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Showing 1 to 20 of 100 for “"HerA"”.
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Jets in photoproduction at HERA
… in photoproduction using the H1 detector at HERA. The data sample comprises e + p data collected from 1995-97 with an integrated luminosity of 34.9 pb -1. Jets are found using the inclusive k algorithm with a minimum transverse momentum of the highest transverse momentum jet of 25 GeV. The …
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Die Alignierung des HERA-B Vertexdetektors
Diese Arbeit behandelt die Alignierung des HERA-B Vertexdetektors, der aus insgesamt 64 hochauflösenden Silizium-Streifendetektoren besteht, die über 2 m Länge verteilt sind und von denen 16 Gruppen in jeweils 2 Achsen mit einer gemessenen Reproduzierbarkeit von besser als 2 mym motorisch …
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Charakterisierung des HELIX-128-Auslesechips für HERA-b
… des inneren Spurkammersystems am Experiment HERA-B eingesetzt werden. Er besteht aus 128 ladungsempfindlichen, rauscharmen Vorverstärkern, einem analogen Zwischenspeicher sowie einem Multiplexer, der die auszulesenden Analogdaten zeitlich hintereinander ausgibt. Zusätzlich befindet sich …
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The readout system of the HERA-B Inner Tracker and prospects of HERA-B in the field of Drell-Yan physics
The HERA-B experiment at the HERA accelerator at DESY is designed and built to measure CP violation in the system of neutral B mesons. One sub-detector is the Inner Tracker, which is built of Micro-Strip Gas Chambers with Gas Electron Multiplier (GEM-MSGC) with about 120,000 readout channels. Using …
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The Low-Income Housing Tax Credit : HERA, ARRA and beyond
… the Housing and Economic Recovery Act of 2008 (HERA 2008), which contained numerous LIHTC amendments. In early 2009, Congress passed the American Recovery and Reinvestment Act of 2009 (ARRA), which temporarily converted the LIHTC program into a grant program. While HERA 2008 and ARRA were well …
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Rare phenomena and W production in electron proton scattering at HERA
… prediction is performed in ep collisions at HERA using H1 data corresponding to an integrated luminosity of 115 1/pb. All experimentally measurable event topologies involving electrons, photons, muons, neutrinos and jets with high transverse momenta are investigated. Events are classified …
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Search for Squark Production in R-Parity Violating Supersymmetry at HERA
… have been investigated using the H1 detector at HERA. No deviation from the Standard Model has been found and exclusion limits in various supersymmetric models have been derived.
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Leistungsmerkmale des HERA-B Vertexdetektors und Suche nach semileptonischen Charm-Zerfällen
Das HERA-B Experiment, welches ursprünglich zur Messung der CP-Verletzung im B-System ausgelegt wurde, besitzt ein hochauflösendes Vertexdetektorsystem (VDS), das Anfang 2000 seine volle Leistungsfähigkeit erreicht hat. Die im Rahmen dieser Arbeit durchgeführten Qualitätskontrollen der in Modulen …
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Diffractive jet production in deep inelastic e + p collisions at HERA
… system Y. Data taken with the H1 detector at HERA, corresponding to an integrated luminosity of 18.0 pb-1, are used to measure hadron level single and double differential cross sections for 4<Q^2<80 GeV^2, x-pom<0.05 and pT-jet>4 GeV. The energy flow not attributed to jets is investigated. …
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Mass spectroscopy of neutral mesons in the photon hemisphere at HERA
… neutraler Mesonen mit dem Detektor H1 bei HERA ist das Thema dieser Arbeit. Der inklusive Wirkungsquerschnitt fuer die pi0- und eta-Produktion ist als Funktion der Transversalimpulse und der Rapiditaeten der Mesonen bei einer mittleren Schwerpunktsenergie des Photon-Proton-Systems von …
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Untersuchung zur Rekonstruktion von D*+- -Mesonen in Photoproduktion am H1-Detektor bei HERA
In electron-proton collisions at the HERA collider ring of DESY charmed particles, especially charged excited D-mesons, are produced via the process of boson gluon fusion, their decay particles being detected in the H1 detector. In this thesis the cross section for the production of these charmed …
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Suche nach Kontakt-Wechselwirkungen und Gravitoneffekten in der tief-inelastischen Streuung bei HERA
… current events in deep inelastic scattering at HERA taken with the H1 detector are examined with respect to standard model expectations. The measured inclusive cross section ds/dQ2 for Q2>200 GeV2 in reactions e±p-->e±X is analysed in terms of contact interactions or graviton effects in …
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Exclusive Pomeron- and Odderon induced photoproduction of omega- and f2 mesons at HERA
… energies of $langle Wangleapprox 200$ GeV at HERA. The former process is thought to be induced by photon-Pomeron interactions, and its cross section is measured to be $sigma(gpoomega p)=(1.3 pm 0.2(ext{stat}) pm 0.2(ext{syst})),muext{b}$, where the decay $omegaopigao3gamma$ is used to analyse …
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A CMOS Mixed-Signal Readout Chip for the Microstrip Detectors of HERA-B
… die beim Nachweis von Elementarteilchen beim HERA-B Experiment (DESY, Hamburg) zum Einsatz kommen. HELIX128S-2 integriert 128 Verstärkerkanäle, bestehend aus einem schnellen (Anstiegszeit ca. 50 ns), rauscharmen (ENC = 474 e + 35 e/pF x Cin) Ladungsverstärker, der die Vorverstärkung der …
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Forward jet production in neutral current deep inelastic scattering with ZEUS at HERA
With the ZEUS experiment at the HERA collider at DESY (Hamburg) <br>deep inelastic electron-proton scattering can be investigated at a centre-of-mass energy of 318 GeV. Forward jets as a certain class of neutral current events are selected to probe different parton evolution models. The measured …
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The Votive Deposits from the Hera Sanctuary at Perachora: From Deposits to Maintenance
… I reassess the major votive deposits from the Heraion of Perachora—contained on the upper and lower terraces—excavated in the early 20thcentury. By investigating the stratigraphy in the areas associated with these deposits, I elucidate a more comprehensive understanding of Perachora’s …
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