Measurements of CPT Violation at LHCb

Recent measurements of CPT violation and Lorentz symmetry breaking in $B^0-\bar{B}^0$ mixing and $B^0_s-\bar{B}^0_s$ mixing, obtained from data taken by the LHCb experiment, are highlighted. The results are expressed in terms of the Standard-Model Extension (SME) coefficients, which incorporate both CPT and Lorentz violation. Due to the large boost of the $B$ mesons at LHCb, the SME coefficients can be determined with high precision. The bounds on these coefficients are improved significantly compared to previous measurements.Comment: Presented at the Seventh Meeting on CPT and Lorentz Symmetry, Bloomington, Indiana, June 20-24, 201

The road to Maastricht research-based learning

The dutch ministry of education, culture, and science established the sirius programme in 2008 as an official initiative designed to strengthen the innovative capacity of the netherlands by enhancing the public knowledge infrastructure. The ministry invited all higher education institutions (research universities as well as universities of applied sciences) to submit a plan for the promotion of excellence, either independently or in collaboration with other institutions. The largest portion of the sirius budget, €48.8 million, was allocated to bachelor’s programmes and was launched in 2008. Maastricht university applied for funding from the sirius programme to develop bachelor’s research opportunities as a new form of problem-based learning, which is the characteristic educational format of the university. Maastricht university named this bachelor’s excellence programme maastricht research-based learning for excellence or marble. With the introduction of marble, maastricht university was given the opportunity to introduce new forms of problem-based learning to extend the research experience of students. This chapter explores a number of educational concepts within the content of the marble programme.keywordsexcellenceproblem-based learningresearch-based learningundergraduate research

Reflection and lessons learned

In this final chapter, we will take a more reflective look at the case studies and the overall maastricht research-based learning (marble) programme from two different perspectives. First, the case studies will be positioned in the models of healey and jenkins (developing undergraduate research and inquiry. Higher education academy, york, 2009), beckman and hensel (cur q 29(4):40–44, 2009), and van merriënboer (training complex cognitive skills: a four-component instructional design model for technical training. Educational technology publications, englewood cliffs, 1997). Second, general themes will be distilled from the different case studies. Finally, the chapter concludes with a description of general lessons learned and a final thought on the implementation of research-based learning projects.keywordscourse evaluationeducational modelsproblem-based learningresearch-based learningundergraduate research

Three educational models for positioning the Maastricht research-based learning programme

This chapter introduces three models describing approaches of research-based learning for the further refinement of undergraduate research at maastricht university. The first model by healey and jenkins (developing undergraduate research and inquiry. Higher education academy, york, 2009) focuses on the role of the student (active participant or audience) and the scope of the research programme (research content or research processes and problems). The second model by beckman and hensel (cur q 29(4):40–44, 2009) distinguishes eight continua for further refining the concept of undergraduate research. The third model by van merriënboer (training complex cognitive skills: a four-component instructional design model for technical training. Educational technology publications, englewood cliffs, 1997) focuses on the level of maturity of the students and the level of independence provided to them during their research project. In the early days of the maastricht research-based learning (marble) project, there was little room to draw up a more structured approach for research-based learning. Introducing these models to the marble coordinators resulted in – to say the least – very interesting discussions among the coordinators, as the application of the models provided more in-depth insights into how research-based learning could be designed and what it means to staff and students. Therefore, the models presented in this chapter will serve as analytical tools in order to capture the different forms of research-based learning as presented in this volume’s case study chapters.keywordseducational modelsinstructional designresearch-based learningundergraduate research

Vacationers Happier, but Most not Happier After a Holiday

The aim of this study was to obtain a greater insight into the association between vacations and happiness. We examined whether vacationers differ in happiness, compared to those not going on holiday, and if a holiday trip boosts post-trip happiness. These questions were addressed in a pre-test/post-test design study among 1,530 Dutch individuals. 974 vacationers answered questions about their happiness before and after a holiday trip. Vacationers reported a higher degree of pre-trip happiness, compared to non-vacationers, possibly because they are anticipating their holiday. Only a very relaxed holiday trip boosts vacationers’ happiness further after return. Generally, there is no difference between vacationers’ and non-vacationers’ post-trip happiness. The findings are explained in the light of set-point theory, need theory and comparison theory

Les droits disciplinaires des fonctions publiques : « unification », « harmonisation » ou « distanciation ». A propos de la loi du 26 avril 2016 relative à la déontologie et aux droits et obligations des fonctionnaires

The production of tt‾ , W+bb‾ and W+cc‾ is studied in the forward region of proton–proton collisions collected at a centre-of-mass energy of 8 TeV by the LHCb experiment, corresponding to an integrated luminosity of 1.98±0.02 fb−1 . The W bosons are reconstructed in the decays W→ℓν , where ℓ denotes muon or electron, while the b and c quarks are reconstructed as jets. All measured cross-sections are in agreement with next-to-leading-order Standard Model predictions.The production of $t\overline{t}$, $W+b\overline{b}$ and $W+c\overline{c}$ is studied in the forward region of proton-proton collisions collected at a centre-of-mass energy of 8 TeV by the LHCb experiment, corresponding to an integrated luminosity of 1.98 $\pm$ 0.02 \mbox{fb}^{-1}. The $W$ bosons are reconstructed in the decays $W\rightarrow\ell\nu$, where $\ell$ denotes muon or electron, while the $b$ and $c$ quarks are reconstructed as jets. All measured cross-sections are in agreement with next-to-leading-order Standard Model predictions

Study of forward Z + jet production in pp collisions at √s=7 TeV

A measurement of the $Z(\rightarrow\mu^+\mu^-)$+jet production cross-section in $pp$ collisions at a centre-of-mass energy $\sqrt{s} = 7$ TeV is presented. The analysis is based on an integrated luminosity of $1.0\,\text{fb}^{-1}$ recorded by the LHCb experiment. Results are shown with two jet transverse momentum thresholds, 10 and 20 GeV, for both the overall cross-section within the fiducial volume, and for six differential cross-section measurements. The fiducial volume requires that both the jet and the muons from the Z boson decay are produced in the forward direction ($2.0<\eta<4.5$). The results show good agreement with theoretical predictions at the second-order expansion in the coupling of the strong interaction.A measurement of the $Z(\rightarrow\mu^+\mu^-)$+jet production cross-section in $pp$ collisions at a centre-of-mass energy $\sqrt{s} = 7$ TeV is presented. The analysis is based on an integrated luminosity of $1.0\,\text{fb}^{-1}$ recorded by the LHCb experiment. Results are shown with two jet transverse momentum thresholds, 10 and 20 GeV, for both the overall cross-section within the fiducial volume, and for six differential cross-section measurements. The fiducial volume requires that both the jet and the muons from the Z boson decay are produced in the forward direction ($2.0<\eta<4.5$). The results show good agreement with theoretical predictions at the second-order expansion in the coupling of the strong interaction

A study of CP violation in B-+/- -&gt; DK +/- and B-+/- -&gt; D pi(+/-) decays with D -&gt; (KSK +/-)-K-0 pi(-/+) final states

A first study of CP violation in the decay modes $B^\pm\to [K^0_{\rm S} K^\pm \pi^\mp]_D h^\pm$ and $B^\pm\to [K^0_{\rm S} K^\mp \pi^\pm]_D h^\pm$, where $h$ labels a $K$ or $\pi$ meson and $D$ labels a $D^0$ or $\overline{D}^0$ meson, is performed. The analysis uses the LHCb data set collected in $pp$ collisions, corresponding to an integrated luminosity of 3 fb$^{-1}$. The analysis is sensitive to the CP-violating CKM phase $\gamma$ through seven observables: one charge asymmetry in each of the four modes and three ratios of the charge-integrated yields. The results are consistent with measurements of $\gamma$ using other decay modes