Comparison of Horace and Photos Algorithms for Multi-Photon Emission in the Context of the W Boson Mass Measurement

The W boson mass measurement is sensitive to QED radiative corrections due to virtual photon loops and real photon emission. The largest shift in the measured mass, which depends on the transverse momentum spectrum of the charged lepton from the boson decay, is caused by the emission of real photons from the final-state lepton. There are a number of calculations and codes available to model the final-state photon emission. We perform a detailed study, comparing the results from the Horace and Photos implementations of the final-state multi-photon emission in the context of a direct measurement of the W boson mass at the Tevatron. Mass fits are performed using a simulation of the CDF II detector

An investigation of temperature distribution in cooled guide vanes

A numerical study to determine the temperature distribution in the guide vane blades of a radial inflow turbine is presented. A computer program was developed which permits the temperature distribution to be calculated when the blade is cooled internally using a combination of impingement and film cooling techniques. The study is based on the use of the finite difference method in a two dimensional heat conduction problem. The results are then compared to determine the best cooling configuration for a certain coolant to primary mass flow ratio

Black Hole Relics in Large Extra Dimensions

Recent calculations applying statistical mechanics indicate that under the assumption of compactified large extra dimensions a black hole might evolve into a (quasi-)stable state with mass close to the new fundamental scale $M_f$. Black holes and therefore their relics might be produced at the {\sc LHC} in the case of extra-dimensional topologies. In this energy regime, Hawking's evaporation scenario is modified due to energy conservation and quantum effects. We reanalyse the evaporation of small black holes including the quantisation of the emitted radiation due to the finite surface of the black hole. It is found that observable stable black hole relics with masses $\sim 1-3 M_f$ are formed which can be identified by a delayed single jet with a corresponding hard momentum kick to the relic and by ionisation, e.g. in a TPC

Accident Detection and Notification System Using Android

Now a day it is seen that there are number of vehicle and accident causing due to it is increasing day by day. Many people get injured and some of them even die due to unavailability of emergency facilities. The emergency responders take much long time to reach the spot which some time fail to save the lives. So to reduce this scenario there is need to decrease the time between the accidents occurred and the emergency facility provided to them. With the help of android phone which will detect the accident through collision detection circuit and notification will be sent to the known people using GSM which can be already noted and alert to hospital system and police station with alert message along with the link of map using GPS which will address the exact place of accident. DOI: 10.17762/ijritcc2321-8169.15034

Effects of multiple interactions and pileup on the W mass measurement in the electron channel at D0 in Run II and TeV33

At the D0 experiment the W mass has been measured in the electron channel using the calorimetric measurements of the electron`s transverse energy and the transverse energy of the hadronic system recoiling against the W boson. The authors discuss the effects of multiple interactions and pileup on the biases and resolutions of the calorimetric energy measurements and on the W mass measurement in Run 2 and TeV33