Thu·Sep 25, 2014Thursday·September 25, 2014

1. 01*

   Event characterization in (very) asymmetric collisions

   G. David🇺🇸

   Event-by-event reconstruction of the collision geometry using some incarnation of the Glauber-model is a widely accepted method in studying heavy ion collisions. While there is no known problem with the procedure when applied to the collision of two large ions, we will argue that in very asymmetric collisions, like $p(d)$+A with at least one hard scattering process occuring the event geometry deduced with the simple Glauber-model may be biased.

   nucl-exJ.Phys.Conf.Ser.(2015)·2 citations
2. 02*

   Search for Majoron-emitting modes of double-beta decay of ${}^{136}$Xe with EXO-200

   EXO-200 Collaboration: J.B. Albert🇺🇸 · D.J. Auty🇺🇸 · P.S. Barbeau🇺🇸 · E. Beauchamp🇨🇦 · D. Beck🇺🇸 · V. Belov🇷🇺 · C. Benitez-Medina🇺🇸 · M. Breidenbach🇺🇸 · T. Brunner🇺🇸 · A. Burenkov🇷🇺 · G.F. Cao🇨🇳 · C. Chambers🇺🇸 and 79 other authors

   EXO-200 is a single phase liquid xenon detector designed to search for neutrinoless double-beta decay of ${}^{136}$Xe. Here we report on a search for various Majoron-emitting modes based on 100 kg$\cdot$yr exposure of ${}^{136}$Xe. A lower limit of $T_{1/2}^{{}^{136}Xe}>1.2\cdot 10^{24}$ yr at 90% C.L. on the half-life of the spectral index = 1 Majoron decay was obtained, corresponding to a constraint on the Majoron-neutrino coupling constant of $|<g_{ee}^M>|<$ (0.8-1.7)$\cdot$10${}^{-5}$.

   ↳ hep-exnucl-exphysics.ins-detPRD(2014)·67 citations
3. 03*

   Effects of global charge conservation on time evolution of cumulants of conserved charges in relativistic heavy ion collisions

   Miki Sakaida🇯🇵 · Masayuki Asakawa🇯🇵 · Masakiyo Kitazawa🇯🇵

   We investigate the effect of the global charge conservation on the cumulants of conserved charges observed in relativistic heavy ion collisions in a finite rapidity window, $\Delta \eta$, with a special emphasis on the time evolution of fluctuations in the hadronic medium. It is argued that the experimental result of the net-electric charge fluctuation observed by ALICE does not receive effects from the global charge conservation, because of the finite diffusion distance of charged particles in the hadronic stage. We emphasize that the magnitude of the effect of the global charge conservation can be estimated experimentally by combining the information on the $\Delta \eta$ dependences of various cumulants of conserved charges, similarly to other dynamical properties of the hot medium.

   ↳ nucl-thhep-phnucl-exPRC(2014)·42 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.