Fri·Apr 14, 2023Friday·April 14, 2023

1. 01*

   An integrated online radioassay data storage and analytics tool for nEXO

   R.H.M. Tsang🇺🇸 · A. Piepke🇺🇸 · S. Al Kharusi🇨🇦 · E. Angelico🇺🇸 · I.J. Arnquist🇺🇸 · A. Atencio🇺🇸 · I. Badhrees🇨🇦 · J. Bane🇺🇸 · V. Belov🇷🇺 · E.P. Bernard🇺🇸 · A. Bhat🇺🇸 · T. Bhatta🇺🇸 and 148 other authors

   Large-scale low-background detectors are increasingly used in rare-event searches as experimental collaborations push for enhanced sensitivity. However, building such detectors, in practice, creates an abundance of radioassay data especially during the conceptual phase of an experiment when hundreds of materials are screened for radiopurity. A tool is needed to manage and make use of the radioassay screening data to quantitatively assess detector design options. We have developed a Materials Database Application for the nEXO experiment to serve this purpose. This paper describes this database, explains how it functions, and discusses how it streamlines the design of the experiment.

   ↳ physics.ins-detnucl-exNucl.Instrum.Meth.A(2023)·5 citations
2. 02*

   A generalized hydrodynamizing initial stage for Heavy Ion Collisions

   Govert Nijs🇺🇸 · Wilke van der Schee🇨🇭

   We present an extended Bayesian analysis using Trajectum where the initial condition can now include binary scaling. For the far-from-equilibrium evolution before hydrodynamics we introduce an interpolation between free streaming and a holographically inspired evolution that exhibits fast hydrodynamization. We find strong evidence that binary scaling is incompatible with experimental data and find evidence that the holographic far-from-equilibrium evolution is preferred. We end with a discussion on several changes and improvements in the Bayesian framework.

   ↳ nucl-thhep-phnucl-ex30 citations
3. 03*

   Faddeev Calculation of ${}_{\Lambda }^3$H incorporating 2{\pi}-exchange $\Lambda$NN Interaction

   H. Kamada🇯🇵 · M. Kohno🇯🇵 · K. Miyagawa🇯🇵

   Faddeev calculations of hypertriton (${}_{\Lambda }^3$H) separation energy are performed, incorporating $2\pi$-exchange $\Lambda$NN three-baryon force. Repulsive contributions of the three-baryon force in the order of 20 keV are found, depending on the NN interactions employed. The effect is not negligible compared with the small separation-energy of ${}_{\Lambda }^3$H.

   ↳ nucl-thnucl-exPRC(2023)·9 citations
4. 04*

   Kinematical higher-twist corrections in ${\gamma }^{\ast }\to M_1{M}_2\gamma$: Neutral meson production

   Bernard Pire🇫🇷 · Qin-Tao Song🇨🇳

   We carry out the calculation of kinematical higher-twist corrections to the cross section of ${\gamma }^{\ast }\to M_1{M}_2\gamma$ up to twist 4, where $M_i$ is a scalar or pseudoscalar neutral meson. The three independant helicity amplitudes are presented in terms of the twist-2 generalized distribution amplitudes (GDAs), which are important non-perturbative quantities for understanding the 3D structure of hadrons. Since this process can be measured by BESIII in $e^{+}{e}^{-}$ collisions, we perform the numerical estimate of the kinematical higher-twist corrections by using the kinematics of BESIII. We adopt the $\pi \pi$ GDA extracted from Belle measurements and the asymptotic $\pi \pi$ GDA to study the size of the kinematical corrections in the case of pion meson pair, and a model $\eta \eta$ GDA is used to see the impact of target mass corrections $\mathcal{O}(m^2/s)$ for ${\gamma }^{\ast }\to \eta \eta \gamma$. Our results show that the kinematical higher-twist corrections account for $\sim 20\%$ of the cross sections at BESIII on the average, and it is necessary to include them if one tries to extract GDAs from experimental measurements precisely. We also comment the case of ${\pi }^0\eta$ production which is important for the search of hybrid mesons.

   ↳ hep-phhep-exnucl-exnucl-thPRD(2023)·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.