Date: Fri, 27 May 11 00:07:13 GMT Subject: nucl-th daily 6 new + 3 crosses received by eprepget ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ Send any comments regarding submissions directly to submitter. ------------------------------------------------------------------------------ Archives at http://arxiv.org/ To unsubscribe, e-mail To: nucl-th@arXiv.org, Subject: cancel ------------------------------------------------------------------------------ received by eprepget from Wed 25 May 11 20:00:00 GMT to Thu 26 May 11 20:00:00 GMT ------------------------------------------------------------------------------ \\ arXiv:1105.5195 Date: Thu, 26 May 2011 03:33:55 GMT (194kb) Title: Systematic description of 6Li(n, n')6Li* $\to$ d + $\alpha$ reactions with the microscopic coupled-channels method Authors: T. Matsumoto, D. Ichinkhorloo, Y. Hirabayashi, K. Kat\=o, and S. Chiba Categories: nucl-th Comments: 6 pages, 5 figures, submitted to Physical Review C \\ We investigate $^6$Li($n$, $n'$)$^6$Li$^*$ $\to$ $d$ + $\alpha$ reactions by using the continuum-discretized coupled-channels method with the complex Jeukenne-Lejeune-Mahaux effective nucleon-nucleon interaction. In this study, the $^6$Li nucleus is described as a $d$ + $\alpha$ cluster model. The calculated elastic cross sections for incident energies between 7.47 and 24.0 MeV are good agreement with experimental data. Furthermore, we show the neutron spectra to $^6$Li breakup states measured at selected angular points and incident energies can be also reproduced systematically. \\ ( http://arxiv.org/abs/1105.5195 , 194kb) ------------------------------------------------------------------------------ \\ arXiv:1105.5217 Date: Thu, 26 May 2011 07:22:21 GMT (583kb) Title: Structure and direct decay of Giant Monopole Resonances Authors: Beno\^it Avez and C\'edric Simenel Categories: nucl-th Comments: 7 pages, 6 figures \\ We study structure and direct decay of the Giant Monopole Resonance (GMR) using the Time-Dependent Energy-Density-Functional method in the linear response regime in a few doubly-magic nuclei. In these calculations, a proper treatment of the continuum, through the use of large coordinate space, allows for a separation between the nucleus and its emitted nucleons. The microscopic structure of the GMR is investigated with the decomposition of the strength function into individual single-particles quantum numbers. A similar microscopic decomposition of the spectra of emitted nucleons by direct decay of the GMR is performed. Shifting every contribution by the initial sinle-particle energy allows to reconstruct the GMR strength function. The RPA residual interaction couples bound 1-particle 1-hole states to unbound ones, allowing for the total decay of the GMR. \\ ( http://arxiv.org/abs/1105.5217 , 583kb) ------------------------------------------------------------------------------ \\ arXiv:1105.5222 Date: Thu, 26 May 2011 07:54:32 GMT (421kb) Title: Equation of state of the neutron star matter, and the nuclear symmetry energy Authors: Doan Thi Loan, Ngo Hai Tan, Dao T. Khoa, and Jerome Margueron Categories: nucl-th astro-ph.HE nucl-ex Comments: To be published in Physical Review C \\ The nuclear mean-field potentials obtained in the Hartree-Fock method with different choices of the in-medium nucleon-nucleon (NN) interaction have been used to study the equation of state (EOS) of the neutron star (NS) matter. The EOS of the uniform NS core has been calculated for the np$e\mu$ composition in the $\beta$-equilibrium at zero temperature, using version Sly4 of the Skyrme interaction as well as two density-dependent versions of the finite-range M3Y interaction (CDM3Y$n$ and M3Y-P$n$), and versions D1S and D1N of the Gogny interaction. Although the considered effective NN interactions were proven to be quite realistic in numerous nuclear structure and/or reaction studies, they give quite different behaviors of the symmetry energy of nuclear matter at supranuclear densities that lead to the \emph{soft} and \emph{stiff} scenarios discussed recently in the literature. Different EOS's of the NS core and the EOS of the NS crust given by the compressible liquid drop model have been used as input of the Tolman-Oppenheimer-Volkov equations to study how the nuclear symmetry energy affects the model prediction of different NS properties, like the cooling process as well as the gravitational mass, radius, and moment of inertia. \\ ( http://arxiv.org/abs/1105.5222 , 421kb) ------------------------------------------------------------------------------ \\ arXiv:1105.5224 Date: Thu, 26 May 2011 07:57:36 GMT (2866kb) Title: Dynamics in the production of superheavy nuclei in low-energy heavy-ion collisions Authors: Zhao-Qing Feng, Gen-Ming Jin, Jun-Qing Jin Categories: nucl-th Comments: 22 pages, 17 figures Journal-ref: Nucl. Phys. Rev. 28 (2011) 1 \\ We present a review of the recent progress of theoretical models on the description of the formation of superheavy nuclei in collisions of heavy systems. Two sorts of reactions that are the fusion-evaporation mechanism and the massive damped collisions to produce superheavy nuclei are discussed. Problems and further improvements of the capture of colliding partners, the formation of compound nucleus and the de-excitation process are pointed out. Possible combinations in the synthesis of the gap of the cold fusion and $^{48}$Ca induced reactions are proposed by the calculations based on the dinuclear system model and also compared with other approaches. The synthesis of neutron-rich heavy isotopes near sub-shell closure N=162 via transfer reactions in the damped collisions of two actinides and the influence of shell closure on the production of heavy isotopes are investigated. Prospective possibility to reach superheavy nuclei near N=184 via neutron-rich radioactive beams of high intensity in the future is discussed. \\ ( http://arxiv.org/abs/1105.5224 , 2866kb) ------------------------------------------------------------------------------ \\ arXiv:1105.5321 Date: Thu, 26 May 2011 15:14:26 GMT (1366kb) Title: A Comparison between a Minijet Model and a Glasma Flux Tube Model for Central Au-Au Collisions at $\sqrt{s_{NN}}$=200 GeV Authors: Ron S. Longacre Categories: nucl-th Report-no: BNL-95207-2011 \\ In is paper we compare two models with central Au-Au collisions at $\sqrt{s_{NN}}$=200 GeV. The first model is a minijet model which assumes that around $\sim$50 minijets are produced in back-to-back pairs and have an altered fragmentation functions. It is also assumed that the fragments are transparent and escape the collision zone and are detected. The second model is a glasma flux tube model which leads to flux tubes on the surface of a radial expanding fireball driven by interacting flux tubes near the center of the fireball through plasma instabilities. This internal fireball becomes an opaque hydro fluid which pushes the surface flux tubes outward. Around $\sim$12 surface flux tubes remain and fragment with $\sim$1/2 the produced particles escaping the collision zone and are detected. Both models can reproduce two particle angular correlations in the different $p_{t1}$ $p_{t2}$ bins. We also compare the two models for three additional effects: meson baryon ratios; the long range nearside correlation called the ridge; and the so-called mach cone effect when applied to three particle angular correlations. \\ ( http://arxiv.org/abs/1105.5321 , 1366kb) ------------------------------------------------------------------------------ \\ arXiv:1105.5360 Date: Thu, 26 May 2011 17:43:10 GMT (515kb,D) Title: J/Psi dissociation in parity-odd bubbles Authors: Kirill Tuchin Categories: nucl-th hep-ph nucl-ex Comments: 11 pages, 5 figures \\ We calculate the quarkonium dissociation rate in the P and CP-odd domains (bubbles) that were possibly created in heavy-ion collisions. In the presence of the magnetic field produced by the valence quarks of colliding ions, parity-odd domains generate electric field. Quarkonium dissociation is the result of quantum tunneling of quark or antiquark through the potential barrier in this electric field. The strength of the electric field in the quarkonium comoving frame depends on the quarkonium velocity with respect to the background magnetic field. We investigate momentum, electric field strength and azimuthal dependence of the dissociation rate. Azimuthal distribution of quarkonia surviving in the electromagnetic field is strongly anisotropic; the form of anisotropy depends on the relation between the electric and magnetic fields and quarkonium momentum. These features can be used to explore the properties of the electromagnetic field created in heavy ion collisions. \\ ( http://arxiv.org/abs/1105.5360 , 515kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:1105.4990 (*cross-listing*) Date: Wed, 25 May 2011 10:44:59 GMT (10kb) Title: Chiral Inflation of the Pion Radius Authors: I.A. Perevalova, M.V. Polyakov, A.N. Vall, A.A. Vladimirov Categories: hep-ph hep-ex nucl-ex nucl-th Comments: 4 pages \\ We derive expression for the large b_perp asymptotic of the 3D parton distributions q(x,b_perp) in the pion. The asymptotic depends exclusively on the mass scales F_pi and m_pi. Therefore it provides us with a nice example of a strict non-perturbative result for the partonic structure of Nambu-Goldstone bosons in QCD. Analyzing the x-dependent pion transverse radius we reveal a new phenomenon of "chiral inflation"-- in the parametrically wide region of Bjorken x (m_pi^2/(4 pi F_pi)^2 << x << 1) the pion radius grows exponentially fast with the rapidity eta=ln(1/x). We show that the partons in this interval of Bjorken x contribute to famous logarithmic divergency of the pion radius. In other words, the partonic picture of the classical result of ChPT is provided. The phenomenon of the chiral inflation is at variance with the Gribov diffusion, because of long-range interaction of the Nambu-Goldstone bosons. \\ ( http://arxiv.org/abs/1105.4990 , 10kb) ------------------------------------------------------------------------------ \\ arXiv:1105.5193 (*cross-listing*) Date: Thu, 26 May 2011 02:57:25 GMT (201kb) Title: Charged bottomonium-like states $Z_b(10610)$ and $Z_b(10650)$ and the $\Upsilon(5S)\to \Upsilon(2S)\pi^+\pi^-$ decay Authors: Dian-Yong Chen, Xiang Liu and Shi-Lin Zhu Categories: hep-ph hep-ex nucl-ex nucl-th Comments: 4 pages, 4 figures, 3 tables \\ Inspired by the newly observed two charged bottomonium-like states, we consider the possible contribution from the intermediate $Z_b(10610)$ and $Z_b(10650)$ states to the $\Upsilon(5S)\to \Upsilon(2S)\pi^+\pi^-$ decay process, which naturally explains Belle's previous observation of the anomalous $\Upsilon(2S)\pi^+\pi^-$ production near the peak of $\Upsilon(5S)$ at $\sqrt s=10.87$ GeV [K.F. Chen {\it et al}. (Belle Collaboration), Phys. Rev. Lett. {\bf 100}, 112001 (2008)]. The resulting $d\Gamma(\Upsilon(5S)\to \Upsilon(2S)\pi^+\pi^-)/dm_{\pi^+\pi^-}$ and $d\Gamma(\Upsilon(5S)\to \Upsilon(2S)\pi^+\pi^-)/d\cos\theta$ distributions agree with Belle's measurement after inclusion of these $Z_b$ states. This formalism also reproduces the Belle observation of the double-peak structure and its reflection in $\Upsilon(2S)\pi^+$ invariant mass spectrum of $\Upsilon(5S)\to \Upsilon(2S)\pi^+\pi^-$ decay. \\ ( http://arxiv.org/abs/1105.5193 , 201kb) ------------------------------------------------------------------------------ \\ arXiv:1105.5304 (*cross-listing*) Date: Thu, 26 May 2011 14:30:19 GMT (217kb) Title: Effect of collective neutrino flavor oscillations on vp-process nucleosynthesis Authors: G. Mart\'inez-Pinedo, B. Ziebarth, T. Fischer, and K. Langanke Categories: astro-ph.SR hep-ph nucl-th Comments: 4 pages, 3 figures, submitted to Physics Letters B \\ The vp process is a primary nucleosynthesis process which occurs in core collapse supernovae. An essential role in this process is being played by electron antineutrinos. They generate, by absorption on protons, a supply of neutrons which, by (n,p) reactions, allow to overcome waiting point nuclei with rather long beta-decay and proton-capture lifetimes. The synthesis of heavy elements by the vp process depends sensitively on the \bar{\nu}_e luminosity and spectrum. As has been shown recently, the latter are affected by collective neutrino flavor oscillations which can swap the \bar{\nu}_e and \bar{\nu}_{\mu,\tau} spectra above a certain split energy. Assuming such a swap scenario, we have studied the impact of collective neutrino flavor oscillations on the vp-process nucleosynthesis. Our results show that the production of light p-nuclei up to mass number A=108 is very sensitive to collective neutrino oscillations. \\ ( http://arxiv.org/abs/1105.5304 , 217kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:1006.0668 replaced with revised version Thu, 26 May 2011 03:50:29 GMT (78kb) Title: New description of four-body breakup reaction Authors: Takuma Matsumoto, Kiyoshi Kat\=o, and Masanobu Yahiro Categories: nucl-th Comments: 5 pages, 5 figures Journal-ref: Phys.Rev.C82:051602,2010 DOI: 10.1103/PhysRevC.82.051602 \\ ( http://arxiv.org/abs/1006.0668 , 78kb) ------------------------------------------------------------------------------ \\ arXiv:1012.0664 (*cross-listing*) replaced with revised version Thu, 26 May 2011 10:55:41 GMT (819kb) Title: Nonlocal PNJL model beyond mean field and the QCD phase transition Authors: A.E. Radzhabov, D. Blaschke, M. Buballa, M.K. Volkov Categories: hep-ph nucl-th Comments: 16 pages, 19 figures; v3: discussion of the T0 dependence and comparison with lattice data added; version accepted by Phys. Rev. D \\ ( http://arxiv.org/abs/1012.0664 , 819kb) ------------------------------------------------------------------------------ \\ arXiv:1101.4685 replaced with revised version Thu, 26 May 2011 10:58:51 GMT (87kb) Title: Parametrization of light nuclei quasiparticle energy shifts and composition of warm and dense nuclear matter Authors: G. R\"opke Categories: nucl-th \\ ( http://arxiv.org/abs/1101.4685 , 87kb) ------------------------------------------------------------------------------ \\ arXiv:1101.4910 (*cross-listing*) replaced with revised version Wed, 25 May 2011 20:01:30 GMT (198kb) Title: Gluino production in ultrarelativistic heavy ion collisions and nuclear shadowing Authors: C. Brenner Mariotto, D.B. Espindola and M.C. Rodriguez Categories: hep-ph nucl-ex nucl-th Comments: 7 pages, 5 figures; results and discussions changed/added. Accepted for publication in Physical Review C \\ ( http://arxiv.org/abs/1101.4910 , 198kb) ------------------------------------------------------------------------------ \\ arXiv:1104.2102 (*cross-listing*) replaced with revised version Thu, 26 May 2011 09:34:05 GMT (39kb) Title: Precision benchmark calculations for four particles at unitarity Authors: Shahin Bour, Xin Li, Dean Lee, Ulf-G. Mei{\ss}ner, Lubos Mitas Categories: cond-mat.quant-gas hep-lat nucl-th Comments: 23 pages, 7 figures, final version to appear in Phys. Rev. A \\ ( http://arxiv.org/abs/1104.2102 , 39kb) ------------------------------------------------------------------------------ \\ arXiv:1105.1672 (*cross-listing*) replaced with revised version Thu, 26 May 2011 05:48:07 GMT (121kb) Title: Dipion invariant mass distribution of the anomalous $\Upsilon(1S) \pi^{+} \pi^{-}$ and $\Upsilon(2S) \pi^{+} \pi^{-}$ production near the peak of $\Upsilon(10860)$ Authors: Dian-Yong Chen, Jun He, Xue-Qian Li and Xiang Liu Categories: hep-ph hep-ex nucl-th Comments: 5 pages, 3 figures, 3 tables. More references added and typos corrected \\ ( http://arxiv.org/abs/1105.1672 , 121kb) ------------------------------------------------------------------------------ \\ arXiv:1105.2688 replaced with revised version Thu, 26 May 2011 10:14:53 GMT (142kb,D) Title: Consistent interactions for high-spin fermion fields Authors: Tom Vrancx, Lesley De Cruz, Jan Ryckebusch, and Pieter Vancraeyveld Categories: nucl-th Comments: 17 pages, 10 figures MSC-class: 81V35, 81T18 \\ ( http://arxiv.org/abs/1105.2688 , 142kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- For subscribe options to combined physics archives, e-mail To: physics@arXiv.org, Subject: subscribe ----------------------------------------------------------------------------- For help on viewing and making submissions, see http://arXiv.org/help/ For a list of archive mirror sites, see http://arXiv.org/servers.html ----------------------------------------------------------------------------- Third-party submissions cause excessive problems. 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