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Thome, Erik
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Publications (10 of 15) Show all publications
Moeini, H., Caldeira Balkeståhl, L., Calén, H., Fransson, K., Johansson, T., Kupsc, A., . . . Zmeskal, J. (2013). Design Studies of the PWO Forward End-cap Calorimeter for PANDA. European Physical Journal A, A49, 138
Open this publication in new window or tab >>Design Studies of the PWO Forward End-cap Calorimeter for PANDA
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2013 (English)In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. A49, p. 138-Article in journal (Refereed) Published
Abstract [en]

The PANDA detection system at FAIR, Germany, is designed to study antiproton-proton annihilations, in order to investigate among others the realm of charm-meson states and glueballs, which has still much to reveal. The yet unknown properties of this field are to be unraveled through studying QCD phenomena in the non-perturbative regime. The multipurpose PANDA detector will be capable of tracking, calorimetry, and particle identification, and is foreseen to run at high luminosities providing average reaction rates up to 20 Million interactions/s. The envisaged physics program requires measurements of photons and charged particles with excellent energy, position, and time resolutions. The electromagnetic calorimeter (EMC) will serve as one of the basic components of the detector setup and comprises cooled Lead-Tungstate (PbWO4) crystals. This paper presents the mechanical design of the Forward End-cap calorimeter and analyses the response of this detector component in conjunction with the full EMC and the complete PANDA detector. The simulation studies are focused on the performance of the planned EMC with respect to the energy and spatial resolution of the reconstructed photons. Results of the Monte Carlo simulations, excluding very low-energy photons, have been validated by data obtained from a prototype calorimeter and shown to fulfil the requirements imposed by the PANDA physics program.

National Category
Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-287233 (URN)10.1140/epja/i2013-13138-0 (DOI)
Note

PANDA Collaboration, for complete list of authors see http://dx.doi.org/10.1103/10.1140/epja/i2013-13025-8

Available from: 2016-04-22 Created: 2016-04-22 Last updated: 2017-11-30
Destefanis, M., Caldeira Balkeståhl, L., Calén, H., Fransson, K., Johansson, T., Kupsc, A., . . . Zmeskal, J. (2013). Drell-Yan studies in ppbar reactions at FAIR. Paper presented at 20th International Symposium on Spin Physics (SPIN 2012), 17-22 Sept 2012, Dubna, Russia. Physics of particles and nuclei, 44, 886-889
Open this publication in new window or tab >>Drell-Yan studies in ppbar reactions at FAIR
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2013 (English)In: Physics of particles and nuclei, ISSN 1063-7796, E-ISSN 1090-6495, Vol. 44, p. 886-889Article in journal (Refereed) Published
Abstract [en]

The nucleonic structure is far to be completely understood. A transverse momentum dependent description of the nucleon structure is a crucial mile stone for several forthcoming studies in a wide range of experimental scenarios. By mean of antiproton beams, eventually polarized, that will be available at the future FAIR facility with a beam momentum up to 15 GeV/ c , the nonperturbative region of the QCD could be accessed. One of the main goal of the forthcoming expe riments at FAIR is the investigation of those Drell– Yan lepton pairs produced in protonantiproton annihila tions, taking advantage of the high expected lumi nosities. Drell–Yan studies are a unique tool to acce ss the spin depending properties of the nucleon, and namely its transverse degrees of freedom. Transver se Momentum Dependent (TMD) Parton Distribution Functions (PDFs), in particular the Boer–Mulders, the Sivers and the Transversity distribution functions, could be widely investigated by mean of the correspon ding experimental azimuthal asymmetries. In later stages of FAIR, single and doublespin asymmetries could be investigated as well. The Drell–Yan physics program which could be accessed at FAIR will be discussed in details, with a particular focus on the PANDA experimental scenario

National Category
Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-287221 (URN)10.1134/S1063779613060063 (DOI)
Conference
20th International Symposium on Spin Physics (SPIN 2012), 17-22 Sept 2012, Dubna, Russia
Note

PANDA Collaboration, for complete list of authors see http://dx.doi.org/10.1103/10.1140/epja/i2013-13025-8

Available from: 2016-04-22 Created: 2016-04-22 Last updated: 2017-11-30
Mochalov, V., Caldeira Balkeståhl, L., Calén, H., Fransson, K., Johansson, T., Kupsc, A., . . . Zmeskal, J. (2013). Physics with antiprotons at PANDA. Paper presented at 7th Joint International Hadron Structure'13 Conference (HS 13), 30 Jun - 4 Jul, 2013, Tatranské Matliare, Slovakia. Nuclear physics B, Proceedings supplements, 245, 124-131
Open this publication in new window or tab >>Physics with antiprotons at PANDA
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2013 (English)In: Nuclear physics B, Proceedings supplements, ISSN 0920-5632, E-ISSN 1873-3832, Vol. 245, p. 124-131Article in journal (Refereed) Published
Abstract [en]

The PANDA collaboration (anti-Proton ANnihilations at DArmstadt) is a next generation hadron physics experiment to be operated at the future Facility for Antiproton and Ion Research (FAIR) at Darmstadt, Germany. It will use intensive cooled antiproton beams with a momentum between 1.5 GeV/c and 15 GeV/c. The PANDA detector is a state-of-the-art internal target detector allowing the detection and identification of neutral and charged particles almost in the whole solid angle.

National Category
Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-287217 (URN)10.1016/j.nuclphysbps.2013.10.023 (DOI)
Conference
7th Joint International Hadron Structure'13 Conference (HS 13), 30 Jun - 4 Jul, 2013, Tatranské Matliare, Slovakia
Note

PANDA Collaboration, for complete list of authors see http://dx.doi.org/10.1103/10.1140/epja/i2013-13025-8

Available from: 2016-04-22 Created: 2016-04-22 Last updated: 2017-11-30
Maggiora, M., Caldeira Balkeståhl, L., Calén, H., Fransson, K., Johansson, T., Kupsc, A., . . . Zmeskal, J. (2013). Proton time-like form factors at PANDA. Paper presented at 11th Conference on the Intersections of Particle and Nuclear Physics (CIPANP 2012), 29 May - 2 Jun, 2012, St. Petersburg, USA. AIP Conference Proceedings, 1560, 588-590
Open this publication in new window or tab >>Proton time-like form factors at PANDA
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2013 (English)In: AIP Conference Proceedings, ISSN 0094-243X, E-ISSN 1551-7616, Vol. 1560, p. 588-590Article in journal (Refereed) Published
Abstract [en]

A global description of the nucleonstructure in the complete kinematic region is needed. The ̄PANDA experimental scenario at FAIR could allow for an independent evaluation of the proton Time-Like Form Factors and for the investigation of an unprecedented large q2 range in order to probe their asymptotic behaviour. The sensitivity to higher order contributions to Born approximation is discussed as well.

National Category
Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-287185 (URN)10.1063/1.4826848 (DOI)
Conference
11th Conference on the Intersections of Particle and Nuclear Physics (CIPANP 2012), 29 May - 2 Jun, 2012, St. Petersburg, USA
Note

PANDA Collaboration, for complete list of authors see http://dx.doi.org/10.1103/10.1140/epja/i2013-13025-8

Available from: 2016-04-22 Created: 2016-04-22 Last updated: 2017-11-30
Erni, W., Keshelashvili, I., Krusche, B., Steinacher, M., Heng, Y., Liu, Z., . . . Zmeskal, J. (2013). Technical design report for the PANDA (AntiProton Annihilations at Darmstadt) Straw Tube Tracker. European Physical Journal A, 49(2), 25
Open this publication in new window or tab >>Technical design report for the PANDA (AntiProton Annihilations at Darmstadt) Straw Tube Tracker
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2013 (English)In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 49, no 2, p. 25-Article in journal (Refereed) Published
Abstract [en]

This document describes the technical layout and the expected performance of the Straw Tube Tracker (STT), the main tracking detector of the PANDA target spectrometer. The STT encloses a Micro-Vertex-Detector (MVD) for the inner tracking and is followed in beam direction by a set of GEM stations. The tasks of the STT are the measurement of the particle momentum from the reconstructed trajectory and the measurement of the specific energy loss for a particle identification. Dedicated simulations with full analysis studies of certain proton-antiproton reactions, identified as being benchmark tests for the whole PANDA scientific program, have been performed to test the STT layout and performance. The results are presented, and the time lines to construct the STT are described.

National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:uu:diva-198055 (URN)10.1140/epja/i2013-13025-8 (DOI)000315601600009 ()
Note

PANDA Collaboration, for complete list of authors see http://dx.doi.org/10.1103/10.1140/epja/i2013-13025-8

Available from: 2013-04-09 Created: 2013-04-08 Last updated: 2017-12-06Bibliographically approved
Destefanis, M., Caldeira Balkeståhl, L., Calén, H., Fransson, K., Johansson, T., Kupsc, A., . . . Zmeskal, J. (2013). The PANDA experiment at FAIR. Paper presented at 7th Joint International Hadron Structure'13 Conference (HS 13), 30 Jun - 4 Jul, 2013, Tatranské Matliare, Slovakia. Nuclear physics B, Proceedings supplements, 245, 199-206
Open this publication in new window or tab >>The PANDA experiment at FAIR
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2013 (English)In: Nuclear physics B, Proceedings supplements, ISSN 0920-5632, E-ISSN 1873-3832, Vol. 245, p. 199-206Article in journal (Refereed) Published
Abstract [en]

The PANDA (antiProton ANnihilation at DArmstadt) experiment is one of the major projects in preparation at the upcoming FAIR facility in Darmstadt, Germany. It will study interactions between antiprotons and protons or nuclei in the momentum range from 1.5 GeV/c to 15 GeV/c. The PANDA scientific program will address a wide range of topics, all aiming at improving our understanding of the strong interaction and hadron structure. The PANDA detector is a general-purpose spectrometer that will collect high quality and high statistics data in the fields of meson spectroscopy, baryon-antibaryon production, baryon spectroscopy, hypernuclear physics, hadron properties in the nuclear medium, and nucleon structure. This paper reviews some of the main physics topics of the experiment, together with a presentation of the detector.

National Category
Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-287195 (URN)10.1016/j.nuclphysbps.2013.10.040 (DOI)
Conference
7th Joint International Hadron Structure'13 Conference (HS 13), 30 Jun - 4 Jul, 2013, Tatranské Matliare, Slovakia
Note

PANDA Collaboration, for complete list of authors see http://dx.doi.org/10.1103/10.1140/epja/i2013-13025-8

Available from: 2016-04-22 Created: 2016-04-22 Last updated: 2017-11-30
Calvo, D., Caldeira Balkeståhl, L., Calén, H., Fransson, K., Johansson, T., Kupsc, A., . . . Zmeskal, J. (2013). The silicon Micro Vertex Detector of the PANDA$ experiment. Paper presented at 12th Pisa Meeting on Advanced Detectors : Frontier Detector for Frontier Physics, 20-26 May 2012, La Biodola, Isola d'Elba, Italy. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, A718, 39-42
Open this publication in new window or tab >>The silicon Micro Vertex Detector of the PANDA$ experiment
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2013 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. A718, p. 39-42Article in journal (Refereed) Published
Abstract [en]

The PANDA experiment will make use of cooled antiproton beams of unprecedented quality that will become available at the Facility for Antiproton and Ion Research in Darmstadt, featuring a 1.5-15GeV/c momentum range. The physics program includes measurements of hyperons produced at low energies, spectroscopy of charmonium and open-charm mesons. To handle the forward peaked particle distribution due to the Lorentz boost, the apparatus is arranged in an asymmetric layout around the interaction point. In particular the Micro Vertex Detector based on silicon devices will have a rather unusual geometry. The MVD features fast data readout, since the experiment is triggerless, particle identification over the full range of energies, limited material budget and good spatial and time resolution. The status of the MVD design is shown and the present prototypes are described.

National Category
Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-287230 (URN)10.1016/j.nima.2012.08.093 (DOI)
Conference
12th Pisa Meeting on Advanced Detectors : Frontier Detector for Frontier Physics, 20-26 May 2012, La Biodola, Isola d'Elba, Italy
Note

PANDA Collaboration, for complete list of authors see http://dx.doi.org/10.1103/10.1140/epja/i2013-13025-8

Available from: 2016-04-22 Created: 2016-04-22 Last updated: 2017-11-30
Kavatsyuk, M., Caldeira Balkeståhl, L., Calén, H., Fransson, K., Johansson, T., Kupsc, A., . . . Zmeskal, J. (2013). Trigger-less readout system with pulse pile-up recovery for the PANDA electromagnetic calorimeter. Paper presented at 12th Pisa Meeting on Advanced Detectors : Frontier Detector for Frontier Physics, 20-26 May 2012, La Biodola, Isola d'Elba, Italy. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, A718, 217-219
Open this publication in new window or tab >>Trigger-less readout system with pulse pile-up recovery for the PANDA electromagnetic calorimeter
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2013 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. A718, p. 217-219Article in journal (Refereed) Published
Abstract [en]

A simple, efficient, and robust on-line data-processing scheme was developed for the digital front-end electronics of the electromagnetic calorimeter of the PANDA spectrometer at FAIR, Darmstadt. The implementation of the processing algorithm in FPGA enables the construction of an almost dead-time free data acquisition system. The prototype of a complete trigger-less readout chain has been developed and evaluated. The precision of time synchronisation commands has been verified. A pile-up recovery algorithm was developed and evaluated over a large dynamic range of signal amplitudes.

National Category
Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-287225 (URN)10.1016/j.nima.2012.10.007 (DOI)
Conference
12th Pisa Meeting on Advanced Detectors : Frontier Detector for Frontier Physics, 20-26 May 2012, La Biodola, Isola d'Elba, Italy
Note

PANDA Collaboration, for complete list of authors see http://dx.doi.org/10.1103/10.1140/epja/i2013-13025-8

Available from: 2016-04-22 Created: 2016-04-22 Last updated: 2017-11-30
Thomé, E. (2012). Multi-Strange and Charmed Antihyperon-Hyperon Physics for PANDA. (Doctoral dissertation). Uppsala: Acta Universitatis Upsaliensis
Open this publication in new window or tab >>Multi-Strange and Charmed Antihyperon-Hyperon Physics for PANDA
2012 (English)Doctoral thesis, monograph (Other academic)
Abstract [en]

The prospects of studying multi-strange and charmed antihyperon-hyperon physics and CP violation in hyperon decays in the upcoming PANDA experiment at FAIR, Germany, have been studied in this thesis.

The angular dependence on polarisation parameters in the decay of the spin 3/2 Omega hyperon was calculated using the density matrix formalism. Expressions for the angular distributions in the Ω -> ΛK and the subsequent Λ -> pπ decays were derived.

Simulations were performed for the pbar p -> Ξ+ Ξ-, pbar p -> Ω+Ω- and pbar p -> Λc-Λc+ reactions. Special attention was given to the reconstruction of spin variables. It is shown that PANDA will register tens of events per second for the pbar p -> Ξ+Ξ- reaction. This should be compared to the previously existing data of a handfull of events. For the other two reactions the event rates will be lower, but still reasonably high. This will be the first measurements of these reactions. It is shown that spin variables can be reconstructed in all three reactions for all production angles of the hyperons. Simulations concerning the possibility to measure CP violation parameters in hyperon decays were also made for the reactions pbar p- > Λbar Λ and pbar p -> Ξ+Ξ-. It was found that false signals from detector asymmetries disappears if no particle identification criterium is used and the analysis is restricted to events were the hyperon decays occur close to the beam axis.

The effect of the magnetic field in the PANDA detector on the measurement of hyperon spin variables was investigated for the case of pbar p -> Λbar Λ. The effect was observed to be small for polarisation and negligible for spin correlations.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2012. p. 154
Series
Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1104-2516 ; 101
Keywords
PANDA, FAIR, antiproton, hyperon, strangeness, charm, polarisation, spin correlation, CP violation
National Category
Subatomic Physics
Research subject
Nuclear Physics
Identifiers
urn:nbn:se:uu:diva-182450 (URN)978-91-554-8497-2 (ISBN)
Public defence
2012-11-23, Häggsalen, Ångströmlaboratoriet, Lägerhyddsvägen 1, Uppsala, 10:15 (English)
Opponent
Supervisors
Available from: 2012-11-02 Created: 2012-10-10 Last updated: 2013-01-23Bibliographically approved
Bersani, A., Caldeira Balkeståhl, L., Calén, H., Fransson, K., Johansson, T., Kupsc, A., . . . Zlomanczuk, J. (2012). The PANDA detector at FAIR. Physica scripta. T, T150, 014006
Open this publication in new window or tab >>The PANDA detector at FAIR
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2012 (English)In: Physica scripta. T, ISSN 0281-1847, Vol. T150, p. 014006-Article in journal (Refereed) Published
Abstract [en]

The PANDA detector will be installed at FAIR to enterprise a long-term, wide-spectrum physics program in the strong interaction framework. The detector will be installed at the HESR accumulation ring, which will provide an anti-proton beam of unprecedented luminosity and momentum definition. The beam will interact with an internal target. The detector has been designed to allow a 4π coverage around the interaction region. Due to the relatively high energy of the beam, up to 15 GeV, PANDA will feature two magnetic spectrometers: the target spectrometer (TS), with a superconducting solenoid and covering the interaction region, and a forward spectrometer (FS), with a normal-conducting dipole and covering the small angles region. Since the physics program is wide and the requirements on the various subsystems are different, the detector has been designed to be as flexible as possible. The complete detector will be described in detail, both from the viewpoint of the proposed techniques and from the viewpoint of the expected performances. An overview of the status of various components of the detector will be presented, too.

Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2012
Keywords
PANDA, design, target, magnetic spectrometer, acceptance, performance
National Category
Subatomic Physics
Research subject
Nuclear Physics
Identifiers
urn:nbn:se:uu:diva-196989 (URN)10.1088/0031-8949/2012/T150/014006 (DOI)
Available from: 2013-03-15 Created: 2013-03-15 Last updated: 2017-12-06Bibliographically approved
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