Thu·May 4, 2023Thursday·May 4, 2023

1. 01*

   Event-by-event multiplicity fluctuations and correlations in ring-like and jet like events in ${}^{197}$Au-AgBr collisions at 11.6A GeV/c

   Bushra Ali🇮🇳 · Sweta Singh🇮🇳 · Anuj Chandra🇮🇳 · Shakeel Ahmad🇮🇳

   Event-by-event (ebe) multiplicity \fll and \cor amongst the charged particles emitted in the forward-backward symmetric pseudorapidity (\et) windows of varying widths and positions are investigated by analyzing the experimental data on ${}^{197}$Au-AgBr collisions at 11.6A GeV/c. The findings are compared with the predictions of relativistic transport model, \urq and independent particle emission (or mixed event) model. It is observed that the \fll in ebe mean pseudorapidity values and those reflected from the \fll strength measure, \(\Phi\) are relatively higher as compared to those expected from the statistically independent particle emission model. The study of the variance, \(\sigma_c^2\) of a suitably defined forward-backward asymmetry variable \(C\) as a function of \et window width and position indicates the presence of strong short-range correlations, which might arise due to isotropic decay of cluster-like objects either in forward or backward \et region. Furthermore, analyses of events having \ring and \jet substructures, carried out separately, suggest that the major contribution to the observed \fll in the data sample are due to ring-like events, while the contributions from the \jet events appear to be rather small. The observed difference in the behavior of correlation strengths from the two types of events might be due to the enhanced emission of Cherenkov gluons, giving rise to the \ring substructure. The mixed event analysis further confirms that the observed \fll are the distinct feature of the data, which disappear after event mixing.

   nucl-exhep-phIJMPE(2023)·2 citations
2. 02*

   Array of Cryogenic Calorimeters to Evaluate the Spectral Shape of forbidden $\beta$-decays: the ACCESS project

   L. Pagnanini🇮🇹 · G. Benato🇮🇹 · P. Carniti🇮🇹 · E. Celi🇮🇹 · D. Chiesa🇮🇹 · J. Corbett🇨🇦 · I. Dafinei🇮🇹 · S. Di Domizio🇮🇹 · P. Di Stefano🇨🇦 · S. Ghislandi🇮🇹 · C. Gotti🇮🇹 · D. L. Helis🇮🇹 and 12 other authors

   The ACCESS (Array of Cryogenic Calorimeters to Evaluate Spectral Shapes) project aims to establish a novel technique to perform precision measurements of forbidden \b{eta}-decays, which can serve as an important benchmark for nuclear physics calculations and represent a significant background in astroparticle physics experiments. ACCESS will operate a pilot array of cryogenic calorimeters based on natural and doped crystals containing \b{eta}-emitting radionuclides. In this way, natural (e.g. 113 Cd and 115In) and synthetic isotopes (e.g. 99Tc) will be simultaneously measured with a common experimental technique. The array will also include further crystals optimised to disentangle the different background sources, thus reducing the systematic uncertainty. In this paper, we give an overview of the ACCESS research program, discussing a detector design study and promising results of 115In.

   ↳ physics.ins-detnucl-exEur.Phys.J.Plus(2023)·17 citations
3. 03*

   Pixel-based tracking detectors for a Low Q2 Tagger at EIC -- status report

   Simon Gardner🇬🇧 · Derek I. Glazier🇬🇧 · Kenneth Livingston🇬🇧 · Dzmitry Maneuski🇬🇧 · Daria Sokhan🇬🇧 · Jaroslav Adam🇨🇿

   The design of pixel-based tracking detectors for a Low Q2 Tagger in the Far Backward region of the ePIC detector at EIC is presented. The physics case is outlined, together with estimates of rates and resolutions, and the current design based on Timepix4 technology is introduced.

   ↳ physics.ins-detnucl-ex2 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.