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PANDA Collaboration,
W. Erni,
I. Keshelashvili,
B. Krusche,
M. Steinacher,
Y. Heng,
Z. Liu,
H. Liu,
X. Shen,
Q. Wang, [......],
S. Wronka,
A. Wysocka,
B. Zwieglinski,
P. Bühler,
O. Hartman,
P. Kienle,
J. Marton,
K. Suzuki,
E. Widmann,
J. Zmeskal
[show abstract]
[hide abstract]
ABSTRACT: 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.
European Physical Journal A 02/2013; 49(25):1-104. · 2.19 Impact Factor
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PANDA Collaboration,
W. Erni,
I. Keshelashvili,
B. Krusche,
M. Steinacher,
Y. Heng,
Z. Liu,
H. Liu,
X. Shen,
Q. Wang, [......],
M. Plominski,
J. Szewinski,
K. Traczyk,
B. Zwieglinski,
P. Bühler,
A. Gruber,
P. Kienle,
J. Marton,
E. Widmann,
J. Zmeskal
[show abstract]
[hide abstract]
ABSTRACT: This document illustrates the technical layout and the expected performance
of the Micro Vertex Detector (MVD) of the PANDA experiment. The MVD will detect
charged particles as close as possible to the interaction zone. Design criteria
and the optimisation process as well as the technical solutions chosen are
discussed and the results of this process are subjected to extensive Monte
Carlo physics studies. The route towards realisation of the detector is
outlined.
07/2012;
-
C. Curceanu (Petrascu,
S. Bartalucci,
S. Bertolucci, M. Bragadireanu,
M. Cargnelli,
S. Di Matteo,
J.-P. Egger,
C. Guaraldo,
M. Iliescu,
T. Ishiwatari, [......],
E. Milotti,
D. Pietreanu,
T. Ponta,
A. Romero Vidal,
D. L. Sirghi,
F. Sirghi,
L. Sperandio,
O. Vazquez Doce,
E. Widmann,
J. Zmeskal
[show abstract]
[hide abstract]
ABSTRACT: We present an experimental test of the validity of the Pauli Exclusion Principle for electrons based on the concept put forward
a few years ago by Ramberg and Snow (Ramberg and Snow in Phys. Lett. B 238:438, 1990). In this experiment we perform a very accurate search of X-rays from the Pauli-forbidden atomic transitions of electrons
in the already filled 1S shells of copper atoms. Although the experiment has a simple structure, it poses deep conceptual
and interpretational problems. Here we describe the experimental method and recent experimental results, which we interpret
as an upper limit for the probability to violate the Pauli Exclusion Principle. We present also future plans to upgrade the
experimental apparatus using Silicon Drift Detectors.
Spin-statistics–Violation of the Pauli Exclusion Principle–Atomic(forbidden) transitions–X-ray detectors
Foundations of Physics 05/2012; 41(3):282-287. · 1.05 Impact Factor
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J Marton,
S Bartalucci,
S Bertolucci, M Bragadireanu,
M Cargnelli,
C Curceanu (Petrascu,
S Di Matteo,
J -P Egger,
C Guaraldo,
M Iliescu, [......],
A Rizzo,
A Romero Vidal,
E Sbardella,
A Scordo,
D L Sirghi,
F Sirghi,
L Sperandio,
O Vazquez Doce,
E Widmann,
J Zmeskal
[show abstract]
[hide abstract]
ABSTRACT: The Pauli Principle represents one of the most important rules in physics and explains numerous phenomena as well as characteristic properties of matter, like its stability. Testing the validity of this principle at the highest possible sensitivity is a challenging experimental task - the VIP experiment at the Gran Sasso underground laboratory aims at a limit for the violation probability of the order of 10−29 to 10−30. The method is based on the search for Pauli-forbidden x-ray transitions in a pure copper conductor using silicon x-ray detectors with high resolution in energy. The experimental setup, results obtained so far and new ideas to further enhance the sensitivity will be presented.
Journal of Physics Conference Series 12/2011; 335(1):012060.
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C Curceanu Petrascu,
S Bartalucci,
S Bertolucci, M Bragadireanu,
M Cargnelli,
S Di Matteo,
J -P Egger,
C Guaraldo,
M Iliescu,
T Ishiwatari, [......],
T Ponta,
A Rizzo,
A Romero Vidal,
A Scordo,
D L Sirghi,
F Sirghi,
L Sperandio,
O Vazquez Doce,
E Widmann,
J Zmeskal
[show abstract]
[hide abstract]
ABSTRACT: The Pauli exclusion principle (PEP), consequence of the spin-statistics connection, is one of the basic principles of the modern physics. Being at the very basis of our understanding of matter, as many other fundamental principles it spurs a lively debate on its possible limits, deeply rooted in the very foundations of Quantum Field Theory. Therefore, it is extremely important to test the limits of its validity. Quon theory provides a suitable mathematical framework of possible violation of PEP, where the violation parameter q translates into a probability of violating PEP. The VIP (VIolation of the Pauli exclusion principle) experiment established a new limit on the probability that PEP is violated by electrons, using the method of searching for PEP forbidden atomic transitions in copper. We describe the experimental method, the obtained results, both in terms of the q-parameter from quon theory and as probability of PEP violation, we briefly discuss them and present future plans to go beyond the actual limit by upgrading the experimental setup. We also shortly mention the possibility of using a similar experimental technique to search for eventual X-rays, generated in the spontaneous collapse models in quantum mechanics.
Journal of Physics Conference Series 07/2011; 306(1):012036.
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Vazquez Doce O,
J. Zmeskal,
M. Bazzi, M. Bragadireanu,
P. Buhler,
M. Cargnelli,
C. Curceanu,
F. Ghio,
C Guaraldo,
M. Iliescu, [......],
S Okada,
D. Pietreanu,
Poli Lener M,
A. Rizzo,
Romero Vidal A,
A. Scordo,
D. Sirghi,
A. d’Ufizzi,
E. Widmann,
B. Wunschek
[show abstract]
[hide abstract]
ABSTRACT: A preliminar study of these kind of hadronic interactions is being done by the AMADEUS collaboration by analyzing the existent KLOE data.
EPJ Web of Conferences. 01/2010;
-
S. Ajimura,
G Beer,
H. Bhang, M. Bragadireanu,
P. Buehler,
L Busso,
M. Cargnelli,
S Choi,
C. Curceanu,
S Enomoto, [......],
T Suzuki,
H. Tatsuno,
M Tokuda,
D. Tomono,
A Toyoda,
K Tsukada,
E. Widmann,
T Yamazaki,
H Yim,
J. Zmeskal
[show abstract]
[hide abstract]
ABSTRACT: The J-PARC E15 experiment will be performed to search for the simplest kaonic nuclear bound state, K− pp, by the in-flight 3He(K−,n) reaction. The exclusive measurement can be performed by a simultaneous measurement of the missing mass using the primary neutron and the invariant mass via the expected decay, K− pp → Λp → pπ− p. In this report, an overview of the experiment and the preparation status are presented.
EPJ Web of Conferences. 01/2010;
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The PANDA Collaboration,
W. Erni,
I. Keshelashvili,
B. Krusche,
M. Steinacher,
Y. Heng,
Z Liu,
H Liu,
X Shen,
O. Wang, [......],
M. Plominski,
J. Szewinski,
K. Traczyk,
B. Zwieglinski,
P. Buehler,
A Gruber,
P. Kienle,
J. Marton,
E. Widmann,
J. Zmeskal
[show abstract]
[hide abstract]
ABSTRACT: This document is the Technical Design Report covering the two large spectrometer magnets of the PANDA detector set-up. It shows the conceptual design of the magnets and their anticipated performance. It precedes the tender and procurement of the magnets and, hence, is subject to possible modifications arising during this process. Comment: 10 pages, 14MB, accepted by FAIR STI in May 2009, editors: Inti Lehmann (chair), Andrea Bersani, Yuri Lobanov, Jost Luehning, Jerzy Smyrski, Technical Coordiantor: Lars Schmitt, Bernd Lewandowski (deputy), Spokespersons: Ulrich Wiedner, Paola Gianotti (deputy)
PANDA Collaboration. 07/2009;
-
The PANDA Collaboration: W. Erni,
I. Keshelashvili,
B. Krusche,
M. Steinacher,
Y. Heng,
Z. Liu,
H. Liu,
X. Shen,
O. Wang,
H. Xu, [......],
M. Plominski,
J. Szewinski,
K. Traczyk,
B. Zwieglinski,
P. Buehler,
A. Gruber,
P. Kienle,
J. Marton,
E. Widmann,
J. Zmeskal
[show abstract]
[hide abstract]
ABSTRACT: This document is the Technical Design Report covering the two large
spectrometer magnets of the PANDA detector set-up. It shows the
conceptual design of the magnets and their anticipated performance. It
precedes the tender and procurement of the magnets and, hence, is
subject to possible modifications arising during this process.
06/2009;
-
PANDA Collaboration,
W. Erni,
I. Keshelashvili,
B. Krusche,
M. Steinacher,
Y. Heng,
Z Liu,
H Liu,
X Shen,
O. Wang, [......],
P. Buehler,
A Gruber,
P. Kienle,
J. Marton,
E. Widmann,
J. Zmeskal,
M. F. M. Lutz,
B. Pire,
O. Scholten,
R. Timmermans
[show abstract]
[hide abstract]
ABSTRACT: To study fundamental questions of hadron and nuclear physics in interactions of antiprotons with nucleons and nuclei, the universal PANDA detector will be built. Gluonic excitations, the physics of strange and charm quarks and nucleon structure studies will be performed with unprecedented accuracy thereby allowing high-precision tests of the strong interaction. The proposed PANDA detector is a state-of-the art internal target detector at the HESR at FAIR allowing the detection and identification of neutral and charged particles generated within the relevant angular and energy range. This report presents a summary of the physics accessible at PANDA and what performance can be expected. Comment: 216 pages
03/2009;
-
PANDA Collaboration,
W. Erni,
I. Keshelashvili,
B. Krusche,
M. Steinacher,
Y. Heng,
Z Liu,
H Liu,
X Shen,
O. Wang, [......],
M. Plominski,
J. Szewinski,
K. Traczyk,
B. Zwieglinski,
P. Buehler,
A Gruber,
P. Kienle,
J. Marton,
E. Widmann,
J. Zmeskal
[show abstract]
[hide abstract]
ABSTRACT: This document presents the technical layout and the envisaged performance of the Electromagnetic Calorimeter (EMC) for the PANDA target spectrometer. The EMC has been designed to meet the physics goals of the PANDA experiment, which is being developed for the Facility for Antiproton and Ion Research (FAIR) at Darmstadt, Germany. The performance figures are based on extensive prototype tests and radiation hardness studies. The document shows that the EMC is ready for construction up to the front-end electronics interface. Comment: 199 pages, submitted to FAIR STI on July 1st 2008, Editors: Fritz-Herbert Heinsius, Bertram Kopf, Bernd Lewandowski (Deputy Technical Coordinator), Herbert L\"ohner, Rainer Novotny (Project Coordinator), Klaus Peters, Philippe Rosier, Lars Schmitt (Technical Coordinator), Alexander Vasiliev; Spokespersons: Ulrich Wiedner, Paola Gianotti (deputy)
10/2008;
-
C. Curceanu (Petrascu,
S. Bartalucci,
S. Bertolucci, M. Bragadireanu,
M. Cargnelli,
M. Catitti,
S. Di Matteo,
J. -P. Egger,
C Guaraldo,
M. Iliescu, [......],
J. Marton,
E. Milotti,
D. Pietreanu,
T. Ponta,
D. L. Sirghi,
F. Sirghi,
L. Sperandio,
O. Vazquez Doce,
E. Widmann,
J. Zmeskal
[show abstract]
[hide abstract]
ABSTRACT: The Pauli Exclusion Principle is one of the basic principles of modern physics and is at the very basis of our understanding of matter: thus it is fundamental importance to test the limits of its validity. Here we present the VIP (Violation of the Pauli Exclusion Principle) experiment, where we search for anomalous X-rays emitted by copper atoms in a conductor: any detection of these anomalous X-rays would mark a Pauli-forbidden transition. ] VIP is currently taking data at the Gran Sasso underground laboratories, and its scientific goal is to improve by at least four orders of magnitude the previous limit on the probability of Pauli violating transitions, bringing it into the 10**-29 - 10**-30 region. First experimental results, together with future plans, are presented.
04/2008;
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S Bartalucci,
S Bertolucci, M Bragadireanu,
M Cargnelli,
M Catitti,
Curceanu C Petrascu,
S Di Matteo,
J -P Egger,
C Guaraldo,
M Iliescu, [......],
M Laubenstein,
J Marton,
E Milotti,
D Pietreanu,
T Ponta,
D L Sirghi,
F Sirghi,
L Sperandio,
E Widmann,
J Zmeskal
[show abstract]
[hide abstract]
ABSTRACT: The Pauli Exclusion Principle (PEP) represents one of the fundamental principles of the modern physics and our comprehension of the surrounding matter is based on it. Even if today there are no compelling reasons to doubt its validity, it still spurs a lively debate on its limits, as testified by the abundant contributions found in the literature and in topical conferences. We present a method of searching for possible small violations of PEP for electrons, through the search for anomalous X-ray transitions in copper atoms, produced by fresh electrons which can decay in a Pauli- forbidden transition to the 1s level, already occupied by two electrons. The VIP Experiment has the scientific goal to improve by four orders of magnitude the present limit on the probability of PEP violation for electrons, bringing it into the 10(-30)-10(-31) region. Preliminary results, together with future plans, are presented.
International Journal of Quantum Information 01/2007; 5(1-2):299-304. · 0.67 Impact Factor
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L. Sperandio,
S. Bartalucci,
S. Bertolucci, M. Bragadireanu,
M. Cargnelli,
M. Catitti,
S. Di Matteo,
J.-P. Egger,
C. Guaraldo,
M. Iliescu,
T. Ishiwatari,
M. Laubenstein
Il Nuovo Cimento B. 01/2007; 122:641-647.
-
S. Bartalucci,
S. Bertolucci, M. Bragadireanu,
M. Cargnelli,
M. Catitti,
C. Curceanu,
S. Di Matteo,
J. -P. Egger,
C Guaraldo,
M. Iliescu, [......],
J. Marton,
E. Milotti,
D. Pietreanu,
T. Ponta,
D. L. Sirghi,
F. Sirghi,
L. Sperandio,
O. Vazquez Doce,
E. Widmann,
J. Zmeskal
[show abstract]
[hide abstract]
ABSTRACT: The Pauli exclusion principle (PEP) represents one of the basic principles of modern physics and, even if there are no compelling reasons to doubt its validity, it still spurs a lively debate, because an intuitive, elementary explanation is still missing, and because of its unique stand among the basic symmetries of physics. A new limit on the probability that PEP is violated by electrons was estabilished by the VIP (VIolation of the Pauli exclusion principle) Collaboration, using the method of searching for PEP forbidden atomic transitions in copper. The preliminary value, ${1/2}\beta^{2} \textless 4.5\times 10^{-28}$, represents an improvement of about two orders of magnitude of the previous limit. The goal of VIP is to push this limit at the level of $10^{-30}$. Comment: submitted to Journal of Physics: Conference Series, by the Institute of Physics
12/2006;
-
S. Bartalucci,
S. Bertolucci, M. Bragadireanu,
M. Cargnelli,
M. Catitti,
C. Curceanu,
S. Di Matteo,
J. -P. Egger,
C Guaraldo,
M. Iliescu, [......],
M. Laubenstein,
J. Marton,
E. Milotti,
D. Pietreanu,
T. Ponta,
D. L. Sirghi,
F. Sirghi,
L. Sperandio,
E. Widmann,
J. Zmeskal
[show abstract]
[hide abstract]
ABSTRACT: The Pauli Exclusion Principle is a basic principle of Quantum Mechanics, and its validity has never been seriously challenged. However, given its fundamental standing, it is very important to check it as thoroughly as possible. Here we describe the VIP (VIolation of the Pauli exclusion principle) experiment, an improved version of the Ramberg and Snow experiment (E. Ramberg and G. Snow, {\it Phys. Lett. B} {\bf 238}, 438 (1990)); VIP has just completed the installation at the Gran Sasso underground laboratory, and aims to test the Pauli Exclusion Principle for electrons with unprecedented accuracy, down to $\beta^2/2 \approx 10^{-30} - 10^{-31}$. We report preliminary experimental results and briefly discuss some of the implications of a possible violation.
09/2006;
-
S. Bartalucci,
S. Bertolucci, M. Bragadireanu,
C. Bucci,
M. Cargnelli,
M. Catitti,
C. Curceanu,
S. Di Matteo,
J. -P. Egger,
N. Ferrari, [......],
M. Laubenstein,
J. Marton,
E. Milotti,
D. Pietreanu,
T. Ponta,
D. Sirghi,
F. Sirghi,
L. Sperandio,
E. Widmann,
J. Zmeskal
[show abstract]
[hide abstract]
ABSTRACT: The Pauli Exclusion Principle (PEP) is a basic principle of Quantum Mechanics, and its validity has never been seriously challenged. However, given its importance, it is very important to check it as thoroughly as possible. Here we describe the VIP (Violation of PEP) experiment, an improved version of the Ramberg and Snow experiment (Ramberg and Snow, Phys. Lett. B238 (1990) 438); VIP shall be performed at the Gran Sasso underground laboratories, and aims to test the Pauli Exclusion Principle for electrons with unprecedented accuracy, down to $\frac{\beta^2}{2} \sim 10^{-30}$
09/2005;
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J. Zmeskal,
M. Bazzi, M. Bragadireanu,
P. Bühler,
M. Cargnelli,
C. Curceanu,
F. Ghio,
C. Guaraldo,
M. Iliescu,
T. Ishiwatari, [......],
M. Poli Lener,
A. Rizzo,
O. Vazquez Doce,
A. Romero Vidal,
A. Scordo,
F. Sirghi,
D. Sirghi,
A. d'Ufizzi,
E. Widmann,
B. Wünschek
[show abstract]
[hide abstract]
ABSTRACT: The planned series of measurements with AMADEUS will provide a high precision data set to study antikaon nucleus/nucleon dynamics at low energy. To achieve these goals AMADEUS will make use of the KLOE detector system at LNF, which is ideally suited for our measurements due to their large drift chamber with excellent charge particle tracking and identification probability. An almost 4π calorimeter is available for the detection of neutral particles. R&D work has already started to construct a dedicated target and trigger system for further improvements on kaon stopping efficiency and background suppression.
Nuclear Physics A.
-
O. Vazquez Doce,
J. Zmeskal,
M. Bazzi, M. Bragadireanu,
P. Buhler,
M. Cargnelli,
C. Curceanu,
F. Ghio,
C Guaraldo,
M. Iliescu, [......],
S Okada,
D. Pietreanu,
M. Poli-Lener,
A. Rizzo,
A. Romero Vidal,
A. Scordo,
D. Sirghi,
A. d’Ufizzi,
E. Widmann,
B. Wunschek
http://dx.doi.org/10.1051/epjconf/20100303021.
-
S. Bartalucci,
S. Bertolucci, M. Bragadireanu,
M. Cargnelli,
M. Catitti,
C. Curceanu (Petrascu,
S. Di Matteo,
J.-P. Egger,
C. Guaraldo,
M. Iliescu, [......],
M. Laubenstein,
J. Marton,
E. Milotti,
D. Pietreanu,
T. Ponta,
D.L. Sirghi,
F. Sirghi,
L. Sperandio,
E. Widmann,
J. Zmeskal
[show abstract]
[hide abstract]
ABSTRACT: The Pauli exclusion principle (PEP) is one of the basic principles of modern physics and, even if there are no compelling reasons to doubt its validity, it is still debated today because an intuitive, elementary explanation is still missing, and because of its unique stand among the basic symmetries of physics. The present Letter reports a new limit on the probability that PEP is violated by electrons, in a search for an anomalous Kα line in copper: the presence of this line in the soft X-ray copper fluorescence would signal a transition to a ground state already occupied by 2 electrons. The obtained value, , improves the existing limit by almost two orders of magnitude.
Physics Letters B.
