Mon·Nov 30, 2015Monday·November 30, 2015

1. 01*

   Pion Induced Reactions for the Study of Charmed Baryons

   Sang-Ho Kim🇰🇷 · Atsushi Hosaka🇯🇵 · Hyun-Chul Kim🇰🇷 · Hiroyuki Noumi🇯🇵

   In this talk, we report the study of ${\pi }^{-}p\to K^{\ast 0}\Lambda$ and ${\pi }^{-}p\to D^{\ast -}{\Lambda }_c^{+}$ reactions by using an effective Lagrangian method and a hybrid Regge model. The total and differential cross sections for the $K^{\ast 0}\Lambda$ production are first calculated and then those for the $D^{\ast -}{\Lambda }_c^{+}$ one are estimated. The two models yield different results, each exhibiting specific features. Our prediction for the charm production provides valuable information about the upcoming J-PARC experiment.

   ↳ hep-phhep-exnucl-exnucl-thJPS Conf.Proc.(2016)·1 citation
2. 02*

   R&D of Commercially Manufactured Large GEM Foils

   M. Posik🇺🇸 · B. Surrow🇺🇸

   Many experiments are currently using or proposing to use large area GEM foils in their detectors, which is creating a need for commercially available GEM foils. Currently CERN is the only main distributor of GEM foils, however with the growing interest in GEM technology keeping up with the increasing demand for GEM foils will be difficult. Thus the commercialization of GEM foils has been established by Tech-Etch Inc. of Plymouth, MA, USA using the single-mask technique, which is capable of producing GEM foils over a meter long. To date Tech-Etch has successfully manufactured 10 $\times$ 10 cm${}^2$ and 40 $\times$ 40 cm${}^2$ GEM foils. We will report on the electrical and geometrical properties, along with the inner and outer hole diameter size uniformity of these foils. Furthermore, Tech-Etch has now begun producing even larger GEM foils of 50 $\times$ 50 cm${}^2$, and are currently looking into how to accommodate GEM foils on the order of one meter long. The Tech-Etch foils were found to have excellent electrical properties. The measured mean optical properties were found to reflect the desired parameters and are consistent with those measured in double-mask GEM foils, as well as single-mask GEM foils produced at CERN. They also show good hole diameter uniformity over the active area.

   ↳ physics.ins-dethep-exnucl-ex0 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.