Publications


A. Papers & Articles

Medical Imaging

Contrast-enhancement, image noise, and dual-energy simulations for quantum-counting clinical CT
S. Kappler et al., Medical Imaging 2010: Physics of Medical Imaging. Edited by Samei, Ehsan; Pelc, Norbert J. Proceedings of the SPIE, Volume 7622, pp. 76223H-76223H-10 (2010).

A research prototype system for quantum-counting clinical CT
S. Kappler et al., Medical Imaging 2010: Physics of Medical Imaging. Edited by Samei, Ehsan; Pelc, Norbert J. Proceedings of the SPIE, Volume 7622, pp. 76221Z-76221Z-6 (2010).

Local orientation-dependent noise propagation for anisotropic denoising of CT-images
A. Borsdorf et al., 2009 IEEE Nuclear Science Symposium Conference Record (NSS/MIC), pp. 2474-2475, 2009.

A full-system simulation chain for computed tomography scanners
S. Kappler et al., 2009 IEEE Nuclear Science Symposium Conference Record (NSS/MIC), pp. 3433-3436, 2009.

Dual-energy performance of dual kVp in comparison to dual-layer and quantum-counting CT system concepts
S. Kappler et al., Medical Imaging 2009: Physics of Medical Imaging. Edited by Samei, Ehsan; Hsieh, Jiang. Proceedings of the SPIE, Volume 7258 (2009)., pp. 725842-725842-8 (2009).

Dual energy with dual source CT and kVp switching with single source CT: a comparison of dual energy performance
M. Grasruck et al., Medical Imaging 2009: Physics of Medical Imaging. Edited by Samei, Ehsan; Hsieh, Jiang. Proceedings of the SPIE, Volume 7258 (2009)., pp. 72583R-72583R-10 (2009).

Comparison of dual-kVp and dual-layer CT in simulations and real CT system measurements
S. Kappler et al., 2008 IEEE Nuclear Science Symposium Conference Record (NSS/MIC), pp. 4828-4831, 2008.

Analytic Noise Propagation for Anisotriopic Denoising of CT Images
A. Borsdorf et al., 2008 IEEE Nuclear Science Symposium Conference Record (NSS/MIC), pp. 5335-5338, 2008.

Analytic Noise Propagation in Indirect Fan-Beam FBP Reconstruction
A. Borsdorf et al., Proceedings of the 30th Annual International IEEE EMBC Conference, pp. 2701-2704, 2008.

Noise Adaptive Bilateral Filtering in Computed Tomography
A. Borsdorf et al., The 20th UCAIR Symposium (UCAIR Symposium Salt Lake City, USA 26.9.2008), pp. 24, 2008.

Detector Physics

    Development studies for the ILC: Measurements and simulations for a time projection chamber with GEM technology
    B. Ledermann et al., Nucl. Instr. and Meth., vol. A581, pp. 232-235, 2007.

    Studies With a GEM-TPC Prototype for the ILC: Dependencies of Spatial Resolution for Short Drift Distances in a 4T Magnetic Field
    B. Ledermann et al., IEEE Trans. Nucl. Sci., vol. 53, no. 5, 2006.

    Study of Various Anode Pad Readout Geometries in a GEM-TPC

    J. Kaminski et al., IEEE Trans. Nucl. Sci., vol. 52, no. 6, 2005.

    Development and studies of a Time Projection Chamber with GEMs
    J. Kaminski et al., Nucl. Instr. and Meth., vol. A535, pp. 201-205, 2004.

    A GEM-TPC Prototype with Low-Noise Highly Integrated Front-End Electronics for Linear Collider Studies 
    S. Kappler et al., IEEE Trans. Nucl. Sci., vol. 51, no. 3, 2004.

    Design and Construction of a GEM-TPC Prototype for R&D Purposes 
    S. Kappler et al., IEEE Trans. Nucl. Sci., vol. 51, no. 4, 2004.

    Electron Collection and Ion Feedback in GEM-Based Detectors
    F. Sauli, S. Kappler, L. Ropelewski, IEEE Trans. Nucl. Sci., vol. 50, pp. 803-808, 2003.

    Aging Measurements with the Gas Electron Multiplier 
    C. Altunbas et al., Nucl. Instr. and Meth., vol. A515, pp. 249-254, 2003.

    A fast Tracker for COMPASS based on the GEM
    B. Ketzer et al., Nucl. Phys. Proc.Suppl., vol. 125, pp. 368-373, 2003.

    Charge carrier transfer in the GEM at low gas gains 
    J. Kaminski et al., Proceedings of the International Workshop on Linear Colliders, Jeju Island (Korea), August 2002.

    Discharge studies and prevention in the Gas Electron Multiplier (GEM)
    S. Bachmann et al., Nucl. Instr. and Meth., vol. A479, pp. 294-308, 2002.

    High Rate X-Ray Imaging using Multi-GEM Detectors with a novel Readout Design 
    S. Bachmann et al., Nucl. Instr. and Meth., vol. A478, pp. 104-108, 2002.

    Construction, test and commissioning of the triple-GEM tracking detector for COMPASS
    C. Altunbas et al., Nucl. Instr. and Meth., vol. A490, pp. 177-203, 2002.

    Triple-GEM Tracking Detectors for COMPASS
    B. Ketzer et al., IEEE Trans. Nucl. Sci., vol. 49, pp. 2403-2410, 2002.

    GEM Detectors for COMPASS
    F. Simon et al., Proceedings of the 7th International Conference on ICATPP-7, Villa Olmo, Como, Italy 15 - 19 October 2001; published in 'Advanced Technology and Particle Physics', World Scientific, 2002.

    GEM Detectors for COMPASS
    B. Ketzer et al., IEEE Trans. Nucl. Sci., vol. 48, nr. 4, 2001.

    Development and applications of the Gas Electron Multiplier
    S. Bachmann et al., Nucl. Instr. and Meth., vol. A471, pp. 115-119, 2001.

    Performance of GEM detectors in high intensity particle beams
    S. Bachmann et al., Nucl. Instr. and Meth., vol. A470, pp. 548-561, 2001.

    Optimisation of the Gas Electron Multiplier for high rate application
    S. Bachmann et al., Nucl. Instr. and Meth., vol. A461, pp. 42-46, 2001.

    LC TPC R&D: A Proposal to the DESY PRC
    The LC TPC Group (M. Killenberg et al.), DESY-PRC-RD-01-03, Oct 2001.

Particle Physics & Statistical Data Analysis

Evidence for production of single top quarks
V.M. Abazov et al., Phys.Rev.D78:012005, 2008.

Search for scalar top quarks in the acoplanar charm jets and missing transverse energy final state in p anti-p collisions at s**(1/2) = 1.96-TeV
V.M. Abazov et al., Phys.Lett.B665:1-8, 2008.

Search for W-prime Boson Resonances Decaying to a Top Quark and a Bottom Quark
V.M. Abazov et al., Phys.Rev.Lett.100:211803, 2008.

Simultaneous measurement of the ratio B(t->Wb)/B(t->Wq) and the top quark pair production cross section with the D0 detector at s**(1/2) = 1.96-TeV
V.M. Abazov et al., Phys.Rev.Lett.100:192003, 2008.

First measurement of the forward-backward charge asymmetry in top quark pair production
V.M. Abazov et al., Phys.Rev.Lett.100:142002, 2008.

Model-independent measurement of the W boson helicity in top quark decays at D0
V.M. Abazov et al., Phys.Rev.Lett.100:062004, 2008.

Search for the lightest scalar top quark in events with two leptons in p anti-p collisions at s**(1/2) = 1.96-TeV
V.M. Abazov et al., Phys.Lett.B659:500-508, 2008.

Search for production of single top quarks via flavor-changing neutral currents at the Tevatron
V.M. Abazov et al., Phys.Rev.Lett.99:191802, 2007.

Measurement of the top quark mass in the lepton + jets channel using the Ideogram method
V.M. Abazov et al., Phys.Rev.D75:092001, 2007.

Evidence for production of single top quarks and first direct measurement of |Vtb|
V.M. Abazov et al., Phys.Rev.Lett.98:181802, 2007.

Search for the pair production of scalar top quarks in the acoplanar charm jet final state in p anti-p collisions at s**(1/2) = 1.96-TeV
V.M. Abazov et al., Phys.Lett.B645:119-127, 2007.

Measurement of the W boson helicity in top quark decay at D0
V.M. Abazov et al., Phys.Rev.D75:031102, 2007.

Measurement of the top quark mass in the dilepton channel
V.M. Abazov et al., Phys.Lett.B655:7, 2007.

Experimental discrimination between charge 2e/3 top quark and charge 4e/3 exotic quark production scenarios
V.M. Abazov et al., Phys.Rev.Lett.98:041801, 2007.

Multivariate searches for single top quark production with the D0 detector
V.M. Abazov et al., Phys.Rev.D75:092007, 2007.

Measurement of the top quark mass in the lepton+jets final state with the matrix element method
V.M. Abazov et al., Phys.Rev.D74:092005, 2006.

Search for W-prime boson production in the top quark decay channel
V.M. Abazov et al., Phys.Lett.B641:423-431, 2006.

Concepts, Developments & Advanced Applications of the PAX Toolkit  

S. Kappler et al.,  Proceedings of the conference on Computing in High Energy and Nuclear Physics (CHEP06), Bombay (India), 2006, physics/0605063.
    The PAX Toolkit and its Applications at Tevatron and LHC 
    S. Kappler et al.,  IEEE Trans. Nucl. Sci., vol. 53, no. 2, 2006.

    New Applications of PAX in Physics Analyses at Hadron Colliders
    M. Erdmann et al., Proceedings of the conference on Computing in High Energy and Nuclear Physics (CHEP04), Interlaken (Switzerland), 2004.

Physics Analysis Expert PAX: First Applications
M. Erdmann et al., Proceedings of the conference on Computing in High Energy and Nuclear Physics (CHEP03), La Jolla (USA), 2003, physics/0306085.

    Progress Report on Studies of the Channel ttH with H->bb and tt -> WW bb -> qq' mu nu bb for CMS in Full Simulation 
    S. Kappler et al., CERN CMS IN-2004/048 (PRS PHYSICS), 2004.

B. Theses

Higgs Search Studies in the Channel ttH with the CMS Detector at the LHC and Development of a GEM-based TPC Readout for Future Collider Experiments 
IEKP-KA 2004-17, Doctoral thesis at Karlsruhe University (Germany), July 2004.

Application of Multi-GEM Detectors in X-Ray Imaging 
IEKP-KA 2000-18, Diploma thesis at Karlsruhe University (Germany), September 2000.

C. Miscellaneous

Statistische Methoden der Datenverarbeitung in der Physik
Official script for the lectures given in summer 2005 at RWTH Aachen University (Germany)

Ethics in Science: Some Considerations
S. Franchoo and S. Kappler, Discussion note for the Pugwash Workshop on Science, Ethics and Society, Paris (France), June 2003

Experimentelle Teilchenphysik 
Official script for the lectures given in summer 1999 by W. de Boer at Karlsruhe University (Germany)