Showing papers by "Sandor Czellar published in 2007"
TL;DR: In this article, the authors present a detailed analysis of the performance of the Large Hadron Collider (CMS) at 14 TeV and compare it with the state-of-the-art analytical tools.
Abstract: CMS is a general purpose experiment, designed to study the physics of pp collisions at 14 TeV at the Large Hadron Collider (LHC). It currently involves more than 2000 physicists from more than 150 institutes and 37 countries. The LHC will provide extraordinary opportunities for particle physics based on its unprecedented collision energy and luminosity when it begins operation in 2007. The principal aim of this report is to present the strategy of CMS to explore the rich physics programme offered by the LHC. This volume demonstrates the physics capability of the CMS experiment. The prime goals of CMS are to explore physics at the TeV scale and to study the mechanism of electroweak symmetry breaking--through the discovery of the Higgs particle or otherwise. To carry out this task, CMS must be prepared to search for new particles, such as the Higgs boson or supersymmetric partners of the Standard Model particles, from the start-up of the LHC since new physics at the TeV scale may manifest itself with modest data samples of the order of a few fb−1 or less. The analysis tools that have been developed are applied to study in great detail and with all the methodology of performing an analysis on CMS data specific benchmark processes upon which to gauge the performance of CMS. These processes cover several Higgs boson decay channels, the production and decay of new particles such as Z' and supersymmetric particles, Bs production and processes in heavy ion collisions. The simulation of these benchmark processes includes subtle effects such as possible detector miscalibration and misalignment. Besides these benchmark processes, the physics reach of CMS is studied for a large number of signatures arising in the Standard Model and also in theories beyond the Standard Model for integrated luminosities ranging from 1 fb−1 to 30 fb−1. The Standard Model processes include QCD, B-physics, diffraction, detailed studies of the top quark properties, and electroweak physics topics such as the W and Z0 boson properties. The production and decay of the Higgs particle is studied for many observable decays, and the precision with which the Higgs boson properties can be derived is determined. About ten different supersymmetry benchmark points are analysed using full simulation. The CMS discovery reach is evaluated in the SUSY parameter space covering a large variety of decay signatures. Furthermore, the discovery reach for a plethora of alternative models for new physics is explored, notably extra dimensions, new vector boson high mass states, little Higgs models, technicolour and others. Methods to discriminate between models have been investigated. This report is organized as follows. Chapter 1, the Introduction, describes the context of this document. Chapters 2-6 describe examples of full analyses, with photons, electrons, muons, jets, missing ET, B-mesons and τ's, and for quarkonia in heavy ion collisions. Chapters 7-15 describe the physics reach for Standard Model processes, Higgs discovery and searches for new physics beyond the Standard Model
973 citations
TL;DR: In this paper, the capabilities of the CERN Large Hadron Collider (LHC) experiment to explore the rich heavy-ion physics program offered by the LHC are presented, and the potential of the CMS experiment to carry out a series of representative Pb-Pb measurements.
Abstract: This report presents the capabilities of the CMS experiment to explore the rich heavy-ion physics programme offered by the CERN Large Hadron Collider (LHC). The collisions of lead nuclei at energies , will probe quark and gluon matter at unprecedented values of energy density. The prime goal of this research is to study the fundamental theory of the strong interaction ? Quantum Chromodynamics (QCD) ? in extreme conditions of temperature, density and parton momentum fraction (low-x).This report covers in detail the potential of CMS to carry out a series of representative Pb-Pb measurements. These include bulk observables, (charged hadron multiplicity, low pT inclusive hadron identified spectra and elliptic flow) which provide information on the collective properties of the system, as well as perturbative probes such as quarkonia, heavy-quarks, jets and high pT hadrons which yield tomographic information of the hottest and densest phases of the reaction.
361 citations
21 Oct 2007-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this article, a Transient Current Technique (TCT) measurement setup was constructed at the CERN RD39 Collaboration, which is capable of operating below liquid nitrogen temperatures and can extract the full depletion voltage, effective trapping time, electric field distribution and the sign of the space charge in silicon bulk.
Abstract: The CERN RD39 Collaboration has constructed a Transient Current Technique (TCT) measurement setup, which is capable to operate below liquid nitrogen temperatures. By analyzing the current transients, it is possible to extract the full depletion voltage, effective trapping time, electric field distribution and the sign of the space charge in the silicon bulk. Our results show that the effective space charge and trapping can be manipulated by charge injection and temperature. This might allow significantly higher Charge Collection Efficiency (CCE) compared to the detectors operating under normal reverse bias and at temperatures from 0 to - 30 ∘ C .
20 citations
12 Mar 2007
7 citations
Posted Content•
01 Jan 2007
TL;DR: In this paper, three experiments investigate the role of expertise as a moderator of the relationship between implicit and explicit measures of attitudes and find that expertise plays an important role in the role.
Abstract: In this paper, three experiments investigate the role of expertise as a moderator of the relationship between implicit and explicit measures of attitudes
3 citations
Posted Content•
TL;DR: In this article, the authors investigated whether and under which conditions consistency between brand name and logo may positively influence consumer attitudes toward brands through three studies, and found a strong positive correlation between general brand evaluations and brand-logo consistency ratings.
Abstract: This is an investigation into whether and under which conditions consistency between brand name and logo may positively influence consumer attitudes toward brands through three studies. The descriptive design in Study 1 highlights a strong positive correlation between general brand evaluations and brand-logo consistency ratings. Two experiments show that perceived initial consistency between brand name and logo, preference for consistency as well as brand status moderate the effect of brand name-logo consistency on brand attitudes. Taken together, our three studies represent a step toward a comprehensive framework into understanding how integrated brand communications contribute to positive brand attitudes.
2 citations
Posted Content•
TL;DR: This article found that both low and high self-monitors share positive automatic attitudes about status, but low self-monitoring seem to rely on these automatic associations to make explicit status judgments whereas high selfmonitoring do less so.
Abstract: Prior research has highlighted the role of self-monitoring as a key individual trait impacting consumer behavior. In an extensive review, Gangestad and Snyder (2000) identified a need for research investigating the role of status motivation in self-monitoring. This research constitutes an answer to their call from an implicit cognition perspective. To do this, we rely on the motivation and opportunity as determinants of attitude-behavior processes model (MODE, Fazio and Towles-Schwen 1999). Results indicate that both low- and high self-monitors share positive automatic attitudes about status. However, low self-monitors seem to rely on these automatic associations to make explicit status judgments whereas high self-monitors do less so. These results integrate prior findings in consumer research and open up avenues for future inquiry.