Search results for "STANDARD"
showing 10 items of 3299 documents
Dark matter, dark photon and superfluid He-4 from effective field theory
2020
We consider a model of sub-GeV dark matter whose interaction with the Standard Model is mediated by a new vector boson (the dark photon) which couples kinetically to the photon. We describe the possibility of constraining such a model using a superfluid He-4 detector, by means of an effective theory for the description of the superfluid phonon. We find that such a detector could provide bounds that are competitive with other direct detection experiments only for ultralight vector mediator, in agreement with previous studies. As a byproduct we also present, for the first time, the low-energy effective field theory for the interaction between photons and phonons.
Integrating the Analysis of Mental Operations Into Multilevel Models to Validate an Assessment of Higher Education Students’ Competency in Business a…
2016
The Standards for Educational and Psychological Testing indicate that validation of assessments should include analyses of participants’ response processes. However, such analyses typically are conducted only to supplement quantitative field studies with qualitative data, and seldom are such data connected to quantitative data on student or item performance. This paper presents an example of how data from an analysis of mental operations collected using a sociocognitive approach can be quantitatively integrated with other data on student and item performance to validate in part an assessment of higher education students’ competency in business and economics. Evidence of forward reasoning an…
Contributions of Response Processes Analysis to the Validation of an Assessment of Higher Education Students’ Competence in Business and Economics
2017
Higher education domains such as Business and Economics (B&E) generally lack evidence that standardized tests of competency actually assess those aspects of knowledge and reasoning that constitute important targets for learning and instruction. The construction of such a validity argument benefits from a framework to guide the collection of relevant evidence regarding the interpretive meaning of tests results, especially with respect to instruction and learning in B&E. Response processes analysis provides much needed evidence within such a validity argument. The present paper illustrates application of such a framework and the use of response processes analysis for assessment in the B&E hig…
An ‘Authoritarian Nexus’? China’s Alleged Special Relationship with Autocratic States in Latin America
2015
China’s rise is often interpreted as a harbinger of a new era in world politics and raises the question if such a power transition may impact upon patterns of democratic rule across the globe. There is growing interest in whether China acts as an outside stabilizer for other authoritarian regimes. This paper contributes to the emerging literature on the international dimension of autocratic rule by focusing on Chinese Latin American policy. Using the method of structured focused comparisons, we want to assess whether China’s relations towards the Latin American autocracies Cuba and Venezuela differ from those with structurally similar, but democratic cooperation partners in the region, name…
Measuring lepton flavor violation at LHC with a long-lived slepton in the coannihilation region
2008
When the mass difference between the lightest slepton, the NLSP, and the lightest neutralino, the LSP, is smaller than the tau mass, the lifetime of the lightest slepton increases in many orders of magnitude with respect to typical lifetimes of other supersymmetric particles. These small mass differences are possible in the MSSM and, for instance, they correspond to the coannihilation region of the CMSSM for $M_{1/2} \gsim 700$ GeV. In a general gravity-mediated MSSM, where the lightest supersymmetric particle is the neutralino, the lifetime of the lightest slepton is inversely proportional to the square of the intergenerational mixing in the slepton mass matrices. Such a long-lived slepton…
Indirect dark matter search with the ANTARES neutrino telescope
2012
Using the data recorded by the ANTARES neutrino telescope during 2007 and 2008, a search for high energy neutrinos coming from the direction of the Sun has been performed. The neutrino selection criteria have been chosen so as to maximize the rejection of the atmospheric background with respect to possible signals produced by the self-annihilation of weakly interactive massive particles accumulated in the centre of the Sun. After data unblinding, the number of neutrinos observed was found to be compatible with background expectations. The results obtained were compared to the fluxes predicted by the Constrained Minimal Supersymmetric Standard Model, and 90% upper limits for this model were …
Discrete Symmetries CP, T, CPT
2016
The role of Symmetry Breaking mechanisms to search for New Physics is of highest importance. We discuss the status and prospects of the Discrete Symmetries CP, T, CPT looking for their separate Violation in LHC experiments and meson factories.
Decoherence in supernova neutrino transformations suppressed by deleptonization
2007
16 pages, 12 figures.-- PACS nrs.: 14.60.Pq; 97.60.Bw.-- ISI Article Identifier: 000251987300100.-- ArXiv pre-print available at: http://arxiv.org/abs/0706.2498
The Transformation of Private Space in the Later Middle Ages: Rooms and Living Standards in the Kingdom of Valencia (1280-1450)
2020
This article undertakes a quantitative and qualitative analysis of probate inventories from a selection of towns and highly urbanized areas from the kingdom of Valencia in the period 1280-1460, which are used to explore the inner distribution of more than 300 housings. Agreeing with the historiographical statement that this period was one of general improvement as to living standards and housing, this article reveals Valencian dwellings were provided with more specialized rooms since the late fourteenth century. This phenomenon was present particularly in the residences of townspeople living in large urban centers. Despite the predominant spatial simplicity of most late medieval housings, …
Integrating a Nexus: the history of political discourse and language policy research
2019
Historians of political discourse and language policy researchers should join forces to develop methods of textual analysis that help to integrate political and intellectual history. They could do so by focusing their analysis on interconnections between material realities, human physical action, practices and structures, as well as institutions and ideologies as discursive constructs. Such a version of soft constructivism underscoring the discursive nature of much of politics encourages historians to analyse past political discourses more systematically. Concepts such as nexus, historical body, mobility and discursive transfers borrowed from language research deepen our analytical understa…