CP Violation in the K-System

CP violation in the K system is pedagogically reviewed. We discuss its manifestations in the neutral K meson systems, in rare K meson decays and in decays of charged K mesons. Results from classical experiments, and perspectives for upcoming experiments are included. We also briefly discuss the possibility of CPT tests.Comment: 36 pages, 19 figure

The Physics of DAFNE and KLOE

DAFNE, the Frascati phi factory, has been in operation since 1999. At the center of the physics program is the KLOE experiment, a multipurpose detector with optimizations for tagged and interferometry-based measurements of the neutral kaon system. KLOE has been taking data since 2000 and has helped to explore a wide array of topics in kaon and hadronic physics, including a comprehensive set of measurements to determine the CKM matrix element |Vus|, and a measurement of the e+e- --> pi+pi- cross section for the determination of the hadronic contribution to the muon anomaly. In addition, the DEAR experiment has measured the X-ray spectrum of kaonic hydrogen, and the FINUDA experiment has conducted its first studies in hypernuclear spectroscopy and a search for \bar{K}-nuclear bound states. We review the design, construction, and operation of the DAFNE facility, with an emphasis on the physics program of the KLOE experiment.Comment: 39 pages, 18 figures. With permission from the Annual Review of Particle and Nuclear Science. Final version of this material is scheduled to appear in the Annual Review of Particle Nuclear and Science, vol. 56, to be published in November 2006 by Annual Reviews (http://www.annualreviews.org) v2: Corrected misprint in Eq.

Explaining inequality in today’s capitalism.

Inequality within advanced countries has returned to levels typical of a century ago. At the global level it remains extremely high despite the rapid growth of major developing countries such as China, India and Brazil. This makes inequality a major economic issue, social problem and political challenge in today’s capitalism. However, economic inequality is the object of limited research efforts and attracts modest attention in the political arena.This is the result of several factors. Mainstream approaches view inequality as a necessary condition – or, at best, an unfortunate side effect - for achieving the more general objectives of economic growth and market efficiency. Most studies emphasise that inequality is to a large extent the consequence of international forces laying beyond the reach of policies by nation-states. More importantly, today’s inequality is the result of a variety of processes that have seriously increased its complexity, with major changes in its nature and mechanisms, compared to past decades. To the fundamental divide between capital and labour in the distribution of income between social classes and groups, new mechanisms have been added, that have fuelled income inequalities among individuals, rooted in the rise of top incomes, technological change, international production, labour markets, influence of families of origin and lack of intergenerational mobility. In this paper we propose an overall interpretation of the trajectory of inequality. The functional income distribution that leads to inequalities in factor incomes, with an increasing divide between the growing share of profits and financial rents – free to move across national borders, escape taxation and search for speculative gains – and the dwindling share of wages, nation-bound and unable to escape taxes. The specificity of top incomes – that combine rents, profits and “superstar” labour compensation complicates this picture with the effects of pro-rich policy changes. Inequalities have also strongly increased within wages, resulting from several factors. Education has an obvious influence, but plays a much smaller role than mainstream views would expect. Skill differences are increasingly important, and need to be examined in the context of specific professional groups, rather than with wide generalisations. Industry specificities, technology and international production do play a role, but in complex ways, depending on the nature of innovative strategies, local competences, market power and demand dynamics. Labour market arrangements – unionisation, presence of minimum wages or national contracts, diffusion of temporary or part-time labour contracts, etc. – are increasingly important factors in explaining the low pay of many young and low-skilled workers. Outside labour markets and the opportunities for social mobility promised by education, the family of origin remains a major determinant of individuals’ education and incomes, with an increasingly strong persistence of inequality across generations. The interpretation we provide offers a new explanation of the nature of today’s economic inequalities, of its consequences, and possible remedies.Inequality, Distribution, Welfare.

Degree of non-K\"ahlerianity for 6-dimensional nilmanifolds

We use Bott-Chern cohomology to measure the non-K\"ahlerianity of 6-dimensional nilmanifolds endowed with the invariant complex structures in M. Ceballos, A. Otal, L. Ugarte, and R. Villacampa's classification, [Invariant Complex Structures on 6-Nilmanifolds: Classification, Fr\"olicher Spectral Sequence and Special Hermitian Metrics, J. Geom. Anal. (2014)]. We investigate the existence of pluriclosed metric in connection with such a classification