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Single spin asymmetry A<sub>N</sub> in polarized proton-proton elastic scattering at s=200 GeV
STAR Collaboration,Adamczyk, L.,Agakishiev, G.,Aggarwal, M.M.,Ahammed, Z.,Alakhverdyants, A.V.,Alekseev, I.,Alford, J.,Anson, C.D.,Arkhipkin, D.,Aschenauer, E.,Averichev, G.S.,Balewski, J.,Banerjee, A North-Holland Pub. Co 2013 Physics letters: B Vol.719 No.1
We report a high precision measurement of the transverse single spin asymmetry A<SUB>N</SUB> at the center of mass energy s=200 GeV in elastic proton-proton scattering by the STAR experiment at RHIC. The A<SUB>N</SUB> was measured in the four-momentum transfer squared t range 0.003≤|t|≤0.035 (GeV/c)<SUP>2</SUP>, the region of a significant interference between the electromagnetic and hadronic scattering amplitudes. The measured values of A<SUB>N</SUB> and its t-dependence are consistent with a vanishing hadronic spin-flip amplitude, thus providing strong constraints on the ratio of the single spin-flip to the non-flip amplitudes. Since the hadronic amplitude is dominated by the Pomeron amplitude at this s, we conclude that this measurement addresses the question about the presence of a hadronic spin flip due to the Pomeron exchange in polarized proton-proton elastic scattering.
ONTOS OF THE TOPOS : ARCHETYPES OF URBAN CULTURE
A. M. Alekseev-Apraksin 경북대학교 인문학술원 2018 동서인문 Vol.0 No.9
도시는 세계 역사에 나타난 특별한 현상이다. 신석기 혁명 이래로 도시는 인공적인 환경을 만들어내려고 시도했고 그 시도는 다소 성공을 거두었다. 이것이 바로 도시가 인류문화에 기여한 역할이다. 도시화는 막대한 인적 자원을 동원하면서 그것이 진행되는 곳 어디에서나 자연과 소외되는 문화를 만들어냈다. 한편 도시는 또한 도시 주변의 방대한 지역에 중대한 영향을 미치고 흩어져 있던 독특한 특색들을 단일한 현상으로 축적하고 통합하면서 민족문화를 대표해왔다. 우리가 문화를 “자유의지를 지닌 1인칭 주체가 구현한 인간 활동” 같은 것으로 정의한다면 도시 문화의 궁극적인 토대는 다음 3가지가 될 것이다. 정신 물리학적인 생존 방식 모색, 특정한 기호학 체계를 창출하기 위한 더 나은 소통 방식 모색과 상징적 교환 기술 개발, 자아실현 방식과 초월적 실제가 그것이다. 이 글의 목적은 이러한 토대들과 도시 문화에 나타나는 3가지 전형적 차원들, 곧 “테크노-토포스”, “미디어-토포스”, “히에로-토포스”의 상관관계를 설정하는 데 있다. 우리가 도시 생활의 현대적 변화를 장기지속의 관점(이를테면 페르낭브로델의)에서 살펴볼 수 있게 된 것은 이제까지 밝혀진 도시 문화의 주요 차원들(원초적이고 안정적이며 보편적인 성격) 덕분이다. “새로운 고대”, “현대 노마디즘”, “도시 브랜드”, “스마트 시티”, “인터 타운” 등의 몇 가지 사례들은 전 세계적으로 도시 인구가 급증하는 가운데 도시 문화가 향후 어떻게 발전하게 될지 전망해보고 현대 도시 거주민들이 어떤 문제들을 안고 있는지를 가늠해보는 데 도움을 줄 것이다. Towns are a special phenomenon in the world history. Their role in the human culture was, since the ages of Neolithic revolution, strongly related to the more or less successful attempts to create some artificial environment. Taking hold of huge human resources, urbanization everywhere ultimately led culture to alienation from nature. In the meanwhile, culturology and general history allow us to suggest that towns, as playing decisive role for vast regions around them, have always been representatives of national cultures, accumulating and integrating all the dispersed distinctive features into a single phenomenon. If we define culture as some “motivated human activity realized by a free-willed subject in the first person” then the ultimate foundations of any urban culture will be these: 1. A search for ways to survive and recover psychophysically; 2. Looking for better communication and cultivating the skills of symbolic exchange leading to specific semiotic systems; 3. Ways of self-realization and transcendental practices. This article establishes a correlation between these and the three archetypical dimensions in urbanistic cultures, looking upon a town as a “techno-topos”, “media-topos” and “hiero-topos”. These principal dimensions of the urban culture, being brought to light, enable the author (thanks to their primordial, stable and universal character) to look upon contemporary transformations in the urban life from the point of view of la longue durée (cf. F.Braudel). A number of examples (“the New Archaic”, “contemporary nomadism”, a “town-brand”, a “smart city”, an “inter-town” etc.) help to demonstrate the problems of contemporary city dwellers and point out the prospects of towns cultural development amidst the urban population global increase.
МЕТАКУЛЬТУРНЫЙ ДИСКУРС: режимы производства значений
Алексеев-Апраксин Анатолий Михайлович(A.M. Alekseev-Apraksin),Морина Лариса Павловна(L.P. Morina) 경북대학교 러시아-유라시아 연구소 2020 러시아유라시아연구 Vol.4 No.1
The article is dedicated to the philosophical and cultural analysis of the modern meta cultural discourse. The authors draw attention to the heuristic potential of studies that consider intercultural communication as an interaction mediated by signs. They show that communication passes through the prism of a particular culture and society, therefore, the meanings of the same sign vary. It brings forth a number of problems pertaining to the interaction of cultures, often accompanied by a mismatch of thesauri and cultural codes, difficulties in concepts translating, as well as the dependence of the meaning production on interpretation and context. The article summarizes variants for using the term discourse in scholarly literature and focuses on understanding discourse as a system of meanings transmitted by language. It opens up perspectives for analyzing the essence and technologies of language manipulation used in global media discourses. Basing on theoretical conclusions and specific examples, the authors substantiate the thesis that language is not only a means of communication but also the most important instrument of power in modern society. In conclusion, it is inferred that the concept of discourse is important for a productive study of the contemporary multicultural world.
Energy Dependence of Moments of Net-Proton Multiplicity Distributions at RHIC
Adamczyk, L.,Adkins, J. K.,Agakishiev, G.,Aggarwal, M. M.,Ahammed, Z.,Alekseev, I.,Alford, J.,Anson, C. D.,Aparin, A.,Arkhipkin, D.,Aschenauer, E. C.,Averichev, G. S.,Balewski, J.,Banerjee, A.,Barnovs American Physical Society 2014 Physical Review Letters Vol.112 No.3
<P>The first experimental study is presented of a corrugated wall device that uses wakefields to remove a linear energy correlation in a relativistic electron beam (a “dechirper”). Time-resolved measurements of both longitudinal and transverse wakefields of the device are presented and compared with simulations. This study demonstrates the feasibility to employ a dechirper for precise control of the beam phase space in the next generation of free-electron-lasers.</P>
Adamczyk, L.,Adkins, J. K.,Agakishiev, G.,Aggarwal, M. M.,Ahammed, Z.,Alekseev, I.,Aparin, A.,Arkhipkin, D.,Aschenauer, E. C.,Attri, A.,Averichev, G. S.,Bai, X.,Bairathi, V.,Bellwied, R.,Bhasin, A.,Bh American Physical Society 2016 Physical review. C Vol.94 No.3
<P>We present measurements of second-order azimuthal anisotropy (v(2)) at midrapidity (vertical bar y vertical bar < 1.0) for light nuclei d, t, He-3 (for root s(NN) = 200, 62.4, 39, 27, 19.6, 11.5, and 7.7 GeV) and antinuclei <(d)over bar> (root s(NN) = 200, 62.4, 39, 27, and 19.6 GeV) and (3)(He) over bar (root s(NN) = 200 GeV) in the STAR (Solenoidal Tracker at RHIC) experiment. The v(2) for these light nuclei produced in heavy-ion collisions is compared with those for p and (p) over bar. We observe mass ordering in nuclei v(2)(p(T)) at low transverse momenta (p(T) < 2.0 GeV/c). We also find a centrality dependence of v(2) for d and <(d)over bar>. The magnitude of v(2) for t and He-3 agree within statistical errors. Light-nuclei v(2) are compared with predictions from a blast-wave model. Atomic mass number (A) scaling of light-nuclei v(2)(p(T)) seems to hold for p(T)/A < 1.5 GeV/c. Results on light-nuclei v(2) from a transport-plus-coalescence model are consistent with the experimental measurements.</P>
Structural Design of the KSTAR Central Solenoid Structure
사정우,A. Arneman,A. Alekseev,C. H. Choi,D. P. Ivanov,H. K. Park,H. T. Kim,박주식,K. H. Hong 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
The KSTAR central solenoid (CS) coils consist of 4 pairs of superconducting coils, which have updown symmetry and a set of structure with electrical insulation. The structure gives pre-compression in a vertical direction on the coil stack to sustain the contact between coils. The CS structure has the important design requirement that it should protect the CS coils from electromagnetic and thermal loads. The space inside the CS coil has complicated components such as long coil leads and cooling lines and there are many limits in designing the supports. Thus, in order to solve the interference problem between other structural components, a design for the CS structure has been proposed. Also structural analysis has been performed to verify the structural integrity.
Search for the rare decay of ψ(3686)→Λc+p¯e+e−+c.c. at BESIII
Ablikim, M.,Achasov, M. N.,Ahmed, S.,Albrecht, M.,Alekseev, M.,Amoroso, A.,An, F. F.,An, Q.,Bai, J. Z.,Bai, Y.,Bakina, O.,Baldini Ferroli, R.,Ban, Y.,Begzsuren, K.,Bennett, D. W.,Bennett, J. V.,Berger American Physical Society 2018 Physical review. D Vol.97 No.9
<P>Based on a data sample of (448.1 +/- 2.9) x 10(6)Psi(3686) decays collected with the BESIII experiment, a search for the flavor changing neutral current transition Psi(3686) -> Lambda(+)(c) pe(+) e(-) + c.c. is performed for the first time. No signal candidates are observed and the upper limit on the branching fraction of Psi(3686) -> Lambda(+)(c) pe(+) e(-) is determined to be 1.7 x 10(-6) at the 90% confidence level. The result is consistent with expectations from the standard model, and no evidence for new physics is found.</P>
Adam, J.,Adamczyk, L.,Adams, J.R.,Adkins, J.K.,Agakishiev, G.,Aggarwal, M.M.,Ahammed, Z.,Ajitanand, N.N.,Alekseev, I.,Anderson, D.M.,Aoyama, R.,Aparin, A.,Arkhipkin, D.,Aschenauer, E.C.,Ashraf, M.U.,A North-Holland Pub. Co 2018 Physics letters. Section B Vol.786 No.-
<P><B>Abstract</B></P> <P>We present a measurement of inclusive J / ψ production at mid-rapidity ( | y | < 1 ) in p + p collisions at a center-of-mass energy of s = 200 GeV with the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The differential production cross section for J / ψ as a function of transverse momentum ( <SUB> p T </SUB> ) for 0 < <SUB> p T </SUB> < 14 GeV / c and the total cross section are reported and compared to calculations from the color evaporation model and the non-relativistic Quantum Chromodynamics model. The dependence of J / ψ relative yields in three <SUB> p T </SUB> intervals on charged-particle multiplicity at mid-rapidity is measured for the first time in p + p collisions at s = 200 GeV and compared with that measured at s = 7 TeV, PYTHIA8 and EPOS3 Monte Carlo generators, and the Percolation model prediction.</P>
J / ψ polarization in p + p collisions at s = 200 GeV in STAR
Adamczyk, L.,Adkins, J.K.,Agakishiev, G.,Aggarwal, M.M.,Ahammed, Z.,Alekseev, I.,Alford, J.,Anson, C.D.,Aparin, A.,Arkhipkin, D.,Aschenauer, E.C.,Averichev, G.S.,Balewski, J.,Banerjee, A.,Barnovska, Z North-Holland Pub. Co 2014 Physics letters. Section B Vol.739 No.-
<P><B>Abstract</B></P> <P>We report on a polarization measurement of inclusive J / ψ mesons in the di-electron decay channel at mid-rapidity at 2 < <SUB> p T </SUB> < 6 GeV / c in p + p collisions at s = 200 GeV . Data were taken with the STAR detector at RHIC. The J / ψ polarization measurement should help to distinguish between different models of the J / ψ production mechanism since they predict different <SUB> p T </SUB> dependences of the J / ψ polarization. In this analysis, J / ψ polarization is studied in the helicity frame. The polarization parameter <SUB> λ θ </SUB> measured at RHIC becomes smaller towards high <SUB> p T </SUB> , indicating more longitudinal J / ψ polarization as <SUB> p T </SUB> increases. The result is compared with predictions of presently available models.</P>
Observation of the antimatter helium-4 nucleus
Agakishiev, H.,Aggarwal, M. M.,Ahammed, Z.,Alakhverdyants, A. V.,Alekseev, I.,Alford, J.,Anderson, B. D.,Anson, C. D.,Arkhipkin, D.,Averichev, G. S.,Balewski, J.,Beavis, D. R.,Behera, N. K.,Bellwied, Nature Publishing Group, a division of Macmillan P 2011 Nature Vol.473 No.7347
High-energy nuclear collisions create an energy density similar to that of the Universe microseconds after the Big Bang; in both cases, matter and antimatter are formed with comparable abundance. However, the relatively short-lived expansion in nuclear collisions allows antimatter to decouple quickly from matter, and avoid annihilation. Thus, a high-energy accelerator of heavy nuclei provides an efficient means of producing and studying antimatter. The antimatter helium-4 nucleus (), also known as the anti-慣 (), consists of two antiprotons and two antineutrons (baryon number B = ??4). It has not been observed previously, although the 慣-particle was identified a century ago by Rutherford and is present in cosmic radiation at the ten per cent level. Antimatter nuclei with B??<????1 have been observed only as rare products of interactions at particle accelerators, where the rate of antinucleus production in high-energy collisions decreases by a factor of about 1,000 with each additional antinucleon. Here we report the observation of , the heaviest observed antinucleus to date. In total, 18 counts were detected at the STAR experiment at the Relativistic Heavy Ion Collider (RHIC; ref. 6) in 10<SUP>9</SUP> recorded gold-on-gold (Au+Au) collisions at centre-of-mass energies of 200??GeV and 62??GeV per nucleon??nucleon pair. The yield is consistent with expectations from thermodynamic and coalescent nucleosynthesis models, providing an indication of the production rate of even heavier antimatter nuclei and a benchmark for possible future observations of in cosmic radiation.