Dark Matter Annual Modulation Analysis with Combined Nuclear and Electron Recoil Channels
| Autor: | TEXONO Collaboration, Li, H. B., Pandey, M. K., Leung, C. H., Singh, L., Wong, H. T., Chi, H. -C., Deniz, M., C., Greeshma, Chen, J. -W., Hsu, H. C., Karadag, S., Karmakar, S., Kumar, V., Li, J., Lin, F. K., Lin, S. T., Liu, C. -P., Liu, S. K., Ma, H., Mishra, D. K., Saraswat, K., Sharma, V., Singh, M. K., Singh, V., Tanabe, D., Wang, J. S., Wu, C. -P., Yang, L. T., Yeh, C. H., Yue, Q. |
|---|---|
| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | After decades of experimental efforts, the DAMA/LIBRA(DL) annual modulation (AM) analysis on the ${\chi}$N (WIMP Dark Matter interactions on nucleus) channel remains the only one which can be interpreted as positive signatures. This has been refuted by numerous time-integrated (TI) and AM analysis. It has been shown that ${\chi}$e (WIMP interactions with electrons) alone is not compatible with the DL AM data. We expand the investigations by performing an AM analysis with the addition of ${\chi}$e long-range and short-range interactions to ${\chi}$N, derived using the frozen-core approximation method. Two scenarios are considered, where the ${\chi}$N and ${\chi}$e processes are due to a single ${\chi}$ (${\Gamma}^{1\chi}_{tot}$) or two different ${\chi}$s (${\Gamma}^{2\chi}_{tot}$). The combined fits with ${\chi}$N and ${\chi}$e provide stronger significance to the DL AM data which are compatible with the presence of additional physical effects beyond \c{hi}N alone. This is the first analysis which explores how ${\chi}$e AM can play a role in DL AM. The revised allowed regions as well as the exclusion contours from the other null AM experiments are presented. All DL AM allowed parameter spaces in ${\chi}$N and ${\chi}$e channels under both ${\Gamma}^{1\chi}_{tot}$ and ${\Gamma}^{2\chi}_{tot}$ are excluded at the 90\% confidence level by the combined null AM results. It can be projected that DL-allowed parameter spaces from generic models with interactions induced by two-WIMPs are ruled out. Comment: 6 pages, 5 figures |
| Databáze: | arXiv |
| Externí odkaz: |
|