94 research outputs found
Засади організації діяльності Державного бюро розслідувань: загальна характеристика
Басараб А. С. Засади організації діяльності Державного бюро розслідувань: загальна характеристика / А. С. Басараб, Д. О. Каптур // Державне бюро розслідувань: на шляху розбудови : матер. Міжнар. наук.-практ. конф. (м. Одеса, 16 червня 2018 р.) / редкол.: Г. О. Ульянова (голова ред.), В. М. Дрьомін, Є. Л. Стрельцов [та ін.] ; НУ "ОЮА". - Одеса : Юридична література, 2018. - С. 84-86
Measurements of production and inelastic cross sections for p+C, p+Be, and p+Al at 60 GeV/c and p+C and p+Be at 120 GeV/c
This paper presents measurements of production cross sections and inelastic cross sections for the
following reactions: 60 GeV=c protons with C, Be, Al targets and 120 GeV=c protons with C and Be
targets. The analysis is performed using the NA61/SHINE spectrometer at the CERN Super Proton
Synchrotron. First measurements are obtained using protons at 120 GeV=c, while the results for protons at
60 GeV=c are compared with previously published measurements. These interaction cross section
measurements are critical inputs for neutrino flux prediction in current and future accelerator-based
long-baseline neutrino experiments.Authors:A. Aduszkiewicz,15 E. V. Andronov,21 T. Antićić,3 V. Babkin,19 M. Baszczyk,13 S. Bhosale,10 A. Blondel,23 M. Bogomilov,2
A. Brandin,20 A. Bravar,23 W. Bryliński,17 J. Brzychczyk,12 M. Buryakov,19 O. Busygina,18 A. Bzdak,13 H. Cherif,6
M. Ćirković,22 M. Csanad,7 J. Cybowska,17 T. Czopowicz,17 A. Damyanova,23 N. Davis,10 M. Deliyergiyev,9 M. Deveaux,6
A. Dmitriev,19 W. Dominik,15 P. Dorosz,13 J. Dumarchez,4 R. Engel,5 G. A. Feofilov,21 L. Fields,24 Z. Fodor,7,16
A. Garibov,1 M. Gaździcki,6,9 O. Golosov,20 M. Golubeva,18 K. Grebieszkow,17 F. Guber,18 A. Haesler,23 S. N. Igolkin,21
S. Ilieva,2 A. Ivashkin,18 S. R. Johnson,26 K. Kadija,3 E. Kaptur,14 N. Kargin,20 E. Kashirin,20 M. Kiełbowicz,10
V. A. Kireyeu,19 V. Klochkov,6 V. I. Kolesnikov,19 D. Kolev,2 A. Korzenev,23 V. N. Kovalenko,21 K. Kowalik,11
S. Kowalski,14 M. Koziel,6 A. Krasnoperov,19 W. Kucewicz,13 M. Kuich,15 A. Kurepin,18 D. Larsen,12 A. László,7
T. V. Lazareva,21 M. Lewicki,16 K. Łojek,12 B. Łysakowski,14 V. V. Lyubushkin,19 M. Maćkowiak-Pawłowska,17
Z. Majka,12 B. Maksiak,11 A. I. Malakhov,19 A. Marchionni,24 A. Marcinek,10 A. D. Marino,26 K. Marton,7 H.-J. Mathes,5
T. Matulewicz,15 V. Matveev,19 G. L. Melkumov,19 A. O. Merzlaya,12 B. Messerly,27 Ł. Mik,13 G. B. Mills,25
S. Morozov,18,20 S. Mrówczyński,9 Y. Nagai ,26 M. Naskręt,16 V. Ozvenchuk,10 V. Paolone,27 M. Pavin,4,3 O. Petukhov,18
R. Płaneta,12 P. Podlaski,15 B. A. Popov,19,4 B. Porfy,7 M. Posiadała-Zezula,15 D. S. Prokhorova,21 D. Pszczel,11
S. Puławski,14 J. Puzović,22 M. Ravonel,23 R. Renfordt,6 E. Richter-Wąs,12 D. Röhrich,8 E. Rondio,11 M. Roth,5
B. T. Rumberger,26 M. Rumyantsev,19 A. Rustamov,1,6 M. Rybczynski,9 A. Rybicki,10 A. Sadovsky,18 K. Schmidt,14
I. Selyuzhenkov,20 A. Yu. Seryakov,21 P. Seyboth,9 M. Słodkowski,17 A. Snoch,6 P. Staszel,12 G. Stefanek,9 J. Stepaniak,11
M. Strikhanov,20 H. Ströbele,6 T. Šuša,3 A. Taranenko,20 A. Tefelska,17 D. Tefelski,17 V. Tereshchenko,19 A. Toia,6
R. Tsenov,2 L. Turko,16 R. Ulrich,5 M. Unger,5 F. F. Valiev,21 D. Veberič,5 V. V. Vechernin,21 A. Wickremasinghe,27
Z.Włodarczyk,9 A.Wojtaszek-Szwarc,9 K. Wójcik,14 O.Wyszyński,12 L. Zambelli,4 E. D. Zimmerman,26 and R. Zwaska24
(NA61/SHINE Collaboration)
1National Nuclear Research Center, Baku, Azerbaijan
2Faculty of Physics, University of Sofia, Sofia, Bulgaria
3Rud¯er Bošković Institute, Zagreb, Croatia
4LPNHE, University of Paris VI and VII, Paris, France
5Karlsruhe Institute of Technology, Karlsruhe, Germany
6University of Frankfurt, Frankfurt, Germany
7Wigner Research Centre for Physics of the Hungarian Academy of Sciences, Budapest, Hungary
8University of Bergen, Bergen, Norway
9Jan Kochanowski University in Kielce, Poland
10Institute of Nuclear Physics, Polish Academy of Sciences, Cracow, Poland
11National Centre for Nuclear Research, Warsaw, Poland
12Jagiellonian University, Cracow, Poland
13AGH—University of Science and Technology, Cracow, Poland
14University of Silesia, Katowice, Poland
15University of Warsaw, Warsaw, Poland
16University of Wrocław, Wrocław, Poland
17Warsaw University of Technology, Warsaw, Poland
18Institute for Nuclear Research, Moscow, Russia
19Joint Institute for Nuclear Research, Dubna, Russia
20National Research Nuclear University (Moscow Engineering Physics Institute), Moscow, Russia
21St. Petersburg State University, St. Petersburg, Russia
22University of Belgrade, Belgrade, Serbia
23University of Geneva, Geneva, Switzerland
24Fermilab, Batavia, Illinois, USA
25Los Alamos National Laboratory, Los Alamos, New Mexico, USA
26University of Colorado, Boulder, Colorado, USA
27University of Pittsburgh, Pittsburgh, Pennsylvania, US
Measurements of , K, p and spectra in proton-proton interactions at 20, 31, 40, 80 and 158 GeV/c with the NA61/SHINE spectrometer at the CERN SPS
Measurements of inclusive spectra and mean multiplicities of ,
K, p and produced in inelastic p+p interactions at
incident projectile momenta of 20, 31, 40, 80 and 158 GeV/c ( 6.3,
7.7, 8.8, 12.3 and 17.3 GeV, respectively) were performed at the CERN Super
Proton Synchrotron using the large acceptance NA61/SHINE hadron spectrometer.
Spectra are presented as function of rapidity and transverse momentum and are
compared to predictions of current models. The measurements serve as the
baseline in the NA61/SHINE study of the properties of the onset of
deconfinement and search for the critical point of strongly interacting matter
Multiplicity and transverse momentum fluctuations in inelastic proton-proton interactions at the CERN Super Proton Synchrotron
Measurements of multiplicity and transverse momentum fluctuations of charged
particles were performed in inelastic p+p interactions at 20, 31, 40, 80 and
158 GeV/c beam momentum. Results for the scaled variance of the multiplicity
distribution and for three strongly intensive measures of multiplicity and
transverse momentum fluctuations \$\Delta[P_{T},N]\$, \$\Sigma[P_{T},N]\$ and
\$\Phi_{p_T}\$ are presented. For the first time the results on fluctuations
are fully corrected for experimental biases. The results on multiplicity and
transverse momentum fluctuations significantly deviate from expectations for
the independent particle production. They also depend on charges of selected
hadrons. The string-resonance Monte Carlo models EPOS and UrQMD do not describe
the data. The scaled variance of multiplicity fluctuations is significantly
higher in inelastic p+p interactions than in central Pb+Pb collisions measured
by NA49 at the same energy per nucleon. This is in qualitative disagreement
with the predictions of the Wounded Nucleon Model. Within the statistical
framework the enhanced multiplicity fluctuations in inelastic p+p interactions
can be interpreted as due to event-by-event fluctuations of the fireball energy
and/or volume.Comment: 18 pages, 12 figure
Measurements of , , , and proton production in proton-carbon interactions at 31 GeV/ with the NA61/SHINE spectrometer at the CERN SPS
Measurements of hadron production in p+C interactions at 31 GeV/c are
performed using the NA61/ SHINE spectrometer at the CERN SPS. The analysis is
based on the full set of data collected in 2009 using a graphite target with a
thickness of 4% of a nuclear interaction length. Inelastic and production cross
sections as well as spectra of , , p, and are
measured with high precision. These measurements are essential for improved
calculations of the initial neutrino fluxes in the T2K long-baseline neutrino
oscillation experiment in Japan. A comparison of the NA61/SHINE measurements
with predictions of several hadroproduction models is presented.Comment: v1 corresponds to the preprint CERN-PH-EP-2015-278; v2 matches the
final published versio
Measurement of negatively charged pion spectra in inelastic p+p interactions at = 20, 31, 40, 80 and 158 GeV/c
We present experimental results on inclusive spectra and mean multiplicities
of negatively charged pions produced in inelastic p+p interactions at incident
projectile momenta of 20, 31, 40, 80 and 158 GeV/c ( 6.3, 7.7,
8.8, 12.3 and 17.3 GeV, respectively). The measurements were performed using
the large acceptance NA61/SHINE hadron spectrometer at the CERN Super Proton
Synchrotron.
Two-dimensional spectra are determined in terms of rapidity and transverse
momentum. Their properties such as the width of rapidity distributions and the
inverse slope parameter of transverse mass spectra are extracted and their
collision energy dependences are presented. The results on inelastic p+p
interactions are compared with the corresponding data on central Pb+Pb
collisions measured by the NA49 experiment at the CERN SPS.
The results presented in this paper are part of the NA61/SHINE ion program
devoted to the study of the properties of the onset of deconfinement and search
for the critical point of strongly interacting matter. They are required for
interpretation of results on nucleus-nucleus and proton-nucleus collisions.Comment: Numerical results available at: https://edms.cern.ch/document/1314605
Updates in v3: Updated version, as accepted for publicatio
Challenges in QCD matter physics - The Compressed Baryonic Matter experiment at FAIR
Substantial experimental and theoretical efforts worldwide are devoted to
explore the phase diagram of strongly interacting matter. At LHC and top RHIC
energies, QCD matter is studied at very high temperatures and nearly vanishing
net-baryon densities. There is evidence that a Quark-Gluon-Plasma (QGP) was
created at experiments at RHIC and LHC. The transition from the QGP back to the
hadron gas is found to be a smooth cross over. For larger net-baryon densities
and lower temperatures, it is expected that the QCD phase diagram exhibits a
rich structure, such as a first-order phase transition between hadronic and
partonic matter which terminates in a critical point, or exotic phases like
quarkyonic matter. The discovery of these landmarks would be a breakthrough in
our understanding of the strong interaction and is therefore in the focus of
various high-energy heavy-ion research programs. The Compressed Baryonic Matter
(CBM) experiment at FAIR will play a unique role in the exploration of the QCD
phase diagram in the region of high net-baryon densities, because it is
designed to run at unprecedented interaction rates. High-rate operation is the
key prerequisite for high-precision measurements of multi-differential
observables and of rare diagnostic probes which are sensitive to the dense
phase of the nuclear fireball. The goal of the CBM experiment at SIS100
(sqrt(s_NN) = 2.7 - 4.9 GeV) is to discover fundamental properties of QCD
matter: the phase structure at large baryon-chemical potentials (mu_B > 500
MeV), effects of chiral symmetry, and the equation-of-state at high density as
it is expected to occur in the core of neutron stars. In this article, we
review the motivation for and the physics programme of CBM, including
activities before the start of data taking in 2022, in the context of the
worldwide efforts to explore high-density QCD matter.Comment: 15 pages, 11 figures. Published in European Physical Journal
NA61/SHINE facility at the CERN SPS: beams and detector system
NA61/SHINE (SPS Heavy Ion and Neutrino Experiment) is a multi-purpose
experimental facility to study hadron production in hadron-proton,
hadron-nucleus and nucleus-nucleus collisions at the CERN Super Proton
Synchrotron. It recorded the first physics data with hadron beams in 2009 and
with ion beams (secondary 7Be beams) in 2011.
NA61/SHINE has greatly profited from the long development of the CERN proton
and ion sources and the accelerator chain as well as the H2 beamline of the
CERN North Area. The latter has recently been modified to also serve as a
fragment separator as needed to produce the Be beams for NA61/SHINE. Numerous
components of the NA61/SHINE set-up were inherited from its predecessors, in
particular, the last one, the NA49 experiment. Important new detectors and
upgrades of the legacy equipment were introduced by the NA61/SHINE
Collaboration.
This paper describes the state of the NA61/SHINE facility - the beams and the
detector system - before the CERN Long Shutdown I, which started in March 2013
- …