Jet quenching measurements with ATLAS at LHC

A broad program of measurements is planned for heavy ion collisions in ATLAS. With up to a factor of 30 increase in collision energy compared to existing data, significant new insights are anticipated to be obtained with the first data measured. Global features of the LHC collisions will be accessible with the early data and will set the stage for the precision measurements to follow. ATLAS is particularly well suited for exploration of "jet quenching," the extinction of energetic jets in the hot dense medium. Observations of heavy quark jet suppression will be possible with unprecedented energy reach and statistical precision, potentially yielding new insights into the basic mechanisms involved.Comment: 5 pages, 3 figure

Impact simulator Patent

Lunar and planetary gravity simulator to test vehicular response to landin

J/{\Psi} and {\Psi}(2S) Production in p-Pb Collisions at 5.02 TeV with ATLAS

The production rates of heavy quarkonia in ion-ion collisions provide sensitive probes in the studies of the hot and dense matter formed in these collisions at high energies. However, a reference for understanding the behavior in the hot medium is necessary; p-A collisions open the possibility to study heavy quarkonia states in a smaller system of much lower average temperature. This is an important step in forming a baseline for understanding A-A collisions, as well as an investigation into the nature of modifications of the parton distributions in the nucleus. Using data collected at the LHC in 2013, we show results on the prompt J/{\Psi} and {\Psi}(2S) nuclear modification factors and the double ratio, {\Psi}(2S) divided by J/{\Psi} in p-Pb divided by the same in p-p, in p-Pb collisions at 5.02 TeV. The charmonia states were reconstructed via the dimuon decay channel and the yield is analyzed differentially in bins of transverse momentum, rapidity, and event activity.Comment: Proceedings contribution for the HARD PROBES 2015 Conference at McGill University in Montreal, June 29 - July 3, 2015. Four pages. To be published in Nuclear Physics B Proceedings Supplemen

Comment on What Collective Bargaining Promises and What it Does

[Excerpt] There can be no disagreement with Professor Jensen\u27s position that a belief in freedom is at the heart of our commitment to collective bargaining. These comments are a footnote to what he says about institutional accommodation and freedom in associations. My point is that acceptable institutional accommodation is achieved only when the institutions themselves do, in fact, offer choices to individuals and thus give freedom its essential meaning

Standard arc welders provide high amperage direct current source

Standard arc welders or power supplies are hooked up in parallel or series connections to obtain an adequate supply of current or voltage for various purposes. This method provides maximum flexibility in a wide range of voltages and currents

A universal formulation for conic trajectories. Basic variables and relationships

Truncated trigonometric functions for conic trajectory formulation in space flight application

Tungsten-rhenium alloy thermocouples effective for high-temperature measurement

Tungsten-rhenium alloy thermocouples, specifically, insulated, sheathed W/W plus 26Re and W plus 5 Re/W plus 26 Re thermocouples, are effective for temperature measurement in excess of 2920 degrees C. These thermocouples have a high thermoelectric output and excellent relationship to temperatures up to 2760 degrees C