PENINGKATAN AKTIFITAS DAN PRESTASI BELAJAR SISWA SMA MATEMATIKA MATERI LIMIT MELALUI MODEL TUTOR TEMAN SEBAYA (TTS) VARIASI

IMPROVEMENT OF LEARNING ACTIVITIES AND ACHIEVEMENTS OF SENIOR HIGH SCHOOL STUDENTS ON LESSONS OF LIMIT THROUGH VARIATION PEER-TEACHING MODELSThis research aims to improve Mathematics learning activities and improve mathematics learning achievement of the Limit material through the variation peer-teaching models model for class XI MIPA 3 students in the 2018/2019 academic year. This research was conducted at SMA Negeri 9 Bogor. This research was conducted from January 2019 to June 2019. The subjects in this Classroom Action Research were students of SMA Negeri 9 Bogor in class XI MIPA 3, totaling 35 students consisting of 13 male students and 22 female students. Data collection techniques with written tests and observations. Data analysis using comparative description analysis and qualitative description. The results of this Classroom Action Research are: students' mathematics learning activities in the initial conditions, cycle I and cycle II have increased. The average score of student learning activities in the initial conditions of 2.74 increased to 3.77 in the first cycle and increased to 4.30 in the second cycle, while the mathematics learning achievement of students in the initial conditions, cycle I and cycle II increased. The average value of student achievement in the initial conditions of 39.13 increased to 71.17 in the first cycle and increased to 88.13 in the second cycle. The percentage of students who completed also increased, in the initial condition, students who completed learning were only 17.14%, increasing to 50% in cycle I and increasing to 80% in cycle II. This increase is due to the variation peer-teaching models learning method, all students can be actively involved in learning. Students who are appointed as tutors are active in helping their group members overcome learning difficulties. Students who have difficulty learning actively ask questions and discuss with tutors who are their own friends

Anapole moment of the lightest neutralino in the cMSSM

We study the anapole moment of the lightest neutralino in the constrained Minimal Supersymmetric Standard Model (cMSSM). The electromagnetic anapole is the only allowed electromagnetic form factor for Majorana fermions, such as the neutralino. Since the neutralino is the LSP in many versions of the MSSM and therefore a candidate for dark matter, its characterization through its electromagnetic properties is important both for particle physics and for cosmology. We perform a scan in the parameter space of the cMSSM and find that the anapole moment is different from zero albeit very small ($< 10^{-3}$ GeV$^{-2}$). Combined with experimental constraints like the Higgs mass and the DM relic density, the allowed region of parameter space lies within the reach of future direct DM searches. Thus, the anapole moment could be used as a complementary constraint when studying the parameter space of the cMSSM and other similar models.Comment: 22 pages, 13 figures. arXiv admin note: substantial text overlap with arXiv:1206.505

One-Loop Electroweak Corrections to the Muon Anomalous Magnetic Moment Using the Pinch Technique

The definition of the physical properties of particles in perturbative gauge theories must satisfy gauge invariance as a requisite. The Pinch Technique provides a framework to define the electromagnetic form factors and the electromagnetic static properties of fundamental particles in a consistent and gauge-invariant form. We apply a simple prescription derived in this formalism to check the calculation of the gauge-invariant one-loop bosonic electroweak corrections to the muon anomalous magnetic moment.Comment: 6 pages and 1 eps figur

Rare top quark decays in extended models

Flavor changing neutral currents (FCNC) decays t to H + c, t to Z + c, and H to t + bar{c} are discussed in the context of Alternative Left-Right symmetric Models (ALRM) with extra isosinglet heavy fermions where FCNC decays may take place at tree-level and are only suppressed by the mixing between ordinary top and charm quarks, which is poorly constraint by current experimental values. The non-manifest case is also briefly discussed.Comment: Contributed talk given at the 10th Mexican Workhop on Particles and Fields, Morelia, Michoacan, Mexico, 7-12 Nov 200

Charge and Magnetic Moment of the Neutrino in the Background Field Method and in the Linear R_xi^L Gauge

We present a computation of the charge and the magnetic moment of the neutrino in the recently developed electro-weak Background Field Method and in the linear $R_{\xi}^L$ gauge. First, we deduce a formal Ward-Takahashi identity which implies the immediate cancellation of the neutrino electric charge. This Ward-Takahashi identity is as simple as that for QED. The computation of the (proper and improper) one loop vertex diagrams contributing to the neutrino electric charge is also presented in an arbitrary gauge, checking in this way the Ward-Takahashi identity previously obtained. Finally, the calculation of the magnetic moment of the neutrino, in the minimal extension of the Standard Model with massive Dirac neutrinos, is presented, showing its gauge parameter and gauge structure independence explicitly.Comment: Latex, 19 pages, 9 PS and 10 EPS figures. One reference added. Appendix B modified and Appendices C-E eliminated. To be published in Eur. Phys. J.