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Constraints on inelastic dark matter from the CDEX-1B experiment

Fuente: arXiv

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Autores principales:	Liang, Y. F., Yang, L. T., Yue, Q., Kang, K. J., Li, Y. J., An, H. P., C., Greeshma, Chang, J. P., Chen, H., Chen, Y. H., Cheng, J. P., Cui, J. Y., Dai, W. H., Deng, Z., Dong, Y. X., Fang, C. H., Gong, H., Guo, Q. J., Guo, T., Guo, X. Y., He, L., He, J. R., Huang, H. X., Huang, T. C., Karmakar, S., Lan, Y. S., Li, H. B., Li, H. Y., Li, J. M., Li, J., Li, M. C., Li, Q. Y., Li, R. M. J., Li, X. Q., Li, Y. L., Liao, B., Lin, F. K., Lin, S. T., Liu, J. X., Liu, R. Z., Liu, S. K., Liu, Y. D., Liu, Y., Liu, Y. Y., Ma, H., Mao, Y. C., Mureed, A., Pan, H., Qi, N. C., Ren, J., Ruan, X. C., Shen, M. B., Shi, H. Y., Singh, M. K., Sun, T. X., Sun, W. L., Tang, C. J., Tian, Y., Wan, H. F., Wang, G. F., Wang, J. Z., Wang, L., Wang, Q., Wang, Y. F., Wang, Y. X., Wong, H. T., Wu, Y. C., Xing, H. Y., Xiong, K. Z., Xu, R., Xu, Y., Xue, T., Yan, Y. L., Yi, N., Yu, C. X., Yu, H. J., Yu, X., Zeng, M., Zeng, Z., Zhang, F. S., Zhang, P., Zhang, Z. Y., Zhao, M. G., Zhou, J. F., Zhou, Z. Y., Zhu, J. J.
Formato:	Preprint
Publicado:	2025
Materias:	High Energy Physics - Experiment High Energy Physics - Phenomenology Instrumentation and Detectors
Acceso en línea:	Acceder al recurso
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

_version_	1866908739700785152
author	Liang, Y. F. Yang, L. T. Yue, Q. Kang, K. J. Li, Y. J. An, H. P. C., Greeshma Chang, J. P. Chen, H. Chen, Y. H. Cheng, J. P. Cui, J. Y. Dai, W. H. Deng, Z. Dong, Y. X. Fang, C. H. Gong, H. Guo, Q. J. Guo, T. Guo, X. Y. He, L. He, J. R. Huang, H. X. Huang, T. C. Karmakar, S. Lan, Y. S. Li, H. B. Li, H. Y. Li, J. M. Li, J. Li, M. C. Li, Q. Y. Li, R. M. J. Li, X. Q. Li, Y. L. Liao, B. Lin, F. K. Lin, S. T. Liu, J. X. Liu, R. Z. Liu, S. K. Liu, Y. D. Liu, Y. Liu, Y. Y. Ma, H. Mao, Y. C. Mureed, A. Pan, H. Qi, N. C. Ren, J. Ruan, X. C. Shen, M. B. Shi, H. Y. Singh, M. K. Sun, T. X. Sun, W. L. Tang, C. J. Tian, Y. Wan, H. F. Wang, G. F. Wang, J. Z. Wang, L. Wang, Q. Wang, Q. Wang, Y. F. Wang, Y. X. Wong, H. T. Wu, Y. C. Xing, H. Y. Xiong, K. Z. Xu, R. Xu, Y. Xue, T. Yan, Y. L. Yi, N. Yu, C. X. Yu, H. J. Yu, X. Zeng, M. Zeng, Z. Zhang, F. S. Zhang, P. Zhang, P. Zhang, Z. Y. Zhao, M. G. Zhou, J. F. Zhou, Z. Y. Zhu, J. J.
author_facet	Liang, Y. F. Yang, L. T. Yue, Q. Kang, K. J. Li, Y. J. An, H. P. C., Greeshma Chang, J. P. Chen, H. Chen, Y. H. Cheng, J. P. Cui, J. Y. Dai, W. H. Deng, Z. Dong, Y. X. Fang, C. H. Gong, H. Guo, Q. J. Guo, T. Guo, X. Y. He, L. He, J. R. Huang, H. X. Huang, T. C. Karmakar, S. Lan, Y. S. Li, H. B. Li, H. Y. Li, J. M. Li, J. Li, M. C. Li, Q. Y. Li, R. M. J. Li, X. Q. Li, Y. L. Liao, B. Lin, F. K. Lin, S. T. Liu, J. X. Liu, R. Z. Liu, S. K. Liu, Y. D. Liu, Y. Liu, Y. Y. Ma, H. Mao, Y. C. Mureed, A. Pan, H. Qi, N. C. Ren, J. Ruan, X. C. Shen, M. B. Shi, H. Y. Singh, M. K. Sun, T. X. Sun, W. L. Tang, C. J. Tian, Y. Wan, H. F. Wang, G. F. Wang, J. Z. Wang, L. Wang, Q. Wang, Q. Wang, Y. F. Wang, Y. X. Wong, H. T. Wu, Y. C. Xing, H. Y. Xiong, K. Z. Xu, R. Xu, Y. Xue, T. Yan, Y. L. Yi, N. Yu, C. X. Yu, H. J. Yu, X. Zeng, M. Zeng, Z. Zhang, F. S. Zhang, P. Zhang, P. Zhang, Z. Y. Zhao, M. G. Zhou, J. F. Zhou, Z. Y. Zhu, J. J.
contents	We present limits on spin-independent inelastic weakly interacting massive particles (WIMP)-nucleus scattering using the 737.1 kg$\cdot$day dataset from the CDEX-1B experiment. Expected nuclear recoil spectra for various inelastic WIMP masses $m_χ$ and mass splittings $δ$ are calculated under the standard halo model. An accurate background model of CDEX-1B is constructed by simulating all major background sources. The model parameters are then determined through maximum likelihood estimation and Markov chain Monte Carlo fitting. The resulting 90\% confidence level upper limits on the WIMP-nucleon cross section $σ_{\mathrm{n}}$ exclude certain DAMA/LIBRA allowed regions: the $χ^2 < 4$ regions for $δ< 30$ keV at $m_χ= 250$ GeV and the $χ^2 < 9$ region for $δ< 50$ keV at $m_χ= 500$ GeV. The method is applicable to other inelastic dark matter scenarios, and the upcoming CDEX-50 experiment is expected to improve sensitivity by four orders of magnitude.
format	Preprint
id	arxiv_https___arxiv_org_abs_2510_07800
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Constraints on inelastic dark matter from the CDEX-1B experiment Liang, Y. F. Yang, L. T. Yue, Q. Kang, K. J. Li, Y. J. An, H. P. C., Greeshma Chang, J. P. Chen, H. Chen, Y. H. Cheng, J. P. Cui, J. Y. Dai, W. H. Deng, Z. Dong, Y. X. Fang, C. H. Gong, H. Guo, Q. J. Guo, T. Guo, X. Y. He, L. He, J. R. Huang, H. X. Huang, T. C. Karmakar, S. Lan, Y. S. Li, H. B. Li, H. Y. Li, J. M. Li, J. Li, M. C. Li, Q. Y. Li, R. M. J. Li, X. Q. Li, Y. L. Liao, B. Lin, F. K. Lin, S. T. Liu, J. X. Liu, R. Z. Liu, S. K. Liu, Y. D. Liu, Y. Liu, Y. Y. Ma, H. Mao, Y. C. Mureed, A. Pan, H. Qi, N. C. Ren, J. Ruan, X. C. Shen, M. B. Shi, H. Y. Singh, M. K. Sun, T. X. Sun, W. L. Tang, C. J. Tian, Y. Wan, H. F. Wang, G. F. Wang, J. Z. Wang, L. Wang, Q. Wang, Q. Wang, Y. F. Wang, Y. X. Wong, H. T. Wu, Y. C. Xing, H. Y. Xiong, K. Z. Xu, R. Xu, Y. Xue, T. Yan, Y. L. Yi, N. Yu, C. X. Yu, H. J. Yu, X. Zeng, M. Zeng, Z. Zhang, F. S. Zhang, P. Zhang, P. Zhang, Z. Y. Zhao, M. G. Zhou, J. F. Zhou, Z. Y. Zhu, J. J. High Energy Physics - Experiment High Energy Physics - Phenomenology Instrumentation and Detectors We present limits on spin-independent inelastic weakly interacting massive particles (WIMP)-nucleus scattering using the 737.1 kg$\cdot$day dataset from the CDEX-1B experiment. Expected nuclear recoil spectra for various inelastic WIMP masses $m_χ$ and mass splittings $δ$ are calculated under the standard halo model. An accurate background model of CDEX-1B is constructed by simulating all major background sources. The model parameters are then determined through maximum likelihood estimation and Markov chain Monte Carlo fitting. The resulting 90\% confidence level upper limits on the WIMP-nucleon cross section $σ_{\mathrm{n}}$ exclude certain DAMA/LIBRA allowed regions: the $χ^2 < 4$ regions for $δ< 30$ keV at $m_χ= 250$ GeV and the $χ^2 < 9$ region for $δ< 50$ keV at $m_χ= 500$ GeV. The method is applicable to other inelastic dark matter scenarios, and the upcoming CDEX-50 experiment is expected to improve sensitivity by four orders of magnitude.
title	Constraints on inelastic dark matter from the CDEX-1B experiment
topic	High Energy Physics - Experiment High Energy Physics - Phenomenology Instrumentation and Detectors
url	https://arxiv.org/abs/2510.07800