Date: Fri, 29 Jan 10 01:00:42 GMT Subject: nucl-ex daily 2 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-ex@arXiv.org, Subject: cancel ------------------------------------------------------------------------------ received by eprepget from Tue 26 Jan 10 21:00:02 GMT to Thu 28 Jan 10 21:00:04 GMT ------------------------------------------------------------------------------ \\ arXiv:1001.5052 Date: Wed, 27 Jan 2010 21:57:12 GMT (85kb) Title: Charged and strange hadron elliptic flow in Cu+Cu collisions at $\sqrt{s_{NN}}$ = 62.4 and 200 GeV Authors: The STAR Collaboration: B. I. Abelev, et al Categories: nucl-ex Comments: 18 pages, 14 figures \\ We present the results of an elliptic flow analysis of Cu+Cu collisions recorded with the STAR detector at 62.4 and 200GeV. Elliptic flow as a function of transverse momentum is reported for different collision centralities for charged hadrons and strangeness containing hadrons $K_{S}^{0}$, $\Lambda$, $\Xi$, $\phi$ in the midrapidity region $|eta|<1.0$. Significant reduction in systematic uncertainty of the measurement due to non-flow effects has been achieved by correlating particles at midrapidity, $|\eta|<1.0$, with those at forward rapidity, $2.5<|\eta|<4.0$. We also present azimuthal correlations in p+p collisions at 200 GeV to help estimating non-flow effects. To study the system-size dependence of elliptic flow, we present a detailed comparison with previously published results from Au+Au collisions at 200 GeV. We observe that $v_{2}$($p_{T}$) of strange hadrons has similar scaling properties as were first observed in Au+Au collisions, i.e.: (i) at low transverse momenta, $p_T<2GeV/c$, $v_{2}$ scales with transverse kinetic energy, $m_{T}-m$, and (ii) at intermediate $p_T$, $2 ppeta' reaction at excess energy of Q = 16.4 MeV Authors: P. Klaja, P. Moskal, E. Czerwinski, R. Czyzykiewicz, A. Deloff, D. Gil, D. Grzonka, L. Jarczyk, B. Kamys, A. Khoukaz, J. Klaja, K. Nakayama, W. Oelert, J. Ritman, T. Sefzick, M. Siemaszko, M. Silarski, J. Smyrski, A. Taeschner, M. Wolke, J. Zdebik, M. Zielinski, W. Zipper Categories: nucl-ex Journal-ref: Physics Letters B 684 (2010) 11-16 \\ The proton-proton and proton-eta' invariant mass distributions have been determined for the pp -> ppeta' reaction at an excess energy of Q = 16.4 MeV. The measurement was carried out using the COSY-11 detector setup and the proton beam of the cooler synchrotron COSY. The shapes of the determined invariant mass distributions are similar to those of the pp -> ppeta reaction and reveal an enhancement for large relative proton-proton momenta. This result, together with the fact that the proton-eta interaction is much stronger that the proton-eta' interaction, excludes the hypothesis that the observed enhancement is caused by the interaction between the proton and the meson. \\ ( http://arxiv.org/abs/1001.5174 , 94kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:physics/0512227 (*cross-listing*) Date: Fri, 23 Dec 2005 11:00:04 GMT (380kb) Title: Opto-Electronics in Large Array Gas Detector Systems Authors: M.R. Dutta Majumdar, Debasish Das, Tapan K. Nayak Categories: physics.ins-det nucl-ex Comments: 8 pages and 7 figures. Poster presented at PHOTONICS-2004, Cochin, INDIA, 9-11 December 2004 \\ Large array gas detector systems are used in particle and nuclear physics experiments involving high-energy nucleon-nucleon and heavy-ion collisions. We have observed that in large array gas detector systems the momentary discharges inside the detector cells result in slowdown of High Voltage conditioning and possible hindrances in signal processing. We have explored the opto-electronic devices like the opto-coupler, optical fibre and signal processing circuit, which provide successful monitoring procedures and preventive measures to overcome the challenges produced in such complex detector systems. \\ ( http://arxiv.org/abs/physics/0512227 , 380kb) ------------------------------------------------------------------------------ \\ arXiv:1001.3796 (*cross-listing*) Date: Thu, 21 Jan 2010 13:12:17 GMT (16kb) Title: Lattice QCD predictions for shapes of event distributions along the freezeout curve in heavy-ion collisions Authors: R. V. Gavai and Sourendu Gupta Categories: hep-lat hep-ph nucl-ex nucl-th Report-no: TIFR/TH/10-01 \\ We present lattice QCD results along the freezeout curve of heavy-ion collisions for the ongoing RHIC energy scan as well as the LHC heavy-ion runs planned for this year. The skew and kurtosis of the event distribution of baryon number are positive at all energies studied, We predict three ratios of non-linear susceptibilities along the freezeout curve as functions of the colliding energy, Sqrt[S_{NN}]. They have smooth behaviour except in the vicinity of a critical point; this can have multiple benefits. \\ ( http://arxiv.org/abs/1001.3796 , 16kb) ------------------------------------------------------------------------------ \\ arXiv:1001.5001 (*cross-listing*) Date: Wed, 27 Jan 2010 14:09:31 GMT (4301kb) Title: Introduction - Strong interaction in the nuclear medium: new trends Authors: Denis Lacroix Categories: nucl-th nucl-ex Comments: 26 pages, 28 figures--Introduction Lecture to the 2009 International Joliot-Curie School, Lacanau, France, 27 Sept.-3 Oct. 2009 \\ Recent achievements in nuclear forces theory open new perspectives for the next decade of low energy nuclear physics, bringing together people from very different communities. Although many developments remain to be done, the possibility to directly use QCD to describe nuclear system is a major challenge that is within reach. In this introduction to the 2009 International Joliot-Curie School (EJC2009), new trends in the strong nuclear interaction are summarized starting from quarks and ending with finite or infinite nuclear systems. At different energy scales, selected new concepts and ideas have been discussed in a rather simple way. Recent advances in the theory of nuclear forces, thanks to chiral perturbation and effective field theories, have led to a new generation of strong nuclear interaction particularly suited to low energy nuclear physics. The interesting aspects of new interactions compared to conventional forces are underlined. Recent achievements in ab initio theories that directly start from the bare nucleon-nucleon interaction and their key role to understand the three-body force are illustrated. Finally, future perspectives for standard nuclear physics theories, namely Shell Model and Energy Density Functional, are discussed. \\ ( http://arxiv.org/abs/1001.5001 , 4301kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:0901.0703 replaced with revised version Thu, 28 Jan 2010 15:50:34 GMT (25kb) Title: Identification of flow-background to subtract in jet-like azimuthal correlation Authors: Quan Wang and Fuqiang Wang Categories: nucl-ex Comments: 8 pages 1 table 1 figure Journal-ref: Phys. Rev. C 81, 014907 (2010) \\ ( http://arxiv.org/abs/0901.0703 , 25kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- 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. Author self-submissions are exceedingly preferred. E-mail submissions have been discontinued in favor of better support for Web submissions. See http://arXiv.org/help/uploads