T. Speer

Publication List Details

Period

2000 - 2009

Number

73

Co-Authors

Performance studies of the CMS Strip Tracker before installation (2009)

Adam, W, Bergauer, T, Dragicevic, M, Friedl, M, Frühwirth, R, Hansel, S, ...

In March 2007 the assembly of the Silicon Strip Tracker was completed at the Tracker Integration Facility at CERN. Nearly 15% of the detector was instrumented using cables, fiber optics, power...

B, D and K decays (2008)

Buchalla, G., Komatsubara, T. K., Muheim, F., Silvestrini, L., Artuso, M., Asner, D. M., ...

The present report documents the results of Working Group 2: B, D and K decays, of the workshop on Flavor in the Era of the LHC, held at CERN from November 2005 through March 2007. With the advent of...

B, D and K decays (2008)

Buchalla, G., Komatsubara, T. K., Muheim, F., Silvestrini, L., Artuso, M., Asner, D. M., ...

With the advent of the LHC, we will be able to probe New Physics (NP) up to energy scales almost one order of magnitude larger than it has been possible with present accelerator facilities. While...

Design and performance of the silicon sensors for the CMS barrel pixel detector (2008)

Allkofer, Y., Amsler, C., Bortoletto, D., Chiochia, V., Cremaldi, L., Cucciarelli, S., ...

The CMS experiment at the (LHC) includes a hybrid silicon pixel detector for the reconstruction of charged tracks and of the interaction vertices. The barrel region consists of n-in-n sensors with...

Design and performance of the silicon sensors for the CMS barrel pixel detector (2007)

Allkofer, Y., Amsler, C., Bortoletto, D., Chiochia, V., Cremaldi, L., Cucciarelli, S., ...

The CMS experiment at the LHC includes a hybrid silicon pixel detector for the reconstruction of charged tracks and of the interaction vertices. The barrel region consists of n-in-n sensors with...

CMS physics technical design report, volume II: Physics performance (2007)

Bayatian, G. L., Chatrchyan, S., Hmayakyan, G., Sirunyan, A. M., Adam, W., Bergauer, T., ...

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...

The CMS High Level Trigger (2006)

Adam, W., Bergauer, T., Deldicque, C., Ero, J., Fruehwirth, R., Jeitler, M., ...

At the Large Hadron Collider at CERN the proton bunches cross at a rate of 40MHz. At the Compact Muon Solenoid experiment the original collision rate is reduced by a factor of O (1000) using a...

Simulation of Heavily Irradiated Silicon Pixel Detectors (2006)

Swartz, M., Chiochia, V., Allkofer, Y., Amsler, C., Bortoletto, D., Cremaldi, L., ...

We show that doubly peaked electric fields are necessary to describe grazing-angle charge collection measurements of irradiated silicon pixel sensors. A model of irradiated silicon based upon two...

Impact of CMS Silicon Tracker Misalignment on Track and Vertex Reconstruction (2006)

Vanlaer, P, Barbone, L, De Filippis, N, Speer, T, Buchmüller, O L, Schilling, F P

The impact of misalignment on the performance of the CMS silicon tracking devices Pixel and silicon Strip tracker is studied. Misalignment scenarios are used which are expected to resemble the...

The CMS High Level Trigger (2006)

Adam, W, Bergauer, T, Deldicque, C, Ero, J, Frühwirth, R, Jeitler, Manfred, ...

At the Large Hadron Collider at CERN the proton bunches cross at a rate of 40MHz. At the Compact Muon Solenoid experiment the original collision rate is reduced by a factor of O (1000) using a...

Extraction of electric field in heavily irradiated silicon pixel sensors (2006)

Dorokhov, A., Allkofer, Y., Amsler, C., Bortoletto, D., Chiochia, V., Cremaldi, L., ...

A new method for the extraction of the electric field in the bulk of heavily irradiated silicon pixel sensors is presented. It is based on the measurement of the Lorentz deflection and mobility of...

Extraction of electric field in heavily irradiated silicon pixel sensors (2006)

Dorokhov, A., Allkofer, Y., Amsler, C., Bortoletto, D., Chiochia, V., Cremaldi, L., ...

A new method for the extraction of the electric field in the bulk of heavily irradiated silicon pixel sensors is presented. It is based on the measurement of the Lorentz deflection and mobility of...

A double junction model of irradiated silicon pixel sensors for LHC (2006)

Chiochia, V., Swartz, M., Allkofer, Y., Bortoletto, D., Cremaldi, L., Cucclarelli, S., ...

In this paper, we discuss the measurement of charge collection in irradiated silicon pixel sensors and the comparison with a detailed simulation. The simulation implements a model of radiation damage...

Observation, modeling, and temperature dependence of doubly peaked electric fields in irradiated silicon pixel sensors (2006)

Swartz, M., Chiochia, V., Allkofer, Y., Bortoletto, D., Cremaldi, L., Cucciarelli, S., ...

We show that doubly peaked electric fields are necessary to describe grazing-angle charge collection measurements of irradiated silicon pixel sensors. A model of irradiated silicon based upon two...

A double junction model of irradiated silicon pixel sensors for LHC (2006)

Chiochia, V., Swartz, M., Allkofer, Y., Bortoletto, D., Cremaldi, L., Cucclarelli, S., ...

In this paper, we discuss the measurement of charge collection in irradiated silicon pixel sensors and the comparison with a detailed simulation. The simulation implements a model of radiation damage...

Track reconstruction in the CMS tracker (2006)

Speer, T., Adam, W., Frühwirth, R., Strandlie, A., Todorov, T., Winkler, M.

An overview of the track reconstruction algorithms used in the tracker of the CMS experiment at the LHC is presented. At the LHC, track reconstruction will be a very challenging task due to the high...

Extraction of electric field in heavily irradiated silicon pixel sensors (2006)

Dorokhov, A., Allkofer, Y., Amsler, C., Bortoletto, D., Chiochia, V., Cremaldi, L., ...

A new method for the extraction of the electric field in the bulk of heavily irradiated silicon pixel sensors is presented. It is based on the measurement of the Lorentz deflection and mobility of...

Observation, modeling, and temperature dependence of doubly peaked electric fields in irradiated silicon pixel sensors (2005)

Swartz, M., Chiochia, V., Allkofer, Y., Bortoletto, D., Cremaldi, L., Cucciarelli, S., ...

We show that doubly peaked electric fields are necessary to describe grazing-angle charge collection measurements of irradiated silicon pixel sensors. A model of irradiated silicon based upon two...

Track Reconstruction in the CMS Tracker (2005)

Speer, T, Adam, W, Frühwirth, R, Strandlie, A, Todorov, T, Winkler, M

An overview of the track reconstruction algorithms used in the tracker of the CMS experiment at the LHC is presented. At the LHC, track reconstruction will be a very challenging task due to the high...

A Gaussian-Sum Filter for Vertex Reconstruction (2005)

Frühwirth, R, Speer, T

A vertex reconstruction algorithm was developed based on the Gaussian-sum Filter and implemented in the framework of the CMS reconstruction program. While linear least-square estimators are optimal...

A double junction model of irradiated silicon pixel sensors for LHC (2005)

Chiochia, V., Swartz, M., Allkofer, Y., Bortoletto, D., Cremaldi, L., Cucciarelli, S., ...

In this paper we discuss the measurement of charge collection in irradiated silicon pixel sensors and the comparison with a detailed simulation. The simulation implements a model of radiation damage...

Fluence dependence of charge collection of irradiated pixel sensors (2005)

Rohe, T., Bortoletto, D., Chlochia, V., Cremaldi, L. M., Cucciarelli, S., Dorokhov, A., ...

The barrel region of the CMS pixel detector will be equipped with "n-in-n" type silicon sensors. They are processed on diffusion oxygenated float zone (DOFZ) material, use the moderated...

Simulation of heavily irradiated silicon pixel sensors and comparison with test beam measurements (2005)

Chiochia, V., Swartz, M., Bortoletto, D., Cremaldi, L., Cucciarelli, S., Dorokhov, A., ...

Charge collection measurements performed on heavily irradiated p-spray DOFZ pixel sensors with a grazing angle hadron beam provide a sensitive determination of the electric field within the...

The effect of highly ionising particles on the CMS silicon strip tracker (2005)

Adam, W., Bergauer, T., Friedl, M., Fruehwirth, R., Hrubec, J., Krammer, M., ...

Inelastic nuclear collisions of hadrons incident on silicon sensors can generate secondary highly ionising particles (HIPs) and deposit as much energy within the sensor bulk as several hundred...

The effect of highly ionising particles on the CMS silicon strip tracker (2005)

Adam, W., Bergauer, T., Friedl, M., Fruehwirth, R., Hrubec, J., Krammer, M., ...

Inelastic nuclear collisions of hadrons incident on silicon sensors can generate secondary highly ionising particles (HIPs) and deposit as much energy within the sensor bulk as several hundred...

Simulation of heavily irradiated silicon pixel sensors and comparison with test beam measurements (2005)

Chiochia, V., Swartz, M., Bortoletto, D., Cremaldi, L., Cucciarelli, S., Dorokhov, A., ...

Charge collection measurements performed on heavily irradiated p-spray DOFZ pixel sensors with a grazing angle hadron beam provide a sensitive determination of the electric field within the...

Fluence dependence of charge collection of irradiated pixel sensors (2005)

Rohe, T., Bortoletto, D., Chlochia, V., Cremaldi, L. M., Cucciarelli, S., Dorokhov, A., ...

The barrel region of the CMS pixel detector will be equipped with "n-in-n" type silicon sensors. They are processed on diffusion oxygenated float zone (DOFZ) material, use the moderated p-spray...

Vertex reconstruction in CMS (2005)

Chabanat, E., D'Hondt, J., Estre, N., Frühwirth, R., Prokofiev, K., Speer, T., ...

Due to the high track multiplicity in the final states expected in proton collisions at the LHC experiments, novel vertex reconstruction algorithms are required. The vertex reconstruction problem can...

The effect of highly ionising particles on the CMS silicon strip tracker (2005)

Adam, W., Bergauer, T., Friedl, M., Fruehwirth, R., Hrubec, J., Krammer, M., ...

Inelastic nuclear collisions of hadrons incident on silicon sensors can generate secondary highly ionising particles (HIPs) and deposit as much energy within the sensor bulk as several hundred...

Vertex reconstruction in CMS (2005)

Chabanat, E., D'Hondt, J., Estre, N., Frühwirth, R., Prokofiev, K., Speer, T., ...

Due to the high track multiplicity in the final states expected in proton collisions at the LHC experiments, novel vertex reconstruction algorithms are required. The vertex reconstruction problem can...

The effect of highly ionising particles on the CMS silicon strip tracker (2005)

Adam, W., Bergauer, T., Friedl, M., Fruehwirth, R., Hrubec, J., Krammer, M., ...

Inelastic nuclear collisions of hadrons incident on silicon sensors can generate secondary highly ionising particles (HIPs) and deposit as much energy within the sensor bulk as several hundred...

Extraction of electric field in heavily irradiated silicon pixel sensors (2004)

Dorokhov, A., Allkofer, Y., Amsler, C., Bortoletto, D., Chiochia, V., Cremaldi, L., ...

A new method for the extraction of the electric field in the bulk of heavily irradiated silicon pixel sensors is presented. It is based on the measurement of the Lorentz deflection and mobility of...

Fluence Dependence of Charge Collection of irradiated Pixel Sensors (2004)

Rohe, T, Bortoletto, D, Chiochia, V, Cremaldi, L M, Cucciarelli, S, Dorokhov, A, ...

The barrel region of the CMS pixel detector will be equipped with ``n-in-n'' type silicon sensors. They are processed on DOFZ material, use the moderated p-spray technique and feature a bias grid....

Fluence Dependence of Charge Collection of irradiated Pixel Sensors (2004)

Rohe, T., Bortoletto, D., Chiochia, V., Cremaldi, L. M., Cucciarelli, S., Dorokhov, A., ...

The barrel region of the CMS pixel detector will be equipped with ``n-in-n'' type silicon sensors. They are processed on DOFZ material, use the moderated p-spray technique and feature a bias grid....

Type inversion in irradiated silicon: a half truth (2004)

Swartz, M., Bortoletto, D., Chiochia, V., Cremaldi, L., Cucciarelli, S., Dorokhov, A., ...

Charge collection measurements performed on heavily irradiated p-spray dofz pixel sensors with a grazing angle hadron beam provide a sensitive determination of the electric field within the...

A Gaussian-Sum Filter for Vertex Reconstruction (2004)

Frühwirth, R, Speer, T

A vertex reconstruction algorithm was developed based on the Gaussian-sum filter (GSF) and implemented in the framework of the CMS reconstruction program. While linear least-square estimators are...

Position dependence of charge collection in prototype sensors for the CMS pixel detector (2004)

Rohe, T., Bortoletto, D., Chiochia, V., Cremaldi, L. M., Cucciarelli, S., Dorokhov, A., ...

This paper reports on the sensor R&D activity for the CMS pixel detector. Devices featuring several design and technology options have been irradiated up to a proton fluence(1) of I X 10(15)...

Tests of silicon sensors for the CMS pixel detector (2004)

Dorokhov, A., Amsel, C., Bortoletto, D., Chiochia, V., Cremaldi, L., Cucciarelli, S., ...

The tracking system of the CMS experiment, currently under construction at the Large Hadron Collider (LHC) at CERN (Geneva, Switzerland), will include a silicon pixel detector providing three spacial...

Combination of CDF and D0 results on the W boson mass and width (2004)

Abazov, V. M., Abbott, B., Abdesselam, A., Abolins, M., Abramov, V., Acharya, B. S., ...

The results based on 1992-95 data (Run 1) from the CDF and D0 experiments on the measurements of the W boson mass and width are presented, along with the combined results. We report a Tevatron...

Measurement of the average time-integrated mixing probability of b-flavored hadrons produced at the Fermilab Tevatron (2004)

Acosta, D., Affolder, T., Akimoto, H., Albrow, M. G., Ambrose, D., Amidei, D., ...

We have measured the number of like-sign (LS) and opposite-sign (OS) lepton pairs arising from double semileptonic decays of b and (b) over bar hadrons, pair produced at the Fermilab Tevatron...

Inclusive double-Pomeron exchange at the Fermilab tevatron (p)over-barp collider (2004)

Acosta, D., Affolder, T., Akimoto, H., Albrow, M. G., Ambrose, D., Amidei, D., ...

We report results from a study of events with a double-Pomeron exchange topology produced in (p) over barp collisions at roots=1800 GeV. The events are characterized by a leading antiproton and a...

Search for Kaluza-Klein graviton emission in p(p)over-bar collisions at root s=1.8 TeV using the missing energy signature (2004)

Acosta, D., Affolder, T., Akimoto, H., Albrow, M. G., Ambrose, D., Amidei, D., ...

We report on a search for direct Kaluza-Klein graviton production in a data sample of 84 pb(-1) of p (p) over bar collisions at roots=1.8 TeV, recorded by the Collider Detector at Fermilab. We...

Search for pair production of scalar top quarks in R-parity violating decay modes in p(p)over-bar collisions at root s=1.8 TeV (2004)

Acosta, D., Affolder, T., Akimoto, H., Albrow, M. G., Ambrose, D., Amidei, D., ...

We present the results of a search for pair production of scalar top quarks ((t) over tilde (1)) in an R-parity violating supersymmetry scenario in 106 pb(-1) of p (p) over bar collisions at...

Combination of CDF and D0 results on the W boson mass and width (2004)

M. Abazov, V., Abbott, B., Abdesselam, A., Abolins, M., Abramov, V., S. Acharya, B., ...

The results based on 1992–95 data (Run 1) from the CDF and D0 experiments on the measurements of the W boson mass and width are presented, along with the combined results. We report a Tevatron...

Combination of CDF and D0 results on the W boson mass and width (2004)

M. Abazov, V., Abbott, B., Abdesselam, A., Abolins, M., Abramov, V., S. Acharya, B., ...

The results based on 1992–95 data (Run 1) from the CDF and D0 experiments on the measurements of the W boson mass and width are presented, along with the combined results. We report a Tevatron...

Combination of CDF and D0 results on the W boson mass and width (2004)

Abazov, V.M., Abbott, B., Abdesselam, A., Abolins, M., Abramov, V., S. Acharya, B., ...

The results based on 1992–95 data (Run 1) from the CDF and D0 experiments on the measurements of the W boson mass and width are presented, along with the combined results. We report a Tevatron...

Combination of CDF and D0 results on the W boson mass and width (2004)

Abazov, V.M., Abbott, B., Abdesselam, A., Abolins, M., Abramov, V., S. Acharya, B., ...

The results based on 1992–95 data (Run 1) from the CDF and D0 experiments on the measurements of the W boson mass and width are presented, along with the combined results. We report a Tevatron...

Combination of CDF and D0 results on the W boson mass and width (2004)

Abazov, V.M., Abbott, B., Abdesselam, A., Abolins, M., Abramov, V., S. Acharya, B., ...

The results based on 1992–95 data (Run 1) from the CDF and D0 experiments on the measurements of the W boson mass and width are presented, along with the combined results. We report a Tevatron...

Sensor Development for the CMS Pixel Detector (2003)

Rohe, T, Bortoletto, Daniela, Chiochia, V, Cremaldi, L M, Cucciarelli, S, Dorkhov, A, ...

This paper reports on a current R&D activity for the sensor part of the CMS pixel detector. Devices featuring several design and technology options have been irradiated up to a proton fluence of 1E15...

Sensor Development for the CMS Pixel Detector (2003)

Rohe, T, Bortoletto, Daniela, Chiochia, V, Cremaldi, L M, Cucciarelli, S, Dorkhov, A, ...

This paper reports on a current R&D activity for the sensor part of the CMS pixel detector. Devices featuring several design and technology options have been irradiated up to a proton fluence of 1E15...

Position Dependence of Charge Collection in Prototype Sensors for the CMS Pixel Detector (2003)

Rohe, T., Bortoletto, D., Chiochia, V., Cremaldi, L. M., Cucciarelli, S., Dorokhov, A., ...

This paper reports on the sensor R&D activity for the CMS pixel detector. Devices featuring several design and technology options have been irradiated up to a proton fluencec of 1E15 n_eq/cm**2 at...

The Atlas and CMS trackers (2003)

Speer, T

An overview of the tracking detectors of the ATLAS and CMS experiments at the LHC is presented. The ATLAS tracking system is composed of a pixel detector, a silicon micro-strip tracker and a straw...

Tests of silicon sensors for the CMS pixel detector:: measurements and results (2003)

Dorokhov, A, Amsler, Claude, Bortoletto, Daniela, Chiochia, V, Cremaldi, L M, Cucciarelli, S, ...

The tracking system of the CMS experiment, currently under construction at the Large Hadron Collider (LHC) at CERN (Geneva, Switzerland), will include a silicon pixel detector providing three spacial...

Tests of silicon sensors for the CMS pixel detector (2003)

Dorokhov, A., Amsler, C., Bortoletto, D., Chiochia, V., Cremaldi, L., Cucciarelli, S., ...

The tracking system of the CMS experiment, currently under construction at the Large Hadron Collider (LHC) at CERN (Geneva, Switzerland), will include a silicon pixel detector providing three spacial...

Vertex reconstruction framework and its implementation for CMS (2003)

Boccali, T, Frühwirth, R, Prokofiev, K, Speer, T, Vanlaer, P, Waltenberger, W

The class framework developed for vertex reconstruction in CMS is described. We emphasize how we proceed to develop a flexible, efficient and reliable piece of reconstruction software. We describe...

Vertex reconstruction framework and its implementation for CMS (2003)

Boccali, T, Frühwirth, R, Prokofiev, K, Speer, T, Vanlaer, P, Waltenberger, W

The class framework developed for vertex reconstruction in CMS is described. We emphasize how we proceed to develop a flexible, efficient and reliable piece of reconstruction software. We describe...

Vertex reconstruction framework and its implementation for CMS (2003)

Boccali, T., Fruhwirth, R., Waltenberger, W., Prokofiev, K., Speer, T., Vanlaer, P.

The class framework developed for vertex reconstruction in CMS is described. We emphasize how we proceed to develop a flexible, efficient and reliable piece of reconstruction software. We describe...

New vertex reconstruction algorithms for CMS (2003)

Fruehwirth, R., Waltenberger, W., Prokofiev, K., Speer, T., Vanlaer, P., Chabanat, E., ...

The reconstruction of interaction vertices can be decomposed into a pattern recognition problem (``vertex finding'') and a statistical problem (``vertex fitting''). We briefly review classical...

Momentum distribution of charged particles in jets in dijet events in p(p)over-bar collisions at root s=1.8 TeV and comparisons to perturbative QCD predictions (2003)

Acosta, D., Affolder, T., Akimoto, H., Albrow, M. G., Ambrose, D., Amidei, D., ...

Inclusive momentum distributions of charged particles in restricted cones around jet axes were measured in dijet events with invariant dijet masses in the range 80 to 600 GeV/c(2). Events were...

Search for lepton flavor violating decays of a heavy neutral particle in p(p)over-bar collisions at root s=1.8 TeV (2003)

Acosta, D., Affolder, T., Akimoto, H., Albrow, M. G., Ambrose, D., Amidei, D., ...

We report on a search for a high mass, narrow width particle that decays directly to emu, etau, or mutau. We use approximately 110 pb(-1) of data collected with the Collider Detector at Fermilab from...

Search for the supersymmetric partner of the top quark in dilepton events from p(p)over-bar collisions at root s=1.8 TeV (2003)

Acosta, D., Affolder, T., Akimoto, H., Albrow, M. G., Ambrose, D., Amidei, D., ...

We have searched for pair production of the supersymmetric partner of the top quark (stop) in 107 pb(-1) of p (p) over bar collisions at roots=1.8 TeV collected by the Collider Detector at Fermilab...

Central pseudorapidity gaps in events with a leading antiproton at the Fermilab tevatron (p)over-barp collider (2003)

Acosta, D., Affolder, T., Akimoto, H., Albrow, M. G., Ambrose, D., Amidei, D., ...

We report a measurement of the fraction of events with a large pseudorapidity gap Deltaeta within the pseudorapidity region available to the proton dissociation products X in (p) over bar +p-->(p)...

Search for associated production of Upsilon and vector boson in p(p)over-bar collisions at root(s)over-bar=1.8 TeV (2003)

Acosta, D., Affolder, T., Akimoto, H., Albrow, M. G., Ambrose, D., Amidei, D., ...

We present a search for associated production of the Y(1S) and a vector boson in 83 pb(-1) of p (p) over bar collisions at roots=1.8 TeV collected by the CDF experiment in 1994-1995. We find no...

Search for long-lived charged massive particles in p(p)over-bar collision at root s=1.8 TeV (2003)

Acosta, D., Affolder, T., Akimoto, H., Albrow, M. G., Ambrose, D., Amidei, D., ...

We report a search for the production of long-lived charged massive particles in a data sample of 90 pb(-1) of roots = 1.8 TeV p (p) over bar collisions recorded by the Collider Detector at Fermilab....

Search for a W-' boson decaying to a top and bottom quark pair in 1.8 TeV p(p)over-bar collisions (2003)

Acosta, D., Affolder, T., Akimoto, H., Albrow, M. G., Ambrose, D., Amidei, D., ...

We report the results of a search for a W-' boson produced in p (p) over bar collisions at a center-of-mass energy of 1.8 TeV using a 106 pb(-1) data sample recorded by the Collider Detector at...

The CDF-II Online Silicon Vertex Tracker (2001)

Bardi, A., Belloni, A., Carosi, R., Cerri, A., Chlachidze, G., Dell'Orso, M., ...

The Online Silicon Vertex Tracker is the new CDF-II level 2 trigger processor designed to reconstruct 2-D tracks within the Silicon Vertex Detector with high speed and accuracy. By performing a...