Zhen Xie

Design and performance of the Fast Beam Condition Monitor for luminosity and background measurement at the CMS Experiment in LHC Run 3

Eliana Acurio, Ying An, Iakov Andreev, Tomas Atehortua et autres

The Fast Beam Condition Monitor (BCM1F) has been used at the CMS Experiment since the first LHC circulating beams in 2008. Originally meant as a beam-induced background monitor for fast beam losses detection, it showed a potential also for luminosity measurements in …

Analysis of the operation and maintenance of unmanned fluid stations

Qin Tian, Jing Wang, Zhen Xie

Unmanned fluid stations are a critical component of China’s earthquake monitoring system for observing regional geophysical fields. The stable operation and data quality of these stations are significant for regional short-term and imminent earthquake prediction and forecasting. This study systematically analyzed the …

Prospects for observing the microquasar SS 433 with the LACT array

Zhen Xie, Zhipeng Zhang, Ruizhi Yang

ABSTRACT We investigate the observational capabilities of the upcoming Large Array of imaging atmospheric Cherenkov Telescopes (LACT) for the microquasar SS 433 through detailed simulations. Our results indicate that a detection significance of $5\sigma$ can be achieved with approximately 30 h of …

cn (code pays fourni par la source)

Erratum: Layout optimization and performance analysis of large array of imaging atmospheric Cherenkov telescopes [Chin. Phys. C 49, 035001 (2025)]

Zhipeng 张志鹏 Zhang, RuiZhi Yang, Shoushan Zhang, Zhen Xie et autres

Unveiling axion signals in galactic supernovae with future MeV telescopes*

Zhen Xie, Jiahao Liu, Bing Liu, Ruizhi Yang

Abstract Axion-like particles (ALPs) produced via the Primakoff process in the cores of galactic core-collapse supernovae (SNe) could convert into MeV-energy γ-rays through interactions with the magnetic field of the Milky Way. To evaluate the detection prospects for such signals, we perform …

cn (code pays fourni par la source)

Top Ten Challenges Towards Agentic Neural Graph Databases

Jiaxin Bai, Zihao Wang, Yukun Zhou, Hang Yin et autres

Graph databases (GDBs) like Neo4j and TigerGraph excel at handling interconnected data but lack advanced inference capabilities. Neural Graph Databases (NGDBs) address this by integrating Graph Neural Networks (GNNs) for predictive analysis and reasoning over incomplete or noisy data. However, NGDBs rely …

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Layout optimization and performance analysis of large array of imaging atmospheric Cherenkov telescopes*

Zhipeng 张志鹏 Zhang, Ruizhi Yang, Shoushan Zhang, Zhen Xie et autres

Abstract The large array of imaging atmospheric Cherenkov telescopes (LACT) is a planned array of 32 Cherenkov telescopes, each featuring 6-m diameter mirrors, to be constructed at the LHAASO site. This study focused on optimizing the array layout and analyzing the performance …

cn (code pays fourni par la source)

Layout optimization and Performance of Large Array of imaging atmospheric Cherenkov Telescope (LACT)

Zhipeng Zhang, Ruizhi Yang, Shoushan Zhang, Zhen Xie et autres

Large Array of imaging atmospheric Cherenkov Telescope (LACT) is an array of 32 Cherenkov telescopes with 6-meter diameter mirrors to be constructed at the LHAASO site. In this work, we present a study on the layout optimization and performance analysis of LACT. …

Stochastic Wave Dark Matter with Fermi-LAT γ-Ray Pulsar Timing Array

Hoang Nhan Luu, Tao Liu, Jing Ren, Tom Broadhurst et autres

Abstract Pulsar timing arrays (PTAs) can detect disturbances in the fabric of spacetime on a galactic scale by monitoring the arrival time of pulses from millisecond pulsars (MSPs). Recent advancements have enabled the use of γ -ray radiation emitted by MSPs, in …

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Limits on the primordial black holes dark matter with future MeV detectors

Zhen Xie, Bing Liu, Jiahao Liu, Yi-Fu Cai et autres

Primordial black holes (PBHs) are a compelling candidate for dark matter (DM). There remain significant parameter spaces to be explored despite current astrophysical observations setting strong limits. Utilizing advanced MeV observation instruments, we have statistically established the upper limit of Hawking radiation …

cn (code pays fourni par la source)

Limits on the Primordial Black Holes Dark Matter with future MeV detectors

Zhen Xie, Bing Liu, Jiahao Liu, Yi-Fu Cai et autres

Primordial black holes (PBHs) are a compelling candidate for Dark Matter (DM). There remain significant parameter spaces to be explored despite current astrophysical observations have set strong limits. Utilizing advanced MeV observation instruments, we have statistically established the upper limit of Hawking …

Analysis of the gravitational wave background using gamma-ray pulsar timing arrays with next-generation detectors

Zhen Xie, Zhipeng Zhang, J. S. Wang, Ruizhi Yang

In this work, we investigate the potential of gamma-ray pulsar time array (PTA) on gravitational wave background (GWB) using future gamma-ray detectors with larger effective areas. We consider both spaceborne detectors and ground-based imaging air Cherenkov telescope arrays (IACTs). We simulated the …

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