Thu·Jun 22, 2023Thursday·June 22, 2023

1. 01*

   Paarl Africa Underground Laboratory (PAUL)

   Robert Adam (5 and 1)🇿🇦 · Claire Antel (14)🇨🇭 · Munirat Bashir (23)🇩🇪 · Driss Benchekroun (18)🇲🇦 · Xavier Bertou (20)🇦🇷 · Markus Böttcher (8)🇿🇦 · Andy Buffler (7)🇿🇦 · Andrew Chen (4)🇿🇦 · Rouven Essig (22)🇺🇸 · Jules Gascon (12)🇫🇷 · Mohamed Gouighri (19)🇲🇦 · Trevor Hass (1)🇿🇦 and 34 other authors

   Establishing a deep underground physics laboratory to study, amongst others, double beta decay, geoneutrinos, reactor neutrinos and dark matter has been discussed for more than a decade within the austral African physicists' community. PAUL, the Paarl Africa Underground Laboratory, is an initiative foreseeing an open international laboratory devoted to the development of competitive science in the austral region. It has the advantage that the location, the Huguenot tunnel, exists already and the geology and the environment of the site is appropriate for an experimental facility. The paper describes the PAUL initiative, presents the physics prospects and discusses the capacity for building the future experimental facility.

   ↳ hep-exnucl-ex4 citations
2. 02*

   A Poincaré covariant cascade method for high-energy nuclear collisions

   Yasushi Nara🇯🇵 · Asanosuke Jinno🇯🇵 · Tomoyuki Maruyama🇯🇵 · Koichi Murase🇯🇵 · Akira Ohnishi🇯🇵

   We present a Poincaré covariant cascade algorithm based on the constrained Hamiltonian dynamics in an $8N$-dimensional phase space to simulate the Boltzmann-type two-body collision term. We compare this covariant cascade algorithm with traditional $6N$-dimensional phase-space cascade algorithms. To validate the covariant cascade algorithm, we perform box calculations. We examine the frame dependence of the algorithm in a one-dimensionally expanding system as well as the compression stages of colliding two nuclei. We confirm that our covariant cascade method is reliable to simulate high-energy nuclear collisions. Furthermore, we present Lorentz-covariant equations of motion for the $N$-body system interacting via potentials, which can be efficiently solved numerically.

   ↳ nucl-thhep-phnucl-exPRC(2023)·11 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.