Tue·Aug 17, 2021Tuesday·August 17, 2021

1. 01*

   $\text{Direct}Q\text{-Value Determination of the}{\beta }^{-}\text{Decay of}{}^{187}\text{Re}$

   P. Filianin🇩🇪 · C. Lyu🇩🇪 · M. Door🇩🇪 · K. Blaum🇩🇪 · W. J. Huang · M. Haverkort · P. Indelicato · C. H. Keitel🇩🇪 · K. Kromer🇩🇪 · D. Lange🇺🇸 · Y. N. Novikov🇷🇺 · A. Rischka🇩🇪 and 6 other authors

   The cyclotron frequency ratio of ${}^{187}{\mathrm{Os}}^{29+}$ to ${}^{187}{\mathrm{Re}}^{29+}$ ions was measured with the Penning-trap mass spectrometer PENTATRAP. The achieved result of $R=1.000000013882(5)$ is to date the most precise such measurement performed on ions. Furthermore, the total binding-energy difference of the 29 missing electrons in Re and Os was calculated by relativistic multiconfiguration methods, yielding the value of $\Delta E=53.5(10)$ eV. Finally, using the achieved results, the mass difference between neutral ${}^{187}$Re and ${}^{187}$Os, i.e., the $Q$ value of the ${\beta }^{-}$ decay of ${}^{187}$Re, is determined to be 2470.9(13) eV.

   nucl-exPRL(2021)·30 citations
2. 02*

   Scaling behaviors of heavy flavor meson suppression and flow in different nuclear collision systems at the LHC

   Shu-Qing Li🇨🇳 · Wen-Jing Xing🇨🇳 · Xiang-Yu Wu🇨🇳 · Shanshan Cao🇨🇳 · Guang-You Qin🇨🇳

   We explore the system size dependence of heavy-quark-QGP interaction by studying the heavy flavor meson suppression and elliptic flow in Pb-Pb, Xe-Xe, Ar-Ar and O-O collisions at the LHC. The space-time evolution of the QGP is simulated using a (3+1)-dimensional viscous hydrodynamic model, while the heavy-quark-QGP interaction is described by an improved Langevin approach that includes both collisional and radiative energy loss inside a thermal medium. Within this framework, we provides a reasonable description of the $D$ meson suppression and flow coefficients in Pb-Pb collisions, as well as predictions for both $D$ and $B$ meson observables in other collision systems yet to be measured. We find a clear hierarchy for the heavy meson suppression with respect to the size of the colliding nuclei, while their elliptic flow coefficient relies on both the system size and the geometric anisotropy of the QGP. Sizable suppression and flow are predicted for both $D$ and $B$ mesons in O-O collisions, which serve as a crucial bridge of jet quenching between large and small collision systems. Scaling behaviors between different collision systems are shown for heavy meson suppression factor and the bulk-eccentricity-rescaled heavy meson elliptic flow as functions of the number of participant nucleons in heavy-ion collisions.

   ↳ hep-phnucl-exnucl-thEPJC(2021)·28 citations
3. 03*

   Dynamics of in-medium quarkonia in SU(3) and SU(2) gauge theories

   Yukinao Akamatsu🇯🇵 · Masayuki Asakawa🇯🇵 · Shiori Kajimoto🇯🇵

   Decoherence dynamics of quarkonia is studied in the high-temperature deconfined phase of SU($N_c$) gauge theories. In particular, we analyze the symmetry properties of SU($N_c$) stochastic potential model and find a novel "event-by-event" symmetry for $N_c=2$ case, similar to the $G$-parity of hadronic systems. This novel symmetry constrains the relation between diagonal and off-diagonal components of quarkonium density matrix, leaving the latter to be finite at late times. We also present one-dimensional numerical simulation of the model, which indicates the usefulness of the complex potential simulations for the quarkonium survival probabilities in relativistic heavy-ion collisions, provided that the effect of dissipation can be neglected.

   ↳ nucl-thcond-mat.quant-gashep-phnucl-ex+1PRD(2022)·15 citations
4. 04*

   Holographic charm and bottom pentaquarks II: Open and hidden decay widths

   Yizhuang Liu🇵🇱 · Maciej A. Nowak🇵🇱 · Ismail Zahed🇺🇸

   We analyze the decay modes of the three $[\frac{1}{2}{\frac{1}{2}}^{-}{]}_{S=0,1}$ and $[\frac{1}{2}{\frac{3}{2}}^{-}{]}_{S=1}$ non-strange pentaquarks with hidden charm and bottom, predicted by holographic QCD in the heavy quark limit. In leading order, the pentaquarks %are composed of heavy-light mesons in bulk bound to an instanton core. They are degenerate and stable by heavy quark symmetry. At next to leading order, the spin interactions lift the degeneracy and cause the pentaquarks to decay. We show that the open charm (bottom) decay modes dwarf the hidden charm (bottom) ones, with total widths that are consistent with those recently reported by LHCb for charm pentaquarks. Predictions for bottom pentaquarks are given.

   ↳ hep-phhep-thnucl-exnucl-thPRD(2021)·16 citations
5. 05*

   Resummation of the Sivers asymmetry in heavy flavor dijet production at the Electron-Ion Collider

   Zhong-Bo Kang🇺🇸 · Jared Reiten🇺🇸 · Ding Yu Shao🇨🇳 · John Terry🇺🇸

   We review our transverse momentum dependent factorization and resummation formalism for heavy flavor dijet production at the EIC. In this formalism, we have calculated the heavy flavor mass corrections in the collinear-soft and jet functions, and in the resummed expression for the cross section. By establishing this formalism, we then study the effects of the mass corrections by providing predictions at the EIC for the massive case and for the case where the mass is neglected. We find that the heavy flavor mass effects can give sizable corrections to the predicted asymmetry.

   ↳ hep-phhep-exnucl-exnucl-thSciPost Phys.Proc.(2022)·0 citations
6. 06*

   The angular correlation between the fission fragment intrinsic spins

   Aurel Bulgac🇺🇸

   The generation of fission fragments (FF) spins and of their relative orbital angular momentum has been debated for more than six decades and no consensus has been yet achieved so far. (The published abstract, being too long, can be found in the manuscript.)

   ↳ nucl-thnucl-exquant-phPRC(2022)·21 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.