Tue·Sep 20, 2022Tuesday·September 20, 2022

1. 01*

   The soup that is not too hot

   Maria Stefaniak🇩🇪

   The exploration of the QCD phase diagram is the goal of many experiments in the world. The low net baryon density region is relatively well studied, while the one corresponding to higher net densities still contains multiple unrevealed puzzles getting significant attention. In multiple experimental complexes such as STAR or HADES, the heavy ions collide at relatively lower energies than those obtained at LHC, creating "not the hottest soup" of nuclear matter. The examination of it provides unique insights into understanding the properties of matter production and its transitions. In this paper, several of the significant experimental discoveries are reviewed.

   nucl-exhep-exPoS(2023)·0 citations
2. 02*

   Pole position of $\Lambda (1405)$ measured in $d(K^{-},n)\pi \Sigma$ reactions

   J-PARC E31 Collaboration: S. Aikawa (1)🇯🇵 · S. Ajimura (2)🇯🇵 · T. Akaishi (3)🇯🇵 · H. Asano (4)🇯🇵 · G. Beer (5)🇨🇦 · C. Berucci (6)🇦🇹 · M. Bragadireanu (7)🇷🇴 · P. Buehler (6)🇦🇹 · L. Busso (8 and 9)🇮🇹 · M. Cargnelli (6)🇦🇹 · S. Choi (10)🇰🇷 · C. Curceanu (11)🇮🇹 and 64 other authors

   We measured a set of ${\pi }^{\pm }{\Sigma }^{\mp }$, ${\pi }^0{\Sigma }^0$, and ${\pi }^{-}{\Sigma }^0$ invariant mass spectra below and above the $\bar{K}N$ mass threshold in $K^{-}$-induced reactions on deuteron. We deduced the $S$-wave $\bar{K}N\to \pi \Sigma$ and $\bar{K}N\to \bar{K}N$ scattering amplitudes in the isospin 0 channel in the framework of a $\bar{K}N$ and $\pi \Sigma$ coupled channel. We find that a resonance pole corresponding to $\Lambda (1405)$ is located at 1417.7${}_{-7.4}^{+6.0}$(fitting errors)${}_{-1.0}^{+1.1}$(systematic errors) + $[-26.1_{-7.9}^{+6.0}$(fitting errors)${}_{-2.0}^{+1.7}$(systematic errors)]$i$ MeV/$c^2$, closer to the $\bar{K}N$ mass threshold than the value determined by the Particle Data Group.

   nucl-exPLB(2023)·24 citations
3. 03*

   (Anti)(hyper)nuclei production in small collision systems measured with ALICE at the LHC

   Chiara Pinto (for the ALICE Collaboration)🇩🇪

   The production mechanism of (anti)nuclei in ultrarelativistic hadronic collisions is under intense debate in the scientific community. The description of the experimental measurements is currently based on two competing phenomenological models: the statistical hadronization model and the coalescence approach. Light (anti)nuclei have been extensively measured in small collision systems, namely pp and p--Pb collisions, with ALICE at the LHC. Recent results on the (anti)deuteron production measured in jets and in the underlying event, and in high-multiplicity pp collisions at a center-of-mass energy $\sqrt{s}$ = 13 TeV are discussed in the context of phenomenological models, as they provide new insights on the nucleosynthesis process.

   nucl-exhep-exPoS(2023)·0 citations
4. 04*

   Shape evolution in the rapidly rotating ${}^{140}$Gd nucleus

   H. Pai🇷🇴 · S. Rajbanshi · Somnath Nag · Sajad Ali🇮🇳 · R. Palit🇮🇳 · G. Mukherjee🇮🇳 · F. S. Babra · R. Banik🇮🇳 · Soumik Bhattacharya🇮🇳 · S. Biswas · S. Chakraborty · R. Donthi and 5 other authors

   Ground state band of ${}^{140}$Gd has been investigated following their population in the ${}^{112}$Sn(${}^{35}$Cl,~$\alpha$p2n)${}^{140}$Gd reaction at 195 MeV of beam energy using a large array of Compton suppressed HPGe clovers as the detection setup. Apart from other spectroscopic measurements, level lifetimes of the states have been extracted using the Doppler Shift Attenuation Method. Extracted quadrupole moment along with the pairing independent cranked Nilsson-Strutinsky model calculations for the quadrupole band reveal that the nucleus preferably attains triaxiality with $\gamma$ = -30${}^{\circ }$. The calculation though shows a slight possibility of rotation around the longest possible principal axis at high spin $\sim$ 30$\hslash$ which is beyond the scope of the present experiment.

   nucl-exnucl-th0 citations
5. 05*

   The Solenoidal Large Intensity Device (SoLID) for JLab 12 GeV

   John Arrington🇺🇸 · Jay Benesch🇺🇸 · Alexandre Camsonne🇺🇸 · Jimmy Caylor🇺🇸 · Jian-Ping Chen🇺🇸 · Silviu Covrig Dusa🇺🇸 · Alexander Emmert🇺🇸 · George Evans🇺🇸 · Haiyan Gao🇺🇸 · J. Ole Hansen🇺🇸 · Garth M. Huber🇨🇦 · Sylvester Joosten🇺🇸 and 19 other authors

   The Solenoidal Large Intensity Device (SoLID) is a new experimental apparatus planned for Hall A at the Thomas Jefferson National Accelerator Facility (JLab). SoLID will combine large angular and momentum acceptance with the capability to handle very high data rates at high luminosity. With a slate of approved high-impact physics experiments, SoLID will push JLab to a new limit at the QCD intensity frontier that will exploit the full potential of its 12 GeV electron beam. In this paper, we present an overview of the rich physics program that can be realized with SoLID, which encompasses the tomography of the nucleon in 3-D momentum space from Semi-Inclusive Deep Inelastic Scattering (SIDIS), expanding the phase space in the search for new physics and novel hadronic effects in parity-violating DIS (PVDIS), a precision measurement of $J/\psi$ production at threshold that probes the gluon field and its contribution to the proton mass, tomography of the nucleon in combined coordinate and momentum space with deep exclusive reactions, and more. To meet the challenging requirements, the design of SoLID described here takes full advantage of recent progress in detector, data acquisition and computing technologies. In addition, we outline potential experiments beyond the currently approved program and discuss the physics that could be explored should upgrades of CEBAF become a reality in the future.

   nucl-exhep-phphysics.ins-detJ.Phys.G(2023)·72 citations
6. 06*

   Fluctuations of conserved charges in hydrodynamics and molecular dynamics

   Volodymyr Vovchenko🇺🇸

   I present an overview of recent theoretical results on fluctuations of conserved charges in heavy-ion collisions obtained in relativistic hydrodynamics and molecular dynamics frameworks. In particular, I discuss the constraints on the location of the QCD critical point based on comparisons of experimental data on proton number cumulants with precision calculations of non-critical contributions. Recent developments on critical fluctuations in molecular dynamics simulations are covered as well.

   ↳ nucl-thhep-phnucl-exEPJ Web Conf.(2023)·0 citations
7. 07*

   The Development of the NNBAR Experiment

   F. Backman🇸🇪 · J. Barrow🇺🇸 · Y. Beßler🇩🇪 · A. Bianchi🇸🇪 · C. Bohm🇸🇪 · G. Brooijmans🇺🇸 · L. J. Broussard🇺🇸 · H. Calen🇸🇪 · J. Cederkäll🇸🇪 · J. I. M. Damian🇸🇪 · E. Dian🇭🇺 · D. D. Di Julio🇸🇪 and 31 other authors

   The NNBAR experiment for the European Spallation Source will search for free neutrons converting to antineutrons with a sensitivity improvement of three orders of magnitude compared to the last such search. This paper describes progress towards a conceptual design report for NNBAR. The design of a moderator, neutron reflector, beamline, shielding and annihilation detector is reported. The simulations used form part of a model which will be used for optimisation of the experiment design and quantification of its sensitivity.

   ↳ physics.ins-dethep-exnucl-exJINST(2022)·16 citations
8. 08*

   dmscatter: A Fast Program for WIMP-Nucleus Scattering

   Oliver Gorton🇺🇸 · Calvin Johnson🇺🇸 · Changfeng Jiao🇺🇸 · Jonathan Nikoleyczik🇺🇸

   Recent work, using an effective field theory framework, has shown the number of possible couplings between nucleons and the dark-matter-candidate Weakly Interacting Massive Particles (WIMPs) is larger than previously thought. Inspired by an existing Mathematica script that computes the target response, we have developed a fast, modern Fortran code, including optional OpenMP parallelization, along with a user-friendly Python wrapper, to swiftly and efficiently explore many scenarios, with output aligned with practices of current dark matter searches. A library of most of the important target nuclides is included; users may also import their own nuclear structure data, in the form of reduced one-body density matrices. The main output is the differential event rate as a function of recoil energy, needed for modeling detector response rates, but intermediate results such as nuclear form factors can be readily accessed.

   ↳ nucl-thastro-ph.COhep-phnucl-exComput.Phys.Commun.(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.