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NANOSYSTEMS: PHYSICS, APPLICATIONS, PERSPECTIVES V.O. Nesterenko BLTP, JINR, Dubna, Moscow region, Russia A brief review of some basic nanosystems is proposed. Atomic clusters, quantum dots, carbon nanosystems, quantum transport (including spintronics), topological insulators, opticallattices, quantumoptimalcontrol, andBose-Einsteincondensatesarecovered. The main points of interest for fundamental physics and practical applications are sketched. Possible crossovers with nuclear physics are discussed. 100
QUARK AND HADRON DEGREES OF FREEDOM IN THE ROPER RESONANCE ELECTROPRODUCTION I.T. Obukhovsky † Instutute of Nuclear Physics, Moscow State University, 119991, Moscow, Russia † E-mail: obukh@nucl-th.sinp.msu.ru We suggested [1] a two-component model of the lightest nucleon resonance R = N 1/2 +(1440) as a combined state of the quark configuration sp 2 [3] X and the hadron molecule component N + σ. This approach allows to describe with reasonable accuracy the recent CLAS electroproduction data [2] at low- and moderate values of Q 2 with 0≤ Q 2 1.5 – 2 GeV 2 . In the model the R → N + (ππ) I=0 Swave transition process is interpreted as the decay of a virtual σ meson in the N + σ component. The calculated decay width Γ R→Nσ(ππ) correlates well with the PDG value and the recent CB-ELSA and A2-TAPS data [3]. The weight ≈ 0.36 of the N+σ component in the Roper is compatible with the CLAS data at low and moderate Q 2 . This weight is also compatible with the value of the helicity amplitude A 1/2 at the real photon point. However, our evaluations have shown that at low Q 2 the contribution of the pion cloud to the amplitude A 1/2 can be considerable (see e.g. [4]). For example, this is evident from comparison of our results with the data in low-Q 2 region. The discrepancy of our results and the CLAS data is about 1 – 1.5 experimental error bars. Still, this discrepancy is considerably smaller than in the case of previous quark models: the valence quark covariant spectator model [5]) or the LF models [4] in the same region of Q 2 1 GeV 2 /c 2 . In this work we tried to show that the description of transition amplitudes in terms of parton-like models, which are very good at high Q 2 , can be naturally transformed into a description in terms of the ‘soft‘ vector meson cloud at low Q 2 . This smooth transition is achieved by ’switching on’ a non-zero radius of the intermediate vector meson. The vector meson V of finite size generates a non-local Vqq interaction when it is considered in terms of the 3 P 0 model. This weakens the effect of the orthogonality of the spatial R and N wave functions in the low-Q 2 transition matrix element N +γT ∗ → R (the amplitude A 1/2 near the real photon point). A relativistic generalization of our model is in progress. References [1] I.T. Obukhovsky, A. Faessler, D.K. Fedorov, Th. Gutsche, and V.E. Lyubovitskij, Phys. Rev. D84, 014004 (2011). [2] I. G. Aznauryan et al. (CLAS Collaboration), Phys. Rev. C 80, 055203 (2009). [3] A. V. Sarantsev et al. (CB-ELSA and A2-TAPS), Phys. Lett. B 659, 94 (2008). [4] I.G. Aznauryan and V.D. Burkert, Phys. Rev. C85, 055202 (2012). [5] G. Ramalho and K. Tsushima, Phys. Rev. D 81, 074020 (2010). 101
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Joint Institute for Nuclear Researc
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Organized by Joint Institute for Nu
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ON THE CONTINUUM LIMIT OF LANDAU GA
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WITTEN PARAMETER IN THE SU (2)-GLUE
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NEW DATA ON THE DIFFERENTIAL CROSS
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RELATIVISTIC CORRECTION TO THE FIRS
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NEUTRON GENERATION BY RELATIVISTIC
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COMPARISON OF THE TRIGGERS OF THE A
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NUCLEAR TRANSPARENCY EFFECT IN PROT
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Only with the value L σ = 12 of σ
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SELF-SIMILARITY OF HIGH-P T HADRON
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Λ and Σ + (1385) HYPERONS RECONST
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ON RESULTS OF Y-89 IRRADIATION WITH
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TIMELIKE STRUCTURE FUNCTIONS AND HA
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MATHEMATIAL MODEL OF DNA LESIONS O.
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ADIABATIC CHEMICAL FREEZE-OUT AND W
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which, according to the finite widt
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STATUS AND RECENT RESULTS OF THE AT
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experimental errors of about 15 % f
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MEASURING THE PHASE BETWEEN STRONG
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ANALYSIS OF DIFFERENCES ON PSEUDORA
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THE SIGNALS OF PARTIAL RESTORATION
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RECENT HEAVY ION RESULTS FROM STAR
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SPECTROSCOPY AND REGGE TRAJECTORIES
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Page 52 and 53: INFRARED CONFINEMENT AND MESON SPEC
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Page 56 and 57: where A is surface coefficient, B i
Page 58 and 59: MICROSCOPIC PION-NUCLEON AND NUCLEU
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Page 62 and 63: PERTURBATIVE STABILITY OF THE QCD P
Page 64 and 65: OBSERVATION OF LIGHT NUCLEI FORMATI
Page 66 and 67: RESONANCE RESULTS WITH THE ALICE EX
Page 68 and 69: NEUTRAL PION FLUCTUATION STUDIES AT
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Page 80 and 81: DOUBLE PION PRODUCTION IN THE NP AN
Page 82 and 83: DIFFERENTIAL CROSS SECTIONS AND ANA
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Page 86 and 87: ANALYSIS OF THE PION-NUCLEUS ELASTI
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Page 90 and 91: BARYON STRUCTURE IN AdS/QCD V.E. Ly
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Page 96 and 97: DETERMINATION OF FAST NEUTRON SPECT
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Page 108 and 109: DEVELOPMENT OF DYNAMIC MODEL FOR SI
Page 110 and 111: SEARCH FOR DOUBLE PARTONS AT CDF Le
Page 112 and 113: KAON FEMTOSCOPY CORRELATIONS IN Pb-
Page 114 and 115: A NEW APPROACH TO THE THEORY OF ELE
Page 116 and 117: LONGITUDINAL PROFILES, FLUCTUATIONS
Page 118 and 119: ON MANIFESTATION OF QUARK-HADRON DU
Page 120 and 121: COMBINED ANALYSIS OF PROCESSES ππ
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Page 128 and 129: THE DEPENDENCE OF THE NUMBER OF POM
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Page 132 and 133: MODELS OF MIXED QUARK-HADRON MATTER
Page 134 and 135: A SUMMARY OF EXPERIMENTAL RESULTS O
Page 136 and 137: SPATIAL DISTRIBUTION OF NATURAL U F
Page 138 and 139: PSEUDORAPIDITY SPECTRA OF SECONDARY
Page 140: R&D FOR THE PANDA BARREL DIRC Maria
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