The 750 GeV Diphoton Excess May Not Imply a 750 GeV Resonance

We discuss non-standard interpretations of the 750 GeV diphoton excess recently reported by the ATLAS and CMS Collaborations which do not involve a new, relatively broad, resonance with a mass near 750 GeV. Instead, we consider the sequential cascade decay of a much heavier, possibly quite narrow, resonance into two photons along with one or more invisible particles. The resulting diphoton invariant mass signal is generically rather broad, as suggested by the data. We examine three specific event topologies - the antler, the sandwich, and the 2-step cascade decay, and show that they all can provide a good fit to the observed published data. In each case, we delineate the preferred mass parameter space selected by the best fit. In spite of the presence of invisible particles in the final state, the measured missing transverse energy is moderate, due to its anti- correlation with the diphoton invariant mass. We comment on the future prospects of discriminating with higher statistics between our scenarios, as well as from more conventional interpretations.Comment: Discussion about the ATLAS Moriond EW2016 added. Matched to PRL accepted versio

OPTIMASS: A Package for the Minimization of Kinematic Mass Functions with Constraints

Reconstructed mass variables, such as $M_2$, $M_{2C}$, $M_T^\star$, and $M_{T2}^W$, play an essential role in searches for new physics at hadron colliders. The calculation of these variables generally involves constrained minimization in a large parameter space, which is numerically challenging. We provide a C++ code, OPTIMASS, which interfaces with the MINUIT library to perform this constrained minimization using the Augmented Lagrangian Method. The code can be applied to arbitrarily general event topologies and thus allows the user to significantly extend the existing set of kinematic variables. We describe this code and its physics motivation, and demonstrate its use in the analysis of the fully leptonic decay of pair-produced top quarks using the $M_2$ variables.Comment: 39 pages, 12 figures, (1) minor revision in section 3, (2) figure added in section 4.3, (3) reference added and (4) matched with published versio

Evaluasi Teknis Dan Ekonomis Well Completion Untuk Ukuran Tubing Pada Sumur Minyak X-26 Di PT. Pertamina Ep Asset 2 Pendopo Field

Kemampuan berproduksi suatu sumur merupakan tolak ukur didalam perencanaan peralatan produksi, tujuannya untuk mendapatkan laju produksi yang optimal dan continous sesuai dengan target. Sistem peralatan produksi yang berfungsi untuk mengalirkan laju produksi kepermukaan yaitu tubing (pipa produksi). Ukuran tubing dan choke yang tidak sesuai dengan Productivity index dapat menghambat kesinambungan produksi minyak dari sumur minyak tersebut. Hal ini disebabkan sistem peralatan produksi akan cepat terkorosi akibat gesekan antara fluida produksi dengan dinding tubing,sehingga tubing cepat rusak dan diganti. Dan dapat menyebabkan kerusakan formasi (formation damage) dan terbentuknya scale. Tujuan dilakukan penelitian ini adalah untuk mendapatkan laju produksi yang maksimal. Untuk menentukan ukuran tubing pada sumur X-26 dapat dievaluasi melalui analisa sistem nodal, yang merupakan hubungan kurva IPR terhadap kurva tubing intake yang akan berpotongan. Titik perpotongan tersebut yang akan menunjukkan laju produksi optimal suatu sumur setiap ukuran tubing. Hasil dari evaluasi ukuran tubing diperoleh laju produksi optimal 105,4 bfpd dan dinilai tidak ekonomis untuk dilakukan penggantian tubing karena peningkatan laju produksinya sangat sediki

Sex disparities in treatment patterns after metformin initiation among patients with type 2 diabetes mellitus

PURPOSE: To assess sex differences in treatment patterns after metformin initiation among type 2 diabetes mellitus (T2D) patients.METHODS: A cohort study was conducted using the Groningen Initiative to ANalyze Type 2 diabetes Treatment (GIANTT) primary care database. Patients aged ≥18 years initiating metformin were followed 2-5 years. Markov modeling was conducted to estimate treatment transition rates and calculate adjusted hazard ratios (aHR) with 95% confidence intervals (CI) comparing men with women adjusted for age, HbA1c level at initiation, and cardiovascular disease history. Kaplan-Meier analyses and Cox proportional-hazards models were used to determine the time to and likelihood of getting treatment intensification. HbA1c levels at initiation and intensification were compared using Mann-Whitney U tests.RESULTS: In total, 11 508 metformin initiators were included (50.1% women). The most common transition after initiation was a dose increase (probability women 0.52, men 0.59, no significant difference). Women were more likely than men to switch to any other non-insulin hypoglycemic agent after initiation (aHR 1.66; 95% CI 1.31-2.12), after dose increase (aHR 1.48; 95% CI 1.10-1.98) and after dose decrease (aHR 2.64; 95% CI 1.28-5.46). Time to intensification was longer, time to switching was shorter, and HbA1c levels at initiation and intensification were lower for women than men.CONCLUSIONS: Sex disparities were observed in treatment transitions after metformin initiation. Women more often switched treatment than men, which suggest that prescribers acknowledge more tolerance or other problems for metformin in women. Men intensified treatment earlier and at higher HbA1c levels, indicative of a higher need for treatment intensification.</p

AGV Trajectory Control Based on Laser Sensor Navigation

Autonomous Guided Vehicle Systems (AGVs) are used to transport goods and products in manufacturing fields where navigation can be done in a structured environment. In order to track the given trajectory, a tracking control based on Lyapunov stability theory is introduced. The use of the nonlinear Lyapunov technique provides robustness for load disturbance and sensor noise. To apply Lyapunov\u27s theorem, the kinematic model of AGV is given. To recognize its position in indoor environment, in this paper, a laser sensor device NAV200 is used to detect the AGV position in real-time. For simulation and experiment, software and hardware are described. The AGV consists of 4 wheels with two passive wheels and two driving wheels. A controller is developed based on industrial computer. The effectiveness of the proposed controller is proved by simulation and experimental results.[AGV Trajectory Control, Laser Sensor Navigation

Realization of giant magnetoelectricity in helimagnets

We show that low field magnetoelectric (ME) properties of helimagnets Ba0.5Sr1.5Zn2(Fe1-xAlx)12O22 can be efficiently tailored by Al-substitution level. As x increases, the critical magnetic field for switching electric polarization is systematically reduced from ~1 T down to ~1 mT, and the ME susceptibility is greatly enhanced to reach a giant value of 2.0 x 10^4 ps/m at an optimum x = 0.08. We find that control of nontrivial orbital moment in the octahedral Fe sites through the Al-substitution is crucial for fine tuning of magnetic anisotropy and obtaining the conspicuously improved ME characteristics

MAX-DOAS measurements of formaldehyde in the Po-Valley

International audienceno abstract availabl

Soliton Induced Singularities in 2 d Gravity and their Evaporation

Positive energy singularities induced by Sine-Gordon solitons in 1+1 dimensional dilaton gravity with positive and negative cosmological constant are considered. When the cosmological constant is positive, the singularities combine a white hole, a timelike singularity and a black hole joined smoothly near the soliton center. When the cosmological constant is negative, the solutions describe two timelike singularities joined smoothly near the soliton center. We describe these spacetimes and examine their evaporation in the one loop approximation.Comment: 15 pages (37.7 kb), PHYZZX. Figures available from authors

An application of the Tree-Step Test-Interview (TSTI): A validation study of the Dutch and Norwegian versions of the 'Illegal Aliens Scale'

In this paper the results of a validation study of the Dutch and Norwegian versions of the Illegal Aliens (IA) Scale are discussed. The main objective is to evaluate the usefulness of the ThreeStep TestInterview (TSTI) as a pretesting method in a validation study. The TSTI is a new technique specifically developed to detect problems with selfcompletion questionnaires. The studys aims were twofold: (1) to evaluate the usefulness of the TSTI for detecting problems regarding attitude measurement; and (2) to identify potential problems with the IA Scale. The IA Scale is a Likerttype attitude scale consisting of 20 parallel interval items. Its main purpose is for large comparative sample studies of political and ideological attitudes, for example between subgroups within populations or between countries. The TSTI procedure appeared to be very productive in terms of the number and kind of problems that were found regarding the Dutch and Norwegian versions of the IA Scale. It is concluded that the TSTI is useful as a diagnostic tool in validation studies of instruments that are aimed at measuring attitudes