Neutron-induced nuclear recoil background is critical to dark matter searches in the PandaX-4T liquid xenon experiment. In this study, we investigate the features of neutron background in liquid xenon and evaluate its contribution in single scattering nuclear recoil events using three methods. The first method is fully based on Monte Carlo simulations. The last two are data-driven methods that also use multiple scattering signals and high energy signals in the data. In the PandaX-4T commissioning data with an exposure of 0.63 tonne-year, all these methods give a consistent result, i.e., there are $ 1.15\pm0.57 $ neutron-induced backgrounds in the dark matter signal region within an approximated nuclear recoil energy window between 5 and 100 keV.
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"value": "School of Physics and Astronomy, Shanghai Jiao Tong University, Key Laboratory for Particle Astrophysics and Cosmology (MoE), Shanghai Key Laboratory for Particle Physics and Cosmology, China"
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],
"surname": "Zhang",
"given_names": "Tao",
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{
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"country": "China",
"value": "School of Physics and Astronomy, Shanghai Jiao Tong University, Key Laboratory for Particle Astrophysics and Cosmology (MoE), Shanghai Key Laboratory for Particle Physics and Cosmology, China"
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"surname": "Zhao",
"given_names": "Li",
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{
"affiliations": [
{
"country": "China",
"value": "School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, China"
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"value": "Yalong River Hydropower Development Company, Ltd., 288 Shuanglin Road, China"
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"country": "China",
"value": "School of Physics and Astronomy, Shanghai Jiao Tong University, Key Laboratory for Particle Astrophysics and Cosmology (MoE), Shanghai Key Laboratory for Particle Physics and Cosmology, China"
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],
"surname": "Zhou",
"email": "nzhou@sjtu.edu.cn, Corresponding author",
"full_name": "Zhou,Ning",
"given_names": "Ning"
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{
"affiliations": [
{
"country": "China",
"value": "School of Physics, Beihang University, China"
}
],
"surname": "Zhou",
"given_names": "Xiaopeng",
"full_name": "Zhou,Xiaopeng"
},
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"affiliations": [
{
"country": "China",
"value": "Yalong River Hydropower Development Company, Ltd., 288 Shuanglin Road, China"
}
],
"surname": "Zhou",
"given_names": "Yong",
"full_name": "Zhou,Yong"
}
],
"titles": [
{
"source": "IOP",
"title": "Neutron-induced nuclear recoil background in the PandaX-4T experiment "
}
],
"dois": [
{
"value": "10.1088/1674-1137/ac8539"
}
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"publication_info": [
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"journal_title": "Chinese Physics C",
"material": "article",
"journal_volume": "46",
"artid": "115001",
"year": 2022,
"journal_issue": "11"
}
],
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"submission_number": "6ab8f560041a11ee8e62c23b20d38f61"
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"page_nr": [
13
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{
"url": "http://creativecommons.org/licenses/by/3.0/",
"license": "CC-BY-3.0"
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],
"copyright": [
{
"statement": "\u00a9 2022 Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd",
"year": "2022"
}
],
"control_number": "73643",
"record_creation_date": "2022-11-02T03:30:30.037795",
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"arxiv_eprints": [
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"categories": [
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"abstracts": [
{
"source": "IOP",
"value": "Neutron-induced nuclear recoil background is critical to dark matter searches in the PandaX-4T liquid xenon experiment. In this study, we investigate the features of neutron background in liquid xenon and evaluate its contribution in single scattering nuclear recoil events using three methods. The first method is fully based on Monte Carlo simulations. The last two are data-driven methods that also use multiple scattering signals and high energy signals in the data. In the PandaX-4T commissioning data with an exposure of 0.63 tonne-year, all these methods give a consistent result, i.e., there are $ 1.15\\pm0.57 $ neutron-induced backgrounds in the dark matter signal region within an approximated nuclear recoil energy window between 5 and 100 keV."
}
],
"imprints": [
{
"date": "2022-11-01",
"publisher": "IOP"
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]
}