Fri·Dec 27, 2024Friday·December 27, 2024

1. 01*

   Probing medium response via strangeness enhancement around quenched jets

   Ao Luo🇨🇳 · Shanshan Cao🇨🇳 · Guang-You Qin🇨🇳

   Jet-induced medium excitation is a crucial part of jet interactions with the quark-gluon plasma (QGP) in relativistic heavy-ion collisions, and has recently been confirmed by experiment for the first time. Based on the AMPT model simulation, we propose the strangeness enhancement around quenched jets as a novel signature of jet-induced medium excitation. By applying the jet-particle correlation techniques, we calculate jet-induced particle yields around the jets and find a significant enhancement of the strange-to-non-strange-hadron ratio and the double-to-single-strange-hadron ratio correlated with jets in relativistic nucleus-nucleus collisions relative to proton-proton collisions. This enhancement increases with both the strength of jet-QGP interactions and the radial distance from jet axis. These observations align with the features of jet-induced medium excitation and parton coalescence in hadron formation, and await experimental validation in the future measurements.

   ↳ nucl-thhep-phnucl-exPLB(2025)·3 citations
2. 02*

   Statistical research on determining sensitivity of neutrinoless double beta decays

   Haoyang Fu🇨🇳 · Wentai Luo🇨🇳 · Xiangpan Ji🇨🇳 · Shaomin Chen🇨🇳

   The determination of experimental sensitivity is a key step in the search for neutrinoless double beta decay ($0\nu \beta \beta$), providing a quantitative benchmark for detector design. Two commonly used statistical approaches are the counting method, which estimates sensitivity from the number of events in a predefined region of interest, and the fitting method, which extracts the signal contribution by fitting the full energy spectrum. In this work, we investigate both discovery sensitivity and exclusion sensitivity within these two approaches. Through statistical derivation and simulation verification, we show that the relative performance of the methods depends on both energy resolution and exposure, while at higher exposures the fitting method consistently yields more stringent sensitivity. These results provide guidance for selecting the optimal statistical method in future $0\nu \beta \beta$ experiments.

   ↳ physics.ins-dethep-exnucl-exJINST(2025)·2 citations
3. 03*

   Moments from Momentum Derivatives in Lattice QCD

   Zhuoyi Pang🇨🇳 · Jian-Hui Zhang🇨🇳 · Dian-Jun Zhao🇨🇳

   We show that the traditional moments approach in lattice QCD, based on operator product expansion (OPE), can be realized in a way that utilizes derivatives in momentum rather than in distance. This also avoids power divergent mixings, and thus allows to extract moments order by order, to all orders in principle. Moreover, by exploiting the symmetry of lattice matrix elements,we can determine the even and odd moments separately. As a demonstrative example, we determine the first three moments beyond the tensor charge gT of the isovector quark transversity distribution in the nucleon.

   ↳ hep-lathep-phhep-thnucl-ex+1CPC(2025)·5 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.