Wed·Nov 29, 2023Wednesday·November 29, 2023

1. 01*

   Variation of multi-Slater determinants in antisymmetrized molecular dynamics and its application to ${}^{10}$Be with various clustering

   Takayuki Myo🇯🇵 · Mengjiao Lyu🇨🇳 · Qing Zhao🇨🇳 · Masahiro Isaka🇯🇵 · Niu Wan🇨🇳 · Hiroki Takemoto🇯🇵 · Hisashi Horiuchi🇯🇵

   We propose a method to optimize the multi-Slater determinants of the antisymmetrized molecular dynamics (AMD) in the linear combination form and apply it to the neutron-rich ${}^{10}$Be nucleus. The individual Slater determinants and their weights in the superposition are determined simultaneously according to the variational principle of the energy of the total wave function. The multi-AMD basis states of ${}^{10}$Be show various cluster structures as well as the shell-model type. In the cluster configurations, different intercluster distances are superposed automatically indicating the role of the generator coordinates. We further introduce a procedure to obtain the configurations for the excited states imposing the orthogonal condition to the ground-state configurations. In the excited states of ${}^{10}$Be, the linear-chain-like structure is confirmed consisting of various clusters. The energy spectrum using the obtained basis states reproduces the experiments. The present framework can be the method to find the optimal multi-configuration for nuclear ground and excited states.

   ↳ nucl-thnucl-exPRC(2023)·16 citations
2. 02*

   Going Big for Phase III of the Project 8 Neutrino Mass Experiment

   Juliana Stachurska (for the Project 8 Collaboration)🇺🇸

   Project 8 is a next generation experiment aiming to directly measure the neutrino mass using the tritium endpoint method with a targeted sensitivity of 40 meV. Having established a new measuring technique, Cyclotron Radiation Emission Spectroscopy (CRES), the next development phase will demonstrate CRES on a large source volume, culminating in a pilot-scale CRES experiment with atomic tritium. A promising option is a mode-filtered, cylindrical, resonant cavity in which cyclotron radiation from magnetically trapped beta electrons only couples to the lowest eigenmode, maximizing effective volume and minimizing signal complexity. Recent progress in the experiment design, including a small scale cavity CRES proof-of-concept apparatus to demonstrate CRES in cavities and its scalability to large volumes are described.

   ↳ physics.ins-detnucl-exPoS(2024)·2 citations
3. 03*

   Exotic nonaxial-octupole shapes in $N=184$ isotones from covariant density functional theories

   Jie Zhao · Zheng-Gang Wu🇨🇳

   The nonaxial octupole shape in some nuclei with $N=184$, namely, ${}^{284}$Fm, ${}^{286}$No, ${}^{288}$Rf, and ${}^{290}$Sg, is investigated using covariant density functional theories. Employing the density-dependent point-coupling covariant density functional theory with the parameter set DD-PC1 in the particle-hole channel, it is found that the ground states of ${}^{284}$Fm, ${}^{286}$No, ${}^{288}$Rf, and ${}^{290}$Sg have pure nonaxial octupole shapes with deformation parameters ${\beta }_{31}\approx 0.08$ and ${\beta }_{33}\approx -0.01\sim -0.03$. The energy gain due to the ${\beta }_{31}$ and ${\beta }_{33}$ distortion is $\sim$ 1 MeV. The occurrence of the nonaxial octupole correlations is mainly from the proton orbitals $1i_{13/2}$ and $2f_{7/2}$, which are close to the proton Fermi surface. The dependence of the nonaxial octupole effects on the form of the energy density functional and on the parameter set is also studied.

   ↳ nucl-thnucl-exPRC(2024)·7 citations
4. 04*

   Transverse Energy-Energy Correlators in the Color-Glass Condensate at the Electron-Ion Collider

   Zhong-Bo Kang🇺🇸 · Jani Penttala🇺🇸 · Fanyi Zhao🇺🇸 · Yiyu Zhou🇺🇸

   We investigate the transverse energy-energy correlators (TEEC) in the small-$x$ regime at the upcoming Electron-Ion Collider (EIC). Focusing on the back-to-back production of electron-hadron pairs in both $ep$ and $eA$ collisions, we establish a factorization theorem given in terms of the hard function, quark distributions, soft functions, and TEEC jet functions, where the gluon saturation effect is incorporated. Numerical results for TEEC in both $ep$ and $eA$ collisions are presented, together with the nuclear modification factor $R_A$. Our analysis reveals that TEEC observables in deep inelastic scattering provide a valuable approach for probing gluon saturation phenomena. Our findings underscore the significance of measuring TEEC at the EIC, emphasizing its efficacy in advancing our understanding of gluon saturation and nuclear modifications in high-energy collisions.

   ↳ hep-phhep-exnucl-exnucl-thPRD(2024)·23 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.