Observation of Transverse Λ/Λ[over ¯] Hyperon Polarization in e^{+}e^{-} Annihilation at Belle.

Published

Journal Article

We report the first observation of the spontaneous polarization of Λ and Λ[over ¯] hyperons transverse to the production plane in e^{+}e^{-} annihilation, which is attributed to the effect arising from a polarizing fragmentation function. For inclusive Λ/Λ[over ¯] production, we also report results with subtracted feed-down contributions from Σ^{0} and charm. This measurement uses a dataset of 800.4  fb^{-1} collected by the Belle experiment at or near a center-of-mass energy of 10.58 GeV. We observe a significant polarization that rises with the fractional energy carried by the Λ/Λ[over ¯] hyperon.

Full Text

Duke Authors

Cited Authors

  • Guan, Y; Vossen, A; Adachi, I; Adamczyk, K; Ahn, JK; Aihara, H; Al Said, S; Asner, DM; Atmacan, H; Aulchenko, V; Aushev, T; Ayad, R; Babu, V; Badhrees, I; Bakich, AM; Bansal, V; Behera, P; Beleño, C; Berger, M; Bhardwaj, V; Bhuyan, B; Bilka, T; Biswal, J; Bobrov, A; Bonvicini, G; Bozek, A; Bračko, M; Browder, TE; Cao, L; Červenkov, D; Chang, P; Chekelian, V; Chen, A; Cheon, BG; Chilikin, K; Cho, K; Choi, S-K; Choi, Y; Cinabro, D; Cunliffe, S; Dash, N; Di Carlo, S; Dingfelder, J; Doležal, Z; Dong, TV; Drásal, Z; Eidelman, S; Epifanov, D; Fast, JE; Ferber, T; Fulsom, BG; Garg, R; Gaur, V; Gabyshev, N; Garmash, A; Gelb, M; Giri, A; Goldenzweig, P; Golob, B; Guido, E; Haba, J; Hayasaka, K; Hayashii, H; Hirose, S; Hou, W-S; Iijima, T; Inami, K; Inguglia, G; Ishikawa, A; Itoh, R; Iwasaki, M; Iwasaki, Y; Jacobs, WW; Jaegle, I; Jeon, HB; Jia, S; Jin, Y; Joffe, D; Joo, KK; Julius, T; Kang, KH; Kawasaki, T; Kiesling, C; Kim, DY; Kim, HJ; Kim, JB; Kim, KT; Kim, SH; Kinoshita, K; Kodyš, P; Korpar, S; Kotchetkov, D; Križan, P; Kroeger, R; Krokovny, P; Kuhr, T; Kulasiri, R; Kuzmin, A; Kwon, Y-J; Lange, JS; Lee, IS; Lee, SC; Li, LK; Li, YB; Li Gioi, L; Libby, J; Liventsev, D; Lubej, M; Luo, T; Masuda, M; Matsuda, T; Matvienko, D; Merola, M; Miyata, H; Mizuk, R; Mohanty, GB; Moon, HK; Mori, T; Mussa, R; Nakao, M; Nanut, T; Nath, KJ; Natkaniec, Z; Nayak, M; Niiyama, M; Nisar, NK; Nishida, S; Ogawa, S; Okuno, S; Ono, H; Pakhlov, P; Pakhlova, G; Pal, B; Pardi, S; Park, H; Paul, S; Pedlar, TK; Pestotnik, R; Piilonen, LE; Popov, V; Prencipe, E; Rabusov, A; Rostomyan, A; Russo, G; Sahoo, D; Sakai, Y; Salehi, M; Sandilya, S; Santelj, L; Sanuki, T; Savinov, V; Schneider, O; Schnell, G; Schwanda, C; Seidl, R; Seino, Y; Senyo, K; Seon, O; Sevior, ME; Shebalin, V; Shen, CP; Shibata, T-A; Shiu, J-G; Simon, F; Sokolov, A; Solovieva, E; Starič, M; Strube, JF; Sumihama, M; Sumiyoshi, T; Sutcliffe, W; Suzuki, K; Takizawa, M; Tamponi, U; Tanida, K; Tenchini, F; Uchida, M; Uglov, T; Unno, Y; Uno, S; Urquijo, P; Usov, Y; Vahsen, SE; Van Hulse, C; Van Tonder, R; Varner, G; Vinokurova, A; Vorobyev, V; Waheed, E; Wang, B; Wang, CH; Wang, M-Z; Wang, P; Wang, XL; Watanuki, S; Widmann, E; Won, E; Ye, H; Yelton, J; Yin, JH; Yuan, CZ; Yusa, Y; Zhang, ZP; Zhilich, V; Zhukova, V; Zhulanov, V; Zupanc, A; Belle Collaboration,

Published Date

  • February 2019

Published In

Volume / Issue

  • 122 / 4

Start / End Page

  • 042001 -

PubMed ID

  • 30768311

Pubmed Central ID

  • 30768311

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.122.042001

Language

  • eng