http://prc.aps.org/ Physical Review C Editor Selections (a selection of abstracts from the physics journals of the American Physical Society) en-us Copyright (c) 2009 The American Physical Society 2009-11-07T10:36:10-05:00 assocpub@aps.org rss@aps.org hourly 4 2009-11-07T10:36:10-05:00 rss@aps.org http://link.aps.org/doi/10.1103/PhysRevLett.103.192501 Author(s): E. A. McCutchan, C. J. Lister, R. B. Wiringa, Steven C. Pieper, D. Seweryniak, J. P. Greene, M. P. Carpenter, C. J. Chiara, R. V. F. Janssens, T. L. Khoo, T. Lauritsen, I. Stefanescu, and S. Zhu<br/>In order to test ab initio calculations of light nuclei, we have remeasured lifetimes in ^{10} Be using the Doppler shift attenuation method (DSAM) following the ^{7} Li( ^{7} Li,α) ^{10} Be reaction at 8 and 10 MeV. The new experiments significantly reduce systematic uncertainties in the DSAM technique. The J^{π} =2_{1}^{+} state at 3.37 MeV has τ=205±(5)_{stat} ±(7)_{sys}   fs corresponding to a B(E2↓) of 9.2(3)e^{2}   fm^{4} in broad agreement with many calculations. The J^{π} =2_{2}^{+} state at 5.96 MeV was found to have a B(E2↓) of 0.11(2)e^{2}   fm^{4} and provides a more discriminating test of nuclear models. New Green’s function Monte Carlo calculations for these states and transitions with a number of Hamiltonians are also reported and compared to experiment.<br/>[Phys. Rev. Lett. 103, 192501] Published Wed Nov 04, 2009 E. A. McCutchan, C. J. Lister, R. B. Wiringa, Steven C. Pieper, D. Seweryniak, J. P. Greene, M. P. Carpenter, C. J. Chiara, R. V. F. Janssens, T. L. Khoo, T. Lauritsen, I. Stefanescu, and S. Zhu 2009-11-04T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.192501 Phys. Rev. Lett. 103, 192501 text/html article Physical Review Letters 103 19 2009-11-04T00:00:00-05:00 192501 Nuclear Physics Nuclear Physics http://link.aps.org/doi/10.1103/PhysRevLett.103.182502 Author(s): M. Kim et al.<br/>We have measured the branching ratio of the three-body process in the nonmesonic weak decay of _{Λ} ^{12} C to be 0.29±0.13. This result was obtained by reproducing the nucleon and the nucleon pair yields introducing a measured final state interaction. At the same time, we have determined the absolute decay widths, Γ_{n} and Γ_{p} , along with Γ_{2N} , whose relative ratio has been a long-standing puzzle. Including the three-body process, we have successfully reproduced the nucleon energy distribution, the coincidence two-nucleon angular correlation, and the momentum sum distribution simultaneously.<br/>[Phys. Rev. Lett. 103, 182502] Published Fri Oct 30, 2009 M. Kim et al. 2009-10-30T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.182502 Phys. Rev. Lett. 103, 182502 text/html article Physical Review Letters 103 18 2009-10-30T00:00:00-04:00 182502 Nuclear Physics Nuclear Physics http://link.aps.org/doi/10.1103/PhysRevLett.103.181101 Author(s): Andrew W. Steiner and Anna L. Watts<br/>We show that the fundamental seismic shear mode, observed as a quasiperiodic oscillation in giant flares emitted by highly magnetized neutron stars, is particularly sensitive to the nuclear physics of the crust. The identification of an oscillation at ≈30  Hz as the fundamental crustal shear mode requires a nuclear symmetry energy that depends very weakly on density near saturation. If the nuclear symmetry energy varies more strongly with density, then lower frequency oscillations, previously identified as torsional Alfvén modes of the fluid core, could instead be associated with the crust. If this is the case, then future observations of giant flares should detect oscillations at around 18 Hz. An accurate measurement of the neutron-skin thickness of lead will also constrain the frequencies predicted by the model.<br/>[Phys. Rev. Lett. 103, 181101] Published Mon Oct 26, 2009 Andrew W. Steiner and Anna L. Watts 2009-10-26T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.181101 Phys. Rev. Lett. 103, 181101 text/html article Physical Review Letters 103 18 2009-10-26T00:00:00-04:00 181101 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.103.171102 Author(s): G. Pagliara, M. Hempel, and J. Schaffner-Bielich<br/>The transition from hadronic to quark matter at high density is a strong first order phase transition if the surface tension between the two phases is large. While this implies a constant-pressure mixed phase in cold neutron star matter this is not the case for the hot and lepton rich matter of protoneutron stars. By considering the global conservation of lepton number during the stage of neutrino trapping, we show that a new mixed phase with non-constant pressure could appear in protoneutron stars and it would gradually disappear during deleptonization. We discuss the peculiar properties of this mixed phase and its possible significant effects on the evolution of protoneutron stars and their neutrino emission.<br/>[Phys. Rev. Lett. 103, 171102] Published Fri Oct 23, 2009 G. Pagliara, M. Hempel, and J. Schaffner-Bielich 2009-10-23T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.171102 Phys. Rev. Lett. 103, 171102 text/html article Physical Review Letters 103 17 2009-10-23T00:00:00-04:00 171102 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.103.172302 Author(s): Jacquelyn Noronha-Hostler, Jorge Noronha, and Carsten Greiner<br/>A hadron resonance gas model including all known particles and resonances with masses m<2  GeV and an exponentially rising density of Hagedorn states for m>2  GeV is used to obtain an upper bound on the shear viscosity to entropy density ratio, η/s≈1/(4π), of hadronic matter near T_{c} . We found a large trace anomaly and small speed of sound near T_{c} , which agree well with recent lattice calculations. We comment on the bulk viscosity to entropy density ratio close to T_{c} .<br/>[Phys. Rev. Lett. 103, 172302] Published Thu Oct 22, 2009 Jacquelyn Noronha-Hostler, Jorge Noronha, and Carsten Greiner 2009-10-22T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.172302 Phys. Rev. Lett. 103, 172302 text/html article Physical Review Letters 103 17 2009-10-22T00:00:00-04:00 172302 Nuclear Physics Nuclear Physics http://link.aps.org/doi/10.1103/PhysRevD.80.074025 Author(s): Dominik Nickel<br/>We discuss inhomogeneous ground states of the Nambu–Jona-Lasinio and quark-meson model within mean-field approximation and their possible existence in the respective phase diagrams. For this purpose we focus on lower-dimensional modulations and point out that known solutions in the 2+1 and 1+1 dimensional (chiral) Gross-Neveu model can be lifted to the to the 3+1 dimensional Nambu–Jona-Lasinio model. This is worked out in detail for one-dimensional modulations and numerical results for the phase diagrams are presented. Focus is put on the critical point and on vanishing temperatures. As an interesting result the first order transition line in the phase diagram of homogeneous phases gets replaced by an inhomogeneous phase which is bordered by two second order transition lines.<br/>[Phys. Rev. D 80, 074025] Published Thu Oct 22, 2009 Dominik Nickel 2009-10-22T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.074025 Phys. Rev. D 80, 074025 text/html article Physical Review D 80 7 2009-10-22T00:00:00-04:00 074025 D1 D1 http://link.aps.org/doi/10.1103/PhysRevD.80.076006 Author(s): Richard F. Lebed and Lang Yu<br/>We derive expressions for pion electroproduction amplitudes in the 1/N_{c} expansion of QCD, and obtain from them linear relations between the electromagnetic multipole amplitudes that hold at all energies. The leading-order relations in 1/N_{c} compare favorably with available data (especially away from resonances), but the next-to-leading-order relations tend to provide only small or no improvement.<br/>[Phys. Rev. D 80, 076006] Published Fri Oct 16, 2009 Richard F. Lebed and Lang Yu 2009-10-16T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.076006 Phys. Rev. D 80, 076006 text/html article Physical Review D 80 7 2009-10-16T00:00:00-04:00 076006 D1 D1 http://link.aps.org/doi/10.1103/PhysRevLett.103.152502 Author(s): J. Cerny, D. M. Moltz, D. W. Lee, K. Peräjärvi, B. R. Barquest, L. E. Grossman, W. Jeong, and C. C. Jewett<br/>An attempt to confirm the reported direct one-proton and two-proton decays of the (21+) isomer at 6.7(5) MeV in ^{94} Ag has been made. The 0.39(4) s half-life of the isomer permitted use of a helium-jet system to transport reaction products from the ^{40} Ca+ ^{nat} Ni reaction at 197 MeV to a low-background area; 24 gas ΔE-(Si)E detector telescopes were used to identify emitted protons down to 0.4 MeV. No evidence was obtained for two-proton radioactivity with a summed energy of 1.9(1) MeV and a branching ratio of 0.5(3)%. Two groups of one-proton radioactivity from this isomer had also been reported; our data confirm the lower energy group at 0.79(3) MeV with its branching ratio of 1.9(5)%.<br/>[Phys. Rev. Lett. 103, 152502] Published Fri Oct 09, 2009 J. Cerny, D. M. Moltz, D. W. Lee, K. Peräjärvi, B. R. Barquest, L. E. Grossman, W. Jeong, and C. C. Jewett 2009-10-09T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.152502 Phys. Rev. Lett. 103, 152502 text/html article Physical Review Letters 103 15 2009-10-09T00:00:00-04:00 152502 Nuclear Physics Nuclear Physics http://link.aps.org/doi/10.1103/PhysRevLett.103.152302 Author(s): Korinna Zapp, Johanna Stachel, and Urs Achim Wiedemann<br/>The non-Abelian Landau-Pomeranschuk-Migdal (LPM) effect arises from the quantum interference between spatially separated, inelastic radiation processes in matter. A consistent probabilistic implementation of this LPM effect is a prerequisite for extending the use of Monte Carlo (MC) event generators to the simulation of jetlike multiparticle final states in nuclear collisions. Here, we propose a local MC algorithm, which is based solely on relating the LPM effect to the probabilistic concept of formation time for virtual quanta. This accounts probabilistically for the characteristic L^{2} dependence of average parton energy loss and the characteristic 1/ sqrt[ω] modification of the non-Abelian LPM effect. Additional kinematic constraints are found to modify these L^{2} and ω dependencies characteristically in accordance with analytical estimates.<br/>[Phys. Rev. Lett. 103, 152302] Published Thu Oct 08, 2009 Korinna Zapp, Johanna Stachel, and Urs Achim Wiedemann 2009-10-08T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.152302 Phys. Rev. Lett. 103, 152302 text/html article Physical Review Letters 103 15 2009-10-08T00:00:00-04:00 152302 Nuclear Physics Nuclear Physics http://link.aps.org/doi/10.1103/PhysRevLett.103.152303 Author(s): G.-Y. Qin, A. Majumder, H. Song, and U. Heinz<br/>For a hard parton moving through a dense QCD medium, we compute self-consistently the energy loss and the fraction deposited into the medium due to showering and rescattering of the shower, assuming weak coupling between probe and medium. The same transport coefficients thus determine both the energy loss and its deposition into the medium. This allows a parameter free calculation of the latter once the former are computed or measured. We compute them for a weakly interacting medium. Assuming a short thermalization time for the deposited energy, we determine the medium’s hydrodynamical response and obtain a conical pattern that is strongly enhanced by showering.<br/>[Phys. Rev. Lett. 103, 152303] Published Thu Oct 08, 2009 G.-Y. Qin, A. Majumder, H. Song, and U. Heinz 2009-10-08T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.152303 Phys. Rev. Lett. 103, 152303 text/html article Physical Review Letters 103 15 2009-10-08T00:00:00-04:00 152303 Nuclear Physics Nuclear Physics http://link.aps.org/doi/10.1103/PhysRevD.80.074008 Author(s): T. Ito, W. Bentz, I. C. Cloët, A. W. Thomas, and K. Yazaki<br/>A description of fragmentation functions which satisfy the momentum and isospin sum rules is presented in an effective quark theory. Concentrating on the pion fragmentation function, we first explain why the elementary (lowest order) fragmentation process q→qπ is completely inadequate to describe the empirical data, although the crossed process π→qq [over ¯] describes the quark distribution functions in the pion reasonably well. Taking into account cascadelike processes in a generalized jet-model approach, we then show that the momentum and isospin sum rules can be satisfied naturally, without the introduction of ad hoc parameters. We present results for the Nambu–Jona-Lasinio (NJL) model in the invariant mass regularization scheme and compare them with the empirical parametrizations. We argue that the NJL-jet model, developed herein, provides a useful framework with which to calculate the fragmentation functions in an effective chiral quark theory.<br/>[Phys. Rev. D 80, 074008] Published Thu Oct 08, 2009 T. Ito, W. Bentz, I. C. Cloët, A. W. Thomas, and K. Yazaki 2009-10-08T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.074008 Phys. Rev. D 80, 074008 text/html article Physical Review D 80 7 2009-10-08T00:00:00-04:00 074008 D1 D1 http://link.aps.org/doi/10.1103/PhysRevLett.103.152501 Author(s): D. G. Middleton et al.<br/>Cross sections for the ^{3} He(e,e^{′} pn) ^{1} H reaction were measured for the first time at energy transfers of 220 and 270 MeV for several momentum transfers ranging from 300 to 450  MeV/c. Cross sections are presented as a function of the momentum of the recoil proton and the momentum transfer. Continuum Faddeev calculations using the Argonne V18 and Bonn-B nucleon-nucleon potentials overestimate the measured cross sections by a factor 5 at low recoil proton momentum with the discrepancy becoming smaller at higher recoil proton momentum.<br/>[Phys. Rev. Lett. 103, 152501] Published Wed Oct 07, 2009 D. G. Middleton et al. 2009-10-07T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.152501 Phys. Rev. Lett. 103, 152501 text/html article Physical Review Letters 103 15 2009-10-07T00:00:00-04:00 152501 Nuclear Physics Nuclear Physics http://link.aps.org/doi/10.1103/PhysRevLett.103.159903 Author(s): A. Di Leva, L. Gialanella, R. Kunz, D. Rogalla, D. Schürmann, F. Strieder, M. De Cesare, N. De Cesare, A. D’Onofrio, Z. Fülöp, G. Gyürky, G. Imbriani, G. Mangano, A. Ordine, V. Roca, C. Rolfs, M. Romano, E. Somorjai, and F. Terrasi<br/>[Phys. Rev. Lett. 103, 159903] Published Tue Oct 06, 2009 A. Di Leva, L. Gialanella, R. Kunz, D. Rogalla, D. Schürmann, F. Strieder, M. De Cesare, N. De Cesare, A. D’Onofrio, Z. Fülöp, G. Gyürky, G. Imbriani, G. Mangano, A. Ordine, V. Roca, C. Rolfs, M. Romano, E. Somorjai, and F. Terrasi 2009-10-06T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.159903 Phys. Rev. Lett. 103, 159903 text/html article Physical Review Letters 103 15 2009-10-06T00:00:00-04:00 159903 Errata Errata http://link.aps.org/doi/10.1103/PhysRevLett.103.152301 Author(s): Andreas Ipp, Christoph H. Keitel, and Jörg Evers<br/>Present ultrafast laser optics is at the frontier between atto- and zeptosecond photon pulses, giving rise to unprecedented applications. We show that high-energetic photon pulses down to the yoctosecond time scale can be produced in heavy-ion collisions. We focus on photons produced during the initial phase of the expanding quark-gluon plasma. We study how the time evolution and properties of the plasma may influence the duration and shape of the photon pulse. Prospects for achieving double-peak structures suitable for pump-probe experiments at the yoctosecond time scale are discussed.<br/><img src="http://prola.aps.org/graphics/prlsugg30x30.gif" width="30" height="30" alt="PRL Editors' Suggestion"/><br/>[Phys. Rev. Lett. 103, 152301] Published Mon Oct 05, 2009 Andreas Ipp, Christoph H. Keitel, and Jörg Evers 2009-10-05T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.152301 Phys. Rev. Lett. 103, 152301 text/html article Physical Review Letters 103 15 2009-10-05T00:00:00-04:00 152301 Nuclear Physics Nuclear Physics http://link.aps.org/doi/10.1103/PhysRevLett.103.142501 Author(s): K. T. Flanagan et al.<br/>We report the first confirmation of the predicted inversion between the π2p_{3/2} and π1f_{5/2} nuclear states in the νg_{9/2} midshell. This was achieved at the ISOLDE facility, by using a combination of in-source laser spectroscopy and collinear laser spectroscopy on the ground states of ^{71,73,75} Cu, which measured the nuclear spin and magnetic moments. The obtained values are μ( ^{71} Cu)=+2.2747(8)μ_{N} , μ( ^{73} Cu)=+1.7426(8)μ_{N} , and μ( ^{75} Cu)=+1.0062(13)μ_{N} corresponding to spins I=3/2 for ^{71,73} Cu and I=5/2 for ^{75} Cu. The results are in fair agreement with large-scale shell-model calculations.<br/>[Phys. Rev. Lett. 103, 142501] Published Fri Oct 02, 2009 K. T. Flanagan et al. 2009-10-02T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.142501 Phys. Rev. Lett. 103, 142501 text/html article Physical Review Letters 103 14 2009-10-02T00:00:00-04:00 142501 Nuclear Physics Nuclear Physics http://link.aps.org/doi/10.1103/PhysRevD.80.085001 Author(s): Guillaume Beuf, Cyrille Marquet, and Bo-Wen Xiao<br/>Using the AdS/CFT correspondence, we compute the radiative energy loss of a slowly decelerating heavy quark with mass M moving through a supersymmetric Yang-Mills plasma at temperature T and large ’t Hooft coupling λ. The calculation is carried out in terms of perturbations in sqrt[λ] T/M, and the rate of the energy loss is computed up to second order. We explain the physical meaning of each correction and estimate the thermalization time of a heavy quark moving in a strongly-coupled plasma.<br/>[Phys. Rev. D 80, 085001] Published Thu Oct 01, 2009 Guillaume Beuf, Cyrille Marquet, and Bo-Wen Xiao 2009-10-01T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.085001 Phys. Rev. D 80, 085001 text/html article Physical Review D 80 8 2009-10-01T00:00:00-04:00 085001 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.085002 Author(s): Steve Blanchet, Z. Chacko, and Rabindra N. Mohapatra<br/>We consider theories where the standard model (SM) neutrinos acquire masses through the seesaw mechanism at the weak scale. We show that in such a scenario, the requirement that any preexisting baryon asymmetry, regardless of its origin, not be washed out leads to correlations between the pattern of SM neutrino masses and the spectrum of new particles at the weak scale, leading to definite predictions for the LHC. For type I seesaw models with a TeV scale Z^{′} coupled to SM neutrinos, we find that for a normal neutrino mass hierarchy, at least one of the right-handed neutrinos must be “electrophobic,” decaying with a strong preference into final states with muons and tauons rather than electrons. For inverted or quasidegenerate mass patterns, on the other hand, we find upper bounds on the mass of at least one right-handed neutrino. In particular, for an inverted mass hierarchy, this bound is 1 TeV, while the corresponding upper limit in the quasidegenerate case is 300 GeV. Similar results hold in type III seesaw models, albeit with somewhat more stringent bounds. For the type II seesaw case with a weak-scale SU(2) triplet Higgs, we again find that an interesting range of Higgs triplet masses is disallowed by these considerations.<br/>[Phys. Rev. D 80, 085002] Published Thu Oct 01, 2009 Steve Blanchet, Z. Chacko, and Rabindra N. Mohapatra 2009-10-01T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.085002 Phys. Rev. D 80, 085002 text/html article Physical Review D 80 8 2009-10-01T00:00:00-04:00 085002 D15 D15 http://link.aps.org/doi/10.1103/PhysRevLett.103.142301 Author(s): S. Afanasiev et al. PHENIX Collaboration<br/>Bose-Einstein correlations of charged kaons are used to probe Au+Au collisions at sqrt[s_{NN} ] =200  GeV and are compared to charged pion probes, which have a larger hadronic scattering cross section. Three-dimensional Gaussian source radii are extracted, along with a one-dimensional kaon emission source function. The centrality dependences of the three Gaussian radii are well described by a single linear function of N_{part}^{1/3} with a zero intercept. Imaging analysis shows a deviation from a Gaussian tail at r≳10  fm, although the bulk emission at lower radius is well described by a Gaussian. The presence of a non-Gaussian tail in the kaon source reaffirms that the particle emission region in a heavy-ion collision is extended, and that similar measurements with pions are not solely due to the decay of long-lived resonances.<br/>[Phys. Rev. Lett. 103, 142301] Published Wed Sep 30, 2009 S. Afanasiev et al. PHENIX Collaboration 2009-09-30T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.142301 Phys. Rev. Lett. 103, 142301 text/html article Physical Review Letters 103 14 2009-09-30T00:00:00-04:00 142301 Nuclear Physics Nuclear Physics http://link.aps.org/doi/10.1103/PhysRevLett.103.142302 Author(s): Roy A. Lacey, R. Wei, N. N. Ajitanand, J. M. Alexander, X. Gong, J. Jia, A. Mawi, S. Mohapatra, D. Reynolds, S. Salnikov, and A. Taranenko<br/>The scaling properties of jet-suppression measurements are compared for nonphotonic electrons (e^{±} ) and neutral pions (π^{0} ) in Au+Au collisions at sqrt[s_{NN} ] =200  GeV. For a broad range of transverse momenta and collision centralities, the comparison is consistent with jet quenching dominated by radiative energy loss for both heavy and light partons. Less quenching is indicated for heavy quarks via e^{±} ; this gives an independent estimate of the transport coefficient q [over ^] that agrees with its magnitude obtained from quenching of light partons via π^{0} ’s.<br/>[Phys. Rev. Lett. 103, 142302] Published Wed Sep 30, 2009 Roy A. Lacey, R. Wei, N. N. Ajitanand, J. M. Alexander, X. Gong, J. Jia, A. Mawi, S. Mohapatra, D. Reynolds, S. Salnikov, and A. Taranenko 2009-09-30T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.142302 Phys. Rev. Lett. 103, 142302 text/html article Physical Review Letters 103 14 2009-09-30T00:00:00-04:00 142302 Nuclear Physics Nuclear Physics http://link.aps.org/doi/10.1103/PhysRevD.80.051502 Author(s): Harvey B. Meyer<br/>We compute the entropy density of the confined phase of QCD without quarks on the lattice to very high accuracy. The results are compared to the entropy density of free glueballs, where we include all the known glueball states below the two-particle threshold. We find that an excellent, parameter-free description of the entropy density between 0.7T_{c} and T_{c} is obtained by extending the spectrum with the exponential spectrum of the closed bosonic string.<br/><img src="http://prola.aps.org/graphics/rapid30x30.gif" width="30" height="30" alt="Rapid Communication"/><br/>[Phys. Rev. D 80, 051502] Published Wed Sep 30, 2009 Harvey B. Meyer 2009-09-30T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.051502 Phys. Rev. D 80, 051502 text/html article Physical Review D 80 5 2009-09-30T00:00:00-04:00 051502 D1 D1 http://link.aps.org/doi/10.1103/PhysRevD.80.054026 Author(s): Elliot Leader, Aleksander V. Sidorov, and Dimiter B. Stamenov<br/>The results on polarized parton densities obtained using different methods of QCD analysis of the present polarized DIS data are discussed. Their dependence on the method used in the analysis, accounting or not for the kinematic and dynamic 1/Q^{2} corrections to spin structure function g_{1} , is demonstrated. It is pointed out that the precise data in the preasymptotic region require a more careful matching of the QCD predictions to the data in this region in order to determine the polarized parton densities correctly.<br/>[Phys. Rev. D 80, 054026] Published Tue Sep 29, 2009 Elliot Leader, Aleksander V. Sidorov, and Dimiter B. Stamenov 2009-09-29T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.054026 Phys. Rev. D 80, 054026 text/html article Physical Review D 80 5 2009-09-29T00:00:00-04:00 054026 D1 D1 http://link.aps.org/doi/10.1103/PhysRevD.80.054028 Author(s): D. Nicmorus, G. Eichmann, A. Krassnigg, and R. Alkofer<br/>We present a calculation of the three-quark core contribution to the mass of the Δ resonance in a Poincaré-covariant Faddeev framework. A consistent setup for the dressed-quark propagator, the quark-quark and quark-”diquark” interactions is used, where all the ingredients are solutions of their respective Dyson-Schwinger or Bethe-Salpeter equations in rainbow-ladder truncation. We discuss the evolution of the Δ mass with the current-quark mass and compare to the previously obtained mass of the nucleon.<br/>[Phys. Rev. D 80, 054028] Published Tue Sep 29, 2009 D. Nicmorus, G. Eichmann, A. Krassnigg, and R. Alkofer 2009-09-29T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.054028 Phys. Rev. D 80, 054028 text/html article Physical Review D 80 5 2009-09-29T00:00:00-04:00 054028 D1 D1 http://link.aps.org/doi/10.1103/PhysRevD.80.054510 Author(s): K. Jansen, C. McNeile, C. Michael, and C. Urbach<br/>We report results for the masses of the flavor nonsinglet light 0^{++} , 1^{--} , and 1^{+-} mesons from unquenched lattice QCD at two lattice spacings. The twisted mass formalism was used with two flavors of sea quarks. For the 0^{++} and 1^{+-} mesons we look for the effect of decays on the mass dependence. For the light vector mesons we study the chiral extrapolations of the mass. We report results for the leptonic and transverse decay constants of the ρ meson. We test the mass dependence of the KSRF relations, between the mass, leptonic coupling constant, and strong coupling of the rho meson.<br/>[Phys. Rev. D 80, 054510] Published Tue Sep 29, 2009 K. Jansen, C. McNeile, C. Michael, and C. Urbach 2009-09-29T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.054510 Phys. Rev. D 80, 054510 text/html article Physical Review D 80 5 2009-09-29T00:00:00-04:00 054510 D1 D1 http://link.aps.org/doi/10.1103/PhysRevLett.103.132503 Author(s): Arun K. Jain and Bhushan N. Joshi<br/>Finite range calculations for the (α, 2α) reactions are performed for the first time to remove huge inconsistencies obtained earlier in conventional zero range analyses. Vagaries of the energy dependent experimental observations up to 200 MeV are understood using the well-established nuclear radii and distorting optical potentials. The results are found to be sensitive to the short distance behavior of the α-α interaction, indicating the utility of the knockout reactions as a probe of the knockout vertex at short distances. Our approach paves the way to include finite range effects in atomic and molecular physics as also in neutron multiplication calculations.<br/>[Phys. Rev. Lett. 103, 132503] Published Fri Sep 25, 2009 Arun K. Jain and Bhushan N. Joshi 2009-09-25T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.132503 Phys. Rev. Lett. 103, 132503 text/html article Physical Review Letters 103 13 2009-09-25T00:00:00-04:00 132503 Nuclear Physics Nuclear Physics http://link.aps.org/doi/10.1103/PhysRevLett.103.132502 Author(s): L. Stavsetra, K. E. Gregorich, J. Dvorak, P. A. Ellison, I. Dragojević, M. A. Garcia, and H. Nitsche<br/>Independent verification of the production of element 114 in the reaction of 244-MeV ^{48} Ca with ^{242} Pu is presented. Two chains of time- and position-correlated decays have been assigned to ^{286} 114 and ^{287} 114. The observed decay modes, half-lives, and decay energies agree with published results. The measured cross sections at a center-of-target energy of 244 MeV for the ^{242} Pu( ^{48} Ca,3–4n) ^{287,286} 114 reactions were 1.4_{-1.2}^{+3.2}   pb each, which are lower than the reported values.<br/>[Phys. Rev. Lett. 103, 132502] Published Thu Sep 24, 2009 L. Stavsetra, K. E. Gregorich, J. Dvorak, P. A. Ellison, I. Dragojević, M. A. Garcia, and H. Nitsche 2009-09-24T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.132502 Phys. Rev. Lett. 103, 132502 text/html article Physical Review Letters 103 13 2009-09-24T00:00:00-04:00 132502 Nuclear Physics Nuclear Physics http://link.aps.org/doi/10.1103/PhysRevD.80.057901 Author(s): L. Ya. Glozman and A. V. Nefediev<br/>We perform a general chiral symmetry and unitarity based analysis of a local process of the fermion-antifermion creation from the vacuum by a high-energy photon as well as an explicit partial wave analysis of the vector current in QED and QCD. Such a local process proceeds necessarily via a certain superposition of the S- and D-wave contributions. These constraints are consistent with the well-known theoretical and experimental results on e^{+} e^{-} →γ→μ^{+} μ^{-} . Then a free quark loop in the 1^{--} channel, representing the leading term in the operator product expansion, contains both S-wave and D-wave contributions. This fact rules out the possibility that there is only one radial trajectory for the ρ-mesons with the fixed S-wave content. It also implies that all holographic models that assume a pure S-wave content of the ρ-meson have to fail to satisfy the matching conditions at the ultraviolet border z=0.<br/>[Phys. Rev. D 80, 057901] Published Thu Sep 24, 2009 L. Ya. Glozman and A. V. Nefediev 2009-09-24T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.057901 Phys. Rev. D 80, 057901 text/html article Physical Review D 80 5 2009-09-24T00:00:00-04:00 057901 D1 D1 http://link.aps.org/doi/10.1103/PhysRevD.80.065026 Author(s): M. Lublinsky and E. Shuryak<br/>We generalize (linearized) relativistic hydrodynamics by including all order gradient expansion of the energy-momentum tensor, parametrized by four momenta-dependent transport coefficients, one of which is the usual shear viscosity. We then apply the AdS/CFT duality for N=4 SUSY in order to compute the retarded correlators of the energy-momentum tensor. From these correlators we determine a large set of transport coefficients of third- and fourth-order hydrodynamics. We find that higher order terms have a tendency to reduce the effect of viscosity.<br/>[Phys. Rev. D 80, 065026] Published Thu Sep 24, 2009 M. Lublinsky and E. Shuryak 2009-09-24T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.065026 Phys. Rev. D 80, 065026 text/html article Physical Review D 80 6 2009-09-24T00:00:00-04:00 065026 D15 D15 http://link.aps.org/doi/10.1103/PhysRevLett.103.132301 Author(s): G. Agakishiev et al. HADES Collaboration<br/>We report first results on a deep subthreshold production of the doubly strange hyperon Ξ^{-} in a heavy-ion reaction. At a beam energy of 1.76A  GeV the reaction Ar+KCl was studied with the High Acceptance Di-Electron Spectrometer at SIS18/GSI. A high-statistics and high-purity Λ sample was collected, allowing for the investigation of the decay channel Ξ^{-} →Λπ^{-} . The deduced Ξ^{-} /(Λ+Σ^{0} ) production ratio of (5.6±1.2_{-1.7}^{+1.8} )×10^{-3} is significantly larger than available model predictions.<br/>[Phys. Rev. Lett. 103, 132301] Published Wed Sep 23, 2009 G. Agakishiev et al. HADES Collaboration 2009-09-23T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.132301 Phys. Rev. Lett. 103, 132301 text/html article Physical Review Letters 103 13 2009-09-23T00:00:00-04:00 132301 Nuclear Physics Nuclear Physics http://link.aps.org/doi/10.1103/PhysRevLett.103.132501 Author(s): Ken’ichiro Nakazato, Kazuhiro Oyamatsu, and Shoichi Yamada<br/>Nuclear matter is considered to be inhomogeneous at subnuclear densities that are realized in supernova cores and neutron star crusts, and the structures of nuclear matter change from spheres to cylinders, slabs, cylindrical holes, and spherical holes as the density increases. In this Letter, we discuss other possible structures, that is, gyroid and double-diamond morphologies, which are periodic bicontinuous structures discovered in a block copolymer. Utilizing the compressible liquid drop model, we show that there is a chance of gyroid appearance near the transition point from a cylinder to a slab and the volume fraction at this point is also similar for nuclear and polymer systems. Although the five shapes listed initially have been long thought to be the only major constituents of so-called nuclear pasta at subnuclear densities, our findings imply that this belief needs to be reconsidered.<br/>[Phys. Rev. Lett. 103, 132501] Published Mon Sep 21, 2009 Ken’ichiro Nakazato, Kazuhiro Oyamatsu, and Shoichi Yamada 2009-09-21T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.132501 Phys. Rev. Lett. 103, 132501 text/html article Physical Review Letters 103 13 2009-09-21T00:00:00-04:00 132501 Nuclear Physics Nuclear Physics http://link.aps.org/doi/10.1103/PhysRevD.80.053009 Author(s): H. L. Ge, C. Giunti, and Q. Y. Liu<br/>We present the results of a Bayesian analysis of solar and KamLAND neutrino data in the framework of three-neutrino mixing. We adopt two approaches for the prior probability distribution of the oscillation parameters Δm_{21}^{2} , sin⁡^{2} ϑ_{12} , sin⁡^{2} ϑ_{13} : (1) a traditional flat uninformative prior; and (2) an informative prior which describes the limits on sin⁡^{2} ϑ_{13} obtained in atmospheric and long-baseline accelerator and reactor neutrino experiments. In both approaches, we present the allowed regions in the sin⁡^{2} ϑ_{13} -Δm_{21}^{2} and sin⁡^{2} ϑ_{12} -sin⁡^{2} ϑ_{13} planes, as well as the marginal posterior probability distribution of sin⁡^{2} ϑ_{13} . We confirm the 1.2σ hint of ϑ_{13} >0 found in [G. Fogli , Phys. Rev. Lett. 101, 141801 (2008).] from the analysis of solar and KamLAND neutrino data. We found that the statistical significance of the hint is reduced to about 0.8σ by the constraints on sin⁡^{2} ϑ_{13} coming from atmospheric and long-baseline accelerator and reactor neutrino data, in agreement with [T. Schwetz, M. Tortola, and J. W. F. Valle, New J. Phys. 10, 113011 (2008).].<br/>[Phys. Rev. D 80, 053009] Published Mon Sep 21, 2009 H. L. Ge, C. Giunti, and Q. Y. Liu 2009-09-21T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.053009 Phys. Rev. D 80, 053009 text/html article Physical Review D 80 5 2009-09-21T00:00:00-04:00 053009 D1 D1