Mon·Jan 6, 2025Monday·January 6, 2025

1. 01*

   Studying the Strangeness $D$-Term in Hall C via Exclusive $\varphi$ Electroproduction

   H. T. Klest🇺🇸 · S. Joosten🇺🇸 · H. Szumila-Vance🇺🇸 · W. Armstrong🇺🇸 · F. A. Flor🇺🇸 · B. Kim🇺🇸 · M. H. Kim🇺🇸 · V. Klimenko🇺🇸 · S. Lee🇺🇸 · Z.-E. Meziani🇺🇸 · C. Peng🇺🇸 · N. Pilleux🇺🇸 and 47 other authors

   We propose a measurement of exclusive electroproduction of $\varphi$ mesons near threshold in Hall C. We will measure the |t|-dependence of the exclusive $\varphi$ electroproduction cross section, which has recently been proposed as an observable sensitive to the strangeness $D$-term. The contribution of strangeness to the total $D$-term is presently unknown, with different arguments favoring $D_s$ being large, being small, or even having opposite sign from the total $D$-term. Our exploratory measurement is designed to distinguish between these hypotheses. If $D_s$ turns out to be small, $\varphi$ electroproduction can be used to study the gluon $D$-term. In addition, this dataset will allow us to perform measurements of other exclusive meson final states, including the first measurement of ${\eta }^{\prime }$ electroproduction and multi-differential measurements of $\eta$ and $\omega$ electroproduction.

   nucl-exhep-exhep-ph5 citations
2. 02*

   Forward dijet and vector meson production at the LHC

   C. Royon🇺🇸 · J. Penttala🇺🇸

   We first describe the predictions concerning jet production in the very forward region, especially in the FOCAL kinematic region of the ALICE collaboration at CERN as a test of saturation. We also compare vector meson production cross sections at the LHC in Pb Pb and p Pb collisions with the Balitsky Fadin Kuraev Lipatov and the Balitsky Kovchegov evolution equations and data favor the observation of saturation at the LHC.

   ↳ hep-phhep-exnucl-exnucl-thPoS(2025)·0 citations
3. 03*

   Modification of single-hole-like states by configuration mixing in the ${}^{99-131}$In

   Deepak Patel🇮🇳 · Praveen C. Srivastava🇮🇳 · Noritaka Shimizu🇯🇵 · Yutaka Utsuno🇯🇵

   Large-scale shell-model calculations are performed for the $9/2_{g.s.}^{+}$, $1/2_1^{-}$, $3/2_1^{-}$, and $5/2_1^{-}$ states in the odd-$A$ indium isotopes with $N=50-82$. The calculated energy levels, electromagnetic moments, and spectroscopic factors exhibit remarkable agreement with the experimental data due to significant configuration mixing for the neutron numbers away from the closed shells. The $1/2_1^{-}$ energy levels closely follow the trend of effective single-particle energies, which are determined using the fractional occupancies of neutron orbitals. However, configuration mixing with the proton $p_{3/2}$ and $f_{5/2}$ orbitals in the actual shell-model calculations plays a crucial role in accurately reproducing the positions of the $1/2_1^{-}$ levels, ensuring better agreement with the experimental data across the entire isotopic chain.

   ↳ nucl-thnucl-exPRC(2025)·1 citation

* 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.