D. Y. Chen

Purple Mountain Observatory

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Dimitrios Kyratzis

Gran Sasso Science Institute

X. Q. Li

Henan University Huaihe Hospital and Huaihe Clinical Institute

A. Tykhonov

University of Geneva

M. N. Mazziotta

Istituto Nazionale di Fisica Nucleare, Sezione di Bari

Y. F. Wang

University of Science and Technology of China

Giacinto Donvito

University of Science and Technology of China

P. Fusco

Istituto Nazionale di Fisica Nucleare, Sezione di Bari

G. Marsella

University of Palermo

F. Fang

Institute of Modern Physics

Margherita Di Santo

Gran Sasso Science Institute

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Chinese Academy of Sciences

153

University of Science and Technology of China

103

Purple Mountain Observatory

Campbell Collaboration

University of Chinese Academy of Sciences

Institute of High Energy Physics

Istituto Nazionale di Fisica Nucleare

Institute of Modern Physics

University of Geneva

Gran Sasso Science Institute

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Search for relativistic fractionally charged particles in space

arXiv (Cornell University) (2022)

DAMPE Collaboration F. Alemanno C. Altomare Q. An P. Azzarello

More than a century after the performance of the oil drop experiment, the possible existence of fractionally charged particles FCP still remains unsettled. The search for FCPs is crucial for some extensions of the Standard Model in particle physics. Most of the previously conducted searches for FCPs in cosmic rays were based on experiments underground or at high altitudes. However, there have been few searches for FCPs in cosmic rays carried out in orbit other than AMS-01 flown by a space shuttle and BESS by a balloon at the top of the atmosphere. In this study, we conduct an FCP search in space based on on-orbit data obtained using the DArk Matter Particle Explorer (DAMPE) satellite over a period of five years. Unlike underground experiments, which require an FCP energy of the order of hundreds of GeV, our FCP search starts at only a few GeV. An upper limit of $6.2\times 10^{-10}~~\mathrm{cm^{-2}sr^{-1} s^{-1}}$ is obtained for the flux. Our results demonstrate that DAMPE exhibits higher sensitivity than experiments of similar types by three orders of magnitude that more stringently restricts the conditions for the existence of FCP in primary cosmic rays.

Orbit (dynamics)

Particle (ecology)

10.48550/arxiv.2209.04260

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An Overview of Research on Digital Replication Technology Implementation

Bo Wu Wangbei Xu D. Y. Chen Xingrui Huang Zeyu Li

Digital Twin is a technology that uses digital modeling to reflect physical entity changes based on physical and data driving, connect real space with virtual models, and simulate real models in virtual space [1]. This article summarizes the step-by-step implementation process and discusses physical

Replication

Virtual space

Physical space

space technology

10.4108/eai.2-6-2023.2334613

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Measurement of the Cosmic Ray Helium Energy Spectrum from 70 GeV to 80 TeV with the DAMPE Space Mission

Physical Review Letters (2021)

Francesco Alemanno Q. An P. Azzarello Felicia Barbato P. Bernardini

The measurement of the energy spectrum of cosmic ray helium nuclei from 70 GeV to 80 TeV using 4.5 years of data recorded by the Dark Matter Particle Explorer (DAMPE) is reported in this work. A hardening of the spectrum is observed at an energy of about 1.3 TeV, similar to previous observations. In addition, a spectral softening at about 34 TeV is revealed for the first time with large statistics and well controlled systematic uncertainties, with an overall significance of 4.3σ. The DAMPE spectral measurements of both cosmic protons and helium nuclei suggest a particle charge dependent softening energy, although with current uncertainties a dependence on the number of nucleons cannot be ruled out.Received 5 January 2021Revised 25 March 2021Accepted 6 April 2021DOI:https://doi.org/10.1103/PhysRevLett.126.201102© 2021 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasCosmic ray & astroparticle detectorsCosmic ray composition & spectraParticle astrophysicsGravitation, Cosmology & Astrophysics

Energy spectrum

10.1103/physrevlett.126.201102

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Citations (123)

Search for relativistic fractionally charged particles in space

Physical review. D/Physical review. D. (2022)

Francesco Alemanno Corrado Altomare Q. An P. Azzarello Felicia Barbato

Orbit (dynamics)

Particle (ecology)

10.1103/physrevd.106.063026

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Citations (6)