Thu·Aug 1, 2019Thursday·August 1, 2019

1. 01*

   Hyperon II: Properties of excited hyperons

   A.V. Sarantsev🇩🇪 · M. Matveev🇩🇪 · V.A. Nikonov🇩🇪 · A.V. Anisovich🇩🇪 · U. Thoma🇩🇪 · E. Klempt🇩🇪

   We report properties of $\Lambda$ and $\Sigma$ hyperon resonances formed in $K^{-}$ induced reactions. Special emphasis is laid on the analysis of the three-body final states $2{\pi }^0\Lambda$ and $2{\pi }^0\Sigma$ and of the quasi-two-body final states $\pi \Lambda (1520)$, $\bar{K}\Delta (1232)$, $\pi \Sigma (1385)$, ${\bar{K}}^{\ast }N$, and $\omega \Lambda$. We give pole positions of $\Lambda$ and $\Sigma$ hyperon resonances and transition residues from the $K^{-}p$ initial to various final states as well as Breit-Wigner masses and widths and decay branching ratios. Twenty resonances and "bumps" reported in the Review of Particle Physics are not required in our fits, evidence for five new resonances is reported. The observed mass spectrum is compared to the spectrum calculated in the Bonn quark model. Three spin doublets, six $\Lambda$ hyperons, are tentatively assigned to the SU(3) singlet system.

   nucl-exEPJA(2019)·60 citations
2. 02*

   Study of the effect of external noise pickups on the performance of a cryogenic bolometer

   A. Garai🇮🇳 · A. Reza🇮🇳 · A. Mazumdar🇮🇳 · H. Krishnamoorthy🇮🇳 · G. Gupta🇮🇳 · M.S. Pose🇮🇳 · S. Mallikarjunachary🇮🇳 · V. Nanal🇮🇳 · R. G. Pillay🇮🇳 · S. Ramakrishnan🇮🇳

   This paper reports the detailed noise characterization, investigation of various noise sources and its mitigation to improve the performance of a cryogenic bolometer detector. The noise spectrum has been measured for a sapphire bolometer test setup with indigenously developed NTD Ge sensor in the CFDR system at Mumbai. The effect of external noise, arising either from ground loops in the system or from the diagnostic and control electronics of the cryostat, on the performance of a cryogenic bolometer is assessed. A systematic comparison of the influence of different noise pickups on the bolometer resolution is also presented. The best-achieved resolution at 15mK is ~15 keV for heater pulses and appears to be mainly limited by the noise due to the pulse tube cryocooler.

   ↳ physics.ins-dethep-exnucl-exRev.Sci.Instrum.(2019)·3 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.