The increase of luminosity of the SPS beams expected after 2020 allows considering the investigation of rather rare processes. In particular, so-called cumulative particle production can be studied ...in hadron collisions by measurements of secondary particle yields in regions kinematically forbidden for reactions with free nucleons. Such processes could be either a result of hard parton collisions with some large-density multi-quark configuration or of the formation of heavy baryonic resonances. Measurements in the backward hemisphere in fixed target experiment should provide the event-by-event data that could be used, along with those from the forward region, for a correlation analysis, thus resulting in new constraints on models. In this report the preliminary design, ideas, technology and the first GEANT simulations of a proposed new detector are presented and discussed.
The study of open charm meson production provides an efficient tool for the investigation of the properties of hot and dense matter formed in nucleus–nucleus collisions. The interpretation of the ...existing di-muon data from the CERN SPS suffers from a lack of knowledge on the mechanism and properties of the open charm particle production. Due to this, the heavy-ion programme of the NA61/SHINE experiment at the CERN SPS has been extended by precise measurements of charm hadrons with short lifetimes. A new Vertex Detector for measurements of the rare processes of open charm production in nucleus–nucleus collisions was designed to meet the challenges of track registration and high resolution in primary and secondary vertex reconstruction. A small-acceptance version of the vertex detector was installed in 2016 and tested with Pb + Pb collisions at 150
A
GeV
/
c
. It was also operating during the physics data taking on Xe + La and Pb + Pb collisions at 150
A
GeV
/
c
conducted in 2017 and 2018. This paper presents the detector design and construction, data calibration, event reconstruction, and analysis procedure.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
The problem of using the optical potential to describe resonances in elastic scattering reactions is considered. The ambiguity of determining the angular momenta of resonances with a small reduced ...width is shown when comparing the angular distributions obtained with Legendre polynomials. The problem of the influence of the discrete uncertainty of the optical potential parameters on the position of resonances is considered.
The key objective of any enterprise's staff policy is to form a system of providing managers, specialists and workers of mass professions who can solve tasks of future development at a high ...professional level. The volume and timeliness of all work, the efficient use of fixed assets and, as a result, the volume of production, its cost, profit and several other economic indicators depend on the availability of labour resources and the efficiency of their use. The most important social and labour indicators in enterprises are ensuring full employment of labour resources and high labour productivity, creating good working conditions for staff and increasing wages, achieving proper economic growth and quality of life for workers. Labour has a major role to play in realizing these economic objectives. The article analyses the indicators characterizing the level of labour supply of the enterprise, their qualitative composition and the level of labour productivity.
The production of
K
S
0
mesons in inelastic
p+p
collisions at beam momentum 158
GeV
/
c
(
s
NN
=
17.3
GeV
) was measured with the NA61/SHINE spectrometer at the CERN Super Proton Synchrotron. ...Double-differential distributions were obtained in transverse momentum and rapidity. The mean multiplicity of
K
S
0
was determined to be
0.162
±
0.001
(
s
t
a
t
.
)
±
0.011
(
s
y
s
.
)
. The results on
K
S
0
production are compared with model predictions (
EPOS 1.99
, SMASH 2.0, PHSD and UrQMD 3.4 models) as well as with published world data.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
Abstract
A key aspect of rural development is its considerable natural, demographic, economic, historical and cultural potential. Its reasonable, effective and efficient fulfillment can provide ...diversification, full employment, and high living standards in rural settlements. Rural development is a long-term action plan, it is a strategy for the socio-economic development of rural areas. The Strategy of socio-economic development of rural territories is a document defining the priorities, goals and objectives of socio-economic development of rural territories for the long term, corresponding to the priorities, goals and objectives of socio-economic development of rural territories of the Russian Federation and the Republic of Bashkortostan. The given paper discusses the strategy of sustainable rural development in the Republic of Bashkortostan. The work highlights factors hindering the program implementation. These include a manpower shortage, insufficient funding, weak infrastructure and others. There is a brief overview of the current state of the agro-industrial complex in the Republic of Bashkortostan. The study suggests a draft financial support for the municipal program of integrated development by the example of the Ufa district. The authors consider the cause-and-effect relationship between the amount of financing and the pace of rural development.
The absorption spectra have been measured at temperatures of 7.2–300 K of a
-irradiated and UV-exposed LiF crystal with an admixture of oxygen and hydroxyl. The coupling force (
S
) with the phonons ...of the lattice of the electronic–vibrational transition with the zero-phonon line 436.55 nm is determined from the ratio of the intensities of the zero-phonon line and the vibronic absorption band. Based on the value of
S
, the nature of the color center responsible for the absorption band of 390 nm and radiation of 490 nm is proposed.
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.
Thermal cooling performances of extremely lightweight mechanical carbon fiber support structures with an integrated liquid cooling system for monolithic silicon pixel detectors have been ...investigated. The high heat removal efficiency using single-phase liquid flow is shown for a power density up to 0.5 W/cm2. These solutions provide therefore possibility to build a detector with a record radiation length of 0.3% per layer, ensuring considerable extensions of the physical program of investigations of the quark-gluon plasma in ultra-relativistic heavy-ion collisions at the Large Hadron Collider.
The most promising lines of development in nuclear and particle physics are considered. One of these is the synthesis of achievements in nuclear physics and the nano-, bio-, information, cognitive, ...and social sciences to create technologies similar to nature and improve our understanding of humanity (the NBICS paradigm). The second topic is the growing attention to ultrahigh energies of collision and studying such exotic states of matter as quark–gluon plasma. The reports delivered at the 70th conference on nuclear physics in St. Petersburg provide a wide range of material for discussion.
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