Welcome

Measurement of Hadronic Cross Sections for Proton and Nuclei in Space with the DAMPE Experiment

• Yifeng Wei 魏逸丰 (University of Science and Technology of China)

Status and Prospects of the LHCf experiment

• Hiroaki Menjo (Nagoya University)

Precise knowledge of high energy hadronic interaction is an important key to understand air shower development. The LHCf experiment measures neutral particles such as photons, neutral pions, and neutrons, produced in the very forward region of LHC collisions, which contribute to the air shower development. Since the LHC start, LHCf performed many operations with pp collisions at several collision energies from 0.9 to 13.6 TeV and pPb. In addition, we will have an operation with proton-oxygen collisions scheduled in this July. In this talk, we will present the results and prospects from the obtained data the as well as for proton-oxygen collision data.

EPOS: a comprehensive MC for high-energy collisions from pp, pA to AA

• Klaus Werner

Forward Hadron Productions in proton-nucleus collisions at NLO

• Bowen Xiao

Forward Particle Production in pA Collisions

• Xiaohui Liu (Beijing Normal University)

I will emphasize the necessity of the soft mode in the small-x formalism for producing correctly the poles and for carrying out resummation.

Parton Shower Algorithm Incorporating Saturation Effects

• Jian Zhou

HIJING: a MC model for particle and jet production in pp, pA and AA collisions

• Wei-tian Deng

Hadrons from a Multi-Phase Transport Model

• Zi-Wei Lin (East Carolina University)

The goal of a multi-phase transport (AMPT) model is to provide a kinetic theory description of all essential stages of relativistic nuclear collisions. Here I will first introduce the AMPT model including its structure and selected earlier results. I will then discuss the recent puzzle on baryon stopping from RHIC, which affects the yield and rapidity distributions of net-baryons. Finally, I will show new results of p+O collisions from AMPT at energies relevant to LHAASO, including the rapidity distributions of various hadrons and the effect of baryon stopping modeling on protons at large rapidities.

Dai-mei Zhou- A Brief Introduction to PACIAE 4.0

• Dai-mei Zhou

EPOS Updates

• Tanguy Pierog

Investigation of hadronic interaction models through muon content analysis in EAS with the LHAASO-KM2A

• Xiaoting Feng (Shandong University)

This study investigates hadronic interaction models through a detailed analysis of muon content in extensive air showers (EAS) using the LHAASO-KM2A detector. The primary objective is to evaluate the consistency of muon production predictions from three hadronic interaction models (EPOS-LHC, QGSJET-II-04, and SIBYLL 2.3d) and spectral models (Gaisser H3a, Horandel, GSF, and LHAASO spectrum) against experimental data. Data collected between August 2021 and December 2023 from the full LHAASO-KM2A array are analyzed, covering cosmic ray energies from 300 TeV to 30 PeV. Key measurements include the muon content, its lateral distribution, relative fluctuations, and attenuation length. Comparisons between MC predictions and data highlight discrepancies in existing models, particularly in their treatment of muon production at ultra-high energies. These findings underscore the necessity of refining hadronic interaction models to better align with experimental observations, thereby enhancing the accuracy of cosmic ray composition studies and EAS simulations. This work contributes to resolving long-standing challenges in high-energy astrophysics, and validates LHAASO-KM2A’s capabilities in advancing our understanding of cosmic ray interactions.

Preliminary results of using LHAASO to test high-energy hadron interaction models

• Zhiyong You 游智勇

The LHAASO experiment can measure muons and parameters related to the shower maximum in an extensive air shower. These parameters depend on the assumptions of the hadronic interaction model. This study uses parameters measured by LHAASO experiment to test hadronic interaction models. We will present the preliminary results of the testing of the EPOS-LHC and QGSJETII-04 models using the LHAASO experiment.

Concluding Remarks

Free discussion