Tue·Aug 9, 2011Tuesday·August 9, 2011

1. 01*

   Half-life measurement of 66Ga with gamma-spectroscopy

   Gy. Gyürky🇭🇺 · J. Farkas🇭🇺 · Z. Halász🇭🇺 · T. Szücs🇭🇺

   The half-life of 66Ga, an isotope very important for high-energy efficiency calibration of gamma-detectors, has been measured using gamma-spectroscopy. In order to reduce systematic uncertainties, different source production methods and gamma-counting conditions have been applied. A half-life value of 9.312 +- 0.032 h has been obtained in agreement with a recent measurement but in contradiction with some of the earlier results.

   nucl-ex0 citations
2. 02*

   Nuclear Effects in Generators: the Path Forward

   Ulrich Mosel🇩🇪

   The extraction of neutrino oscillation parameters requires the determination of the neutrino energy from observations of the hadronic final state. The use of nuclear targets then requires the use of event generators to isolate the interesting elementary processes and to take experimental acceptances into account. In this talk I briefly summarize the history of event generators and their use in nuclear physics, talk briefly about the generators used in the neutrino community and then discuss future necessary developments.

   ↳ nucl-thhep-exhep-phnucl-exAIP Conf.Proc.(2011)·1 citation
3. 03*

   Gluons and the quark sea at high energies: distributions, polarization, tomography

   D. Boer · M. Diehl · R. Milner · R. Venugopalan · W. Vogelsang · A. Accardi · E. Aschenauer · M. Burkardt · R. Ent · V. Guzey · D. Hasch · K. Kumar and 177 other authors

   This report is based on a ten-week program on "Gluons and the quark sea at high-energies", which took place at the Institute for Nuclear Theory in Seattle in Fall 2010. The principal aim of the program was to develop and sharpen the science case for an Electron-Ion Collider (EIC), a facility that will be able to collide electrons and positrons with polarized protons and with light to heavy nuclei at high energies, offering unprecedented possibilities for in-depth studies of quantum chromodynamics. This report is organized around four major themes: i) the spin and flavor structure of the proton, ii) three-dimensional structure of nucleons and nuclei in momentum and configuration space, iii) QCD matter in nuclei, and iv) Electroweak physics and the search for physics beyond the Standard Model. Beginning with an executive summary, the report contains tables of key measurements, chapter overviews for each of the major scientific themes, and detailed individual contributions on various aspects of the scientific opportunities presented by an EIC.

   ↳ nucl-thhep-phnucl-ex765 citations
4. 04*

   K^- nuclear potentials from in-medium chirally motivated models

   A. Cieplý🇨🇿 · E. Friedman🇮🇱 · A. Gal🇮🇱 · D. Gazda🇨🇿 · J. Mareš🇨🇿

   A self consistent scheme for constructing K^- nuclear optical potentials from subthreshold in-medium Kbar-N s-wave scattering amplitudes is presented and applied to analysis of kaonic atoms data and to calculations of K^- quasibound nuclear states. The amplitudes are taken from a chirally motivated meson-baryon coupled-channel model, both at the Tomozawa-Weinberg leading order and at the next to leading order. Typical kaonic atoms potentials are characterized by a real part -Re V(K^-;chiral)=(85+/-5) MeV at nuclear matter density, in contrast to half this depth obtained in some derivations based on in-medium Kbar-N threshold amplitudes. The moderate agreement with data is much improved by adding complex rho- and rho^2-dependent phenomenological terms, found to be dominated by rho^2 contributions that could represent Kbar-NN -> YN absorption and dispersion, outside the scope of meson-baryon chiral models. Depths of the real potentials are then near 180 MeV. The effects of p-wave interactions are studied and found secondary to those of the dominant s-wave contributions. The in-medium dynamics of the coupled-channel model is discussed and systematic studies of K^- quasibound nuclear states are presented.

   ↳ nucl-thhep-phnucl-exPRC(2011)·73 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.