论文标题

在$μ^+μ^ - $中搜索深色光子和一个无形的深色希格斯玻色子,并使用Belle II实验丢失了能量最终状态

Search for a dark photon and an invisible dark Higgs boson in $μ^+μ^-$ and missing energy final states with the Belle II experiment

论文作者

Belle II Collaboration, Abudinén, F., Adachi, I., Aggarwal, L., Aihara, H., Akopov, N., Aloisio, A., Ky, N. Anh, Asner, D. M., Atmacan, H., Aushev, T., Aushev, V., Babu, V., Bahinipati, S., Bambade, P., Banerjee, Sw., Bansal, S., Baudot, J., Baur, A., Beaubien, A., Becker, J., Behera, P. K., Bennett, J. V., Bernieri, E., Bernlochner, F. U., Bertemes, M., Bertholet, E., Bessner, M., Bhuyan, B., Bianchi, F., Bilka, T., Biswas, D., Bobrov, A., Bodrov, D., Bolz, A., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Bussino, S., Campajola, M., Casarosa, G., Cecchi, C., Chekelian, V., Chen, C., Chen, Y. Q., Cheon, B. G., Chilikin, K., Chirapatpimol, K., Cho, H. -E., Cho, K., Cho, S. -J., Choi, S. -K., Choudhury, S., Cinabro, D., Corona, L., Cunliffe, S., Dattola, F., de Marino, G., De Nardo, G., De Nuccio, M., De Pietro, G., de Sangro, R., Destefanis, M., Dey, S., De Yta-Hernandez, A., Dhamija, R., Di Canto, A., Di Capua, F., Dingfelder, J., Doležal, Z., Jiménez, I. Domínguez, Dong, T. V., Dorigo, M., Dort, K., Dossett, D., Dreyer, S., Dubey, S., Dujany, G., Ecker, P., Eliachevitch, M., Epifanov, D., Feichtinger, P., Ferber, T., Ferlewicz, D., Fillinger, T., Finck, C., Finocchiaro, G., Flood, K., Fodor, A., Forti, F., Frey, A., Fulsom, B. G., Ganiev, E., Garcia-Hernandez, M., Gaur, V., Gaz, A., Gellrich, A., Giordano, R., Giri, A., Gobbo, B., Godang, R., Goldenzweig, P., Gradl, W., Granderath, S., Graziani, E., Greenwald, D., Gu, T., Gudkova, K., Guilliams, J., Hadjivasiliou, C., Hara, K., Hara, T., Hayasaka, K., Hayashii, H., Hazra, S., Hearty, C., Hedges, M. T., de la Cruz, I. Heredia, Villanueva, M. Hernández, Hershenhorn, A., Higuchi, T., Hill, E. C., Hoek, M., Hohmann, M., Hsu, C. -L., Iijima, T., Inami, K., Inguglia, G., Ipsita, N., Ishikawa, A., Ito, S., Itoh, R., Iwasaki, M., Jackson, P., Jacobs, W. W., Jaffe, D. E., Jang, E. -J., Ji, Q. P., Jia, S., Jin, Y., Junkerkalefeld, H., Kakuno, H., Kaliyar, A. B., Kandra, J., Kang, K. H., Karl, R., Karyan, G., Kawasaki, T., Ketter, C., Kichimi, H., Kiesling, C., Kim, C. -H., Kim, D. Y., Kim, K. -H., Kim, Y. -K., Kinoshita, K., Kodyš, P., Koga, T., Kohani, S., Kojima, K., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Kowalewski, R., Kraetzschmar, T. M. G., Križan, P., Krokovny, P., Kuhr, T., Kumar, R., Kumara, K., Kunigo, T., Kwon, Y. -J., Lacaprara, S., Lai, Y. -T., Lam, T., Lange, J. S., Laurenza, M., Leboucher, R., Lee, S. C., Li, L. K., Li, Y. B., Libby, J., Lieret, K., Liu, Q. Y., Liventsev, D., Longo, S., Lozar, A., Lueck, T., Lyu, C., Maggiora, M., Maiti, R., Maity, S., Manfredi, R., Manoni, E., Marcello, S., Marinas, C., Martel, L., Martini, A., Massaccesi, L., Masuda, M., Matsuoka, K., McKenna, J. A., Meier, F., Merola, M., Metzner, F., Milesi, M., Miller, C., Miyabayashi, K., Mohanty, G. B., Molina-Gonzalez, N., Moneta, S., Moon, H., Mrvar, M., Nakamura, I., Nakamura, K. R., Nakao, M., Nakayama, H., Charan, A. Narimani, Naruki, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nisar, N. K., Nishida, S., Nishimura, K., Ogawa, S., Ono, H., Oskin, P., Pakhlova, G., Paladino, A., Panta, A., Pardi, S., Parham, K., Park, H., Park, S. -H., Passeri, A., Patra, S., Paul, S., Pedlar, T. K., Piccolo, M., Piilonen, L. E., Angioni, G. Pinna, Podesta-Lerma, P. L. M., Podobnik, T., Pokharel, S., Polat, L., Praz, C., Prell, S., Prencipe, E., Prim, M. T., Purwar, H., Rad, N., Rados, P., Raiz, S., Morales, A. Ramirez, Reif, M., Reiter, S., Remnev, M., Ripp-Baudot, I., Rizzo, G., Robertson, S. H., Pérez, D. Rodríguez, Roney, J. M., Rostomyan, A., Rout, N., Sahoo, D., Sanders, D. A., Sandilya, S., Santelj, L., Sato, Y., Scavino, B., Schueler, J., Schwanda, C., Seino, Y., Selce, A., Senyo, K., Serrano, J., Sevior, M. E., Sfienti, C., Shillington, T., Shiu, J. -G., Sibidanov, A., Simon, F., Singh, J. B., Skorupa, J., Soffer, A., Sokolov, A., Solovieva, E., Spataro, S., Spruck, B., Starič, M., Stefkova, S., Stottler, Z. S., Stroili, R., Sumihama, M., Sumisawa, K., Sutcliffe, W., Suzuki, S. Y., Svidras, H., Tabata, M., Takizawa, M., Tamponi, U., Tanaka, S., Tanida, K., Tanigawa, H., Tenchini, F., Tiwary, R., Tonelli, D., Torassa, E., Toutounji, N., Trabelsi, K., Uchida, M., Ueda, I., Uematsu, Y., Uglov, T., Unger, K., Unno, Y., Uno, K., Uno, S., Urquijo, P., Ushiroda, Y., Vahsen, S. E., van Tonder, R., Varner, G. S., Varvell, K. E., Vinokurova, A., Vitale, L., Vobbilisetti, V., Waheed, E., Wakeling, H. M., Wang, E., Wang, M. -Z., Warburton, A., Watanabe, M., Watanuki, S., Welsch, M., Wessel, C., Windel, H., Won, E., Xu, X. P., Yabsley, B. D., Yamada, S., Yan, W., Yang, S. B., Ye, H., Yin, J. H., Yoshihara, K., Yuan, C. Z., Yusa, Y., Zani, L., Zhang, Y., Zhilich, V., Zhou, Q. D., Zhou, X. Y., Zhukova, V. I., Žlebčík, R.

论文摘要

深色光子$ a^\ prime $和深色希格斯玻色子$ h^\ prime $是许多黑暗扇区模型中预测的假设粒子。我们在黑暗的higgsstrahung过程中搜索$ a^\ prime $和$ h^\ prime $ $ e^{+e^{+} Belle II实验在2019年收集的10.58 GEV的能量。综合发光度为8.34 fb $^{ - 1} $,我们没有观察到信号的证据。我们在横截面的1.7--5.0 fb范围内获得90%的贝叶斯可信度的排除限制,范围为$ 1.7 \ times10^{ - 8} $ - $ 200 \ $ 200 \ times10^{ - 8} $在有效耦合$ \ varepsilon^2 \ varepsilon^$ a^$ a^$ a^$ a^$ a^$ c $ c $ c的$ c $ c $ c的$ 4. M_{A^\prime}< 9.7$ GeV/$c^2$ and for the $h^\prime$ mass $M_{h^\prime} < M_{A^\prime}$, where $\varepsilon$ is the mixing strength between the standard model and the dark photon and $α_D$ is the coupling of the dark photon to the dark Higgs boson.我们的限制是该质量范围内的第一个。

The dark photon $A^\prime$ and the dark Higgs boson $h^\prime$ are hypothetical particles predicted in many dark sector models. We search for the simultaneous production of $A^\prime$ and $h^\prime$ in the dark Higgsstrahlung process $e^{+}e^{-}\rightarrow A^\prime \, h^\prime$ with $A^\prime \rightarrow μ^+μ^-$ and $ h^\prime$ invisible in electron-positron collisions at a center-of-mass energy of 10.58 GeV collected by the Belle II experiment in 2019. With an integrated luminosity of 8.34 fb$^{-1}$, we observe no evidence for signal. We obtain exclusion limits at 90% Bayesian credibility in the range of 1.7--5.0 fb on the cross section and in the range of $1.7 \times10^{-8}$--$200 \times10^{-8}$ on the effective coupling $\varepsilon^2 \times α_D$ for the $A^\prime$ mass in the range of 4.0 GeV/$c^2$ $< M_{A^\prime}< 9.7$ GeV/$c^2$ and for the $h^\prime$ mass $M_{h^\prime} < M_{A^\prime}$, where $\varepsilon$ is the mixing strength between the standard model and the dark photon and $α_D$ is the coupling of the dark photon to the dark Higgs boson. Our limits are the first in this mass range.

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