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106 results on '"S Sedykh"'

1. The $$v^{1/3}_{3}/v^{1/2}_{2}$$ v 3 1 / 3 / v 2 1 / 2 ratio in PbAu collisions at $$\sqrt{s_{\textrm{NN}}} = $$ s NN = 17.3 GeV: a hint of a hydrodynamic behavior

Author

D. Adamová, G. Agakishiev, A. Andronic, D. Antończyk, H. Appelshäuser, V. Belaga, J. Bielčíková, P. Braun-Munzinger, O. Busch, A. Cherlin, S. Damjanović, T. Dietel, L. Dietrich, A. Drees, W. Dubitzky, S. I. Esumi, K. Filimonov, K. Fomenko, Z. Fraenkel, C. Garabatos, P. Glässel, G. Hering, J. Holeczek, M. Kalisky, G. Krobath, V. Kushpil, A. Maas, A. Marín, J. Milošević, D. Miśkowiec, Y. Panebrattsev, Z. Paulínyová, O. Petchenova, V. Petráček, S. Radomski, J. Rak, I. Ravinovich, P. Rehak, H. Sako, W. Schmitz, S. Schuchmann, S. Sedykh, S. Shimansky, J. Stachel, M. Šumbera, H. Tilsner, I. Tserruya, G. Tsiledakis, J. P. Wessels, T. Wienold, J. P. Wurm, S. Yurevich, V. Yurevich, and CERES/NA45 Collaboration

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract The Fourier harmonics, $$v_2$$ v 2 and $$v_3$$ v 3 of negative pions are measured at center-of-mass energy per nucleon pair of $$\sqrt{s_{\textrm{NN}}}$$ s NN = 17.3 GeV around midrapidity by the CERES/NA45 experiment at the CERN SPS in 0–30% central PbAu collisions with a mean centrality of 5.5%. The analysis is performed in two centrality bins as a function of the transverse momentum $$\mathrm {p_{\textrm{T}}}$$ p T from 0.05 GeV/c to more than 2 GeV/c. This is the first measurement of the $$v^{1/3}_{3}/v^{1/2}_{2}$$ v 3 1 / 3 / v 2 1 / 2 ratio as a function of transverse momentum at SPS energies, that reveals, independently of the hydrodynamic models, hydrodynamic behavior of the formed system. For $$\mathrm {p_{\textrm{T}}}$$ p T above 0.5 GeV/c, the ratio is nearly flat in accordance with the hydrodynamic prediction and as previously observed by the ATLAS and ALICE experiments at the much higher LHC energies. The results are also compared with the SMASH-vHLLE hybrid model predictions, as well as with the SMASH model applied alone.

Published
2024
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2. Milk Exosomes: Next-Generation Agents for Delivery of Anticancer Drugs and Therapeutic Nucleic Acids

Author

Anna M. Timofeeva, Anastasia P. Paramonik, Sergey S. Sedykh, and Georgy A. Nevinsky

Subjects
exosomes, milk exosomes, milk vesicles, extracellular vesicles, drug delivery, target delivery, Biology (General), QH301-705.5, Chemistry, QD1-999
Abstract

Exosomes are nanovesicles 40–120 nm in diameter secreted by almost all cell types and providing humoral intercellular interactions. Given the natural origin and high biocompatibility, the potential for loading various anticancer molecules and therapeutic nucleic acids inside, and the surface modification possibility for targeted delivery, exosomes are considered to be a promising means of delivery to cell cultures and experimental animal organisms. Milk is a unique natural source of exosomes available in semi-preparative and preparative quantities. Milk exosomes are highly resistant to the harsh conditions of the gastrointestinal tract. In vitro studies have demonstrated that milk exosomes have an affinity to epithelial cells, are digested by cells by endocytosis mechanism, and can be used for oral delivery. With milk exosome membranes containing hydrophilic and hydrophobic components, exosomes can be loaded with hydrophilic and lipophilic drugs. This review covers a number of scalable protocols for isolating and purifying exosomes from human, cow, and horse milk. Additionally, it considers passive and active methods for drug loading into exosomes, as well as methods for modifying and functionalizing the surface of milk exosomes with specific molecules for more efficient and specific delivery to target cells. In addition, the review considers various approaches to visualize exosomes and determine cellular localization and bio-distribution of loaded drug molecules in tissues. In conclusion, we outline new challenges for studying milk exosomes, a new generation of targeted delivery agents.

Published
2023
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3. The methodology of studying the ideological and value aspects of the Islamic education development in the Russian Federation

Author

N. S. Sedykh

Subjects
Fuel Technology, Energy Engineering and Power Technology
Abstract

The article reveals the prospects of post-non-classical scientific methodology application in the study of the ideological and value aspects of the development of Islamic education in Russia. The paper also provides the substantial description of the object, subject and objectives of the study from the angle of modern intellectual trends. Moreover, the research takes as an aim the implementation of the principle of interdisciplinarity and a poly-paradigmatic approach where the main objective is to obtain the meaningful result of theoretical and applied value. The author also considers the main methodological principles, mentioning the strategy and methods of empirical research, enumerating the characteristics of the proposed analytical and communicative research methods. It is shown that the results obtained will make it possible to fully characterize the ideological and value aspects of the development of Islamic education in Russia and will find their application in determining promising areas for further dialogue interaction between state authorities and Muslim spiritual administrations to improve the system of religious education in the Russian Federation.

Published
2023

5. Thermometry System of NICA Booster Superconducting Magnets

Author

G. S. Sedykh, A. Kirichenko, E. V. Gorbachev, S. V. Romanov, N. V. Pilyar, Valery Volkov, and R. A. Smolkov

Subjects
Physics, Nuclear and High Energy Physics, Nuclotron, Resistive touchscreen, Radiation, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Nuclear engineering, Superconducting magnet, 01 natural sciences, Temperature measurement, Atomic and Molecular Physics, and Optics, Synchrotron, law.invention, Data acquisition, law, Booster (electric power), 0103 physical sciences, Physics::Accelerator Physics, Radiology, Nuclear Medicine and imaging, Nuclear Experiment, 010306 general physics, Booster synchrotron
Abstract

The NICA accelerator complex is developed on the JINR base in Dubna for performing physical experiments on colliding beams of heavy ions. It consists of the injection complex, booster synchrotron, upgraded Nuclotron synchrotron, and heavy-ion collider. The booster is currently under assembly. The system, developed at the LHEP JINR to perform precise temperature measurements of superconducting magnets of the booster synchrotron, is described. The thermometry system includes more than 240 resistive TVO-type temperature sensors, the National Instruments data acquisition system, software based on Tango Controls technology, and a web-client application.

Published
2020

6. RestDS2: the C++ TANGO REST API Implementation

Author

V. G. Elkin, E. V. Gorbachev, and G. S. Sedykh

Subjects
Physics, Rest (physics), Nuclear and High Energy Physics, Class (computer programming), Radiation, 010308 nuclear & particles physics, business.industry, Access control, Web access, computer.software_genre, 01 natural sciences, Atomic and Molecular Physics, and Optics, Control system, 0103 physical sciences, Operating system, Radiology, Nuclear Medicine and imaging, 010306 general physics, business, computer
Abstract

RestDS2 is a Tango class which implements the C++ Tango REST API. It is developed at LHEP JINR to provide web access to Tango devices of the control system of the NICA accelerator complex. The module organization, its usage, results of tests, the access control system and development progress are described.

Published
2020

7. Unperturbed inverse kinematics nucleon knockout measurements with a carbon beam

Author

S. Morozov, T. Atovullaev, O. Gavrischuk, I. Rufanov, D. M. Rossi, I. Slepnev, V. Tcholakov, V. Zhezher, Yu. Potrebenikov, E.P. Segarra, A. Timoshenko, A. Taranenko, A. Corsi, A. Shutov, D. Blaschke, A. Terletsky, G. Musulmanbekov, A. Kuznetsov, A. Vishnevsky, Herbert A. Simon, V. Vasendina, E. Piasetzky, V. Lenivenko, R. Kattabekov, D. Sakulin, A. Dmitriev, S. Lobastov, P. Dulov, Yu. Ivanova, O. Warmusz, N. Topilin, V. Rogov, M. Duer, P. Senger, V. Spaskov, D. Suvarieva, A. Morozov, Alexander Schmidt, N. Lashmanov, Kh. U. Abraamyan, I. Slepov, K. Gertsenberger, N. Zamiatin, D. Baranov, M. Strikhanov, V. Yurevich, K. Boretzky, V. Babkin, V. Samsonov, G. Agakishiev, N. Karpushkin, D. Bogoslovsky, V. Kekelidze, D. Peresunko, Y.-G. Ma, I. Filippov, A. Ciszewski, A. Ivashkin, D. Egorov, B. Topko, A. Zinchenko, M. Patsyuk, V. Shumikhin, V. Plotnikov, O. Petukhov, S. Bazylev, V. Shutov, Carlos A. Bertulani, M. Buryakov, A. Fediunin, V. Tikhomirov, E. Litvinenko, A. Makankin, I. Korover, D. Blau, S. Khabarov, Yu. Kiryushin, S. Piyadin, A. Stavinskiy, V. Kolesnikov, D. Finogeev, A. Kovalenko, M. Golubeva, M. Kapishin, A. Chebotov, D. Nikitin, A. Dryablov, J. Tanaka, Oleg B. Tarasov, Igor Gašparić, S. Kakurin, Or Hen, J. Kahlbow, F. Guber, Yu. Kopylov, O. Teryaev, V. Wagner, I. Selyuzhenkov, A. Malakhov, O. Streltsova, A. Kolozhvari, V. Burtsev, P. Alekseev, M. Rumyantsev, H. Törnqvist, E. Zherebtsova, S. Sedykh, P. Rukoyatkin, I. Gabdrakhmanov, A. Bolozdynya, A. Kugler, M. Shitenkov, N. Barbashina, N. Zhigareva, A. Izvestnyy, Yu. Kovalev, S. Kuklin, K. Roslon, N. Tarasov, O. Rogachevsky, A. Galavanov, S. Merts, Thomas Aumann, B. Dabrowska, V. Palchik, L. Kovachev, E. Atkin, R. Nagdasev, A. Maksymchyuk, V. Golovatyuk, N. Sukhov, J. Chen, G. Laskaris, E. Zubarev, V. Slepnev, T. Aushev, A. Sorin, B. Löher, S. Sergeev, V. Panin, V. Karjavin, A. Sheremeteva, E. Kulish, V. Sosnovtsev, G. Pokatashkin, G. Johansson, S. Buzin, K. Filippov, E. Streletskaya, M. Peryt, I. Mardor, Yu.P. Petukhov, V. Tarasov, H. Scheit, M. Zuev, P. Batyuk, V. Balandin, A. Shchipunov, I. Yaron, E. Ladygin, Song Zhang, D. Dabrowski, R. Cruz-Torres, A. Beck, T. Starecki, N. Voytishin, I. Tyapkin, A. Kisiel, and S. Afanasiev

Subjects
Physics, Hydrogen, Isotope, Scattering, Nuclear Theory, General Physics and Astronomy, chemistry.chemical_element, nuclear structure, experiments with inverse kinematics, quasi-free scattering, short-range correlations, 01 natural sciences, 010305 fluids & plasmas, Ion, Nuclear physics, chemistry, 0103 physical sciences, Particle, Facility for Antiproton and Ion Research, 010306 general physics, Nucleon, Wave function, Nuclear Experiment
Abstract

Particle knockout scattering experiments1,2 are fundamental for mapping the structure of atomic nuclei2–6, but their interpretation is often complicated by initial- and final-state interactions of the incoming and scattered particles1,2,7–9. Such interactions lead to reduction in the scattered particle flux and distort their kinematics. Here we overcome this limitation by measuring the quasi-free scattering of 48 GeV c–1 12C ions from hydrogen. The distribution of single protons is studied by detecting two protons at large angles in coincidence with an intact 11B nucleus. The 11B detection suppresses the otherwise large distortions of reconstructed single-proton distributions induced by initial- and final-state interactions. By further detecting residual 10B and 10Be nuclei, we also identified short-range correlated nucleon–nucleon pairs9–13 and provide direct experimental evidence for separation of the pair wavefunction from that of the residual many-body nuclear system9,14. All measured reactions are well described by theoretical calculations that include no distortions from the initial- and final-state interactions. Our results showcase the ability to study the short-distance structure of short-lived radioactive nuclei at the forthcoming Facility for Antiproton and Ion Research (FAIR)15 and Facility for Rare Isotope Beams (FRIB)16 facilities, which is relevant for understanding the structure and properties of nuclei far from stability and the formation of visible matter in the Universe. Initial- and final-state interactions distort the kinematics in particle knockout scattering experiments, complicating their interpretation. These effects are suppressed by detecting 11B nuclei in quasi-free scattering of 12C ions from hydrogen.

Published
2021

8. Triangular flow of negative pions emitted in PbAu collisions at sNN=17.3 GeV

Author

I. Ravinovich, D. Antończyk, Michal Sumbera, G. Agakichiev, Iu. Karpenko, Peter Glassel, S. Damjanovic, Axel Maas, J. Holeczek, D. Miśkowiec, G. Tsiledakis, L. Dietrich, Pavel Rehak, G. Hering, V. Kushpil, S. Yurevich, J. Rak, Jovan Milosevic, H. Tilsner, M. Kalisky, Johanna Stachel, Thomas Dietel, J. Bielcikova, S. Shimansky, Dagmar Adamová, Oliver Busch, Hiroyuki Sako, W. Schmitz, S. I. Esumi, O. Petchenova, S. Sedykh, V. Petracek, S. Schuchmann, A. Drees, G. Krobath, Peter Braun-Munzinger, K. Fomenko, K. Filimonov, Ana Maria Marin, V. V. Belaga, A. Cherlin, I. Tserruya, T. Wienold, V. I. Yurevich, S. Radomski, Anton Andronic, Z. Fraenkel, W. Dubitzky, C. Garabatos, H. Appelshäuser, Y. Panebrattsev, J.P. Wurm, and Johannes Peter Wessels

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, 010308 nuclear & particles physics, 01 natural sciences, Nuclear physics, Angular distribution, Pion, Cascade, 0103 physical sciences, Transverse momentum, Heavy ion, Multiplicity (chemistry), Impact parameter, Nuclear Experiment, 010306 general physics
Abstract

Differential triangular flow, v 3 ( p T ) , of negative pions is measured at s NN = 17.3 GeV around midrapidity by the CERES/NA45 experiment at CERN in central PbAu collisions in the range 0–30% with a mean centrality of 5.5%. This is the first measurement as a function of transverse momentum of the triangular flow at SPS energies. The p T range extends from about 0.05 GeV/ c to more than 2 GeV/ c . The triangular flow magnitude, corrected for the HBT effects, is smaller by a factor of about 2 than the one measured by the PHENIX experiment at RHIC and the ALICE experiment at the LHC. Within the analyzed range of central collisions no significant centrality dependence is observed. The data are found to be well described by a viscous hydrodynamic calculation combined with an UrQMD cascade model for the late stages.

Published
2017

9. The Nuclotron and Nica control system development status

Author

T. V. Rukoyatkina, A. Kirichenko, S. V. Romanov, Valery Volkov, D. V. Monakhov, V. Andreev, E. V. Gorbachev, and G. S. Sedykh

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Nuclotron, Radiation, 010308 nuclear & particles physics, Control system, 0103 physical sciences, Proton Synchrotron, Radiology, Nuclear Medicine and imaging, 010306 general physics, 01 natural sciences, Atomic and Molecular Physics, and Optics
Abstract

The Nuclotron is a 6 GeV/n superconducting proton synchrotron operating at JINR, Dubna since 1993. It will be the core of the future accelerating complex NICA which is under construction now. The TANGO based control system of the accelerating complex is under development now. The report describes its structure, main features and present status.

Published
2016

10. TANGO standard software to control the Nuclotron beam slow extraction

Author

G. S. Sedykh, V. Andreev, S. V. Romanov, E. V. Gorbachev, V. A. Isadov, A. Kirichenko, and Valery Volkov

Subjects
Physics, Nuclear and High Energy Physics, Nuclotron, Radiation, 010308 nuclear & particles physics, business.industry, Control (management), 01 natural sciences, Atomic and Molecular Physics, and Optics, Software, Control system, 0103 physical sciences, Radiology, Nuclear Medicine and imaging, 010306 general physics, business, Beam (structure), Computer hardware
Abstract

TANGO Controls is a basis of the NICA control system. The report describes the software which integrates the Nuclotron beam slow extraction subsystem into the TANGO system of NICA. Objects of control are power supplies for resonance lenses. The software consists of the subsystem device server, remote client and web-module for viewing the subsystem data.

Published
2016

11. The thermometry system of superconducting magnets test bench for the Nica accelerator complex

Author

E. V. Gorbachev, Valery Volkov, A. Kirichenko, and G. S. Sedykh

Subjects
Physics, Nuclear and High Energy Physics, Test bench, Radiation, Temperature control, 010308 nuclear & particles physics, business.industry, Mechanical engineering, Superconducting magnet, Client, 01 natural sciences, Thermostat, Atomic and Molecular Physics, and Optics, law.invention, Software, law, Control system, Magnet, 0103 physical sciences, Radiology, Nuclear Medicine and imaging, 010306 general physics, business
Abstract

Precise temperature control in various parts of the magnet and thermostat is one of the vital problems during cryogenic tests. The report describes design of the thermometry system, developed at LHEP JINR. This system is the operational prototype for the NICA thermometry system. Besides, the report describes generic software tools, developed for the TANGO-based control system web client software design.

Published
2016

12. Size Effects in Fine Barium Titanate Particles

Author

Dieter Michel, E. V. Charnaya, Jürgen Haase, and P. S. Sedykh

Subjects
Phase transition, Materials science, Shell (structure), Analytical chemistry, Nuclear magnetic resonance spectroscopy, Atmospheric temperature range, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Tetragonal crystal system, chemistry.chemical_compound, Nuclear magnetic resonance, chemistry, Barium titanate, Particle, Particle size
Abstract

137Ba NMR spectroscopy is very suitable to study size effects in very fine particles of barium titanate. The particle sizes varied between 155 and 15 nm. The NMR measurements were carried out within a temperature range of 295 to 420 K covering also the cubic to tetragonal phase transition at TC . Below TC the NMR line shape was explained by a superposition of two contributions the relative fractions of which were analyzed over a wider temperature range. Assuming the core-shell model the thickness of the outer shell was estimated. The shell thickness strongly decreased with decreasing particle size. The applicability of other structural models was also discussed.

Published
2010

13. MAS NMR studies of nanoporous matrices filled with sodium nitrite

Author

S. V. Baryshnikov, E. V. Charnaya, A. G. Gorchakov, Cheng Tien, P. S. Sedykh, and Dieter Michel

Subjects
chemistry.chemical_compound, Nuclear magnetic resonance, Materials science, chemistry, Nanoporous, Phase (matter), Inorganic chemistry, Nuclear magnetic resonance spectroscopy, Nitrite, Condensed Matter Physics, Molecular sieve, Sodium nitrite, Electronic, Optical and Magnetic Materials
Abstract

The sodium nitrite NaNO2 incorporated into MCM-41 molecular sieves with pore sizes of 20, 26, and 37 A has been investigated by 23Na magic-angle spinning NMR spectroscopy. It has been demonstrated that the structure of the crystalline phase of the nitrite in a confined geometry is similar to the structure of bulk nitrite NaNO2. The direct proof of the diffuse melting of sodium nitrite in the pores has been obtained. The NMR signal of the molten sodium nitrite phase has been observed at temperatures close to the completion of the melting.

Published
2009

14. Scale-dependence of transverse momentum correlations in Pb Au collisions at 158A GeV/c

Author

Peter Glassel, Jovan Milosevic, V. I. Yurevich, J. Holeczek, V. Petracek, Y. Panebrattsev, J.P. Wurm, S. Damjanovic, D. Miśkowiec, Dagmar Adamová, Andreas Pfeiffer, S. Sedykh, S. Yurevich, G. Agakichiev, Axel Maas, Ana Maria Marin, D. Antonczyk, V. Kushpil, Johanna Stachel, Oliver Busch, Alexander Milov, J. Rak, Z. Fraenkel, K. Filimonov, Mateusz Andrzej Ploskon, A. Cherlin, S. Radomski, W. Dubitzky, S. Shimansky, C. Garabatos, H. Tilsner, H. Appelshäuser, L. Dietrich, Pavel Rehak, O. Petchenova, I. Tserruya, T. Wienold, I. Ravinovich, W. Schmitz, Michal Sumbera, V. V. Belaga, S. Bielcikova, G. Tsiledakis, T. Dietel, Wei Xie, A. Drees, Johannes Peter Wessels, S. I. Esumi, Peter Braun-Munzinger, K. Fomenko, and Hiroyuki Sako

Subjects
Physics, Momentum, Nuclear physics, Baryon, Nuclear and High Energy Physics, Pair production, Elliptic flow, Hadron, Nuclear Experiment, Nucleon, Super Proton Synchrotron, Charged particle
Abstract

We present results on transverse momentum correlations of charged particle pairs produced in Pb Au collisions at 158 A GeV / c at the Super Proton Synchrotron. The transverse momentum correlations have been studied as a function of collision centrality, angular separation of the particle pairs, transverse momentum and charge sign. We demonstrate that the results are in agreement with previous findings in scale-independent analyses at the same beam energy. Employing the two-particle momentum correlator 〈 Δ p t , i , Δ p t , j 〉 and the cumulative p t variable x ( p t ) , we identify, using the scale-dependent approach presented in this paper, different sources contributing to the measured correlations, such as quantum and Coulomb correlations, elliptic flow and mini-jet fragmentation.

Published
2008

15. Modification of the ρ meson detected by low-mass electron–positron pairs in central Pb Au collisions at 158A GeV/c

Author

Z. Fraenkel, J. Rak, L. Dietrich, Pavel Rehak, Alexander Milov, O. Petchenova, S. Shimansky, Michal Sumbera, Jovan Milosevic, I. Tserruya, K. Fomenko, J. Holeczek, V. I. Yurevich, Axel Maas, S. Sedykh, S. Damjanović, V. Petracek, A. Drees, Peter Braun-Munzinger, Dagmar Adamová, T. Wienold, H. Tilsner, G. Agakichiev, S. I. Esumi, Johannes Peter Wessels, A. Cherlin, D. Miskowiec, Oliver Busch, D. Antonczyk, Andreas Pfeiffer, K. Filimonov, S. Yurevich, Wei Xie, Peter Glassel, T. Dietel, W. Dubitzky, C. Garabatos, H. Appelshäuser, V. V. Belaga, H. Sako, I. Ravinovich, V. Kushpil, Ana Maria Marin, Y. Panebrattsev, J.P. Wurm, Johanna Stachel, J. Bielcikova, and W. Schmitz

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Rho meson, Meson, Nuclear Theory, Hadron, FOS: Physical sciences, Nuclear physics, Baryon, Pair production, Positron, Antimatter, Nuclear Physics - Experiment, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment, Lepton
Abstract

We present a measurement of $e^+e^-$ pair production in central Pb-Au collisions at 158$A$ GeV/$c$. As reported earlier, a significant excess of the $e^+e^-$ pair yield over the expectation from hadron decays is observed. The improved mass resolution of the present data set, recorded with the upgraded CERES experiment at the CERN-SPS, allows for a comparison of the data with different theoretical approaches. The data clearly favor a substantial in-medium broadening of the $\rho$ spectral function over a density-dependent shift of the $\rho$ pole mass. The in-medium broadening model implies that baryon induced interactions are the key mechanism to in-medium modifications of the $\rho$-meson in the hot fireball at SPS energy., Comment: Revised version

Published
2008

16. Statistical equations and methods applied to the precision muon experiment at BNL

Author

H. N. Brown, S. Sedykh, Lawrence Sulak, F. J. M. Farley, J. M. Paley, G. zu Putlitz, S. I. Redin, Klaus-Peter Jungmann, F. Krienen, L. Duong, I. Kronkvist, Masahiko Iwasaki, T. Qian, P. T. Debevec, Alexei Trofimov, Wuzheng Meng, J. P. Miller, D. Kawall, M. Grosse-Perdekamp, R. Prigl, J. Mi, R. McNabb, E. Efstathiadis, A. Steinmetz, A. Yamamoto, Yannis K. Semertzidis, D. Nikas, G. Bunce, B. L. Roberts, B. Bousquet, J. Kindem, C. Ozben, G. W. Bennett, B.I. Khazin, Q. Peng, C. Timmermans, A. Lam, I. Logashenko, M. Kawamura, Frederick Gray, M. Deile, William Morse, Yu. F. Orlov, M. Sossong, V. W. Hughes, Yu. M. Shatunov, O. Rind, G.V. Fedotovich, D.N. Grigoriev, N.M. Ryskulov, P. M. Shagin, A. Grossmann, Y.Y. Lee, D. Warburton, J. Pretz, G. T. Danby, P. von Walter, Satish Dhawan, E. P. Sichtermann, V. P. Druzhinin, Rasmus Larsen, H. Deng, M. F. Hare, D. Winn, D. Urner, X. Huang, C. J. G. Onderwater, E. P. Solodov, R. M. Carey, D. Zimmerman, C. C. Polly, William Deninger, D. W. Hertzog, S. Giron, and P. Cushman

Subjects
Physics, Larmor precession, Nuclear and High Energy Physics, Muon, Quality (physics), Nuclear magnetic resonance, Minification, Electron, Function (mathematics), Instrumentation, Spin-½, Computational physics, Weighting
Abstract

In the muon ( g - 2 ) experiment at Brookhaven National Laboratory, the spin precession frequency ω a is obtained from a standard χ 2 minimization fit applied to the time distribution of decay electrons. The unusually high accuracy ( ∼ 0.5 ppm ) of the experiment puts stringent requirements on the quality of the fit and the level of understanding of the statistical properties of the fitted parameters. We discuss the properties of the fits and their implications on the derived value for ω a , including estimates of the effect of an imperfect fit function, methods of including additional external information to reduce the error, the effects of splitting the data into many smaller subsets of data, applying different weighting methods to the data using energy information, and various tests of data suitability.

Published
2007

17. Latest results on pair production in CERES

Author

S. Radomski, V. Kushpil, W. Seipp, S. I. Esumi, D. Miśkowiec, J. Rak, Axel Maas, W. Schmitz, S. Yurevich, D. Antonczyk, R. Ortega, Michal Sumbera, G. Agakichiev, I. Ravinovich, A. Drees, H. Tilsner, G. Krobath, H. Sako, Z. Fraenkel, Jovan Milosevic, S. Damjanović, G. Tsiledakis, Johannes Peter Wessels, L. Dietrich, C. Garabatos, T. Wienold, Pavel Rehak, Oliver Busch, S. Sedykh, H. Appelshäuser, R. Campagnolo, K. Fomenko, Peter Glassel, V. Petracek, W. Ludolphs, I. Tserruya, Anton Andronic, Ana Maria Marin, K. Filimonov, J. Bielcikova, Peter Braun-Munzinger, Bernd Stefan Windelband, Luciano Musa, V. I. Yurevich, Jurgen Schukraft, O. Petchenova, A. Cherlin, Y. Panebrattsev, Dagmar Adamová, J.P. Wurm, V. Belaga, S. Shimansky, Johanna Stachel, T. Dietel, J. Holeczek, and G. Hering

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Electron pair, Large Hadron Collider, Meson, Physics::Instrumentation and Detectors, Nuclear Theory, Hadron, Elementary particle, Quarkonium, Nuclear physics, Particle decay, Pair production, High Energy Physics::Experiment, Nuclear Experiment
Abstract

Recent results of the CERES experiment at the CERN SPS on low-mass electron pair analysis and ϕ → K + K − are discussed and compared to models.

Published
2005

18. Low-mass lepton pair production in Pb-Au collisions at 40 A.GeV

Author

T. Dietel, K. Fomenko, C. Garabatos, S. I. Esumi, Axel Maas, Bernd Stefan Windelband, H. Tilsner, Wei Xie, H. J. Specht, D. Miśkowiec, A. Drees, Peter Glassel, I. Tserruya, J. Holeczek, H. Sako, M. Richter, G. Hering, Johanna Stachel, Johannes Peter Wessels, Z. Fraenkel, Jan Rak, S. Sedykh, A. Cherlin, Jurgen Schukraft, B. Lenkeit, V. I. Yurevich, S. Shimansky, S. Damjanović, Y. Panebrattsev, W. Schmitz, T. Wienold, J.P. Wurm, Alexander Milov, L. Dietrich, Pavel Rehak, Dagmar Adamová, Michal Sumbera, S. Yurevich, Jovan Milosevic, V. Belaga, J. Slívová, V. Petracek, W. Seipp, I. Ravinovich, G. Agakichiev, K. Filimonov, A. Pfeiffer, Peter Braun-Munzinger, Ana Maria Marin, O. Petchenova, V. Kushpil, and H. Appelshäuser

Subjects
Hadronic decay, Physics, Phase transition, Chiral symmetry, Particle physics, Annihilation, Large Hadron Collider, General Physics and Astronomy, Nuclear physics, Pair production, High Energy Physics::Experiment, Nuclear Experiment, Low Mass, Lepton
Abstract

The CERES/NA45 experiment at the CERN SPS has previously measurede e pair production in 160 A GeV Pb-Au collisions. In the mass region m 0 2G eV/c 2 , an enhancement of 2 7 0 4(stat.) 0 5(syst.) compared to the expectation from known hadronic decay sources was observed. In the 40 A GeV data taken in 1999, an enhancement is again found; a preliminary anal- ysis gives an even larger value of 5 0 1 3(stat.). The results are compared to theoretical model calculations based on π π annihilation with a modified ρ-propagator; they may be related to chiral symmetry restoration.

Published
2003

19. Recent results from the BNL g-2 experiment

Author

D.N. Grigoriev, D. Zimmerman, M. Sossong, C. Ozben, C. C. Polly, P. Cushman, Satish Dhawan, J. Pretz, F. J. M. Farley, I. Logashenko, P. von Walter, E. P. Solodov, G. zu Putlitz, S. I. Redin, R. M. Carey, Klaus-Peter Jungmann, D. W. Hertzog, A. Grossman, Frederick Gray, F. Krienen, D. Urner, Masahiko Iwasaki, S. Giron, C. J. G. Onderwater, L. Duong, Wuzheng Meng, Y.Y. Lee, H. N. Brown, Rasmus Larsen, R. Prigl, J. Mi, L. R. Sulak, J. P. Miller, O. Rind, H. Deng, B. L. Roberts, R. McNabb, A. Yamamoto, J. M. Paley, N.M. Ryskulov, William Deninger, D. Winn, C. Timmermans, D. Warburton, Alexei Trofimov, Yannis K. Semertzidis, E. P. Sichtermann, E. Efstathiadis, A. Steinmetz, M. F. Hare, S. Sedykh, G.V. Fedotovich, William Morse, I. Kronkvist, M. Deile, G. T. Danby, D. Kawall, V. P. Druzhinin, D. Nikas, P. T. Debevec, V. W. Hughes, M. Grosse-Perdekamp, Yu. M. Shatunov, J. Kindem, B.I. Khazin, M. Kawamura, G. Bunce, and Yuri F. Orlov

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, Anomalous magnetic dipole moment, Electron, Atomic and Molecular Physics, and Optics, Nuclear physics, Data set, Magnetic-moment, Physics::Accelerator Physics, High Energy Physics::Experiment, National laboratory, Storage ring
Abstract

The status of the muon g — 2 experiment at the AGS facility of Brookhaven National Laboratory is discussed. Data obtained in 1999 with positive muons has been analyzed and published. The final data set contained 0.95 × 10 9 events and had an accuracy of 1.3 ppm . Approximately four times more data with positive muons and three times more data with negative muons were obtained in 2000 and 2001, respectively. These data were obtained with a more uniform magnetic field and with different storage ring tunes. An accuracy of the order of 0.5 ppm is anticipated.

Published
2002

20. Recent results and current status of the muon g-2 experiment at BNL

Author

Alexei Trofimov, E. Efstathiadis, A. Steinmetz, Q. Peng, Yu. F. Orlov, P. von Walter, E. P. Solodov, D.N. Grigoriev, R. M. Carey, Yannis K. Semertzidis, Rasmus Larsen, Wuzheng Meng, H. Deng, A. Yamamoto, D. Nikas, D. Urner, G. T. Danby, D. Winn, J. M. Paley, R. Prigl, J. Mi, R. McNabb, S. K. Dhawan, V. P. Druzhinin, B. L. Roberts, F. Krinen, T. Qian, P. Cushman, Frederick Gray, C. J. G. Onderwater, J. Kindem, F. J. M. Farley, C. Ozben, P. T. Debevec, G. zu Putlitz, Yu. M. Shatunov, M. Deile, P. M. Shagin, S. I. Redin, X. Huang, E. P. Sichtermann, C. Timmermans, M. F. Hare, I. Kronkvist, B. Bousquet, O. Rind, I.B. Logashenko, B.I. Khazin, L. Duong, M. Kawamura, J. P. Miller, D. Warburton, M. Sossong, J. Pretz, D. Kawall, A. Grossmann, G. Bunce, Klaus-Peter Jungmann, Masahiko Iwasaki, V. W. Hughes, A. Lam, H. N. Brown, N.M. Ryskulov, S. Sedykh, M. Grosse-Perdekamp, G. W. Bennett, D. Zimmerman, William Deninger, L. R. Sulak, Y. Y. Lee, William Morse, D. W. Hertzog, S. Giron, and G.V. Fedotovich

Subjects
Physics, Particle physics, Muon, Anomalous magnetic dipole moment, General Physics and Astronomy, Charge (physics), Elementary particle, Electron, Nmr, Standard Model, Nuclear physics, Anomalous magnetic-moment, Positive muon, Storage ring, Lepton
Abstract

The measurement of the (g−2) value of leptons provides a unique test of theory since it is the only quantity (unlike charge and mass) calculable in the framework of the Standard Model of elementary particles. The muon (g−2) experiment E821 is currently in progress at Brookhaven National Laboratory. Four data taking runs for positive muons and one run for negative muons were successfully accomplished in 1997–2000 and 2001, respectively. Results of the 1997–2000 runs have been published, thus completing our experiment for μ+. Data analysis for the 2001 run for μ− is currently in progress. To provide measurement of \(a_\mu = \tfrac{1} {2}(g - 2)_{\mu ^ - }\) at the same level of accuracy as for \(a_{\mu ^ + } = \tfrac{1} {2}(g - 2)_{\mu ^ + }\), we need to have one more data taking run.

Published
2002

21. Lambda production in 40 A GeV/c Pb$ndash$Au collisions

Author

W Schmitz for the CERES Collaboration, D Adamov$aacute$, G Agakichiev, H Appelsh$auml$user, V Belaga, P Braun-Munzinger, A Cherlin, S Damjanovi$cacute$, T Dietel, L Dietrich, A Drees, S I Esumi, K Filimonov, K Fomenko, Z Fraenkel, C Garabatos, P Gl$auml$ssel, G Hering, V Kushpil, B Lenkeit, A Maas, A Mar$iacute$n, F Messer, J Milosevi$cacute$, A Milov, D Miskowiec, Yu Panebrattsev, O Petchenova, V Petr$aacute$cek, A Pfeiffer, J Rak, I Ravinovich, P Rehak, H Sako, W Schmitz, J Schukraft, S Sedykh, S Shimansky, J Sl$iacute$vov$aacute$, H J Specht, J Stachel, M Sumbera, H Tilsner, I Tserruya, J P Wessels, T Wienold, J P Wurm, W Xie, S Yurevich, and V Yurevich

Subjects
Momentum, Nuclear physics, Physics, Nuclear and High Energy Physics, Spectrometer, Physics::Instrumentation and Detectors, Hadron, Physics::Accelerator Physics, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Nuclear Experiment, Lambda, Beam (structure)
Abstract

During the 1999 lead run, CERES has measured hadron and electron-pair production at 40 A GeV/c beam momentum with the spectrometer upgraded by the addition of a radial TPC. Here the analysis of lambda and antilambda will be presented.

Published
2002

22. Muon g — 2 experiment at Brookhaven National Laboratory

Author

N.M. Ryskulov, L. Duong, C. Ozben, P. Cushman, F. Krienen, D.N. Grigoriev, H. N. Brown, Rasmus Larsen, Wuzheng Meng, Y.Y. Lee, P. von Walter, Yu. M. Shatunov, G.V. Fedotovich, H. Deng, M. Sossong, William Deninger, D. Winn, A. Grossmann, J. Pretz, E. P. Sichtermann, D. Urner, M. F. Hare, E. P. Solodov, R. M. Carey, C. Timmermans, William Morse, V. W. Hughes, F. J. M. Farley, Alexei Trofimov, R. Prigl, J. Mi, E. Efstathiadis, A. Steinmetz, D. Warburton, R. McNabb, D. Zimmerman, G. zu Putlitz, D. Kawall, S. I. Redin, D. Nikas, C. C. Polly, J. Kindem, Satish Dhawan, J. M. Paley, L. R. Sulak, Klaus-Peter Jungmann, J. P. Miller, B. L. Roberts, Masahiko Iwasaki, Yannis K. Semertzidis, G. T. Danby, C. J. G. Onderwater, M. Kawamur, V. P. Druzhinin, M. Deile, Frederick Gray, P. T. Debevec, A. Yamamoto, D. W. Hertzog, O. Rind, S. Giron, I. Kronkvist, Yuri F. Orlov, G. Bunce, B.I. Khazin, S. Sedykh, I. Logashenko, and M. Grosse-Perdekamp

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Muon, Alternating Gradient Synchrotron, National laboratory, Atomic and Molecular Physics, and Optics
Abstract

A precise measurement of the anomalous g value, a(mu)(+) = (g - 2)/2, for the positive muon has been made at the Brookhaven Alternating Gradient Synchrotron. The result a(mu)(+) = 11 659 202(14)(6) x 10(-10) (1.3 ppm) is in good agreement with previous measurements and has an error one third that of the combined previous data. The current theoretical value from the standard model is a(mu) (SM)= 11 659 159.6(6.7) x 10(-10) (0.57 ppm) and a(mu)(exp)-a(mu)(SM) = 42(16) x 10(-10) in which a(mu)(exp) is the world average experimental value.

Published
2002

23. New results from CERES

Author

Alexander Milov, P. Glässel, J. Holeczek, S. Shimansky, Y. Panebrattsev, J.P. Wurm, V. Petrácek, S. Yurevich, S. Damjanovic, A. Drees, S. Sedykh, A. Sharma, C. Garabatos, P. Rehak, I. Tserruya, H. Sako, J. P. Wessels, H. J. Specht, G. Hering, Peter Braun-Munzinger, D. Miskowiec, M. Richter, T. Dietel, V. Yurevich, O. Petchenova, M. Sumbera, V. Belaga, Axel Maas, Z. Fraenkel, B. Lenkeit, Johanna Stachel, K. Fomenko, A. Cherlin, W. Xie, H. Tilsner, W. Schmitz, A. Marín, K. Filimonov, G. Agakichiev, H. Appelshäuser, V. Kushpil, S.I. Esumi, L. Dietrich, W. Seipp, I. Ravinovich, Jovan Milosevic, B. Windelband, A. Pfeiffer, D. Adamová, J. Rak, J. Slívová, and T. Wienold

Subjects
Physics, Nuclear physics, Nuclear reaction, Nuclear and High Energy Physics, Particle physics, Angular correlation
Published
2002

24. Muon g-2 experiment at Brookhaven National Laboratory

Author

C. Ozben, S. Sedykh, O. Rind, M. Sossong, N.M. Ryskulov, V. W. Hertzog, I. Kronkvist, D. Kawall, Yuri F. Orlov, I. Logashenko, J. Pretz, A. Yamamoto, J. Kindem, W. Earle, G.V. Fedotovich, F. Krienen, Rasmus Larsen, B.I. Khazin, P. V. Walter, Yu. M. Shatunov, M. Kawamura, G. zu Putlitz, E. Hazen, H. Deng, Frederick Gray, Wuzheng Meng, C. Pai, J. P. Miller, C. Timmermans, M. Grosse-Perdekamp, D. Warburton, L. Duong, H. N. Brown, F. J. M. Farley, R. Prigl, J. Mi, D. Winn, R. McNabb, Y. Y. Lee, William Morse, S. I. Redin, Alexei Trofimov, A. Grossmann, L. R. Sulak, A. Steinmetz, G. Bunce, E. P. Sichtermann, P. T. Debevec, J. M. Paley, D. W. Hertzog, S. Giron, Ulrich Haeberlen, G. T. Danby, V. P. Druzhinin, B. L. Roberts, Yannis K. Semertzidis, E. Efstathiadia, C. J. G. Onderwater, D. Urner, S. K. Dhawan, William Deninger, C. C. Polly, E. P. Solodov, R. M. Carey, Klaus-Peter Jungmann, Masahiko Iwasaki, P. Cushman, and D. Nikas

Subjects
Nuclear physics, Data set, Physics, Anomalous magnetic-moment, Nuclear and High Energy Physics, Particle physics, Muon, Anomalous magnetic dipole moment, Astronomy and Astrophysics, Positive muon, National laboratory, Atomic and Molecular Physics, and Optics
Abstract

By the end of an excellent data taking in 1999, we collected approximate to1 billion decay positrons with energy greater than 2 GeV and 30 mus after injection. The analysis of the 1999 data set were performed in parallel by various teams in the collaboration and each team provides a different approach to the analysis. The projected errors are expected to be of order 1.3 ppm statistical and below 0.5 ppm systematic. The data obtained in the 2000 run contains,approximate to4 times more decay positrons compared to 1999.

Published
2001

25. Prototype tests for the ALICE TRD

Author

Tariq Mahmoud, R. Schulze, V. Catanescu, Anton Andronic, C. Xu, O. Winkelmann, S. Sedykh, Harald Appelshaeuser, Mihai Petrovici, Klaus Johannes Reygers, Bernd Stefan Windelband, R.S. Simon, H. Daues, T. Peitzmann, R. Santo, A. Reischl, N. Herrmann, Ch. Finck, Johanna Stachel, A. Devismes, Christoph Blume, Peter Braun-Munzinger, M. Ciobanu, Johannes Peter Wessels, H. Stelzer, and T. Lister

Subjects
Physics::Computational Physics, Physics, Nuclear and High Energy Physics, Large Hadron Collider, Physics::Instrumentation and Detectors, FOS: Physical sciences, Nuclear physics, Transition radiation detector, Pion, Nuclear Energy and Engineering, Radiator (engine cooling), Nuclear Physics - Experiment, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Electrical and Electronic Engineering, ALICE (propellant), Nuclear Experiment
Abstract

A Transition Radiation Detector (TRD) has been designed to improve the electron identification and trigger capability of the ALICE experiment at the Large Hadron Collider (LHC) at CERN. We present results from tests of a prototype of the TRD concerning pion rejection for different methods of analysis over a momentum range from 0.7 to 2 GeV/c. We investigate the performance of different radiator types, composed of foils, fibres and foams., Comment: Presented at the IEEE Nuclear Science Symposium and Medical Imaging Conference, Lyon, October 15-20, 2000 (accepted for publication in IEEE TNS), Latex (IEEEtran.cls), 7 pages, 11 eps figures

Published
2001

27. Electromagnetic calorimeters for the BNL muon (g−2) experiment

Author

Jinsong Ouyang, P. Cushman, O. Rind, M. F. Hare, V. P. Druzhinin, R. M. Carey, B. Bunker, J.R Blackburn, D. Urner, C Coulsey, D. W. Hertzog, T. D. Jones, G de Santi, D. Zimmerman, C. C. Polly, J. P. Miller, Frederick Gray, J. Kindem, D. Winn, P. T. Debevec, Alexei Trofimov, C. J. G. Onderwater, S. Sedykh, C. Timmermans, and S. Giron

Subjects
Physics, Nuclear and High Energy Physics, Photomultiplier, Particle physics, Range (particle radiation), Muon, Anomalous magnetic dipole moment, Physics::Instrumentation and Detectors, Electron, Nuclear physics, Electromagnetic calorimeter, High Energy Physics::Experiment, Neutron, Instrumentation, Energy (signal processing), Storage ring, Lead scintillating fiber
Abstract

A set of 24 lead/scintillating "ber electromagnetic calorimeters has been constructed for the new muon (g!2) experiment at the Brookhaven AGS. These calorimeters were designed to provide very good energy resolution for electrons up to 3 GeV while also yielding excellent timing information. Special requirements in the experiment related to the uniformity of response, the short-term gain and timing stability, and the neutron background led to several unusual design features. The calorimeters were tested and calibrated with electrons in the energy range 0.5}4.0 GeV and have been installed and used in the muon storage ring. The design criteria, construction, and performance of the system are described. ( 2000 Elsevier Science B.V. All rights reserved. PACS: 29.40.V; 13.35.B; 14.60.E

Published
2000

28. Status of the BNL muon (g-2) experiment

Author

W.M. Morse, S. I. Serednyakov, Yu. M. Shatunov, S. Sedykh, C. J. G. Onderwater, N.M. Ryskulov, A. Yamamoto, Lawrence Sulak, O. Rind, C. Timmermans, F. J. M. Farley, M. Sossong, P. Neumayer, H. N. Brown, G. zu Putlitz, D. Urner, S. I. Redin, W. Meng, J. Pretz, I. Kronkvist, P. T. Debevec, E. Hazen, L. Duong, E. Efstathiadis, J. Kindem, Yuri F. Orlov, S. K. Dhawan, J. P. Miller, D. W. Hertzog, M. Tanaka, V. W. Hughes, Frederick Gray, G.T. Danby, Robert Sanders, D. Miller, F. Krienen, Y.Y. Lee, Wen Liu, Klaus-Peter Jungmann, W. Earle, Masahiko Iwasaki, G. Bunce, B.I. Khazin, M. Grosse Perdekamp, M. Kawamura, D. Zimmerman, P. Cushman, C. Pai, D. Warburton, C. C. Polly, H. Deng, D. Winn, A. Grossmann, E. P. Solodov, R. M. Carey, William Deninger, M. F. Hare, G.V. Fedotovich, I.B. Logashenko, R. Prigl, J. Mi, R. McNabb, D. Kawall, Alexei Trofimov, A. Steinmetz, V. P. Druzhinin, B. L. Roberts, S. Giron, Yannis K. Semertzidis, R. Larsen, and Ulrich Haeberlen

Subjects
Larmor precession, Physics, Particle physics, Large Hadron Collider, Muon, Muon storage ring, Meson, Proton, Physics::Instrumentation and Detectors, Electron, Superconducting coils, G factor, Nuclear magnetic resonance, Nuclear physics, Physics::Accelerator Physics, High Energy Physics::Experiment, Supersymmetry, Electrical and Electronic Engineering, Spin precession, Superconducting Coils, Instrumentation, Storage ring, Standard model
Abstract

The muon (g-2) experiment at Brookhaven completed a first run in June and July 1997. The main components of the experiment, which include the superconducting inflector, the superferric storage ring, the electrostatic quadrupoles and the lead-scintillating fiber electron calorimeters, have been commissioned satisfactorily. Our first measurement of the ratio R of the spin precession frequency of the positive muon relative to that of a free proton, R=(3.707219/spl plusmn/0.000048)/spl times/10/sup -3/, is in good agreement with the previous CERN measurements for /spl mu//sup +/ and /spl mu//sup -/, and has approximately the same uncertainty as each of these measurements. In spring 1998 a muon kicker was installed and successfully tested in the storage ring magnet and a significant improvement in the knowledge of the muon g-factor is expected from upcoming runs in August 1998 and January 1999.

Published
1999

29. Status of the g-2 experiment at BNL

Author

D. Kawall, V. B. Golubev, S. Kurokawa, E. P. Solodov, B. J. Hughes, G. Bunce, P. Cushman, P. von Walter, R. M. Carey, A. Stillman, P. T. Debevec, Y.Y. Lee, J. W. Jackson, G.V. Fedotovich, Louis Snydstrup, F. Toldo, A.G. Chertovskikh, Rasmus Larsen, H. Hirabayashi, J. Cullen, M. F. Hare, O. Rind, H. Deng, D. von Lintig, E. Benedict, D. Urner, David Miller, Alexei Trofimov, X. Fei, J. Benante, A. Disco, D. Winn, A. Soukas, E. Efstathiadis, F. J. M. Farley, Yannis K. Semertzidis, R. Prigl, H. N. Brown, R. McNabb, O. N. Ryskulov, Yuri Shatunov, C. Timmermans, Jinsong Ouyang, J. Geller, William Deninger, G. zu Putlitz, S. I. Redin, M. Tanaka, K. Woodle, C. Poly, E. Hazen, B. Bunker, C. Pearson, Y. Mizumachi, M. Grosse Perdekamp, H. E. Ahn, Ulrich Haeberlen, J. Pretz, K. Endo, D. Zimmerman, V. Monich, L. Jia, G. T. Danby, R. P. Shutt, J. Kindem, William Morse, T. D. Jones, A. Maskimov, L. Duong, H. Hseuh, V. P. Druzhinin, S. I. Serednyakov, F. Krienen, Wuzheng Meng, B.I. Khazin, C. Pai, Yuri F. Orlov, Michael A. Green, W. Earle, M. Mapes, A. Grossmann, V. W. Hughes, D. Warbuton, Yu Merzliakov, I. Polk, Satish Dhawan, J. Gerhaeuser, W. A. Worstell, S. Kochis, J. P. Miller, B. L. Roberts, Klaus-Peter Jungmann, Masahiko Iwasaki, J. Sandberg, S. Sedykh, S. Rankowitz, D.H Brown, D. N. Grigorev, I. Logashenko, G. S. Varner, D. W. Hertzog, A. Yamamoto, T. Tallerico, S. Giron, L. R. Sulak, and Precision Frontier

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Muon, Meson, Anomalous magnetic dipole moment, Physics::Instrumentation and Detectors, MUON, Atomic and Molecular Physics, and Optics, Nuclear physics, Pion, DIPOLE-MOMENT, Antimatter, Physics::Accelerator Physics, High Energy Physics::Experiment, ANOMALOUS MAGNETIC-MOMENT, Storage ring, Lepton
Abstract

The muon g-2 experiment at Brookhaven has successfully completed two exploratory runs using pion injection and direct muon injection for checkout and initial data taking. The main components of the experiment, which include the pion beam line, the superconducting storage ring and inflector magnets, the muon kicker and the lead-scintillating fiber calorimeters have been satisfactorily commissioned. First results on the anomalous magnetic moment of the positive muon from pion injection are in good agreement with previous experimental results for a(mu+) and a(mu-) from CERN and of comparable accuracy (13 ppm). Analysis of the 1998 muon injection run is in progress and expected to improve the precision to about 4 ppm. A first production run is scheduled for January 1999 with the goal of reaching the 1 ppm error level.

Published
1999

30. Directed flow of light nuclei in Au+Au collisions at 10.8AGeV/c

Author

J. R. Hall, R. Lacasse, N. Herrmann, M. W. Drigert, M. Clemen, W. C. Chang, E. O'Brien, N. C. daSilva, T. Piazza, Y. Dai, G. David, S. Bennett, Y. Kwon, R. Bersch, M. Rosati, R. Matheus, Claude Andre Pruneau, N. Xu, Peter Braun-Munzinger, J. Barrette, C. L. Woody, Johannes Peter Wessels, W. E. Cleland, R. Bellwied, Upul Sonnadara, Q. Li, O. Dietzsch, Edward L. Reber, J. Dee, S. C. Johnson, S. Sedykh, G. Wang, T. K. Hemmick, J. D. Cole, E. M. Takagui, P. Paul, M. N. Rao, D. Miśkowiec, B. Hong, S. Panitkin, K. Filimonov, T. Vongpaseuth, Johanna Stachel, J. T. Murgatroyd, S. Voloshin, Thomas Michael Cormier, S. McCorkle, M. Pollack, S. K. Mark, C. Zou, T. W. Ludlam, and Y. Zhang

Subjects
Physics, Nuclear and High Energy Physics, Light nucleus, 010308 nuclear & particles physics, Nuclear Theory, Elliptic flow, 01 natural sciences, Nuclear physics, Momentum, Deuterium, Flow (mathematics), 0103 physical sciences, Rapidity, Atomic physics, Nuclear Experiment, 010306 general physics, Anisotropy, Beam (structure)
Abstract

Directed flow of deuterons, tritons, ${}^{3}\mathrm{He},$ and ${}^{4}\mathrm{He}$ is studied in Au+Au collisions at a beam momentum of $10.8A\mathrm{GeV}/c.$ Flow of all particles is analyzed as a function of transverse momentum for different centralities of the collision. The directed flow signal, ${v}_{1}{(p}_{t}),$ is found to increase with particle mass. This mass dependence is strongest in the projectile rapidity region.

Published
1999

31. Particle production and hydrodynamic flow: Recent results from E877 for Au+Au colliaions at AGS energy

Author

K. Filimonov, N. Starinsky, R. Matheus, Peter Braun-Munzinger, S. Voloshin, J. R. Hall, N. Herrmann, Q. Li, R. Bellwied, S. Johnson, Y. Zhang, M. W. Drigert, S. K. Mark, M. Rosati, T.K. Hemmick, B. Hong, J. Dee, S. I. Esumi, E. M. Takagui, S. Panitkin, T. W. Ludlam, S. Sedykh, Johannes Peter Wessels, P. Paul, C. L. Woody, R. Lacasse, J. D. Cole, J. Sheen, T. Vongpaseuth, J.P. Wessels, A. French, Johanna Stachel, C. Zou, J. T. Murgatroyd, W. E. Cleland, M. Trzaska, M. Clemen, Upul Sonnadara, N. Xu, Claude Andre Pruneau, Thomas Michael Cormier, W.C. Chang, N. C. daSilva, S. McCorkle, Y. Dai, Edward L. Reber, V. Pantuev, E. O'Brien, D. Miśkowiec, S. Bennett, Yujin Qi, J. Barrette, R. Bersch, T. Piazza, G. Wang, G. David, Y. Kwon, M. Pollack, and O. Dietzsch

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Hadron, Particle, Particle flow, Rapidity, Nuclear Experiment, Hydrodynamic flow
Abstract

In this article recent results of the E877 collaboration are presented. They include double differential multiplicities and rapidity densities of hadrons produced in Au+Au collisions at 11 AgeV/c, two-particle correlations of like and unlike particles, as well as some recent results on particle flow.

Published
1998

32. Special features of explosion welding in zones of bends of welded elements

Author

A N Kriventsov, V S Sedykh, A V Baluev, and V I Kuz'min

Subjects
Explosion welding, Materials science, Mechanics of Materials, law, Mechanical Engineering, Metallurgy, Metals and Alloys, Welding, law.invention
Abstract

(1998). Special features of explosion welding in zones of bends of welded elements. Welding International: Vol. 12, No. 8, pp. 642-646.

Published
1998

33. Proton and pion production relative to the reaction plane in Au + Au collisions at 11AGeV/c

Author

K. Filimonov, S. C. Johnson, M. Clemen, J. R. Hall, R. Bersch, M. Rosati, Claude Andre Pruneau, Thomas Michael Cormier, D. Miśkowiec, Edward L. Reber, S. McCorkle, W. C. Chang, Y. Dai, G. David, S. Panitkin, N. Herrmann, M. Drigert, Johannes Peter Wessels, J. Dee, S. Sedykh, W. E. Cleland, J. Barrette, Johanna Stachel, C. L. Woody, N. Xu, J. T. Murgatroyd, E. M. Takagui, G. Wang, T. K. Hemmick, Y. Kwon, S. K. Mark, O. Dietzsch, B. Hong, Upul Sonnadara, R. Matheus, Peter Braun-Munzinger, M. N. Rao, S. Voloshin, R. Bellwied, S. Bennett, J. D. Cole, T. Vongpaseuth, N. C. da Silva, E. O'Brien, T. W. Ludlam, Yi Zhang, C. Zou, Q. Li, T. Piazza, R. Lacasse, and M. Pollack

Subjects
Physics, Nuclear and High Energy Physics, Proton, 010308 nuclear & particles physics, 01 natural sciences, Charged particle, Azimuth, Nuclear physics, Transverse plane, Pion, Energy flow, 0103 physical sciences, Rapidity, Atomic physics, Nuclear Experiment, 010306 general physics, Anisotropy
Abstract

Results are presented of an analysis of proton and charged pion azimuthal distributions measured with respect to the reaction plane in Au + Au collisions at a beam momentum of about 11A GeV/c. The azimuthal anisotropy is studied as a function of particle rapidity and transverse momentum for different centralities of the collisions. The triple differential (in rapidity, transverse momentum, and azimuthal angle) distributions are reconstructed. A comparison of the results with a previous analysis of charged-particle and transverse energy flow as well as with model predictions are presented. {copyright} {ital 1997} {ital The American Physical Society}

Published
1997

34. Energy and charged particle flow in10.8AGeV/cAu+Au collisions

Author

Johanna Stachel, N. Herrmann, C. L. Woody, S. Panitkin, C. Zou, R. Matheus, M. Clemen, Peter Braun-Munzinger, Q. Li, G. David, J. T. Murgatroyd, N. Xu, N. C. da Silva, O. Dietzsch, M. Rosati, W. C. Chang, R. Bellwied, M. Drigert, A. Lukaszew, R. Lacasse, J. R. Hall, J. P. Wessels, G. Wang, T. K. Hemmick, Thomas Michael Cormier, S. McCorkle, E. M. Takagui, Upul Sonnadara, T. Piazza, E. O'Brien, J. Barrette, S. K. Mark, Y. Kwon, S. Bennett, T. W. Ludlam, J. D. Cole, Claude Andre Pruneau, M. N. Rao, J. Dee, S. Sedykh, Y. Zhang, B. Hong, W. E. Cleland, and S. Voloshin

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Plane (geometry), 01 natural sciences, Charged particle, Momentum, Nuclear physics, Transverse plane, Pion, 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon, Anisotropy, Event (particle physics)
Abstract

Experimental results and a detailed analysis are presented of the transverse energy and charged particle azimuthal distributions measured by the E877 Collaboration for different centralities of Au+Au collisions at a beam momentum of 10.8A GeV/c. The anisotropy of these distributions is studied with respect to the reaction plane reconstructed on an event-by-event basis using the transverse energy distribution measured by calorimeters. Results are corrected for the reaction plane resolution. For semicentral events we observe directed flow signals of up to 10{percent}. We observe a stronger anisotropy for slow charged particles. For both the charged particle and transverse energy distributions we observe a small but nonzero elliptic anisotropy with the major axis pointing into the reaction plane. Combining the information on transverse energy and charged particle flow we obtain information on the flow of nucleons and pions. The data are compared to event generators and the need to introduce a mean field or nucleon-nucleon potential is discussed. {copyright} {ital 1997} {ital The American Physical Society}

Published
1997

35. Two-particle correlations in Au+Au collisions at AGS energy

Author

Q. Li, T. W. Ludlam, D. Gan, K. Filimonov, Yi Zhang, W. E. Cleland, D. Miśkowiec, O. Dietzsch, E. M. Takagui, Y. Kwon, T. Vongpaseuth, Z. Zhang, B. Hong, R. Matheus, E. O'Brien, Peter Braun-Munzinger, Upul Sonnadara, M. Clemen, M. Trzaska, S. C. Johnson, T. Piazza, N. Starinski, R. Bellwied, S. Bennett, S. Panitkin, C. Zou, Yujin Qi, W. C. Chang, A. Lukaszew, Thomas Michael Cormier, G. Wang, N. Xu, S. Voloshin, S. McCorkle, T. K. Hemmick, J. T. Murgatroyd, R. Lacasse, G. David, M. Pollack, Y. Dai, S. Gilbert, Claude Andre Pruneau, Johanna Stachel, P. Paul, J. Barrette, N. C. daSilva, C. L. Woody, C. L. Jiang, J. D. Cole, S. K. Mark, N. Herrmann, R. Bersch, M. Rosati, M. N. Rao, J. Dee, J. R. Hall, S. Sedykh, J. P. Wessels, and M. W. Drigert

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Pion, High Energy Physics::Lattice, Phase space, Nuclear Theory, Particle, High Energy Physics::Experiment, Nuclear Experiment, Energy (signal processing)
Abstract

Two-particle correlation functions have been measured in Au+Au collisions at the AGS. The one-dimensional correlations are compared to the RQMD predictions. A multidimensional analysis of two-pion correlations allows to extract the average phase space density of pions at freeze-out and the pion source velocity.

Published
1996

36. Directed flow and particle production in Au+Au collisions from experiment E877 at the AGS

Author

Johanna Stachel, Y. Kwon, S. Bennett, S. Panitkin, J. R. Hall, J. P. Wessels, M. Clemen, T. Vongpaseuth, J. T. Murgatroyd, C. L. Woody, N. C. da Silva, Thomas Michael Cormier, M. Pollack, W. C. Chang, T. Piazza, Claude Andre Pruneau, B. Hong, N. Starinsky, Yi Zhang, Y. Dai, R. Matheus, Peter Braun-Munzinger, D. Miśkowiec, O. Dietzsch, M. Drigert, R. Bersch, M. Rosati, J. Barrette, S. Sedykh, Q. Li, R. Bellwied, J. Dee, G. David, C. Zou, E. O'Brien, N. Xu, G. Wang, T. K. Hemmick, S. McCorkle, W. E. Cleland, R. Lacasse, E. M. Takagui, N. Herrmann, Upul Sonnadara, S. C. Johnson, A. Lukaszew, S. Voloshin, S. K. Mark, J. D. Cole, M. N. Rao, and T. W. Ludlam

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Flow (mathematics), Particle, Atomic physics
Published
1995

37. Improved limit on the muon electric dipole moment

Author

L. Duong, Rasmus Larsen, H. Deng, Yannis K. Semertzidis, C. J. G. Onderwater, D. Winn, Satish Dhawan, J. M. Paley, C. Timmermans, M. Sossong, J. Pretz, G.V. Fedotovich, M. Deile, P. M. Shagin, Yu. M. Shatunov, J. P. Miller, T. Qian, F. Krienen, X. Huang, G. T. Danby, N.M. Ryskulov, B. L. Roberts, P. Cushman, R. Prigl, J. Mi, V. P. Druzhinin, Yuri F. Orlov, R. McNabb, D. Kawall, Wuzheng Meng, Y. Mizumachi, S. Sedykh, D. Urner, I. Kronkvist, D. Nikas, D. Zimmerman, M. Grosse-Perdekamp, Q. Peng, J. Kindem, B. Bousquet, E. P. Sichtermann, M. F. Hare, D.N. Grigoriev, C. C. Polly, H. N. Brown, Klaus-Peter Jungmann, E. P. Solodov, O. Rind, G. Bunce, A. Lam, I. Logashenko, D. W. Hertzog, P. von Walter, A. Grossmann, Y.Y. Lee, Masahiko Iwasaki, B.I. Khazin, Frederick Gray, William Deninger, M. Kawamura, D. Warburton, V. W. Hughes, Lawrence Sulak, G. W. Bennett, Alexei Trofimov, E. Efstathiadis, A. Steinmetz, William Morse, F. J. M. Farley, G. zu Putlitz, S. I. Redin, R. M. Carey, A. Yamamoto, C. S. Özben, S. Giron, P. T. Debevec, and Research unit Nuclear & Hadron Physics

Subjects
Physics, Nuclear and High Energy Physics, Muon, Anomalous magnetic dipole moment, Physics::Instrumentation and Detectors, POSITIVE MUON, G-2, FOS: Physical sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Electric dipole moment, Precession, Physics::Accelerator Physics, High Energy Physics::Experiment, Combined result, Limit (mathematics), ANOMALOUS MAGNETIC-MOMENT, Spin (physics), Storage ring
Abstract

Three independent searches for an electric dipole moment (EDM) of the positive and negative muons have been performed, using spin precession data from the muon g-2 storage ring at Brookhaven National Laboratory. Details on the experimental apparatus and the three analyses are presented. Since the individual results on the positive and negative muon, as well as the combined result, d=-0.1(0.9)E-19 e-cm, are all consistent with zero, we set a new muon EDM limit, |d| < 1.9E-19 e-cm (95% C.L.). This represents a factor of 5 improvement over the previous best limit on the muon EDM., 19 pages, 15 figures, 7 tables

Published
2009

38. Modification of jet-like correlations in Pb-Au collisions at 158A GeV/c

Author

Peter Glassel, S. I. Esumi, V. Kushpil, M. Kalisky, S. Yurevich, Alexander Milov, Michal Sumbera, W. Dubitzky, W. Schmitz, C. Garabatos, A. Drees, S. Shimansky, Jovan Milosevic, H. Appelshäuser, I. Ravinovich, S. Sedykh, I. Tserruya, J. Bielcikova, K. Filimonov, Dagmar Adamová, Johanna Stachel, J. Rak, S. Damjanović, Johannes Peter Wessels, V. Petracek, A. Cherlin, V. I. Yurevich, S. Kniege, T. Wienold, Axel Maas, D. Miskowiec, Peter Braun-Munzinger, Oliver Busch, O. Petchenova, Andreas Pfeiffer, Wei Xie, H. Tilsner, Ana Maria Marin, Z. Fraenkel, G. Agakichiev, V. V. Belaga, Y. Panebrattsev, J.P. Wurm, K. Fomenko, D. Antończyk, M. Ploskon, Thomas Dietel, S. Schuchmann, H. Sako, L. Dietrich, Pavel Rehak, and J. Holeczek

Subjects
Physics, Nuclear and High Energy Physics, Energy transfer, FOS: Physical sciences, Charge (physics), Parton, Jet (particle physics), Collision, Charged particle, Nuclear physics, Correlation analysis, Particle, Nuclear Physics - Experiment, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

Results of a two-particle correlation analysis of high-$p_t$ charged particles in Pb-Au collisions at 158$A$ GeV/$c$ are presented. The data have been recorded by the CERES experiment at the CERN-SPS. The correlations are studied as function of transverse momentum, particle charge and collision centrality. We observe a jet-like structure in the vicinity of a high-$p_t$ trigger particle and a broad back-to-back distribution. The yields of associated particles per trigger show a strong dependence on the trigger/associate charge combination. A comparison to PYTHIA confirms the jet-like pattern at the near-side but suggests a strong modification at the away-side, implying significant energy transfer of the hard-scattered parton to the medium., Comment: 4 figures

Published
2009
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39. Azimuthal dependence of pion source radii inPb+Aucollisions at 158AGeV/c

Author

Axel Maas, J. P. Wessels, H. Tilsner, S. Schuchmann, Mateusz Andrzej Ploskon, Anton Andronic, Z. Fraenkel, V. I. Yurevich, S. Esumi, J. Holeczek, S. Radomski, Jana Bielcikova, L. Dietrich, I. Tserruya, Dariusz Czeslaw Miskowiec, G. Hering, Dagmar Adamová, J. Rak, A. Drees, Peter Braun-Munzinger, W. Schmitz, R. Ortega, Ana Maria Marin, H. Sako, G. Agakichiev, Jovan Milosevic, Oliver Busch, I. Ravinovich, Johanna Stachel, S. Yurevich, O. Petchenova, Jurgen Schukraft, V. Belaga, S. Shimansky, V. Kushpil, A. Cherlin, Peter Glassel, Rachik Soualah, W. Dubitzky, C. Garabatos, H. Appelshäuser, Thomas Dietel, M. Kalisky, K. Filimonov, K. Fomenko, S. Sedykh, S. Damjanovic, V. Petráček, G. Tsiledakis, Y. Panebrattsev, J.P. Wurm, T. Wienold, D. Antonczyk, S. Kniege, Pavel Rehak, and Michal Sumbera

Subjects
Physics, Nuclear and High Energy Physics, Meson, Plane (geometry), Nuclear Theory, Hadron, Elementary particle, Alternating Gradient Synchrotron, Nuclear physics, Pion, Physics::Accelerator Physics, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, Relativistic Heavy Ion Collider, Boson
Abstract

We present results of a two-pion correlation analysis performed with the Pb+Au collision data collected by the upgraded CERES experiment in the fall of 2000. The analysis was done in bins of the reaction centrality and the pion azimuthal emission angle with respect to the reaction plane. The pion source, deduced from the data, is slightly elongated in the direction perpendicular to the reaction plane, similarly as was observed at the Brookhaven National Laboratory Alternating Gradient Synchrotron and Relativistic Heavy Ion Collider.

Published
2008

40. Search for Lorentz and CPT violation effects in muon spin precession

Author

A. Lam, G. T. Danby, I. Logashenko, V. P. Druzhinin, Frederick Gray, A. Grossmann, F. Krienen, E. P. Sichtermann, M. F. Hare, G. Bunce, L. Duong, Satish Dhawan, O. Rind, Wuzheng Meng, William Deninger, B.I. Khazin, D. Urner, Lawrence Sulak, J. P. Miller, H. N. Brown, P. Cushman, M. Kawamura, S. Sedykh, P. T. Debevec, F. J. M. Farley, Q. Peng, M. Sossong, B. L. Roberts, D. Nikas, I. Kronkvist, C. S. Özben, G. zu Putlitz, A. Yamamoto, S. I. Redin, J. Kindem, X. Huang, M. Grosse-Perdekamp, D. Warburton, D. Zimmerman, J. Pretz, Yu. M. Shatunov, C. C. Polly, J. M. Paley, D. W. Hertzog, Yuri F. Orlov, D. Kawall, E. P. Solodov, B. Bousquet, N.M. Ryskulov, R. M. Carey, C. J. G. Onderwater, S. Giron, R. Prigl, J. Mi, Y. Mizumachi, V. W. Hughes, T. Qian, G. W. Bennett, C. Timmermans, R. McNabb, William Morse, G.V. Fedotovich, Alexei Trofimov, E. Efstathiadis, A. Steinmetz, Y.Y. Lee, D.N. Grigoriev, P. von Walter, Rasmus Larsen, H. Deng, D. Winn, Yannis K. Semertzidis, M. Deile, P. M. Shagin, Klaus-Peter Jungmann, Masahiko Iwasaki, and KVI - Center for Advanced Radiation Technology

Subjects
Larmor precession, Physics, Particle physics, Muon, Anomalous magnetic dipole moment, CPT symmetry, VALUES, SYMMETRY, HIGHER-DIMENSIONAL THEORIES, General Physics and Astronomy, Muon spin spectroscopy, Omega, STRINGS, INVARIANCE, Standard Model, High Energy Physics - Experiment, High Energy Physics - Phenomenology, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, High Energy Physics::Experiment, ANOMALOUS MAGNETIC-MOMENT, SPACED DATA, Spin-½
Abstract

The spin precession frequency of muons stored in the $(g-2)$ storage ring has been analyzed for evidence of Lorentz and CPT violation. Two Lorentz and CPT violation signatures were searched for: a nonzero $\Delta\omega_{a}$ (=$\omega_{a}^{\mu^{+}}-\omega_{a}^{\mu^{-}}$); and a sidereal variation of $\omega_{a}^{\mu^{\pm}}$. No significant effect is found, and the following limits on the standard-model extension parameters are obtained: $b_{Z} =-(1.0 \pm 1.1)\times 10^{-23}$ GeV; $(m_{\mu}d_{Z0}+H_{XY}) = (1.8 \pm 6.0 \times 10^{-23})$ GeV; and the 95% confidence level limits $\check{b}_{\perp}^{\mu^{+}}< 1.4 \times 10^{-24}$ GeV and $\check{b}_{\perp}^{\mu^{-}} < 2.6 \times 10^{-24}$ GeV., Comment: 5 pages, 3 figures, submitted to Physical Review Letters, Modified to answer the referees suggestions

Published
2008

41. Leptonic and Charged Kaon Decay Modes of theϕMeson Measured in Heavy-Ion Collisions at the CERN Super Proton Synchrotron

Author

Axel Maas, K. Filimonov, Y. Panebrattsev, S. Shimansky, J.P. Wurm, D. Antonczyk, Pavel Rehak, J. P. Wessels, J. Rak, S. Damjanovic, J. Holeczek, Ana Maria Marin, Peter Glassel, I. Ravinovich, Michal Sumbera, G. Hering, H. Tilsner, C. Garabatos, G. Agakichiev, Peter Braun-Munzinger, Jovan Milosevic, G. Tsiledakis, H. Appelshäuser, V. I. Yurevich, K. Fomenko, V. Petráček, L. Dietrich, V. Kushpil, S. Esumi, I. Tserruya, T. Wienold, Jurgen Schukraft, O. Petchenova, Dagmar Adamová, W. Schmitz, R. Ortega, Johanna Stachel, V. Belaga, Z. Fraenkel, A. Drees, G. Krobath, Hiroyuki Sako, A. Cherlin, W. Ludolphs, D. Miśkowiec, Jana Bielcikova, Oliver Busch, S. Yurevich, S. Sedykh, S. Radomski, and Thomas Dietel

Subjects
Quantum chromodynamics, Physics, Particle physics, Large Hadron Collider, Meson, High Energy Physics::Phenomenology, Hadron, General Physics and Astronomy, Phi meson, Super Proton Synchrotron, Nuclear physics, Yield (chemistry), Nuclear Physics - Experiment, High Energy Physics::Experiment, Rapidity, Nuclear Experiment
Abstract

We report a measurement of $\phi$ meson production in central Pb+Au collisions at E$_{lab}$/A=158 GeV. For the first time in heavy-ion collisions, $\phi$ mesons were reconstructed in the same experiment both in the K$^+$K$^-$ and the dilepton decay channel. Near mid-rapidity, this yields rapidity densities, corrected for production at the same rapidity value, of 2.05 +- 0.14(stat) +- 0.25(syst) and 2.04 +- 0.49(stat)+-{0.32}(syst), respectively. The shape of the measured transverse momentum spectra is also in close agreement in both decay channels. The data rule out a possible enhancement of the $\phi$ yield in the leptonic over the hadronic channel by a factor larger than 1.6 at 95% CL. We report a measurement of $\phi$ meson production in central Pb+Au collisions at E$_{lab}$/A=158 GeV. For the first time in heavy-ion collisions, $\phi$ mesons were reconstructed in the same experiment both in the K$^+$K$^-$ and the dilepton decay channel. Near mid-rapidity, this yields rapidity densities, corrected for production at the same rapidity value, of 2.05 +- 0.14(stat) +- 0.25(syst) and 2.04 +- 0.49(stat)+-{0.32}(syst), respectively. The shape of the measured transverse momentum spectra is also in close agreement in both decay channels. The data rule out a possible enhancement of the $\phi$ yield in the leptonic over the hadronic channel by a factor larger than 1.6 at 95% CL.

Published
2006

42. Final report of the E821 muon anomalous magnetic moment measurement at BNL

Author

E. P. Sichtermann, M. F. Hare, X. Huang, D. W. Hertzog, P. T. Debevec, C. S. Özben, Frederick Gray, L. R. Sulak, O. Rind, A. Yamamoto, A. Lam, I. Logashenko, C. J. G. Onderwater, L. Duong, B. Bousquet, P. von Walter, H. N. Brown, E. P. Solodov, J. M. Paley, S. K. Dhawan, Yuri F. Orlov, M. Sossong, G. T. Danby, I. Kronkvist, Klaus-Peter Jungmann, S. Giron, R. M. Carey, D. Kawall, Yu. M. Shatunov, Masahiko Iwasaki, D. Urner, J. Pretz, Y. Mizumachi, S. Sedykh, T. Qian, F. J. M. Farley, J. P. Miller, M. Grosse-Perdekamp, D. Nikas, C. Timmermans, D.N. Grigoriev, G.V. Fedotovich, G. zu Putlitz, S. I. Redin, V. P. Druzhinin, B. L. Roberts, P. Cushman, Rasmus Larsen, B.I. Khazin, D. Zimmerman, M. Kawamura, H. Deng, G. W. Bennett, D. Winn, C. C. Polly, N.M. Ryskulov, J. Kindem, F. Krienen, R. Prigl, J. Mi, R. McNabb, William Deninger, Wuzheng Meng, Y. Y. Lee, Gerry Bunce, William Morse, M. Deile, P. M. Shagin, Alexei Trofimov, E. Efstathiadis, A. Steinmetz, Yannis K. Semertzidis, A. Grossmann, D. Warburton, Q. Peng, Vernon W. Hughes, and Research unit Nuclear & Hadron Physics

Subjects
Physics, HADRONIC CONTRIBUTIONS, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Muon, Anomalous magnetic dipole moment, G-2 EXPERIMENT, SCATTERING CONTRIBUTION, Hadron, E(+)E(-) ANNIHILATION, ELECTROMAGNETIC INTERACTIONS, Standard deviation, Standard Model, Nuclear physics, BOHR MAGNETONS, BY-LIGHT CONTRIBUTION, High Energy Physics::Experiment, Vacuum polarization, STORAGE-RING MAGNET, PRECISE MEASUREMENT, Anomaly (physics), ELECTROWEAK CORRECTIONS
Abstract

We present the final report from a series of precision measurements of the muon anomalous magnetic moment, a(mu)=(g-2)/2. The details of the experimental method, apparatus, data taking, and analysis are summarized. Data obtained at Brookhaven National Laboratory, using nearly equal samples of positive and negative muons, were used to deduce a(mu)(Expt)=11659208.0(5.4)(3.3)x10(-10), where the statistical and systematic uncertainties are given, respectively. The combined uncertainty of 0.54 ppm represents a 14-fold improvement compared to previous measurements at CERN. The standard model value for a(mu) includes contributions from virtual QED, weak, and hadronic processes. While the QED processes account for most of the anomaly, the largest theoretical uncertainty, approximate to 0.55 ppm, is associated with first-order hadronic vacuum polarization. Present standard model evaluations, based on e(+)e(-) hadronic cross sections, lie 2.2-2.7 standard deviations below the experimental result.

Published
2006

43. Event-by-event fluctuations at SPS

Author

Michal Sumbera, J. Rak, V. Kushpil, H. Appelshäuser, Y. Panebrattsev, J.P. Wurm, D. Miśkowiec, V. I. Yurevich, Johanna Stachel, Alexander Milov, Jurgen Schukraft, S. Shimansky, I. Ravinovich, I. Tserruya, Axel Maas, L. Dietrich, Pavel Rehak, Z. Fraenkel, A. Castillo, Jovan Milosevic, K. Fomenko, S. Damjanović, Hiro Sako, Bernd Stefan Windelband, W. Schmitz, Andreas Pfeiffer, A. Drees, Peter Glassel, Peter Braun-Munzinger, C. Garabatos, S. Yurevich, T. Wienold, J. Slívová, H. Sako, Ana Maria Marin, H. Tilsner, S. I. Esumi, W. Ludolphs, B. Lenkeit, V. Petracek, V. V. Belaga, S. Sedykh, Johannes Peter Wessels, Wei Xie, K. Filimonov, G. Agakichiev, Dagmar Adamová, A. Cherlin, T. Dietel, O. Petchenova, J. Holeczek, and G. Hering

Subjects
Physics, Nuclear and High Energy Physics, Nuclear Theory, FOS: Physical sciences, Charge (physics), Nuclear physics, Cascade, Transverse momentum, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), Centrality, Nuclear Experiment, Event (particle physics), Beam energy
Abstract

Results on event-by-event fluctuations of the mean transverse momentum and net charge in Pb-Au collisions, measured by the CERES Collaboration at CERN-SPS, are presented. We discuss the centrality and beam energy dependence and compare our data to cascade calculations., Comment: 4 pages, 4 figures, proceedings to INPC2004 Goteborg, Sweden

Published
2004
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44. Event-by-event fluctuations of the mean transverse momentum in 40, 80, and 158 A GeV/c Pb-Au collisions

Author

A. Pfeiffer, M. Sumbera, W. Schmitz, V. Belaga, M. Richter, C. Garabatos, S. Sedykh, Jovan Milosevic, I. Tserruya, Peter Braun-Munzinger, O. Petchenova, G. Hering, A. Cherlin, P. Glässel, S. Yurevich, A. Drees, J. P. Wessels, H. J. Specht, D. Miskowiec, S. Shimansky, H. Sako, J. Rak, J. Schukraft, Alexander Milov, P. Rehak, R. Campagnolo, L. Musa, A. Castillo, T. Dietel, S. Damjanovic, D. Adamová, W. Ludolphs, J. Slívová, T. Wienold, B. Windelband, S.I. Esumi, L. Dietrich, W. Xie, K. Filimonov, Y. Panebrattsev, J.P. Wurm, V. Petrácek, A. Sharma, Axel Maas, Johanna Stachel, K. Fomenko, Z. Fraenkel, B. Lenkeit, V. Yurevich, H. Tilsner, A. Marín, G. Agakichiev, I. Ravinovich, H. Appelshäuser, V. Kushpil, W. Seipp, and J. Holeczek

Subjects
Nuclear reaction, Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Particle physics, Extrapolation, FOS: Physical sciences, Charged particle, Nuclear physics, Critical point (thermodynamics), Quantum field theory, Multiplicity (chemistry), Nuclear Experiment (nucl-ex), Nuclear Experiment, Phase diagram
Abstract

Measurements of event-by-event fluctuations of the mean transverse momentum in Pb-Au collisions at 40, 80, and 158 A GeV/c are presented. A significant excess of mean p_T fluctuations at mid-rapidity is observed over the expectation from statistically independent particle emission. The results are somewhat smaller than recent measurements at RHIC. A possible non-monotonic behaviour of the mean p_T fluctuations as function of collision energy, which may have indicated that the system has passed the critical point of the QCD phase diagram in the range of mu_B under investigation, has not been observed. The centrality dependence of mean p_T fluctuations in Pb-Au is consistent with an extrapolation from pp collisions assuming that the non-statistical fluctuations scale with multiplicity. The results are compared to calculations by the RQMD and UrQMD event generators., 28 pages, 10 figures

Published
2003

45. Universal Pion Freeze-Out in Heavy-Ion Collisions

Author

V. Yurevich, V. Petracek, L. Dietrich, S. Yurevich, J. Schukraft, H. J. Specht, S. I. Esumi, S. Damjanovic, H. Tilsner, J. Slivova, S. Sedykh, I. Ravinovich, A. Marin, P. Glässel, I. Tserruya, K. Fomenko, H. Appelshäuser, A. Castillo, H. Sako, K. Filimonov, Z. Fraenkel, W. Ludolphs, A. Cherlin, Jovan Milosevic, P. Braun-Munzinger, O. Petchenova, J. Stachel, T. Dietel, B. Lenkeit, A. Drees, A. Milov, T. Wienold, Wenhui Xie, Andreas Pfeiffer, G. Agakichiev, G. Hering, B. Windelband, D. Miskowiec, J. Holeczek, Y. Panebrattsev, V. Kushpil, J.P. Wurm, C. Garabatos, J. Rak, D. Adamova, V. Belaga, W. Schmitz, P. Rehak, A. Maas, J. P. Wessels, M. Sumbera, and S. Shimansky

Subjects
Physics, Particle physics, Meson, Mean free path, Nuclear Theory, Hadron, FOS: Physical sciences, General Physics and Astronomy, Elementary particle, Alternating Gradient Synchrotron, Nuclear physics, Pion, Path length, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment, Relativistic Heavy Ion Collider
Abstract

Based on an evaluation of data on pion interferometry and on particle yields at mid-rapidity, we propose a universal condition for thermal freeze-out of pions in heavy-ion collisions. We show that freeze-out occurs when the mean free path of pions lambda_f reaches a value of about 1 fm, which is much smaller than the spatial extent of the system at freeze-out. This critical mean free path is independent of the centrality of the collision and beam energy from AGS to RHIC., 5 pages, 3 figures, revised version resubmitted to PRL

Published
2003

46. Pulse height measurements and electron attachment in drift chambers operated with Xe,CO2 mixtures

Author

A Andronic, H Appelshäuser, C Blume, P Braun-Munzinger, D Bucher, O Busch, A.Castillo Ramirez, V Cătănescu, M Ciobanu, H Daues, A Devismes, D Emschermann, O Fateev, C Garabatos, N Herrmann, M Ivanov, T Mahmoud, T Peitzmann, V Petracek, M Petrovici, K Reygers, H Sann, R Santo, R Schicker, S Sedykh, S Shimansky, R.S Simon, L Smykov, H.K Soltveit, J Stachel, H Stelzer, G Tsiledakis, B Vulpescu, J.P Wessels, B Windelband, O Winkelmann, C Xu, O Zaudtke, Yu Zanevsky, and V Yurevich

Subjects
Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Materials science, Detector, Analytical chemistry, Other Fields of Physics, chemistry.chemical_element, FOS: Physical sciences, Electron, Instrumentation and Detectors (physics.ins-det), Oxygen, Quality (physics), chemistry, Electron attachment, Gas chromatography, Instrumentation, Pulse height, Astrophysics::Galaxy Astrophysics
Abstract

We present pulse height measurements in drift chambers operated with Xe,CO2 gas mixtures. We investigate the attachment of primary electrons on oxygen and SF6 contaminants in the detection gas. The measurements are compared with simulations of properties of drifting electrons. We present two methods to check the gas quality: gas chromatography and Fe55 pulse height measurements using monitor detectors., Comment: 19 pages, 16 figures

Published
2003
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47. Resent Results and Current Status of the Muon (g–2) Experiment at BNL

Author

S. I. Redin, G. W. Bennett, B. Bousquet, H. N. Brown, G. Bunce, R. M. Carey, P. Cushman, G. T. Danby, P. T. Debevec, M. Deile, H. Deng, W. Deninger, S. K. Dhawan, V. P. Druzhinin, L. Duong, E. Efstathiadis, F. J. M. Farley, G. V. Fedotovich, S. Giron, F. Gray, D. Grigoriev, M. Grosse-Perdekamp, A. Grossmann, M. F. Hare, D. W. Hertzog, X. Huang, V. W. Hughes, M. Iwasaki, K. Jungmann, D. Kawall, M. Kawamura, B. I. Khazin, J. Kindem, F. Krinen, I. Kronkvist, A. Lam, R. Larsen, Y. Y. Lee, I. B. Logashenko, R. McNabb, W. Meng, J. Mi, J. P. Miller, W. M. Morse, D. Nikas, C. J. G. Onderwater, Yu. F. Orlov, C. Ozben, J. Paley, Q. Peng, J. Pretz, R. Prigl, G. zu Putlitz, T. Qian, O. Rind, B. L. Roberts, N. M. Ryskulov, P. Shagin, S. Sedykh, Y. K. Semertzidis, Yu. M. Shatunov, E. P. Solodov, E. P. Sichtermann, M. Sossong, A. Steinmetz, L. R. Sulak, C. Timmermans, A. Trofimov, D. Urner, P. von Walter, D. Warburton, D. Winn, A. Yamamoto, and D. Zimmerman

Published
2003

48. Beam energy and centrality dependence of two-pion Bose-Einstein correlations at SPS energies

Author

D. Adamová, G. Agakichiev, H. Appelshäuser, V. Belaga, P. Braun-Munzinger, R. Campagnolo, A. Castillo, A. Cherlin, S. Damjanović, T. Dietel, L. Dietrich, A. Drees, S.I. Esumi, K. Filimonov, K. Fomenko, Z. Fraenkel, C. Garabatos, P. Glässel, G. Hering, J. Holeczek, V. Kushpil, B. Lenkeit, W. Ludolphs, A. Maas, A. Marĺn, J. Milošević, A. Milov, D. Miśkowiec, L. Musa, Yu. Panebrattsev, O. Petchenova, V. Petráček, A. Pfeiffer, J. Rak, I. Ravinovich, P. Rehak, M. Richter, H. Sako, W. Schmitz, J. Schukraft, S. Sedykh, W. Seipp, A. Sharma, S. Shimansky, J. Slĺvová, H.J. Specht, J. Stachel, M. Šumbera, H. Tilsner, I. Tserruya, J.P. Wessels, T. Wienold, B. Windelband, J.P. Wurm, W. Xie, S. Yurevich, and V.V. Yurevich

Subjects
Physics, Nuclear and High Energy Physics, Nuclear Theory, FOS: Physical sciences, Bose–Einstein correlations, Radius, Function (mathematics), Collision, Nuclear physics, Interferometry, Pion, Thermal, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), Centrality, Nuclear Experiment
Abstract

Results are presented of a two-pion interferometry (HBT) analysis in Pb+Au collisions at 40, 80, and 158 AGeV. A detailed study of the Bertsch-Pratt HBT radius parameters has been performed as function of the mean pair transverse momentum $k_t$ and in bins of the centrality of the collision. From these results we extract model dependent information about the space-time evolution of the reaction. An investigation of the effective volume of the pion emitting system provides an important tool to study the properties of thermal pion freeze-out., 24 pages, 16 figures, submitted to Nucl.Phys.A; minor changes as proposed by the referees: two short comments added, figure 6 caption changed, english style reviewed, references updated

Published
2003

49. Status of the ion electron emission microscope at the SIRAD single event facility

Author

J. Wyss, Andrea Candelori, S. Sedykh, Riccardo Rando, A. Kaminski, M. Tessaro, M. Nigro, Piero Giubilato, Dario Bisello, Devis Pantano, and M. Dal Maschio

Subjects
Physics, Nuclear and High Energy Physics, Microscope, Ion beam, business.industry, Detector, Electron, Particle detector, Ion, law.invention, Optics, Data acquisition, law, Microscopy, Atomic physics, business, Instrumentation
Abstract

The SIRAD facility at the 15 MV Tandem accelerator of the INFN Legnaro Laboratory is dedicated to characterizing the global sensitivity of electronic devices and systems to single event effects (SEE) due to energetic ion impacts. We are extending the SEE study program to include ion electron emission microscopy capabilities. The prototype system, on standby for installation on the ion beam line, is working in a photon electron emission microscopy configuration to test the basic detector and acquisition system here described.

Published
2003

50. Prototype tests for the ALICE transition radiation detector

Author

R.S. Simon, S. Sedykh, A. Reischl, Tariq Mahmoud, A. Devismes, C. Xu, Johannes Peter Wessels, Johanna Stachel, T. Lister, H. Stelzer, Christoph Blume, H. Appelshäuser, N. Herrmann, H. Daues, Anton Andronic, R. Santo, G. Catanescu, Klaus Johannes Reygers, R. Schulze, T. Peitzmann, Mihai Petrovici, Ch. Finck, O. Winckelmann, Peter Braun-Munzinger, and M. Ciobanu

Subjects
Physics::Computational Physics, Physics, Particle physics, Large Hadron Collider, Meson, Physics::Instrumentation and Detectors, Particle detector, Nuclear physics, Momentum, Transition radiation detector, Pion, Radiator (engine cooling), High Energy Physics::Experiment, ALICE (propellant), Nuclear Experiment
Abstract

A Transition Radiation Detector (TRD) has been designed to improve the electron identification and trigger capability of the ALICE experiment at the Large Hadron Collider (LHC) at CERN. We present results from tests of a prototype of the TRD concerning pion rejection for different methods of analysis over a momentum range from 0.9 to 2.4 GeV/c. We investigate the performance of different radiator types, composed of foils, fibres and foams.

Published
2002

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