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Neutron radius determination of 133Cs and its impact on the interpretation of CEvNS-CsI measurement

Fuente: arXiv

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Auteurs principaux:	Huang, Y., Xia, S. Y., Li, Y. F., Tu, X. L., Zhang, J. T., Shao, C. J., Yue, K., Ma, P., Niu, Y. F., Li, Z. P., Kuang, Y., Liu, X. Q., Han, J. F., Egelhof, P., Litvinov, Yu. A., Wang, M., Zhang, Y. H., Zhou, X. H., Sun, Z. Y.
Format:	Preprint
Publié:	2024
Sujets:	Nuclear Experiment Nuclear Theory
Accès en ligne:	Acceder al recurso
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_version_	1866910401341423616
author	Huang, Y. Xia, S. Y. Li, Y. F. Tu, X. L. Zhang, J. T. Shao, C. J. Yue, K. Ma, P. Niu, Y. F. Li, Z. P. Kuang, Y. Liu, X. Q. Han, J. F. Egelhof, P. Litvinov, Yu. A. Wang, M. Zhang, Y. H. Zhou, X. H. Sun, Z. Y.
author_facet	Huang, Y. Xia, S. Y. Li, Y. F. Tu, X. L. Zhang, J. T. Shao, C. J. Yue, K. Ma, P. Niu, Y. F. Li, Z. P. Kuang, Y. Liu, X. Q. Han, J. F. Egelhof, P. Litvinov, Yu. A. Wang, M. Zhang, Y. H. Zhou, X. H. Sun, Z. Y.
contents	Proton-$^{133}$Cs elastic scattering at low momentum transfer is performed using an in-ring reaction technique at the Cooler Storage Ring at the Heavy Ion Research Facility in Lanzhou. Recoil protons from the elastic collisions between the internal H$_2$-gas target and the circulating $^{133}$Cs ions at 199.4 MeV/u are detected by a silicon-strip detector. The matter radius of $^{133}$Cs is deduced by describing the measured differential cross sections using the Glauber model. Employing the adopted proton distribution radius, a point-neutron radius of 4.86(21) fm for $^{133}$Cs is obtained. With the newly determined neutron radius, the weak mixing angle sin$^2 θ_W$ is independently extracted to be 0.227(28) by fitting the coherent elastic neutrino-nucleus scattering data. Our work limits the sin$^2 θ_W$ value in a range smaller than the ones proposed by the previous independent approaches, and would play an important role in searching new physics via the high precision CE$ν$NS-CsI cross section data in the near future.
format	Preprint
id	arxiv_https___arxiv_org_abs_2403_03566
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	Neutron radius determination of 133Cs and its impact on the interpretation of CEvNS-CsI measurement Huang, Y. Xia, S. Y. Li, Y. F. Tu, X. L. Zhang, J. T. Shao, C. J. Yue, K. Ma, P. Niu, Y. F. Li, Z. P. Kuang, Y. Liu, X. Q. Han, J. F. Egelhof, P. Litvinov, Yu. A. Wang, M. Zhang, Y. H. Zhou, X. H. Sun, Z. Y. Nuclear Experiment Nuclear Theory Proton-$^{133}$Cs elastic scattering at low momentum transfer is performed using an in-ring reaction technique at the Cooler Storage Ring at the Heavy Ion Research Facility in Lanzhou. Recoil protons from the elastic collisions between the internal H$_2$-gas target and the circulating $^{133}$Cs ions at 199.4 MeV/u are detected by a silicon-strip detector. The matter radius of $^{133}$Cs is deduced by describing the measured differential cross sections using the Glauber model. Employing the adopted proton distribution radius, a point-neutron radius of 4.86(21) fm for $^{133}$Cs is obtained. With the newly determined neutron radius, the weak mixing angle sin$^2 θ_W$ is independently extracted to be 0.227(28) by fitting the coherent elastic neutrino-nucleus scattering data. Our work limits the sin$^2 θ_W$ value in a range smaller than the ones proposed by the previous independent approaches, and would play an important role in searching new physics via the high precision CE$ν$NS-CsI cross section data in the near future.
title	Neutron radius determination of 133Cs and its impact on the interpretation of CEvNS-CsI measurement
topic	Nuclear Experiment Nuclear Theory
url	https://arxiv.org/abs/2403.03566