Observation of Transverse $\Lambda/\bar{\Lambda}$ Hyperon Polarization in $e^+e^-$ Annihilation at Belle
High Energy Physics - Experiment
2019-02-06 v2
Abstract
We report the first observation of the spontaneous polarization of and hyperons transverse to the production plane in annihilation, which is attributed to the effect arising from a polarizing fragmentation function. For inclusive production, we also report results with subtracted feed-down contributions from and charm. This measurement uses a dataset of 800.4 fb 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 hyperon.
Cite
@article{arxiv.1808.05000,
title = {Observation of Transverse $\Lambda/\bar{\Lambda}$ Hyperon Polarization in $e^+e^-$ Annihilation at Belle},
author = {Belle Collaboration and Y. Guan and A. Vossen and I. Adachi and K. Adamczyk and J. K. Ahn and H. Aihara and S. Al Said and D. M. Asner and H. Atmacan and V. Aulchenko and T. Aushev and R. Ayad and V. Babu and I. Badhrees and A. M. Bakich and V. Bansal and P. Behera and C. Beleño and M. Berger and V. Bhardwaj and B. Bhuyan and T. Bilka and J. Biswal and A. Bobrov and G. Bonvicini and A. Bozek and M. Bračko and T. E. Browder and L. Cao and D. Červenkov and P. Chang and V. Chekelian and A. Chen and B. G. Cheon and K. Chilikin and K. Cho and S. -K. Choi and Y. Choi and D. Cinabro and S. Cunliffe and N. Dash and S. Di Carlo and J. Dingfelder and Z. Doležal and T. V. Dong and Z. Drásal and S. Eidelman and D. Epifanov and J. E. Fast and T. Ferber and B. G. Fulsom and R. Garg and V. Gaur and N. Gabyshev and A. Garmash and M. Gelb and A. Giri and P. Goldenzweig and B. Golob and E. Guido and J. Haba and K. Hayasaka and H. Hayashii and S. Hirose and W. -S. Hou and T. Iijima and K. Inami and G. Inguglia and A. Ishikawa and R. Itoh and M. Iwasaki and Y. Iwasaki and W. W. Jacobs and I. Jaegle and H. B. Jeon and S. Jia and Y. Jin and D. Joffe and K. K. Joo and T. Julius and K. H. Kang and T. Kawasaki and C. Kiesling and D. Y. Kim and H. J. Kim and J. B. Kim and K. T. Kim and S. H. Kim and K. Kinoshita and P. Kodyš and S. Korpar and D. Kotchetkov and P. Križan and R. Kroeger and P. Krokovny and T. Kuhr and R. Kulasiri and A. Kuzmin and Y. -J. Kwon and J. S. Lange and I. S. Lee and S. C. Lee and L. K. Li and Y. B. Li and L. Li Gioi and J. Libby and D. Liventsev and M. Lubej and T. Luo and M. Masuda and T. Matsuda and D. Matvienko and M. Merola and H. Miyata and R. Mizuk and G. B. Mohanty and H. K. Moon and T. Mori and R. Mussa and M. Nakao and T. Nanut and K. J. Nath and Z. Natkaniec and M. Nayak and M. Niiyama and N. K. Nisar and S. Nishida and S. Ogawa and S. Okuno and H. Ono and P. Pakhlov and G. Pakhlova and B. Pal and S. Pardi and H. Park and S. Paul and T. K. Pedlar and R. Pestotnik and L. E. Piilonen and V. Popov and E. Prencipe and A. Rabusov and A. Rostomyan and G. Russo and D. Sahoo and Y. Sakai and M. Salehi and S. Sandilya and L. Santelj and T. Sanuki and V. Savinov and O. Schneider and G. Schnell and C. Schwanda and R. Seidl and Y. Seino and K. Senyo and O. Seon and M. E. Sevior and V. Shebalin and C. P. Shen and T. -A. Shibata and J. -G. Shiu and F. Simon and A. Sokolov and E. Solovieva and M. Starič and J. F. Strube and M. Sumihama and T. Sumiyoshi and W. Sutcliffe and K. Suzuki and M. Takizawa and U. Tamponi and K. Tanida and F. Tenchini and M. Uchida and T. Uglov and Y. Unno and S. Uno and P. Urquijo and Y. Usov and S. E. Vahsen and C. Van Hulse and R. Van Tonder and G. Varner and A. Vinokurova and V. Vorobyev and E. Waheed and B. Wang and C. H. Wang and M. -Z. Wang and P. Wang and X. L. Wang and S. Watanuki and E. Widmann and E. Won and H. Ye and J. Yelton and J. H. Yin and C. Z. Yuan and Y. Yusa and Z. P. Zhang and V. Zhilich and V. Zhukova and V. Zhulanov and A. Zupanc},
journal= {arXiv preprint arXiv:1808.05000},
year = {2019}
}
Comments
7 pages, 3 figures, plus supplemental material. Submitted to Phys. Rev. Lett