학술논문

Search for a massive invisible particle $X^0$ in $B^{+}\to e^{+}X^{0}$ and $B^{+}\to \mu^{+}X^{0}$ decays
Document Type
Working Paper
Author
Park, C. -S.Kwon, Y. -J.Adachi, I.Aihara, H.Asner, D. M.Aushev, T.Babu, V.Badhrees, I.Bakich, A. M.Barberio, E.Behera, P.Bhardwaj, V.Biswal, J.Bonvicini, G.Bozek, A.Bračko, M.Browder, T. E.Červenkov, D.Chekelian, V.Chen, A.Cheon, B. G.Chilikin, K.Chistov, R.Cho, K.Chobanova, V.Choi, Y.Cinabro, D.Dalseno, J.Danilov, M.Dash, N.Doležal, Z.Dutta, D.Eidelman, S.Farhat, H.Fast, J. E.Ferber, T.Fulsom, B. G.Gaur, V.Gabyshev, N.Garmash, A.Gillard, R.Goh, Y. M.Goldenzweig, P.Grzymkowska, O.Hara, T.Hayasaka, K.Hayashii, H.Heck, M.Hou, W. -S.Iijima, T.Inami, K.Inguglia, G.Ishikawa, A.Itoh, R.Iwasaki, Y.Jaegle, I.Jeon, H. B.Julius, T.Kang, K. H.Kato, E.Katrenko, P.Kim, D. Y.Kim, J. B.Kim, K. T.Kim, M. J.Kim, S. H.Kinoshita, K.Kodys, P.Korpar, S.Križan, P.Krokovny, P.Kuzmin, A.Lee, I. S.Li, C. H.Li, L.Li, Y.Gioi, L. LiLibby, J.Liventsev, D.Lubej, M.Lukin, P.Masuda, M.Matvienko, D.Miyabayashi, K.Miyata, H.Mizuk, R.Mohanty, G. B.Mohanty, S.Moll, A.Moon, H. K.Mussa, R.Nakano, E.Nakao, M.Nath, K. J.Nayak, M.Negishi, K.Nisar, N. K.Nishida, S.Ogawa, S.Okuno, S.Pakhlov, P.Pakhlova, G.Pal, B.Park, C. W.Park, H.Pedlar, T. K.Petrič, M.Piilonen, L. E.Pulvermacher, C.Purohit, M. V.Rauch, J.Ritter, M.Rostomyan, A.Ryu, S.Sakai, Y.Sandilya, S.Santelj, L.Sanuki, T.Sato, Y.Schlüter, T.Schneider, O.Schnell, G.Schwanda, C.Schwartz, A. J.Seino, Y.Semmler, D.Senyo, K.Seon, O.Sevior, M. E.Shebalin, V.Shen, C. P.Shibata, T. -A.Shiu, J. -G.Shwartz, B.Simon, F.Sokolov, A.Stanič, S.Starič, M.Stypula, J.Sumiyoshi, T.Tamponi, U.Teramoto, Y.Trabelsi, K.Uchida, M.Uglov, T.Unno, Y.Uno, S.Urquijo, P.Usov, Y.Van Hulse, C.Vanhoefer, P.Varner, G.Varvell, K. E.Wagner, M. N.Wang, C. H.Wang, M. -Z.Wang, P.Watanabe, Y.Won, E.Yamaoka, J.Yashchenko, S.Ye, H.Yook, Y.Yusa, Y.Zhang, Z. P.Zhilich, V.Zhulanov, V.Zupanc, A.
Source
Phys. Rev. D 94, 012003 (2016)
Subject
High Energy Physics - Experiment
Language
Abstract
We present a search for a non-Standard-Model invisible particle $X^0$ in the mass range $0.1\textrm{-}1.8 \,{\rm GeV}/{c^2}$ in $B^{+}\to e^{+} X^{0}$ and $B^{+}\to \mu^{+} X^{0}$ decays. The results are obtained from a $711~{\rm fb}^{-1}$ data sample that corresponds to $772 \times 10^{6} B\bar{B}$ pairs, collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB $e^+ e^-$ collider. One $B$ meson is fully reconstructed in a hadronic mode to determine the momentum of the lepton of the signal decay in the rest frame of the recoiling partner $B$ meson. We find no evidence of a signal and set upper limits on the order of $10^{-6}$.
Comment: 8 pages, 4 figures, 3 tables