PaperPanorama

Nuclear Experiment·nucl-ex

Mon·Jul 27, 2026

4 papers—1 primary·3 cross-listed

All4Primary1Cross-lists3
  1. 01

    The future fixed-target program at the CERN SPS

    Enrico Scomparin🇮🇹

    The CERN Super Proton Synchrotron (SPS) can currently accelerate heavy ions in the energy range from 13.5 up to 150 A GeV and deliver them to fixed-target experiments. It is the facility where Quark-Gluon Plasma (QGP) experimental studies began in 1986. After a first phase until 2000, with several fundamental discoveries made by a number of dedicated experiments, the physics program continued until today with the NA60 (dileptons, 2003-2004) and NA61 (hadronic observables, from 2009) experiments. As of today, a continuation of QGP studies, after the current shutdown of CERN accelerators, is foreseen, involving NA61 and a newly approved experiments, NA60+/DiCE. In this contribution, I will briefly describe the main achievements of the CERN SPS program, discuss the proposed new measurements and their impact on our knowledge of the QGP in the finite region of the QCD phase diagram.

    nucl-exhep-ex0 citations
  2. 02

    Lattice study of spin interactions between heavy quarks in the quark-gluon plasma

    Dibyendu Bala🇩🇪 · Olaf Kaczmarek🇩🇪 · Sayantan Sharma🇮🇳 · Swagatam Tah🇮🇳

    We calculate the spin-dependent potential, which is the correction term to the thermal potential between a static quark-antiquark pair within non-relativistic QCD. At leading order in hard thermal loop perturbation theory, we show that this spin-dependent potential has an imaginary part which is different in magnitude for pseudoscalar and vector quarkonium states. For the first time, we extract the imaginary part non-perturbatively using lattice techniques, in the deconfined phase of quenched QCD at MeV, after performing a continuum estimation and subsequent renormalization. We have found that the spin-dependent potential in the quark-gluon plasma phase is complex, and its imaginary part has a remarkably significant contribution over the thermal static potential for charmonium states. Consequences of this thermal spin-dependent potential on the quarkonium spectral functions are also discussed.

    ↳ hep-lathep-phnucl-exnucl-th0 citations
  3. 03

    Revisiting Quark Confinement in the Proton through the Force on Quarks

    Ji-Xin Yu🇨🇳 · Ao-Sheng Xiong🇨🇳 · Ji Xu🇨🇳 · Fu-Sheng Yu🇨🇳 · Yong Zheng🇨🇳

    Quark confinement, the fact that colored quarks are permanently bound inside color-neutral hadrons and have never been observed as isolated particles, remains one of the central issues of the Standard Model. Recently, Ji et al.\,\cite{Ji:2026lyj} proposed a framework to define and measure the force on quarks in the proton, obtaining strong evidence for a net confining force and thus opening a new perspective on the study of confinement. In this work, we improve this analysis by incorporating light-cone QCD sum rule results to supplement the limited experimental and lattice QCD information in the large- region. We further formulate the reconstruction of the quark force as a regularized inverse problem, thereby reducing the model dependence associated with the prescribed functional parametrizations used before. The resulting quark force provides a complementary, less parametrization-dependent determination and remains consistent with that implied by a linear QCD potential, which also supports the robustness of the framework proposed in Ref.\,\cite{Ji:2026lyj}. We also show that improved future inputs can substantially reduce the uncertainty in the reconstructed quark force.

    ↳ hep-phhep-exhep-latnucl-ex0 citations
  4. 04

    Gamma spectrometry with CsI(Tl), NaI(Tl) and CdWO4 scintillation crystals using a silicon photomultiplier

    R. Yu. Chaplynskyi · F. A. Danevich🇺🇦 · D. V. Kasperovych🇺🇦 · V. R. Klavdiienko · V. V. Kobychev🇺🇦 · E. E. Petrosian · A. R. Podviianiuk · R. B. Podviianiuk · O. G. Polischuk🇺🇦

    This study investigated using of silicon photomultiplier (SiPM) for scintillation {\gamma}-spectrometry with CdWO4, CsI(Tl), and NaI(Tl) crystal scintillators. At room temperature, CsI(Tl) crystal scintillator provides the best performance, while the achievable energy resolution is lower compared to that obtained with conventional photomultiplier tube (PMT) with green-enhanced photocathode. These findings highlight the potential of SiPMs as a compact and cost-effective alternative to PMTs in nuclear physics applications, particularly for light portable spectrometers, such as radiation monitoring systems based on small unmanned aerial vehicles.

    ↳ physics.ins-detnucl-exNucl.Phys.Atom.Energy(2026)·0 citations

Affiliations

first authorsco-authorsvia INSPIRE