A Short Guide to Flavour Physics and CP Violation

We present the invited lectures given at the second Asia-Europe-Pacific School of High-Energy Physics (AEPSHEP), which took place in Puri, India in November 2014. The series of lectures aimed at graduate students in particle experiment/theory, covering the very basics of flavor physics and CP violation, some useful theoretical methods such as OPE and effective field theories, and some selected topics of flavour physics in the era of LHC.Comment: 51 pages, 19 figures, paper submitted for publication in a CERN Yellow Report (YR

Anarchic Yukawas and top partial compositeness: the flavour of a successful marriage

The top quark can be naturally singled out from other fermions in the Standard Model due to its large mass, of the order of the electroweak scale. We follow this reasoning in models of pseudo Nambu Goldstone Boson composite Higgs, which may derive from an underlying confining dynamics. We consider a new class of flavour models, where the top quark obtains its mass via partial compositeness, while the lighter fermions acquire their masses by a deformation of the dynamics generated at a high flavour scale. One interesting feature of such scenario is that it can avoid all the flavour constraints without the need of flavour symmetries, since the flavour scale can be pushed high enough. We show that both flavour conserving and violating constraints can be satisfied with top partial compositeness without invoking any flavour symmetry for the up-type sector, in the case of the minimal SO(5)/SO(4) coset with top partners in the four-plet and singlet of SO(4). In the down-type sector, some degree of alignment is required if all down-type quarks are elementary. We show that taking the bottom quark partially composite provides a dynamical explanation for the hierarchy causing this alignment. We present explicit realisations of this mechanism which do not require to include additional bottom partner fields. Finally, these conclusions are generalised to scenarios with non-minimal cosets and top partners in larger representations.Comment: 37 pages, 1 figure, v2: typos fixed, Eq. (3.44) added, version corresponds to published article in JHE

English for the Purpose of Reducing the Poverty of Orphans with Disabilities in Thailand

This study examines the English teaching/learning practices of Christian missionaries who teach Thai orphans with disabilities with a view to developing skills that will enable them to overcome their impoverished condition.   The researcher found that older Thai orphans (>14 years) with disabilities evinced higher levels of awareness of their disabilities and are accordingly more engaged in learning English than the other orphans examined.  This is because they believe the acquisition of English skills will prove compensatory in view of the paucity of survival skills they now command, thereby enhancing employment opportunities in spite of their disabilities.  Conversely, the researcher found that younger Thai orphans (<14 years) with disabilities exhibited lower levels of awareness of the consequences of having disabilities and scarcely saw the need to learn English for the sake of becoming more employable.  As a result of demonstrating the role of awareness of disabilities as a major motivating factor for learning English, the researcher concludes that Thai orphans such as those studied can be encouraged to learn English by heightening their awareness that their job opportunities are limited by their disabilities and that becoming skilled in English can provide a feasible means whereby they can obtain suitable employment.  The results of this study should prove beneficial to those engaged in sustainable English education and practice in Thai orphanages. Keywords: Orphans with disabilities, English teaching/learning, poverty reductio

Rethinking globalization, English and multilingualism in Thailand: a report on a five-year ethnography

The starting point of this paper is to the development of a relatively panoramic account of English and multilingualism in Thailand, illuminating the relationships among powers (trends), individuals and groups and their multilingual practices. Most previous studies draw upon arguments from the traditional monocentric model of nation-state multilingualism. Surprisingly, little is known about the polycentric forces influencing multilingual distributions. Methodologically, large-scale data sets are gathered through literature, documents, questionnaires, interviews and observing actual language behaviors. The ethnographic data gathered are analyzed through content analysis conventions. Challenging Smalley’s nationalist model, the central thesis of this paper is to present an alternative path, a polycentric model, to better understand Thailand’s multilingualism. There is a lack of adequate evidence within and across Thailand to show the existence of a universal and coherent hierarchy connecting different layers of language users. As such, this paper argues that Smalley’s universal hierarchy/dominance model has to compete with alternative models termed a ‘multiarchy’ or ‘multiarchies’ (a portmanteau of “multiple hierarchies”) where parallel language hierarchies co-exist with the orthodox one

Nonlinear Matroid Optimization and Experimental Design

We study the problem of optimizing nonlinear objective functions over matroids presented by oracles or explicitly. Such functions can be interpreted as the balancing of multi-criteria optimization. We provide a combinatorial polynomial time algorithm for arbitrary oracle-presented matroids, that makes repeated use of matroid intersection, and an algebraic algorithm for vectorial matroids. Our work is partly motivated by applications to minimum-aberration model-fitting in experimental design in statistics, which we discuss and demonstrate in detail

Please Call Me John: Name Choice and the Assimilation of Immigrants in the United States, 1900-1930

The vast majority of immigrants to the United States at the beginning of the 20th century adopted first names that were common among natives. The rate of adoption of an American name increases with time in the US, although most immigrants adopt an American name within the first year of arrival. Choice of an American first name was associated with a more successful assimilation, as measured by job occupation scores, marriage to a US native and take-up of US citizenship. We examine economic determinants of name choice, by studying the relationship between changes in the proportion of immigrants with an American first name and changes in the concentration of immigrants as well as changes in local labor market conditions, across different census years. We find that high concentrations of immigrants of a given nationality in a particular location discouraged members of that nationality from taking American names. Poor local labor market conditions for immigrants (and good local labor market conditions for natives) led to more frequent name changes among immigrants

Please call me John: Name choice and the assimilation of immigrants in the United States, 1900 - 1930

The vast majority of immigrants to the United States at the beginning of the 20th century adopted first names that were common among natives. The rate of adoption of an American name increases with time in the US, although most immigrants adopt an American name within the first year of arrival. Choice of an American first name was associated with a more successful assimilation, as measured by job occupation scores, marriage to a US native and take-up of US citizenship. We examine economic determinants of name choice, by studying the relationship between changes in the proportion of immigrants with an American first name and changes in the concentration of immigrants as well as changes in local labor market conditions, across different census years. We find that high concentrations of immigrants of a given nationality in a particular location discouraged members of that nationality from taking American names. Poor local labor market conditions for immigrants (and good local labor market conditions for natives) led to more frequent name changes among immigrants

Please call me John: name choice and the assimilation of immigrants in the United States, 1900–1930

The majority of immigrants to the United States at the beginning of the 20th century adopted American first names. In this paper we study the economic determinants of name choice, by relating the propensity of immigrants to carry an American first name to the local concentration of their compatriots and local labor market conditions. We find that high concentrations of immigrants of a given nationality discouraged members of that nationality from taking American names, in particular for more recent arrivals. In contrast, labor market conditions for immigrants do not seem to be associated with more frequent name changes among immigrants.info:eu-repo/semantics/publishedVersio

Quantum mode filtering of non-Gaussian states for teleportation-based quantum information processing

We propose and demonstrate an effective mode-filtering technique of non-Gaussian states generated by photon-subtraction. More robust non-Gaussian states have been obtained by removing noisy low frequencies from the original mode spectrum. We show that non-Gaussian states preserve their non-classicality after quantum teleportation to a higher degree, when they have been mode-filtered. This is indicated by a stronger negativity $-0.033 \pm 0.005$ of the Wigner function at the origin, compared to $-0.018 \pm 0.007$ for states that have not been mode-filtered. This technique can be straightforwardly applied to various kinds of photon-subtraction protocols, and can be a key ingredient in a variety of applications of non-Gaussian states, especially teleportation-based protocols towards universal quantum information processing