R and D in R&D. Endogenous growth and welfare.

No abstract availableResearch, Industrial -- Mathematical models;

How to build a community : New Urbanism and its critics

The focus of the following article will be New Urbanism, an urbanistic movement which originated in the United States and advocated the establishment and reinforcing of communities through planning activities. Its proponents claim that the proper design of space leads to the development of a local community. The article will discuss the main principles of the New Urbanism approach, such as its social doctrine and the concept of neighbourhood. Possible benefits of New Urbanism and critical arguments regarding it will also be analysed

Measurement of the ratio of branching fractions BR(B0→K∗γ)BR(Bs0→ϕγ)\frac{\mathcal{BR}(B^0\to K^*\gamma)}{\mathcal{BR}(B_s^0\to\phi\gamma)}

The interest to the rare radiative decays of the B-mesons at LHCb is mostly aroused due to the measurement of the photon polarization in the $B_s^0\to\phi\gamma$ decay, which may provide a sensitive probe for the Standard Model. The LHCb experiment has started to take data at the energy of $\sqrt{s} = 7 TeV$ in 2010 and the current paper presents the result of the studies of the two rare radiative decays $B^0\to K^*\gamma$ and $B_s^0\to\phi\gamma$ with $340 pb^{-1}$ of data taken in the first half of 2011. With this data we have a preliminary measurement of $\frac{\mathcal{BR}(B^0\to K^*\gamma)}{\mathcal{BR}(B_s^0\to\phi\gamma)} = 1.52\pm0.14(stat.)\pm0.10(syst.)\pm0.12(f_s/f_d)$ and assuming the measured value of $\mathcal{B}(B^0\to K^*\gamma) = (4.33 \pm 0.15)\times10^{-5}$ we infer $\mathcal{B}(B_s^0\to \phi\gamma) = (2.8\pm0.5)\times10^{-5}$ \cite{bib:conf}.Comment: Presented at the 2011 Hadron Collider Physics symposium (HCP-2011), Paris, France, November 14-18 2011, 3 pages, 2 figure

Study of KS semileptonic decays and CPT test with the KLOE detector

Study of semileptonic decays of neutral kaons allows to perform a test of discrete symmetries, as well as basic principles of the Standard Model. In this paper a general review on dependency between charge asymmetry constructed for semileptonic decays of short- and long-lived kaons and CPT symmetry is given. The current status of determination of charge asymmetry for short-lived kaon, obtained by reconstruction of about 10^5 KS -> pen decays collected at DAFNE with the KLOE detector is also reviewed.Comment: 4th Symposium on Prospects in the Physics of Discrete Symmetries (DISCRETE2014

Distribution of eigenvalues of sample covariance matrices with tensor product samples

We consider $n^2\times n^2$ real symmetric and hermitian matrices $M_n$, which are equal to sum of $m_n$ tensor products of vectors $X^\mu=B(Y^\mu\otimes Y^\mu)$, $\mu=1,\dots,m_n$, where $Y^\mu$ are i.i.d. random vectors from $\mathbb R^n (\mathbb C^n)$ with zero mean and unit variance of components, and $B$ is an $n^2\times n^2$ positive definite non-random matrix. We prove that if $m_n/n^2\to c\in [0,+\infty)$ and the Normalized Counting Measure of eigenvalues of $BJB$, where $J$ is defined below, converges weakly, then the Normalized Counting Measure of eigenvalues of $M_n$ converges weakly in probability to a non-random limit and its Stieltjes transform can be found from a certain functional equation