82 research outputs found
Physics Study of the Higgs Decay Channel H -> WW -> 2mu 2nu
No full textWe report the physics study of the Higgs decay channel H -> WW -> 2mu 2nu, performed using Monte Carlo generated data processed by the CMS full simulation and reconstruction programs. The optimization of the selection criteria and the study of the different background contributions are reported, describing in detail the methods developed to evaluate the related systematical uncertainties. The cross sections of the relevant physics processes, estimated at the leading order (LO) in the full simulation, are corrected at the next-to-leading order (NLO), and the resulting expected signal significance is given as a function of the Higgs mass
Herrn Carl Friederich Drollingers, weiland Hochfürstlich-Baden-Durlachischen Hofraths und geheimen Archivhalters, Gedichte, samt andern dazu gehörigen Stücken, wie auch einer Gedächtnissrede auf Denselben
No full textS. 1-253 Erster Teil enthaltend die von dem seligen Herrn Verfasser eigenhändig zusammengetragenen SchriftenS. 254-397 Zweyter Teil, enthaltend die, aus des seligen Herrn Verfassers hinterlassenen Papyren, zusammengelesene Schriften, samt einem Anhange etlicher fremden, Jhn betreffenden, StückeS. 187-245 Versuch von den Eigenschaften eines Kunstrichters Alexander Popen ; Durch Herrn C.F. Drollinger übersetzt, und mit Anmerkungen von J.J. Sprengen begleitetausgefertiget von J.J. Sprengen, D.H.W. der deutschen Beredsamkeit und Poesie öffentlichem Lehrer zu Basel, wie auch der D.H. in Leipzig und Bern MitglideMit Titelkupfer und Porträt des VerfassersTitelseite in Rot-Schwarz-DruckVirgeln der Vorlage durch Kommata wiedergegebenDigitalisierung=Digitization=Numérisation April 2021 TIFF Exemplar Am IV 8:
Getting ready for Physics at the LHC with the CMS Detector
No full textIn order to get ready for physics at the LHC, the CMS experiment has to be set up for data taking. The data have to be well understood before new physics can be investigated. On the other hand, there are standard processes, well known from previous experiments and from simulation, which will help to understand the data of the detector in the early days of the LHC.In order to get ready for physics at the LHC, the CMS experiment has to be set up for data taking. The data have to be well understood before new physics can be investigated. On the other hand, there are standard processes, well known from previous experiments and from simulation, which will help to understand the data of the detector in the early days of the LHC
Uintah School District
No full textA tour by black students was held at the Ute Reservation. From left are, Grant Drollinger, Title I director; Dr. Theodoshia V. Woolfolk, Norwood Hardy, principal of Todd Elementary, and Superintendent Ashel J. Evans
Finding H0 ---> b anti-b at the LHC
No full textWe have investigated the sensitivity of CMS for finding the Higgs boson in the H0 -> bbbar channel. An excellent b-tagging performance and a good jet resolution are the main requirements needed for a successful event selection. In the Standard Model (SM), the ttbar H0 -> l+- nu qqbar bbbar bbbar channel is accessible, if the Higgs mass is lighter than m(H0) = 125 GeV, already during the first years of the LHC. Also, most of the MSSM (Minimal Supersymmetric Standard Model) parameter space can be covered. The W+- H0 -> l+- nu bbbar channel is only accessible with high luminosity at the LHC. In both channels the mass can be determined with a precision of a few per cent and the Higgs couplings at the level of 10%
Rekonstruktions- und Analysemethoden fuer die Suche nach Higgs-Bosonen im Zerfallskanal H"0 -> bb an Hadronenbeschleunigern
No full textIn this work, reconstruction and analysis methods for several channels with H"0 #-># bb decay are developed for the first time, in the CMS collaboration. Of course, these methods can be applied at the LHC in general. To some extend, they are also useful at the Tevatron, where the Higgs boson searches depend even more on channels with bb in the final states. After an introduction, where more general topics are explained, the specific studies of this work are discussed: reconstruction and analysis methods for Higgs bosons in the bb decay mode. In the same context, the CMS detector performance and the resulting physics reach is evaluated. (orig.)SIGLEAvailable from TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman
Comparison of Higgs Boson Mass and Width Determination of the LHC and a Linear Collider
No full textTwo important properties of a Higgs boson are its mass and width. They may distinguish the Standard Model Higgs boson from Higgs bosons of extended models. The methods are different for the LHC ( Large Hadron Collider) and an LC ( Linear Collider). We show results from a direct mass and width reconstruction for a large Higgs boson mass range from 120 to 340 GeV. The mass and width have been reconstructed from the H -> ZZ -> 4mu reaction in an LHC simulation. The mass result has been compared with the recoiling mass resolution in the associated Higgs production HZ where Z -> ll and in addition with the direct mass resolution of the H -> bb decay by scaling previous Linear Collider ( LC) simulation results according to the expected event rates. The relative error is between 0.05% and 0.15%. For the Higgs boson width we compare a direct determination with indirect methods and find good complementarity with a relative error of approximately 10% over the whole mass range
Bottom-quark fragmentation: comparing results from tuned event generators and resummed calculations
No full textWe study bottom-quark fragmentation in e+e- annihilation, top and Higgs decay H -> b bbar, using Monte Carlo event generators, as well as calculations, based on the formalism of perturbative fragmentation functions, which resum soft- and collinear-radiation effects in the next-to-leading logarithmic approximation. We consider the PYTHIA and HERWIG generators, and implement matrix-element corrections to the parton shower simulation of the H -> b bbar process in HERWIG. We tune the Kartvelishvili, string and cluster models to B-hadron data from LEP and SLD, and present results in both x_B and moment spaces. The B-hadron spectra yielded by HERWIG, PYTHIA and resummed calculations show small discrepancies, which are due to the different approaches and models employed and to the quality of the fits to the e+e- data.We study bottom-quark fragmentation in e+e- annihilation, top and Higgs decay H -> b bbar, using Monte Carlo event generators, as well as calculations, based on the formalism of perturbative fragmentation functions, which resum soft- and collinear-radiation effects in the next-to-leading logarithmic approximation. We consider the PYTHIA and HERWIG generators, and implement matrix-element corrections to the parton shower simulation of the H -> b bbar process in HERWIG. We tune the Kartvelishvili, string and cluster models to B-hadron data from LEP and SLD, and present results in both x_B and moment spaces. The B-hadron spectra yielded by HERWIG, PYTHIA and resummed calculations show small discrepancies, which are due to the different approaches and models employed and to the quality of the fits to the e+e- data.We study bottom-quark fragmentation in e+e- annihilation, top and Higgs decay H -> b bbar, using Monte Carlo event generators, as well as calculations, based on the formalism of perturbative fragmentation functions, which resum soft- and collinear-radiation effects in the next-to-leading logarithmic approximation. We consider the PYTHIA and HERWIG generators, and implement matrix-element corrections to the parton shower simulation of the H -> b bbar process in HERWIG. We tune the Kartvelishvili, string and cluster models to B-hadron data from LEP and SLD, and present results in both x_B and moment spaces. The B-hadron spectra yielded by HERWIG, PYTHIA and resummed calculations show small discrepancies, which are due to the different approaches and models employed and to the quality of the fits to the e+e- data.We study bottom-quark fragmentation in e+e- annihilation, top and Higgs decay H -> b bbar, using Monte Carlo event generators, as well as calculations, based on the formalism of perturbative fragmentation functions, which resum soft- and collinear-radiation effects in the next-to-leading logarithmic approximation. We consider the PYTHIA and HERWIG generators, and implement matrix-element corrections to the parton shower simulation of the H -> b bbar process in HERWIG. We tune the Kartvelishvili, string and cluster models to B-hadron data from LEP and SLD, and present results in both x_B and moment spaces. The B-hadron spectra yielded by HERWIG, PYTHIA and resummed calculations show small discrepancies, which are due to the different approaches and models employed and to the quality of the fits to the e+e- data.We study bottom-quark fragmentation in e + e − annihilation, top and Higgs decay H → b b ¯ , using Monte Carlo event generators, as well as calculations, based on the formalism of perturbative fragmentation functions, which resum soft- and collinear-radiation effects in the next-to-leading logarithmic approximation. We consider the PYTHIA and HERWIG generators, and implement matrix-element corrections to the parton shower simulation of the H → b b ¯ process in HERWIG. We tune the Kartvelishvili, string and cluster models to B -hadron data from LEP and SLD, and present results in both x B and moment spaces. The B -hadron spectra yielded by HERWIG, PYTHIA and resummed calculations show small discrepancies, which are due to the different approaches and models employed and to the quality of the fits to the e + e − data
- …
