Hard-photon production with b jets at hadron colliders

We present total and differential cross sections for the production of a hard photon with up to two b jets at both the Tevatron with center-of-mass energy 1.96 TeV and the Large Hadron Collider with center-of-mass energy 8 TeV, including Next-to-Leading Order (NLO) QCD corrections and full b-quark mass effects. We study the theoretical uncertainty due to the residual renormalization- and factorization-scale dependence and explain its origin on the basis of the different subprocesses contributing to the NLO cross section. We specifically address the case of the production of a hard photon with at least one b jet and compare the NLO QCD predictions in both the Four- and Five-Flavor-Number Schemes to the experimental measurements obtained by CDF and D0.Comment: 33 pages, 50 postscript figure

Matching the Nagy-Soper parton shower at next-to-leading order

We present an MC@NLO-like matching of next-to-leading order QCD calculations with the Nagy-Soper parton shower. An implementation of the algorithm within the HELAC-DIPOLES Monte Carlo generator is used to address the uncertainties and ambiguities of the matching scheme. First results obtained using the Nagy-Soper parton shower implementation in DEDUCTOR in conjunction with the HELAC-NLO framework are given for the pp -> top anti-top j + X process at the LHC with sqrt(s)=8 TeV. Effects of resummation are discussed for various observables.Comment: 53 pages, 18 figures, 3 tables. References and a few typos corrected, acknowledgments added, dependence on the variation of the starting shower time corrected, version to appear in JHE

Off-shell Top Quarks with One Jet at the LHC: A comprehensive analysis at NLO QCD

We present a comprehensive study of the production of top quark pairs in association with one hard jet in the di-lepton decay channel at the LHC. Our predictions, accurate at NLO in QCD, focus on the LHC Run II with a center-of-mass energy of 13 TeV. All resonant and non-resonant contributions at the perturbative order ${\cal O}(\alpha_s^4 \alpha^4)$ are taken into account, including irreducible backgrounds to $t\bar{t}j$ production, interferences and off-shell effects of the top quark and the $W$ gauge boson. We extensively investigate the dependence of our results upon variation of renormalisation and factorisation scales and parton distribution functions in the quest for an accurate estimate of the theoretical uncertainties. Additionally, we explore a few possibilities for a dynamical scale choice with the goal of stabilizing the perturbative convergence of the differential cross sections far away from the $t\bar{t}$ threshold. Results presented here are particularly relevant for searches of new physics as well as for precise measurements of the top-quark fiducial cross sections and top-quark properties at the LHC.Comment: 51 pages, 36 figures, 6 tables, version to appear in JHE

Pengaruh Alat Ekspansi terhadap Temperatur dan Tekanan pada Mesin Pendingin Siklus Kompresi Uap

At this time the more widespread use of engine cooling of homes, offices, hotels, cars, hospitals, and industries. The use of engine cooling capacity varies from small to large. Engine cooling is the most widely used today is the engine cooling operating with vapor compression cycle. One of the basic components that operate the engine cooling vapor compression cycle is the expansion tools. The usefulness of the expansion tools is to reduce the pressure expansion of liquid refrigerant from the condenser exit and regulating the flow of refrigerant into the evaporator entrance. Expansion tools will regulate the flow of refrigerant can be manual or automatic. For optimal cooling requirements, it is important to determine the effect of expansion tools with temperature and pressure of the vapor compression engine cooling cycle is. The test using a thermostatic valve is more efficient compared with the capillary tube, this is due to the use of the thermostatic valve will provide temperature and working pressure lower than the capillary tube, so that the process will lead to greater heat absorption and compressor work will be lighter so the power consumption will be becomes smaller

Enhancement of Human Sensory and Motor Skills using Collaboration of Eye - Ear Focus and Body - Arm - Hand Gesture in No-Touch 3D Interactive Aircraft Game

Nowadays, human sensory and motor skills enhancement is very important to be alert from the effect of the Society 5.0 era. We propose the novel approach to enhance human sensory and motor skills using collaboration of senses focus and body parts gesture in no-touch3D interactive aircraft game. A player interacts with a virtual display using gestures of his body, arm, hand, or collaboration of them as a controller to engage in a 3D game. This game is based on an aircraft education theme. By sweeping the hand to the left or right, a player can select one of many different aircraft models according to its specification and performance are shown on the screen based on the estimation of his current skill. The mission is to control aircraft avoiding the random balls attack to prevent a collision. Hand and arm are positioned above a leap motion sensor and in front of a camera. The body, arm, and hand gesture directions are to forward or backward from the screen to the right or left, and also to up or down freely. This system is developed by using Unity 3D, OpenCV, and Python. Many skills are possible to be improved, e.g., motivation, discipline, safety awareness, endurance management, strategy, precision, intelligence, creativity, reliability, toughness, and vision. This project has been tested in the Air Force Museum of Dirgantara Mandala involving more than 1000 visitors as testing participants, and they all feel satisfied. The score is calculated by time in second. The results show endurance time is 32% (<60 s), 31% (<120 s), 25% (<160 s), and 12 % (180 s) of the total300 seconds of the gam

Top Quark Pair Production in Association with a Jet with NLO QCD Off-Shell Effects at the Large Hadron Collider

We present a complete description of top quark pair production in association with a jet in the dilepton channel. Our calculation is accurate to next-to-leading order in QCD (NLO) and includes all non-resonant diagrams, interferences and off-shell effects of the top quark. Moreover, non-resonant and off-shell effects due to the finite W gauge boson width are taken into account. This calculation constitutes the first fully realistic NLO computation for top quark pair production with a finalstate jet in hadronic collisions. Numerical results for differential distributions as well as total cross sections are presented for the Large Hadron Collider (LHC) at 8 TeV. With our inclusive cuts, NLO predictions reduce the unphysical scale dependence by more than a factor of 3 and lower the total rate by about 13% compared to leading order QCD (LO) predictions. In addition, the size of the top quark off-shell effects is estimated to be below 2%

Perancangan Media Promosi Pulau Kembang Sebagai Tujuan Pariwisata

Perancangan ini dilakukan untuk mempromosikan Taman Wisata Alam Pulau Kembang serta untuk meningkatkan citra Pulau Kembang sebagai tujuan wisata yang unik. Wisata hutan mangrove dan juga wisata sungai serta keberadaan kera-kera jinak penghuni kawasan ini membuat Pulau Kembang menjadi tempat yang tepat untuk mereka yang menginginkan wisata yang unik dan berbeda, namun keberadaan kawasan ini sendiri masih belum banyak diketahui oleh masyarakat Indonesia karena kurangnya promosi yang dilakukan untuk memperkenalkan Pulau Kembang. Perancangan ini dibuat sedemikian rupa berdasarkan permasalahan yang muncul seputar Taman Wisata Alam Pulau Kembang dan berdasarkan berbagai sumber sebagai pedoman pencapaian tujuan perancangan

Virtual QCD corrections to gluon-initiated diphoton plus jet production at hadron colliders

We present an analytic computation of the gluon-initiated contribution to diphoton plus jet production at hadron colliders up to two loops in QCD. We reconstruct the analytic form of the finite remainders from numerical evaluations over finite fields including all colour contributions. Compact expressions are found using the pentagon function basis. We provide a fast and stable implementation for the colour- and helicity-summed interference between the one-loop and two-loop finite remainders in C++ as part of the NJet library

Next-to-leading order predictions for Z gamma+jet and Z gamma gamma final states at the LHC

We present next-to-leading order predictions for final states containing leptons produced through the decay of a Z boson in association with either a photon and a jet, or a pair of photons. The effect of photon radiation from the final state leptons is included and we also allow for contributions arising from fragmentation processes. Phenomenological studies are presented for the LHC in the case of final states containing charged leptons and in the case of neutrinos. We also use the procedure introduced by Stewart and Tackmann to provide a reliable estimate of the scale uncertainty inherent in our theoretical calculations of jet-binned Z gamma cross sections. These computations have been implemented in the public code MCFM.Comment: 30 pages, 10 figure