119477059
RECENT RESULTS ON CP-VIOLATION AT THE BABAR AND BELLE B-FACTORIES
New results on CP violation measurements performed on events collected at the Υ(4S) in upto 432 fb-1 of data at the BABAR experiment and upto 770 fb-1 of data collected at the Belle experiment. The measurements provide new constraints on the unitarity triangle angles γ and β. The measurements presented include: results from BABAR and Belle on CPV using Dalitz plot analyses, measurements of the CKM angle γ using a GLW analysis of B → DK± decays and from using B → D*°K- decays and results on yCP using D° mixing.
120215204
Monolithic CMOS pixel detector for international linear collider vertex detection
A monolithic CMS pixel detector is under development for an ILC experiment. This chronopixel array provides a time stamp resolution of one bunch crossing, a critical feature for background suppression. The status of this effort is summarized.
116064451
Chargino and Neutralino Mass Reconstruction for Small Mass Difference Non-Universal Sugra Points
A collapsible, movable apparatus, for containing health-sports devices and equipment, which includes a telescoping post support having at least two telescoping segments and a ratchet device for moving each of the adjacent telescoping segments in relation to each other. There is a support adopted to fit slideably on the top telescoping segment without overlapping onto the next telescoping segment. A large horizontally-positioned ring is mounted on the support. A platform is pivotally mounted under the ring so as to be able to swing downwardly when unconnected from the ring. Also, a basketball backboard is vertically mounted to the top portion of the top telescoping segment. The bottom end of the telescoping post is adapted to fit into a tube positioned in the ground or other horizontal surface.
118033184
Status of the Compact Muon Solenoid Detector at the Large Hadron Collider
The Compact Muon Solenoid (CMS) detector is being constructed at the Large Hadron Collider (LHC) at CERN for the purpose of exploring new physics in proton‐proton collisions at 14 TeV. The detector is to be designed, constructed and commissioned in time for the start of the LHC in April 2007. This article summarizes the current status of the detector and foreseen program for completion.
2708913
Monolithic CMOS Pixel Detectors for ILC Vertex Detection
A CMOS pixel vertex detector suited for use at the International Linear Collider (ILC) is proposed. The proposed detector consists of 50µm ◊ 50µm macropixels, each with integrated bunch clock memory, on top of 5µm ◊ 5µm micropixels that record amplitude information. The micropixels integrate over all bunch crossing in a train. Using the time recorded by the macropixels, the fine position measurements made in the micropixels can be associated to only a few of the 3000 bunch crossings in a bunch train.
111420431
Ideas on DC-DC Converters for Delivery of Low Voltage and High Currents for the SLHC / ILC Detector Electronics in Magnetic field and Radiation environments
For more efficient power transport to the electronics embedded inside large colliding beam detectors, we explore the feasibility of supplying 48 Volts DC and using local DCDC conversion to 2 V (or lower, depending upon on the lithography of the embedded electronics) using switch mode regulators located very close to the front end electronics. These devices will be exposed to high radiation and high magnetic fields, 10 – 100 Mrads and 2 4 Tesla at the SLHC, and 20 Krads and 6 Tesla at the ILC.
111321675
Shaping Collaboration 2006: action items for the LHC
Shaping Collaboration 2006 [1] was a workshop held in Geneva, on December 11-13, 2006, to examine the status and future of collaborative tool technology and its usage for large global scientific collaborations, such as those of the CERN LHC [2]. The workshop brought together some of the leading experts in the field of collaborative tools (WACE 2006) [3] with physicists and developers of the LHC collaborations and HENP (High-Energy and Nuclear Physics). We highlight important presentations and key discussions held during the workshop, then focus on a large and aggressive set of goals and specific action items targeted at institutes from all levels of the LHC organization. This list of action items, assembled during a panel discussion at the close of the LHC sessions, includes recommendations for the LHC Users, their Universities, Project Managers, Spokespersons, National Funding Agencies and Host Laboratories. We present this list, along with suggestions for priorities in addressing the immediate and long-term needs of HENP.
10834674
Linear array of photodiodes to track a human speaker for video recording
Communication and collaboration using stored digital media has garnered more interest by many areas of business, government and education in recent years. This is due primarily to improvements in the quality of cameras and speed of computers. An advantage of digital media is that it can serve as an effective alternative when physical interaction is not possible. Video recordings that allow for viewers to discern a presenter's facial features, lips and hand motions are more effective than videos that do not. To attain this, one must maintain a video capture in which the speaker occupies a significant portion of the captured pixels. However, camera operators are costly, and often do an imperfect job of tracking presenters in unrehearsed situations. This creates motivation for a robust, automated system that directs a video camera to follow a presenter as he or she walks anywhere in the front of a lecture hall or large conference room. Such a system is presented. The system consists of a commercial, off-the-shelf pan/tilt/zoom (PTZ) color video camera, a necklace of infrared LEDs and a linear photodiode array detector. Electronic output from the photodiode array is processed to generate the location of the LED necklace, which is worn by a human speaker. The computer controls the video camera movements to record video of the speaker. The speaker's vertical position and depth are assumed to remain relatively constant– the video camera is sent only panning (horizontal) movement commands. The LED necklace is flashed at 70Hz at a 50% duty cycle to provide noise-filtering capability. The benefit to using a photodiode array versus a standard video camera is its higher frame rate (4kHz vs. 60Hz). The higher frame rate allows for the filtering of infrared noise such as sunlight and indoor lighting–a capability absent from other tracking technologies. The system has been tested in a large lecture hall and is shown to be effective.
15373519
Opportunities for Use and Development of Collaborative Tools in ATLAS
This document presents an assessment of the current and expected needs of the ATLAS Collaboration in the development, deployment, usage, and maintenance of collaborative tools to facilitate its internal and external communications, member training, education, and public outreach. It is prepared in response to a request by the ATLAS management to investigate these needs, to survey the current status, and to propose solutions where needed. We conclude the document with a set of recommendations designed to address selected immediate needs and to position the Collaboration for the anticipated growing demands for collaborative tools in a Grid-enabled analysis environment. 2 Opportunities for Use and Development of Collaborative Tools in ATLAS
122604408
Measurement of the Depolarization Parameter in Elastic Proton Proton Scattering at 3 and 6-GeV/c
Results are presented from an experiment designed to make the first systematic study of the depolarization parameter in elastic proton--proton scattering at high energies. Measurements were made at 3.0 and 6.0 GeV/c at abs. value t values extending to 1.7 (GeV/c)2 at the higher momentum. A high- intensity unpolarized proton beam was incident on a polarized proton target and the polarization of the elastically scattered recoil protons was determined with a carbon analyzer. The results are discussed in the framework of optical and exchange models.
125574883
LARGE ANGLE PROTON--PROTON ELASTIC SCATTERING AT INTERMEDIATE MOMENTA.