Thu·Aug 18, 2011Thursday·August 18, 2011

1. 01*

   Measurement of the polarization observables T, P, H in pseudoscalar meson photoproduction with the CBELSA/TAPS experiment

   Jan Hartmann (for the CBELSA/TAPS collaboration)🇩🇪

   The CBELSA/TAPS experiment with a longitudinally or transversely polarized target and an energy tagged, linearly or circularly polarized photon beam allows the measurement of a large set of polarization observables. Due to its good energy resolution and high detection efficiency for photons, as well as the nearly complete solid angle coverage, it is ideally suited for the measurement of neutral mesons decaying into photons. Preliminary results for the target asymmetry T, the recoil polarization P, and the double polarization observable H are shown for \pi^0 and \eta photoproduction off the proton.

   nucl-exAIP Conf.Proc.(2012)·2 citations
2. 02*

   Reply to Comment on "High-Precision Determination of the Electric and Magnetic Form Factors of the Proton"

   J. C. Bernauer · P. Achenbach · C. Ayerbe Gayoso · R. Böhm · D. Bosnar · L. Debenjak · M. O. Distler · L. Doria · A. Esser · H. Fonvieille · J. M. Friedrich · J. Friedrich and 13 other authors

   In arXiv:1108.3058v1 [nucl-ex], Arrington criticizes the Coulomb corrections we applied in the analysis of high precision form factor data (see Phys.Rev.Lett.105:242001, 2010, arXiv:1007.5076v3 [nucl-ex]). We show, by comparing different calculations cited in the Comment, that the criticism of the Comment neglects the large uncertainty of "more modern" TPE corrections. This uncertainty has also been seen in recent polarized measurements. We rerun our analysis using one of these calculations. The results show that the Comment exaggerates the quantitative effect at small Q^2.

   nucl-ex6 citations
3. 03*

   Quasiparticle-vibration coupling in relativistic framework: shell structure of Z=120 isotopes

   Elena Litvinova🇩🇪

   For the first time, the shell structure of open-shell nuclei is described in a fully self-consistent extension of the covariant energy density functional theory. The approach implies quasiparticle-vibration coupling for superfluid systems. One-body Dyson equation formulated in the doubled quasiparticle space of Dirac spinors is solved for nucleonic propagators in tin isotopes which represent the reference case: the obtained energies of the single-quasiparticle levels and their spectroscopic amplitudes are in agreement with data. The model is applied to describe the shell evolution in a chain of superheavy isotopes ${}^{292,296,300,304}$120 and finds a rather stable proton spherical shell closure at Z = 120. An interplay of the pairing correlations and the quasiparticle-phonon coupling gives rise for a smooth evolution of the neutron shell gap between N = 172 and N = 184 neutron numbers. Vibrational corrections to the alpha decay energies reach several hundred keV and can be either positive and negative, thus also smearing the shell effects.

   ↳ nucl-thnucl-exPRC(2012)·60 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.