Volume 3
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Letter
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)
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. -
Research
Quantum cosmology of a classically constrained nonsingular Universe
Abhik Sanyal PMC Physics A 2009, 3:5 (22 October 2009)
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. -
Mini-review
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)
This summary of the Workshop “Beyond the 3-generation SM in the LHC era” presents a brief discussion of the fourth generation. -
Review
Marina Artuso, Elisabetta Barberio, Sheldon Stone PMC Physics A 2009, 3:3 (20 February 2009)
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. -
Research
Bhashyam Balaji PMC Physics A 2009, 3:2 (10 February 2009)
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. -
Mini-review
Weinberg like sum rules revisited
Sergey S Afonin PMC Physics A 2009, 3:1 (8 January 2009)
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.
