Search for solar Kaluza–Klein axions by annual modulation with the XMASS-I detector
Search for solar Kaluza–Klein axions by annual modulation with the XMASS-I detector
复制标题
使用 XMASS-I 探测器通过年调制搜索太阳卡鲁扎-克莱因轴子
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
S. Nakamura
中科院分区：
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作者：
X. C. N. Oka;K. Abe;K. Hiraide;K. Ichimura;Y. Kishimoto;K. Kobayashi;M. Kobayashi;S. Moriyama;M. Nakahata;T. Norita;H. Ogawa;K. Sato;H. Sekiya;O. Takachio;A. Takeda;S. Tasaka;M. Yamashita;B. Yang;N. Y. Kim;Y. Kim;Y. Itow;K. Kanzawa;R. Kegasa;K. Masuda;H. Takiya;K. Fushimi;G. Kanzaki;K. Martens;Y. Suzuki;B. D. Xu;R. Fujita;K. Hosokawa;K. Miuchi;Y. Takeuchi;Y. H. Kim;K. Lee;M. K. Lee;Y. Fukuda;M. Miyasaka;K. Nishijima;S. Nakamura
在标准四维时空之外的大额外维度理论中，轴子可以在这样的额外维度中传播，并获得卡鲁扎-克莱因（KK）激发。这些KK轴子是在太阳中产生的，可以解决太阳日冕无法解释的加热问题。虽然大多数的KK轴子逃离了太阳系，但一小部分被引力困在围绕太阳的轨道上。它们会在地面探测器中衰变成两个光子。事件发生率预计每年根据与太阳的距离进行调整。我们已经使用832美元搜索了年调制特征 乘以359$ kg$cdot$天的XMASS-I数据。没有发现明显的事件率调制，因此我们将第一个实验约束设置为4.8美元的KK轴子-光子耦合 在90%置信水平下，KK轴子数密度为$时，x = 10^{-12}，mathrm{GeV}^{-1}$ar{n}_mathrm{a} = 4.07 imes 10^{13}，mathrm{m}^{-3}$，额外维度的总数n = 2$，以及轴子可以传播的额外维度的数量delta = 2$。
In theories with the large extra dimensions beyond the standard 4-dimensional spacetime, axions could propagate in such extra dimensions, and acquire Kaluza-Klein (KK) excitations. These KK axions are produced in the Sun and could solve unexplained heating of the solar corona. While most of the solar KK axions escape from the solar system, a small fraction is gravitationally trapped in orbits around the Sun. They would decay into two photons inside a terrestrial detector. The event rate is expected to modulate annually depending on the distance from the Sun. We have searched for the annual modulation signature using $832 imes 359$ kg$cdot$days of XMASS-I data. No significant event rate modulation is found, and hence we set the first experimental constraint on the KK axion-photon coupling of $4.8 imes 10^{-12}, mathrm{GeV}^{-1}$ at 90% confidence level for a KK axion number density of $ar{n}_mathrm{a} = 4.07 imes 10^{13}, mathrm{m}^{-3}$, the total number of extra dimensions $n = 2$, and the number of extra dimensions $delta = 2$ that axions can propagate in.