Tue·Nov 26, 2019Tuesday·November 26, 2019

1. 01*

   First data from the CUPID-Mo neutrinoless double beta decay experiment

   B. Schmidt🇺🇸 · E. Armengaud🇫🇷 · C. Augier🇫🇷 · A. S. Barabash🇷🇺 · F. Bellini🇮🇹 · G. Benato🇺🇸 · A. Benoît🇫🇷 · M. Beretta🇮🇹 · L. Bergé · J. Billard🇫🇷 · Yu. A. Borovlev🇷🇺 · Ch. Bourgeois🇫🇷 and 78 other authors

   The CUPID-Mo experiment is searching for neutrinoless double beta decay in ${}^{100}$Mo, evaluating the technology of cryogenic scintillating Li${}_2^{100}$MoO${}_4$ detectors for CUPID (CUORE Upgrade with Particle ID). CUPID-Mo detectors feature background suppression using a dual-readout scheme with Li${}_2$MoO${}_4$ crystals complemented by Ge bolometers for light detection. The detection of both heat and scintillation light signals allows the efficient discrimination of $\alpha$ from $\gamma$&$\beta$ events. In this proceedings, we discuss results from the first 2 months of data taking in spring 2019. In addition to an excellent bolometric performance of 6.7keV (FWHM) at 2615keV and an $\alpha$ separation of better than 99.9\% for all detectors, we report on bulk radiopurity for Th and U. Finally, we interpret the accumulated physics data in terms of a limit of $T_{1/2}^{0\nu }>3\times 10^{23}$yr for ${}^{100}$Mo and discuss the sensitivity of CUPID-Mo until the expected end of physics data taking in early 2020.

   ↳ hep-exnucl-exphysics.ins-detJ.Phys.Conf.Ser.(2020)·16 citations
2. 02*

   Feasibility of ortho-positronium lifetime studies with the J-PET detector in context of mirror matter models

   W. Krzemien🇵🇱 · E. Perez del Rio🇮🇹 · Krzysztof Kacprzak🇵🇱

   We discuss the possibility to perform the experimental searches of invisible decays in the ortho-positronium system with the J-PET detector

   ↳ physics.ins-detnucl-exphysics.atom-phActa Phys.Polon.B(2020)·9 citations
3. 03*

   Recent advances in the description of reactions involving exotic nuclei

   Pierre Capel🇩🇪

   In this contribution to the proceedings of the International Nuclear Physics Conference 2019, I review recent developments made in reaction models used to analyse data measured at radioactive-ion beam facilities to study exotic nuclear structures. I focus in particular on reactions like elastic scattering and breakup, which are used to study halo nuclei. Although these peculiar nuclei challenge usual nuclear-structure models, some can now be computed ab initio. This brief review illustrates the progresses made in nuclear-reaction theory in the last few years to improve the description of the projectile within reaction models. I dedicate this contribution to the memory of Mahir Hussein, who has significantly contributed to this field and who passed away in May this year.

   ↳ nucl-thnucl-exJ.Phys.Conf.Ser.(2020)·0 citations
4. 04*

   Scintillating crystals for the Neutral Particle Spectrometer in Hall C at JLab

   T. Horn🇺🇸 · V.V. Berdnikov🇺🇸 · S. Ali🇺🇸 · A. Asaturyan🇦🇲 · M. Carmignotto🇺🇸 · J. Crafts🇺🇸 · A. Demarque🇫🇷 · R. Ent🇺🇸 · G. Hull🇫🇷 · H.-S. Ko🇫🇷 · M. Mostafavi🇫🇷 · C. Munoz-Camacho🇫🇷 and 11 other authors

   This paper discusses the quality and performance of currently available PbWO${}_4$ crystals of relevance to high-resolution electromagnetic calorimetry, e.g. detectors for the Neutral Particle Spectrometer at Jefferson Lab or those planned for the Electron-Ion Collider. Since the construction of the Compact Muon Solenoid (CMS) at the Large Hadron Collider (LHC) and early PANDA (The antiProton ANnihilations at DArmstadt) electromagnetic calorimeter (ECAL) the worldwide availability of high quality PbWO${}_4$ production has changed dramatically. We report on our studies of crystal samples from SICCAS/China and CRYTUR/Czech Republic that were produced between 2014 and 2019.

   ↳ physics.ins-dethep-exnucl-exNucl.Instrum.Meth.A(2020)·25 citations
5. 05*

   Measurements of electron transport in liquid and gas Xenon using a laser-driven photocathode

   O. Njoya · T. Tsang · M. Tarka · W. Fairbank · K.S. Kumar · T. Rao · T. Wager · S. Al Kharusi · G. Anton · I.J. Arnquist · I. Badhrees · P.S. Barbeau and 144 other authors

   Measurements of electron drift properties in liquid and gaseous xenon are reported. The electrons are generated by the photoelectric effect in a semi-transparent gold photocathode driven in transmission mode with a pulsed ultraviolet laser. The charges drift and diffuse in a small chamber at various electric fields and a fixed drift distance of 2.0 cm. At an electric field of 0.5 kV/cm, the measured drift velocities and corresponding temperature coefficients respectively are $1.97\pm 0.04$ mm/$\mu$s and $(-0.69\pm 0.05)$\%/K for liquid xenon, and $1.42\pm 0.03$ mm/$\mu$s and $(+0.11\pm 0.01)$\%/K for gaseous xenon at 1.5 bar. In addition, we measure longitudinal diffusion coefficients of $25.7\pm 4.6$ cm${}^2$/s and $149\pm 23$ cm${}^2$/s, for liquid and gas, respectively. The quantum efficiency of the gold photocathode is studied at the photon energy of 4.73 eV in liquid and gaseous xenon, and vacuum. These charge transport properties and the behavior of photocathodes in a xenon environment are important in designing and calibrating future large scale noble liquid detectors.

   ↳ physics.ins-detnucl-exNucl.Instrum.Meth.A(2020)·21 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.