Date: Thu, 29 Apr 10 00:04:42 GMT Subject: nucl-th daily 4 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 Tue 27 Apr 10 20:00:00 GMT to Wed 28 Apr 10 20:00:00 GMT ------------------------------------------------------------------------------ \\ arXiv:1004.4954 Date: Wed, 28 Apr 2010 05:23:06 GMT (933kb) Title: Cluster structures of excited states in $^{14}$C Authors: Tadahiro Suhara and Yoshiko Kanada-En'yo Categories: nucl-th Comments: 16 pages, 8 figures Report-no: KUNS-2266 \\ Structures of excited states in $^{14}$C are investigated with a method of $\beta$-$\gamma$ constraint antisymmetrized molecular dynamics in combination with the generator coordinate method. Various excited states with the developed $3\alpha$-cluster core structures are suggested in positive- and negative-parity states. In the positive-parity states, triaxial deformed and linear-chain structures are found to construct excited bands. Interestingly, $^{10}$Be+$\alpha$ correlation is found in the cluster states above the $^{10}$Be+$\alpha$ threshold energy. \\ ( http://arxiv.org/abs/1004.4954 , 933kb) ------------------------------------------------------------------------------ \\ arXiv:1004.5013 Date: Wed, 28 Apr 2010 12:37:58 GMT (108kb) Title: Dissipative relativistic fluid dynamics: a new way to derive the equations of motion from kinetic theory Authors: G.S. Denicol, T. Koide, and D.H. Rischke Categories: nucl-th cond-mat.stat-mech hep-ph Comments: 4 pages, 1 figure \\ We re-derive the equations of motion of dissipative relativistic fluid dynamics from kinetic theory. In contrast to the derivation of Israel and Stewart, which considered the second moment of the Boltzmann equation to obtain equations of motion for the dissipative currents, we directly use the latter's definition. Although the equations of motion obtained via the two approaches are formally identical, the coefficients are different. We show that, for the one-dimensional scaling expansion, our method is in better agreement with the solution obtained from the Boltzmann equation. \\ ( http://arxiv.org/abs/1004.5013 , 108kb) ------------------------------------------------------------------------------ \\ arXiv:1004.5016 Date: Wed, 28 Apr 2010 12:48:58 GMT (185kb) Title: Influence of momentum-dependent interactions on balance energy and mass dependence Authors: Aman D. Sood and Rajeev K. Puri Categories: nucl-th Journal-ref: Eur. Phys. J A 30, 571-577 (2006) \\ We aim to study the role of momentum-dependent interactions in transverse flow as well as in its disappearance. For the present study, central collisions involving mass between 24 and 394 are considered. We find that momentum-dependent interactions have different impact in lighter colliding nuclei compared to heavier colliding nuclei. In lighter nuclei, the contribution of mean field towards the flow is smaller compared to heavier nuclei where binary nucleon-nucleon collisions dominate the scene. The inclusion of momentum-dependent interactions also explains the energy of vanishing flow in $^{12}C+^{12}C$ reaction which was not possible with the static equation of state. An excellent agreement of our theoretical attempt is found for balance energy with experimental data throughout the periodic table. \\ ( http://arxiv.org/abs/1004.5016 , 185kb) ------------------------------------------------------------------------------ \\ arXiv:1004.5027 Date: Wed, 28 Apr 2010 13:31:41 GMT (41kb) Title: A High-Performance Algorithm to Calculate Spin- and Parity-Dependent Nuclear Level Densities Authors: R.A. Sen'kov and M. Horoi Categories: nucl-th Comments: 9 pages, 7 figures \\ A new algorithm for calculating the spin- and parity-dependent shell model nuclear level densities using the moments method in the proton-neutron formalism is presented. A new, parallelized code based on this algorithm was developed and tested using up to 4000 cores for a set of nuclei from the sd-, pf-, and pf + g9/2 - model spaces. By comparing the nuclear level densities at low excitation energy for a given nucleus calculated in two model spaces, such as pf and pf + g9/2, one could estimate the ground state energy in the larger model space, which is not accessible to direct shell model calculations due to the unmanageable dimension. Examples for the ground state energies of for 64Ge and 68Se in the pf + g9/2 model space are presented. \\ ( http://arxiv.org/abs/1004.5027 , 41kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:1003.0700 (*cross-listing*) Date: Tue, 2 Mar 2010 22:39:50 GMT (1356kb,D) Date (revised v2): Tue, 27 Apr 2010 23:04:49 GMT (1175kb,D) Title: Lambda(1520) photoproduciton off the proton target with Regge contributions Authors: Sueng-il Nam, Chung-Wen Kao Categories: hep-ph nucl-th Comments: 19 pages, 27 figures, accepted for publication in Phys.Rev.C. Report-no: CYCU-HEP-10-01 MSC-class: 81V35 \\ We investigate the Lambda(1520,3/2^-)=Lambda* photoproduction off the proton target with the Regge contributions to go beyond the resonance region, in addition to the tree-level Born terms consisting of the s, t, and u channels, and contact term. For this purpose, the Reggeized propagators for the K and K* exchanges in the t channel are employed in a gauge-invariant manner. We also take into account the contribution from a nucleon resonance D_{13}(2030). We compute the angular and energy dependences of the production process, including polarization observables, such as the photon-beam asymmetry and the polarization-transfer coefficients, resulting in good qualitative agreement with current experimental data. It turns out that the Regge contributions are necessary to explain the high-energy data beyond E_{gamma}~4 GeV especially for the angular dependences in the forward-scattering region. On the contrary, the polarization observables are insensitive to the Regge contributions due to the contact-term dominance and gauge invariance. We also compute the K^{-}-angle distribution function in the Gottfried-Jackson frame, using the polarization-transfer coefficients in the z direction. It shows nontrivial theta and E_{gamma} dependences in the forward-scattering region. \\ ( http://arxiv.org/abs/1003.0700 , 1175kb) ------------------------------------------------------------------------------ \\ arXiv:1004.4959 (*cross-listing*) Date: Wed, 28 Apr 2010 06:38:45 GMT (31kb) Title: Higher Moments of Net-proton Multiplicity Distributions at RHIC Authors: M. M. Aggarwal, Z. Ahammed, A. V. Alakhverdyants, I. Alekseev, J. Alford, B. D. Anderson, D. Arkhipkin, G. S. Averichev, J. Balewski, L. S. Barnby, S. Baumgart, D. R. Beavis, R. Bellwied, M. J. Betancourt, R. R. Betts, A. Bhasin, A. K. Bhati, H. Bichsel, J. Bielcik, J. Bielcikova, B. Biritz, L. C. Bland, 3 B. E. Bonner, J. Bouchet, E. Braidot, A. V. Brandin, A. Bridgeman, E. Bruna, S. Bueltmann, I. Bunzarov, T. P. Burton, X. Z. Cai, H. Caines, M. Calder?on de la Barca S?anchez, O. Catu, D. Cebra, R. Cendejas, M. C. Cervantes, Z. Chajecki, P. Chaloupka, S. Chattopadhyay, H. F. Chen, J. H. Chen, J.Y. Chen, J. Cheng, M. Cherney, A. Chikanian, K. E. Choi, W. Christie, P. Chung, R. F. Clarke, M. J. M. Codrington, R. Corliss, J. G. Cramer, H. J. Crawford, D. Das, S. Dash, A. Davila Leyva, L. C. De Silva, et al. (325 additional authors not shown) Categories: nucl-ex hep-ex hep-lat hep-ph nucl-th Comments: 6 pages and 4 figures \\ We report the first measurements of the kurtosis (\kappa), skewness (S) and variance (\sigma^2) of net-proton multiplicity (N_p - N_pbar) distributions at midrapidity for Au+Au collisions at \sqrt(s_NN) = 19.6, 62.4, and 200 GeV corresponding to baryon chemical potentials (\mu_B) between 200 - 20 MeV. Our measurements of the products \kappa \sigma^2 and S \sigma, which can be related to theoretical calculations sensitive to baryon number susceptibilities and long range correlations, are constant as functions of collision centrality. We compare these products with results from lattice QCD and various models without a critical point and study the \sqrt(s_NN) dependence of \kappa \sigma^2. From the measurements at the three beam energies, we find no evidence for a critical point in the QCD phase diagram for \mu_B below 200 MeV. \\ ( http://arxiv.org/abs/1004.4959 , 31kb) ------------------------------------------------------------------------------ \\ arXiv:1004.5055 (*cross-listing*) Date: Wed, 28 Apr 2010 15:10:32 GMT (98kb) Title: Electromagnetic moments of quasi-stable particle Authors: Tim Ledwig, Vladimir Pascalutsa, Marc Vanderhaeghen Categories: hep-ph hep-lat nucl-th Comments: 4 pages, 5 figs Report-no: MKPH-T-10-03 \\ We deal with the problem of assigning electromagnetic moments to a quasi-stable particle (i.e., a particle with mass located at particle's decay threshold). In this case, an application of a small external electromagnetic field changes the energy in a non-analytic way, which makes it difficult to assign definitive moments. On the example of a spin-1/2 field with mass $M_{*}$ interacting with two fields of masses $M$ and $m$, we show how a conventionally defined magnetic dipole moment diverges at $M_{*}=M+m$. We then show that the conventional definition makes sense only when the values of the applied magnetic field $B$ satisfy $|eB|/2M_{*}\ll|M_{*}-M-m|$. We discuss implications of these results to existing studies in electroweak theory, chiral effective-field theory, and lattice QCD. \\ ( http://arxiv.org/abs/1004.5055 , 98kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:nucl-th/0306057 replaced with revised version Wed, 28 Apr 2010 07:45:30 GMT (0kb,I) Title: Disappearance of Flow in Heavy-Ion Collisions for System Mass > 175 Authors: Rajeev K. Puri, Amandeep Sood and J. Aichelin Categories: nucl-th Comments: The paper has been withdrawn \\ ( http://arxiv.org/abs/nucl-th/0306057 , 0kb) ------------------------------------------------------------------------------ \\ arXiv:nucl-th/0306072 replaced with revised version Wed, 28 Apr 2010 07:46:35 GMT (0kb,I) Title: Disappearance of Transverse Flow in Central Heavy Ion Collisions Authors: Amandeep Sood and R.K.Puri Categories: nucl-th Comments: The paper has been withdrawn Journal-ref: DAE-BRNS SYMPOSIUM ON NUCLEAR PHYSICS, December 26-30 (2002) \\ ( http://arxiv.org/abs/nucl-th/0306072 , 0kb) ------------------------------------------------------------------------------ \\ arXiv:1002.2460 (*cross-listing*) replaced with revised version Wed, 28 Apr 2010 08:02:27 GMT (13kb) Title: Electronic bridge process in 229Th^+ Authors: S.G. Porsev and V.V. Flambaum Categories: physics.atom-ph nucl-th Comments: Minor corrections in the text and Table II are made. The reference journal is added. Journal-ref: Phys. Rev. A 81, 042516 (2010) DOI: 10.1103/PhysRevA.81.042516 \\ ( http://arxiv.org/abs/1002.2460 , 13kb) ------------------------------------------------------------------------------ \\ arXiv:1002.4999 replaced with revised version Wed, 28 Apr 2010 15:04:19 GMT (401kb) Title: Directed flow in ultrarelativistic heavy-ion collisions Authors: Piotr Bozek and Iwona Wyskiel Categories: nucl-th Comments: figure added \\ ( http://arxiv.org/abs/1002.4999 , 401kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- 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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