Thu·May 7, 2015Thursday·May 7, 2015

1. 01*

   CALDER - Neutrinoless double-beta decay identification in TeO${}_2$ bolometers with kinetic inductance detectors

   E.S. Battistelli · F. Bellini · C. Bucci · M. Calvo · L. Cardani · N. Casali · M.G. Castellano · I. Colantoni · A Coppolecchia · C. Cosmelli · A. Cruciani · P. de Bernardis and 7 other authors

   Next-generation experiments searching for neutrinoless double-beta decay must be sensitive to a Majorana neutrino mass as low as 10 meV. CUORE, an array of 988 TeO${}_2$ bolometers being commissioned at Laboratori Nazionali del Gran Sasso in Italy, features an expected sensitivity of 50-130 meV at 90% C.L, that can be improved by removing the background from $\alpha$ radioactivity. This is possible if, in coincidence with the heat release in a bolometer, the Cherenkov light emitted by the $\beta$ signal is detected. The amount of light detected is so far limited to only 100 eV, requiring low-noise cryogenic light detectors. The CALDER project (Cryogenic wide-Area Light Detectors with Excellent Resolution) aims at developing a small prototype experiment consisting of TeO${}_2$ bolometers coupled to new light detectors based on kinetic inductance detectors. The R&D is focused on the light detectors that could be implemented in a next-generation neutrinoless double-beta decay experiment.

   ↳ physics.ins-dethep-exnucl-exEPJC(2015)·64 citations
2. 02*

   Energy loss, hadronization and hadronic interactions of heavy flavors in relativistic heavy-ion collisions

   Shanshan Cao🇺🇸 · Guang-You Qin🇨🇳 · Steffen A. Bass🇺🇸

   We construct a theoretical framework to describe the evolution of heavy flavors produced in relativistic heavy-ion collisions. The in-medium energy loss of heavy quarks is described using our modified Langevin equation that incorporates both quasi-elastic scatterings and the medium-induced gluon radiation. The space-time profiles of the fireball is described by a (2+1)-dimensional hydrodynamics simulation. A hybrid model of fragmentation and coalescence is utilized for heavy quark hadronization, after which the produced heavy mesons together with the soft hadrons produced from the bulk QGP are fed into the hadron cascade UrQMD model to simulate the subsequent hadronic interactions. We find that the medium-induced gluon radiation contributes significantly to heavy quark energy loss at high $p_{\mathrm{T}}$; heavy-light quark coalescence enhances heavy meson production at intermediate $p_{\mathrm{T}}$; and scatterings inside the hadron gas further suppress the $D$ meson $R_{\mathrm{AA}}$ at large $p_{\mathrm{T}}$ and enhance its $v_2$. Our calculations provide good descriptions of heavy meson suppression and elliptic flow observed at both the LHC and RHIC.

   ↳ nucl-thhep-phnucl-exPRC(2015)·203 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.