Hadron in Nucleus 2025 (HIN25)

Session

Plenary Session

Apr 2, 2025, 9:30 AM

Panasonic Hall (Yukawa Institute for Theoretical Physics, Kyoto University)

Conveners

Plenary Session

• Satoru Hirenzaki (Nara Women's University)

Plenary Session

• Satoru Hirenzaki (Nara Women's University)

Plenary Session

• Yoshimasa Hidaka (YITP)

Plenary Session

• Hiroyuki Fujioka (Institute of Science Tokyo)

Plenary Session

• Kenta Itahashi (RIKEN)

Plenary Session

• Hiroyuki Fujioka (Institute of Science Tokyo)

Plenary Session

• Hiroyuki Fujioka (Institute of Science Tokyo)

3. [KEYNOTE] Toward Understanding Dense QCD Matter

Yoshimasa Hidaka (YITP)

4/2/25, 9:30 AM

I will overview the role of symmetries and vacuum structure of QCD in understanding strongly interacting matter. I will focus on the phenomenon of spontaneous chiral symmetry breaking and examine how it affects hadron properties. After discussing insights from finite-temperature QCD, I will address the current theoretical challenges in the dense regime, including the sign problem, and...

4. Heavy meson properties in dense matter: the Tcc(3875) and Ds0*(2317) cases (invited talk)

Laura Tolos (ICE (CSIC, Barcelona))

4/2/25, 10:00 AM

We discuss the modification of the properties of heavy mesons under extreme conditions of density present in heavy-ion collisions at CBM/FAIR energies. We pay a special attention to the behavior of Tcc(3875) and Ds0(2317) as well as their corresponding antiparticles in a dense nuclear environment, so as to show that the charge-conjugation asymmetry in nuclear matter could become an interesting...

5. Chiral symmetry and hadrons in matter (invited talk)

Su Houng Lee (Yonsei University)

4/2/25, 11:00 AM

We summarize the relationship between chiral symmetry breaking and the masses of hadrons. Next, we discuss the behavior of vector mesons in matter. Finally, we demonstrate why K1 and K* are appropriate chiral partners that can be realistically measured in experiments.

6. Quark, Diquark and Baryon in Chiral Symmetry (invited talk)

Makoto Oka (RIKEN Nishina Center)

4/2/25, 11:30 AM

7. Femtoscopy with hyperons as a gateway to study neutron stars (invited talk)

Dimitar Mihaylov (Technical University of Munich)

4/2/25, 12:00 PM

Femtoscopy is a powerful technique for studying final-state interactions between hadrons, employing two- and three-body correlations to analyze the emission source and final-state interactions of particles with low relative momentum. Recent research by the ALICE collaboration has demonstrated the realization of a common baryon-baryon emission source in pp collisions, opening new avenues for...

23. [KEYNOTE] Hadron-Hadron Interactions from Lattice QCD

Tetsuo Hatsuda (RIKEN iTHEMS)

4/3/25, 9:00 AM

I will summarize recent progress in the study of hadron-hadron interactions using lattice QCD near the physical pion mass (146 MeV), focusing on the HAL QCD method and its connection to experimental data. In particular, we highlight several key interaction channels: (i) Baryon-Baryon Interactions in the S=-2 sector, (ii) Meson-Meson Interactions in the D*-D (Tcc) channel, and (iii)...

24. Hyperon potentials in dense matter from chiral EFT evaluated via heavy-ion collisions (invited talk)

Asanosuke Jinno (Kyoto University)

4/3/25, 9:30 AM

The hyperon single-particle potential (hyperon potential) is a key ingredient for discussing the properties of hyperons in a dense environment, including their existence in neutron stars. In this talk, we will introduce the hyperon potential in nuclear matter based on the baryon forces within modern chiral effective field theory. We will then discuss the validity of these potentials by...

25. Λp scattering experiment at BL33LEP in SPring-8 (invited talk)

Dr Takuya Nanamura (Tohoku University)

4/3/25, 10:00 AM

Hyperon-proton scattering experiment is one of the most direct methods to study the hyperon-nucleon (YN) interaction, as in the case of the NN interaction.
Although it had been experimentally difficult for a long time due to short lifetime of hyperons, we successfully performed high-statistics Σ±p scattering experiment at J-PARC.
More YN scattering data for various channels and observables...

26. H-Dibaryon near Lambda Lambda and Xi- p Thresholds (invited talk)

Jung Keun Ahn (Korea University)

4/3/25, 10:30 AM

This talk will cover preliminary results from E42 on the H-dibaryon search near the Lambda Lambda and Xi- p mass thresholds. The E42 has collected nearly seven thousand Lambda Lambda production events from (K-, K+) reactions off 12C at 1.8 GeV/c. We are approaching the final stage of data anlysis to open the box. The presentation will discuss the nature of the H-dibaryon with only a small...

27. Constraints from hypernuclei on a deeply bound H dibaryon (invited talk)

Avraham Gal (Racah Inst. Phys., Hebrew University, Jerusalem)

4/3/25, 11:00 AM

"Treating the NAGARA emulsion event in a realistic L-L-4He three-body model, it is found that the LL6He -> H + 4He strong-interaction lifetime becomes much longer than hypernuclear weak-interaction decays for H dibaryon mass below m(L)+m(n), so that a deeply bound H is not in conflict with hypernuclear data.

Using EFT methods, it is found that the H -> nn weak-decay lifetime
for m(H) <...

45. Theoretical studies of $\eta^\prime$ mesic nuclei formation and $\eta^\prime N$ interaction

Natsumi Ikeno

4/3/25, 4:30 PM

We study theoretically the feasibility of the semi-exclusive $^{12}$C($p,dp$)$X$ reaction for the observation of $\eta^\prime$ mesic nuclei using the transport model JAM. The semi-exclusive measurements of the ($p,d$) reaction with protons from $\eta^\prime$ absorption are found to be significant for the observation of the $\eta^\prime$ bound states.
Especially, the measurements of the...

46. Experimental search for η'-mesic nuclei by missing-mass spectroscopy in 12C(p,dp) reaction with the WASA detector at GSI-FRS (invited talk)

Ryohei Sekiya (Kyoto University, RIKEN)

4/3/25, 4:50 PM

The $\eta^{\prime}$ meson has an extraordinary large mass among the light pseudo-scalar meson nonet.
The large mass is considered to originate from the non-trivial vacuum structure associated with chiral symmetry breaking and the axial U(1) anomaly in the QCD.
In a nuclear medium, where the chiral symmetry is partially restored, the mass reduction of the $\eta^{\prime}$ meson is predicted by...

44. Gluons in the etaprime-nucleon and etaprime-nucleus systems (invited talk,remote)

Steven Bass (Jagiellonian University in Krakow, Kitzbühel Centre for Physics)

4/3/25, 5:20 PM

Gluonic effects are important in etaprime physics. In this talk I shall discuss the role of gluonic degrees of freedom in possible etaprime bound states in nuclei as well as in the etaprime-nucleon interaction. If experiments see evidence for an etaprime bound state, how do we interpret that it in terms of gluon related parameters? Might the possible very narrow and close to threshold...

51. in memory of Prof. Toshimitsu Yamazaki

Kenta Itahashi (RIKEN)

4/4/25, 9:00 AM

52. [KEYNOTE] A consideration on KbarN and KbarNN quasi-bound states found in the kaon-induced reactions on deuteron and helium-3

Hiroyuki Noumi (RCNP, Osaka University)

4/4/25, 9:20 AM

Recently, experimental studies of the kaon-induced reactions on deuteron and helium-3 were carried out at J-PARC. The former experiment reported a resonance pole below the KbarN mass threshold in the deduced S-wave KbarN scattering amplitude in the isospin = 0 channel [1]. The pole is naturally interpreted as a KbarN bound state. The latter experiment reported a bump structure below the KbarNN...

53. Prospects of kaonic nuclei and kaonic atoms at J-PARC (invited talk)

TADASHI HASHIMOTO (RIKEN)

4/4/25, 9:50 AM

Anti-kaon is one of the promising candidates for forming mesic nuclear-bound states. After many experimental efforts, we have finally found the simplest state, the so-called “K-pp”, via the K- induced nucleon knockout reaction on helium-3. The validity of this reaction is also verified by the Lambda(1405) study using a deuterium target. Now, we are developing a new detector system to further...

54. Building a Model to Understand the Singular Behavior of the Kbar N Potential in the HAL QCD Method

Takayasu Sekihara (Kyoto Prefectural University)

4/4/25, 10:20 AM

The HAL QCD method has been established as a reliable method to study hadron-hadron interactions. However, singular behavior around the origin has been observed in the Kbar N potential, which dynamically generates the Lambda(1405) as the bound state. In order to clarify the cause of such behavior in the HAL QCD method, we calculate the NBS wave functions and R correlators in an effective...

55. The quest for kaonic atoms’ measurements: technological challenges and future perspectives

Alessandro Scordo

4/4/25, 11:00 AM

The precise measurements of X-ray emissions from kaonic atoms represent one of the most valuable contributions to our knowledge of low-energy strangeness strong interactions.
The SIDDHARTA Collaboration at the INFN Laboratories of Frascati, thanks to the powerful combination of the unique low-momentum Kaon beam delivered by the DAΦNE e+e- collider and the implementation of cutting-edge X-ray...

56. Re-analysis of spectral modification in nuclei using the PHSD transport approach

Masaya Ichikawa (JAEA)

4/4/25, 11:30 AM

In the KEK-PS E325 experiment, significant modification of the spectra of $\phi$ mesons in/out nuclei were observed and parameters for the spectral modification were derived.
In the present analysis, these parameters were reanalyzed using the PHSD transport approach, with more detailed simulations.
In this talk, the analysis methods and preliminary results will be discussed.

59. Test the molecular picture of the X(3872) in $\bar B_{(s)} \to \bar K^{(*)} (\eta,\eta',\phi) X $ decays

Wei-Hong Liang (Guangxi Normal University)

4/4/25, 3:15 PM

We study the decays $\bar B^0 \to \bar K^0 \, X$, $B^- \to K^- \, X$, $\bar B^0_s \to \eta (\eta')\, X$, $\bar B^0 \to \bar K^{*0} \, X$, $B^- \to K^{*-} \, X$ , $\bar B_s^0 \to \phi \, X$, with $X \equiv X(3872)$, from the perspective of the $X(3872)$ being a molecular state made from the interaction of the $D^{*+} D^-, D^{*0} \bar D^0$ and $c.c.$ components. We consider both the external and...

69. High precision hypernuclear mass measurement with decay pion spectroscopy --from MAMI to JLab-- (invited talk)

Sho Nagao (University of Tokyo)

4/4/25, 3:40 PM

Hypernucleus is a many-body system with strangeness and is an important probe for discussing nuclear matter based on SUf(3).
In recent years, there have been significant advancements in experimental and theoretical studies for few-body hypernuclei. Discussions of the charge symmetry breaking effect and Sigma mixing effect are currently underway.

72. J-PARC Hadron Hall Extension Project (invited talk)

Fuminori Sakuma (RIKEN)

4/4/25, 4:10 PM

The J-PARC Hadron Experimental Facility was established to investigate the origin and evolution of matter in the universe through experiments utilizing the world’s most intense particle beams. Over the past decade, the facility has made significant advancements in particle and nuclear physics. To further expand its research scope and explore uncharted areas of physics, an extension of the...

70. K-Long Facility at Jefferson Lab

Igor Strakovsky (The George Washington University)

4/4/25, 4:40 PM

The outline of K-long Facility (KLF) at Jefferson Lab will be presented. It has been approved by PAC48 to run for 200 days of the beamtime to measure CQM and LQCD predicted but not established dozens of hyperon states. This facility also allows to study hyperons in nuclei.

71. Photon beams at SPring-8-II

Takatsugu Ishikawa

4/4/25, 5:05 PM

We have been conducting hadron physics experiments using laser-induced Compton-scattering photons at SPring-8 with a circulating energy of 8 GeV. To have 100 times the brightness of the synchrotron radiation, SPring-8 will be upgraded to SPring-8-II. Owing to this modification, the coverage of incident photon energies drastically changes. We will present the expected photon beams at...