Thu·May 12, 2022Thursday·May 12, 2022

1. 01*

   Search for neutrinoless quadruple beta decay of ${}^{136}$Xe in XMASS-I

   XMASS Collaboration : K.Abe🇯🇵 · K.Hiraide🇯🇵 · K.Ichimura🇯🇵 · N.Kato🇯🇵 · Y.Kishimoto🇯🇵 · K.Kobayashi🇯🇵 · M.Kobayashi🇯🇵 · S. Moriyama🇯🇵 · M. Nakahata🇯🇵 · K. Sato🇯🇵 · H. Sekiya🇯🇵 · T. Suzuki🇯🇵 and 24 other authors

   A search for the neutrinoless quadruple beta decay of ${}^{136}$Xe was conducted with the liquid-xenon detector XMASS-I using $327\mathrm{kg}\times 800.0\mathrm{days}$ of the exposure. The pulse shape discrimination based on the scintillation decay time constant which distinguishes $\gamma$-rays including the signal and $\beta$-rays was used to enhance the search sensitivity. No significant signal excess was observed from the energy spectrum fitting with precise background evaluation, and we set a lower limit of the half life of 3.7 $\times$ 10${}^{24}$ years at 90$\%$ confidence level. This is the first experimental constraint of the neutrinoless quadruple beta decay of ${}^{136}$Xe.

   nucl-exhep-exphysics.ins-detPLB(2022)·1 citation
2. 02*

   Factorial cumulants from short-range correlations and global baryon number conservation

   Michał Barej🇵🇱 · Adam Bzdak🇵🇱

   We calculate the baryon factorial cumulants assuming arbitrary short-range correlations and the global baryon number conservation. The general factorial cumulant generating function is derived. Various relations between factorial cumulants subjected to baryon number conservation and the factorial cumulants without this constraint are presented. We observe that for $n$-th factorial cumulant, the short-range correlations of more than $n$ particles are suppressed with the increasing number of particles. The recently published [1] relations between the cumulants in a finite acceptance with global baryon conservation and the grand-canonical susceptibilities are reproduced.

   ↳ hep-phhep-exnucl-exnucl-thPRC(2022)·9 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.