Mon·Dec 6, 2021Monday·December 6, 2021

1. 01*

   Study of the phase diagram of strongly interacting matter in the NA61/SHINE experiment

   Maja Mackowiak-Pawlowska (for the NA61/SHINE Collaboration)🇵🇱

   NA61/SHINE (SPS Heavy Ion and Neutrino Experiment) is a fixed target experiment located at the CERN SPS. Its strong interactions program is devoted to study properties of the phase diagram of strongly interacting matter. For this goal the two-dimensional scan is performed by measurements of hadron production properties as a function of collision energy (13A - 158A GeV/$c$) and system size (p+p, p+Pb, Be+Be, Ar+Sc, Xe+La, Pb+Pb). This contribution presents new results on the onset of deconfinement - the transition between the state of hadronic matter and the quark-gluon plasma. Also, new results on fluctuations and correlations devoted to the search for the critical point of strongly interacting matter will be presented. Obtained results are compared with the available data from other experiments and from various theoretical models.

   nucl-exPoS(2022)·5 citations
2. 02*

   The BeEST Experiment: Searching for Beyond Standard Model Neutrinos using ${}^7$Be Decay in STJs

   K.G. Leach🇺🇸 · S. Friedrich🇺🇸

   Precision measurements of nuclear $\beta$ decay are among the most sensitive methods to probe beyond Standard Model (BSM) physics in the neutrino sector. In particular, momentum conservation between the emitted decay products in the final state is sensitive to any massive new physics that couples to the neutrino mass. One way to observe these momentum recoil effects experimentally is through high-precision measurements of electron-capture (EC) nuclear decay, where the final state only contains the neutrino and a recoiling atom. The BeEST experiment precisely measures the eV-scale radiation that follows the radioactive decay of ${}^7$Be implanted into sensitive superconducting tunnel junction (STJ) quantum sensors. STJs are ideally suited for measurements of this type due to their high resolution at the low recoil energies in EC decay, and their high-rate counting capabilities. We present the motivation for the BeEST experiment and describe the various phases of the project.

   nucl-exhep-exphysics.ins-detquant-phJ.Low Temp.Phys.(2022)·32 citations
3. 03*

   Test of streaming and triggered readout schemes for the TPEX Lead Tungstate Calorimeter

   I. Friščić🇺🇸 · E. Cline🇺🇸 · J. C. Bernauer🇺🇸 · D. K. Hasell🇺🇸 · R. Johnston🇺🇸 · I. Lavrukhin🇺🇸 · S. Lee🇺🇸 · P. Moran🇺🇸 · U. Schneekloth🇩🇪

   Tests of a prototype lead tungstate calorimeter were made over two weeks at the end of September, 2019, at the DESY II Test Beam Facility in Hamburg, Germany. The purpose of these tests was to gain experience with the construction, operation, and performance of a simple lead tungstate calorimeter, and also to compare a traditional triggered readout scheme with a streaming readout approach. These tests are important for the proposed Two-Photon Exchange experiment at DESY and for work towards a future electromagnetic calorimeter that could be used in an Electron-Ion Collider detector. Details on the comparison of streaming and triggered readout schemes are presented here.

   ↳ physics.ins-detnucl-exJINST(2023)·1 citation
4. 04*

   Longitudinal distribution of initial energy density and directed flow of charged particles in relativistic heavy-ion collisions

   Ze-Fang Jiang🇨🇳 · Shanshan Cao🇨🇳 · Xiang-Yu Wu🇨🇳 · C. B. Yang🇨🇳 · Ben-Wei Zhang🇨🇳

   We study the origin of the directed flow of charged particles produced in relativistic heavy-ion collisions. Three different initial conditions, Boz$\dot{\text{e}}$k-Wyskiel, CCNU and Shen-Alzhrani, of energy density distributions are coupled to the (3+1)-dimensional viscous hydrodynamic model CLVisc, and their effects on the development of the anisotropic medium geometry, pressure gradient and radial flow are systematically compared. By comparing to experimental data at both RHIC and LHC, we find that the directed flow provides a unique constraint on the tilt of the initial medium profile in the plane spanned by the impact parameter and space-time rapidity. Within mid-rapidity, the counter-clockwise tilt is shown to be a crucial source of the positive/negative force by the pressure gradient along the impact parameter ($x$) direction at backward/forward rapidity, which drives a negative slope of the $x$ component of the medium flow velocity with respect to rapidity, and in the end the same feature of the charged particle directed flow.

   ↳ hep-phhep-thnucl-exnucl-thPRC(2022)·28 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.