117801509
Lambda/b polarization study in the ATLAS experiment.
From preliminary studies it has been estimated that approximately 75000Λb will be available in the first years of the ATLAS running with integrated luminosity of 30fb−1, and we will be able to measure the polarization with accuracy of about 2%. In this paper we present the technical feasibility of measuring the polarization of Λb hyperons in ATLAS experiment.
6080091
Hyperon Polarization in a Quark‐Quark Scattering Model
A continuing mystery in particle physics is the large polarization observed in inclusive hyperon production in high energy proton‐proton collisions. A model in which quarks become polarized in a direct quark‐quark scattering process is proposed to explain the observed pattern of the polarization in the hyperon system. We find that in this picture hyperon and elastic p‐p polarizations, which previously seemed unrelated, may have a simple and common origin.
115209317
Advances in the Study of Spin Effects in Nucleon-Nucleon Scattering at Small and Intermediate Momentum Transfers
There has been remarkable progress made in the field of high energy physics in the past five years. We have recently witnessed the discovery of new quantum numbers, the spectra of particles associated with these quantum numbers, and a much improved understanding of the role that all quantum numbers play in high energy interactions. With the wide assortment of experiments and studies being conducted in high energy physics at any one time, it is very easy for one to get the impression that, the activity in the field is highly unfocused. On the one hand, it is precisely this apparent unfocused nature that has given rise to much of the excitement and richness of the field. On the other hand, as one examines the situation more closely, one finds that much of the effort in the field is indeed directed toward the solution of a few central problems. One of these problems which I will continually refer to today is that of understanding the details of the structure of the elementary particles. This problem—one of the most fascinating and most difficult problems ever tackled by man-can be approached from several different angles.
125574883
LARGE ANGLE PROTON--PROTON ELASTIC SCATTERING AT INTERMEDIATE MOMENTA.
121775566
Backward pi+p Elastic Scattering from 2.18 to 5.25 GeVc
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.
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.
43440817
SLD results on B physics
Results on B-lifetimes, Bdo and Bso mixing, and B decay charm counting studies from the SLD experiment at the Stanford Linear Accelerator Center are presented. These results which exploit the small stable beam spots and high precision detector and the polarized electron beam are among the most precise measurements to date.
122403410
Data preservation and long term accessibility in high energy physics at the 2nd International Conference on Frontiers in Diagnostic Technologies in Frascati, Italy
Abstract Recently there have been significant developments in high energy physics (HEP) data preservation projects while other large data volume experiments are now also facing for the first time insuring the long term accessibility of their data. In this presentation, the status of advanced HEP data preservation projects as well as the challenges and plans for projects newly facing this task will be presented. The continuing efforts to develop guidelines and tools, the justifications for these efforts and the state of discussions of more open accessibility of the data and how this is foreseen to be managed are included.
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.
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.