,
A
Lazarte,
A
Tartaglione,
A
Clausse,
C
Moreno
PMC Physics A 2008, 2:5 (29 October 2008)
Abstract
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Editor’s summary
A plasma focus device that operates up to 0.2 Hz for several minutes is used as a source of hard x-rays and fast neutrons, for the detection of hydrogenated substances, different concentrations of water, submillimetric defects in metal, and producing clear images of metallic objects through thick iron walls.
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The dawn of a new era of discovery?
Ken
Peach
PMC Physics A 2008, 2:4 (10 September 2008)
Abstract
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Editor’s summary
Editor in Chief Ken Peach reflects upon the LHC and the questions it seeks to answer.
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Hadron multiplicity in e+e- events induced by top quark pairs at the ILC energy
Alexandre
V
Kisselev,
Vladimir
A
Petrov
PMC Physics A 2008, 2:3 (4 April 2008)
Abstract
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Editor’s summary
The average charged hadron multiplicity in the e+eâ events with the primary tït-pair at the collision energy 500 GeV, as well as the average multiplicity of charged hadrons from the top quark are calculated in QCD to be 86.7 ñ 1.11 and 41.0 ñ 0.54, respectively.
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Effects of supersymmetric threshold corrections on high-scale flavour textures
Altan
Çakir,
Levent
Solmaz
PMC Physics A 2008, 2:2 (7 March 2008)
Abstract
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Editor’s summary
Integration of superpartners out of the spectrum induces potentially large contributions to Yukawa couplings. Supersymmetric threshold corrections therefore influence the CKM matrix prediction in a non-trivial way. We study the effects of threshold corrections on high-scale flavor structures specified at the gauge coupling unification scale in supersymmetry.
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Supernova Ia observations in the Lemaître-Tolman model
Krzysztof
Bolejko
PMC Physics A 2008, 2:1 (12 February 2008)
Abstract
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Editor’s summary
This paper investigates whether models including realistic inhomogeneous matter distribution but without the cosmological constant can produce dimming of high-redshift supernovae consistent with acceleration of the Universe. It is found that, although the model mimics observations at small scales, the cosmological constant must be invoked to account for dimming over larger scales.
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The luminosity-redshift relation in brane-worlds: II. Confrontation with experimental data
Gyula
M
Szabó,
László
Á
Gergely,
Zoltán
Keresztes
PMC Physics A 2007, 1:8 (12 December 2007)
Abstract
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Editor’s summary
The luminosity distance-redshift relation for a wide class of generalized Randall-Sundrum type II brane-world models with Weyl fluid is compared to the presently available supernova data. We find that there is a class of spacially flat models with different amounts of matter and Weyl fluid, which have a very similar fitting quality.
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Interactive visualization of multidimensional coincidence spectra
Miroslav
Morhá?,
Vladislav
Matou?ek
PMC Physics A 2007, 1:7 (23 November 2007)
Abstract
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Editor’s summary
Direct visualization techniques of multidimensional nuclear spectra are presented, as well as visualization techniques based on projections of embedded subspaces. While the first group of graphical models is limited to four dimensions, the second one can be theoretically extended to any dimension.
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Exclusive ρ0 production in deep inelastic scattering at HERA
PMC Physics A 2007, 1:6 (12 November 2007)
Abstract
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Editor’s summary
Exclusive rho^0 electroproduction at HERA has been studied with the ZEUS detector using 120 pb^{-1} of integrated luminosity collected during 1996-2000. The results include the Q^2 and W dependence of the gamma^* p --> rho^0 p cross section and the distribution of the squared-four-momentum transfer to the proton.
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Semi-analytical approach to magnetized temperature autocorrelations
Massimo
Giovannini
PMC Physics A 2007, 1:5 (18 October 2007)
Abstract
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Editor’s summary
Cosmic microwave background temperature autocorrelations, induced by a magnetized adiabatic mode of curvature inhomogeneities, are computed with semi-analytical methods. The implications of this investigation for the origin of large-scale magnetic fields in the Universe are discussed, as are connections with forthcoming experimental observations.
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The luminosity-redshift relation in brane-worlds: I. Analytical results
Zoltán
Keresztes,
László
Á
Gergely,
Botond
Nagy,
Gyula
M
Szabó
PMC Physics A 2007, 1:4 (2 October 2007)
Abstract
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Editor’s summary
The luminosity distance-redshift relation is analytically given for generalized Randall-Sundrum type II brane-world models containing Weyl fluid either as dark radiation or as a radiation field from the brane. The derived analytical results are suitable for future testing of the models.
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Ricci Flow Gravity
Wolfgang
Graf
PMC Physics A 2007, 1:3 (2 October 2007)
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Dilaton and off-shell (non-critical string) effects in Boltzmann equation for species abundances
AB
Lahanas,
NE
Mavromatos,
DV
Nanopoulos
PMC Physics A 2007, 1:2 (2 October 2007)
Abstract
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Editor’s summary
The amount of dark matter left over from the early universe may be less than previously believed. This paper shows that the "relic abundance" of stable dark matter particles such as the neutralino may be reduced as compared to standard cosmology theories due to the effects of the dilaton.
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Welcome to PMC Physics A
Ken
Peach
PMC Physics A 2007, 1:1 (2 October 2007)
Abstract
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