Wed·Jul 9, 2014Wednesday·July 9, 2014

1. 01*

   The N(1520) 3/2- helicity amplitudes from an energy-independent multipole analysis based on new polarization data on photoproduction of neutral pions

   J. Hartmann🇩🇪 · H. Dutz🇩🇪 · A.V. Anisovich🇩🇪 · D. Bayadilov🇩🇪 · R. Beck🇩🇪 · M. Becker🇩🇪 · Y. Beloglazov🇷🇺 · A. Berlin🇩🇪 · M. Bichow🇩🇪 · S. Böse🇩🇪 · K.-Th. Brinkmann🇩🇪 · V. Crede🇺🇸 and 65 other authors

   New data on the polarization observables T, P, and H for the reaction $\gamma p\to p{\pi }^0$ are reported. The results are extracted from azimuthal asymmetries when a transversely polarized butanol target and a linearly polarized photon beam are used. The data were taken at the Bonn electron stretcher accelerator ELSA using the CBELSA/TAPS detector. These and earlier data are used to perform a truncated energy-independent partial wave analysis in sliced-energy bins. This energy-independent analysis is compared to the results from energy-dependent partial wave analyses.

   nucl-exPRL(2014)·43 citations
2. 02*

   Neutrino signals in electron-capture storage-ring experiments

   Avraham Gal🇮🇱

   Neutrino signals in electron-capture decays of hydrogen-like parent ions P in storage-ring experiments at GSI are reconsidered, with special emphasis placed on the storage-ring quasi-circular motion of the daughter ions D in two-body decays P --> D + e-neutrino. It is argued that to the extent that daughter ions are detected, these detection rates might exhibit modulations with periods of order seconds, similar to those reported in the GSI storage-ring experiments for two-body decay rates [1,2]. New dedicated experiments in storage rings, or using traps, could explore these modulations.

   ↳ nucl-thhep-phnucl-exSymmetry(2016)·9 citations
3. 03*

   Timelike deeply virtual Compton scattering with a linearly polarized real (or quasi-real) photon beam

   A.T. Goritschnig🇦🇹 · B. Pire🇫🇷 · Jakub Wagner🇵🇱

   We calculate timelike virtual Compton scattering amplitudes in the generalized Bjorken scaling regime and focus on a new polarization asymmetry in the scattering process with a linearly polarized photon beam in the medium energy range, which will be studied intensely at JLab12 experiments. We demonstrate that new observables help us to access the polarized quark and gluon generalized parton distributions $\tilde{H}(x,\xi ,t)$ and $\tilde{E}(x,\xi ,t)$.

   ↳ hep-phnucl-exnucl-thPoS(2014)·0 citations
4. 04*

   Thermal, chemical and spectral equilibration in heavy-ion collisions

   Gábor András Almási🇩🇪 · György Wolf🇭🇺

   We have considered the equilibration in a relativistic heavy ion collision using our transport model. We applied periodic boundary conditions to close the system in a box. We found that the thermal equilibration takes place in the first 20-40 fm/c which time is comparable to the duration of a heavy ion collision. The chemical equilibration is a much slower process and the system does not equilibrate in a heavy ion collision. We have also shown that the mass spectra of broad resonances immediately follows their in-medium spectral functions.

   ↳ nucl-thhep-exhep-phnucl-exNPA(2015)·10 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.