Observation of Transverse $\Lambda/\bar{\Lambda}$ Hyperon Polarization in $e^+e^-$ Annihilation at Belle
High Energy Physics - Experiment
2016-11-22 v1
Abstract
We report the first observation of the polarization of hyperons transverse to its production plane in annihilation. We observe a significant polarization that rises with the fractional energy carried by the hyperon as well as its transverse momentum. To define the production plane, we use the direction of the hyperon momentum together with either the thrust axis in the event or the momentum vector of a hadron in the opposite hemisphere. Furthermore, we investigate the contributions to the hyperon polarization from the feed-down from and decays. 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.
Cite
@article{arxiv.1611.06648,
title = {Observation of Transverse $\Lambda/\bar{\Lambda}$ Hyperon Polarization in $e^+e^-$ Annihilation at Belle},
author = {The Belle Collaboration and A. Abdesselam and I. Adachi and K. Adamczyk and H. Aihara and S. Al Said and K. Arinstein and Y. Arita and D. M. Asner and T. Aso and H. Atmacan and V. Aulchenko and T. Aushev and R. Ayad and T. Aziz and V. Babu and I. Badhrees and S. Bahinipati and A. M. Bakich and A. Bala and Y. Ban and V. Bansal and E. Barberio and M. Barrett and W. Bartel and A. Bay and P. Behera and M. Belhorn and K. Belous and M. Berger and D. Besson and V. Bhardwaj and B. Bhuyan and J. Biswal and T. Bloomfield and S. Blyth and A. Bobrov and A. Bondar and G. Bonvicini and C. Bookwalter and C. Boulahouache and A. Bozek and M. Bračko and F. Breibeck and J. Brodzicka and T. E. Browder and E. Waheed and D. Červenkov and M. -C. Chang and P. Chang and Y. Chao and V. Chekelian and A. Chen and K. -F. Chen and P. Chen and B. G. Cheon and K. Chilikin and R. Chistov and K. Cho and V. Chobanova and S. -K. Choi and Y. Choi and D. Cinabro and J. Crnkovic and J. Dalseno and M. Danilov and N. Dash and S. Di Carlo and J. Dingfelder and Z. Doležal and D. Dossett and Z. Drásal and A. Drutskoy and S. Dubey and D. Dutta and K. Dutta and S. Eidelman and D. Epifanov and H. Farhat and J. E. Fast and M. Feindt and T. Ferber and A. Frey and O. Frost and B. G. Fulsom and V. Gaur and N. Gabyshev and S. Ganguly and A. Garmash and D. Getzkow and R. Gillard and F. Giordano and R. Glattauer and Y. M. Goh and P. Goldenzweig and B. Golob and D. Greenwald and M. Grosse Perdekamp and J. Grygier and O. Grzymkowska and Y. Guan and H. Guo and J. Haba and P. Hamer and Y. L. Han and K. Hara and T. Hara and Y. Hasegawa and J. Hasenbusch and K. Hayasaka and H. Hayashii and X. H. He and M. Heck and M. T. Hedges and D. Heffernan and M. Heider and A. Heller and T. Higuchi and S. Himori and S. Hirose and T. Horiguchi and Y. Hoshi and K. Hoshina and W. -S. Hou and Y. B. Hsiung and C. -L. Hsu and M. Huschle and H. J. Hyun and Y. Igarashi and T. Iijima and M. Imamura and K. Inami and G. Inguglia and A. Ishikawa and K. Itagaki and R. Itoh and M. Iwabuchi and M. Iwasaki and Y. Iwasaki and S. Iwata and W. W. Jacobs and I. Jaegle and H. B. Jeon and Y. Jin and D. Joffe and M. Jones and K. K. Joo and T. Julius and H. Kakuno and A. B. Kaliyar and J. H. Kang and K. H. Kang and P. Kapusta and S. U. Kataoka and E. Kato and Y. Kato and P. Katrenko and H. Kawai and T. Kawasaki and T. Keck and H. Kichimi and C. Kiesling and B. H. Kim and D. Y. Kim and H. J. Kim and H. -J. Kim and J. B. Kim and J. H. Kim and K. T. Kim and M. J. Kim and S. H. Kim and S. K. Kim and Y. J. Kim and K. Kinoshita and C. Kleinwort and J. Klucar and B. R. Ko and N. Kobayashi and S. Koblitz and P. Kodyš and Y. Koga and S. Korpar and D. Kotchetkov and R. T. Kouzes and P. Križan and P. Krokovny and B. Kronenbitter and T. Kuhr and R. Kulasiri and R. Kumar and T. Kumita and E. Kurihara and Y. Kuroki and A. Kuzmin and P. Kvasnička and Y. -J. Kwon and Y. -T. Lai and J. S. Lange and D. H. Lee and I. S. Lee and S. -H. Lee and M. Leitgab and R. Leitner and D. Levit and P. Lewis and C. H. Li and H. Li and J. Li and L. Li and X. Li and Y. Li and L. Li Gioi and J. Libby and A. Limosani and C. Liu and Y. Liu and Z. Q. Liu and D. Liventsev and A. Loos and R. Louvot and M. Lubej and P. Lukin and T. Luo and J. MacNaughton and M. Masuda and T. Matsuda and D. Matvienko and A. Matyja and S. McOnie and Y. Mikami and K. Miyabayashi and Y. Miyachi and H. Miyake and H. Miyata and Y. Miyazaki and R. Mizuk and G. B. Mohanty and S. Mohanty and D. Mohapatra and A. Moll and H. K. Moon and T. Mori and T. Morii and H. -G. Moser and T. Müller and N. Muramatsu and R. Mussa and T. Nagamine and Y. Nagasaka and Y. Nakahama and I. Nakamura and K. R. Nakamura and E. Nakano and H. Nakano and T. Nakano and M. Nakao and H. Nakayama and H. Nakazawa and T. Nanut and K. J. Nath and Z. Natkaniec and M. Nayak and E. Nedelkovska and K. Negishi and K. Neichi and C. Ng and C. Niebuhr and M. Niiyama and N. K. Nisar and S. Nishida and K. Nishimura and O. Nitoh and T. Nozaki and A. Ogawa and S. Ogawa and T. Ohshima and S. Okuno and S. L. Olsen and Y. Ono and Y. Onuki and W. Ostrowicz and C. Oswald and H. Ozaki and P. Pakhlov and G. Pakhlova and B. Pal and H. Palka and E. Panzenböck and C. -S. Park and C. W. Park and H. Park and K. S. Park and S. Paul and L. S. Peak and T. K. Pedlar and T. Peng and L. Pesántez and R. Pestotnik and M. Peters and M. Petrič and L. E. Piilonen and A. Poluektov and K. Prasanth and M. Prim and K. Prothmann and C. Pulvermacher and M. V. Purohit and J. Rauch and B. Reisert and E. Ribežl and M. Ritter and J. Rorie and A. Rostomyan and M. Rozanska and S. Rummel and S. Ryu and H. Sahoo and T. Saito and K. Sakai and Y. Sakai and S. Sandilya and D. Santel and L. Santelj and T. Sanuki and J. Sasaki and N. Sasao and Y. Sato and V. Savinov and T. Schlüter and O. Schneider and G. Schnell and P. Schönmeier and M. Schram and C. Schwanda and A. J. Schwartz and B. Schwenker and R. Seidl and Y. Seino and D. Semmler and K. Senyo and O. Seon and I. S. Seong and M. E. Sevior and L. Shang and M. Shapkin and V. Shebalin and C. P. Shen and T. -A. Shibata and H. Shibuya and N. Shimizu and S. Shinomiya and J. -G. Shiu and B. Shwartz and A. Sibidanov and F. Simon and J. B. Singh and R. Sinha and P. Smerkol and Y. -S. Sohn and A. Sokolov and Y. Soloviev and E. Solovieva and S. Stanič and M. Starič and M. Steder and J. F. Strube and J. Stypula and S. Sugihara and A. Sugiyama and M. Sumihama and K. Sumisawa and T. Sumiyoshi and K. Suzuki and K. Suzuki and S. Suzuki and S. Y. Suzuki and Z. Suzuki and H. Takeichi and M. Takizawa and U. Tamponi and M. Tanaka and S. Tanaka and K. Tanida and N. Taniguchi and G. N. Taylor and F. Tenchini and Y. Teramoto and I. Tikhomirov and K. Trabelsi and V. Trusov and T. Tsuboyama and M. Uchida and T. Uchida and S. Uehara and K. Ueno and T. Uglov and Y. Unno and S. Uno and S. Uozumi and P. Urquijo and Y. Ushiroda and Y. Usov and S. E. Vahsen and C. Van Hulse and P. Vanhoefer and G. Varner and K. E. Varvell and K. Vervink and A. Vinokurova and V. Vorobyev and A. Vossen and M. N. Wagner and E. Waheed and C. H. Wang and J. Wang and M. -Z. Wang and P. Wang and X. L. Wang and M. Watanabe and Y. Watanabe and R. Wedd and S. Wehle and E. White and E. Widmann and J. Wiechczynski and K. M. Williams and E. Won and B. D. Yabsley and S. Yamada and H. Yamamoto and J. Yamaoka and Y. Yamashita and M. Yamauchi and S. Yashchenko and H. Ye and J. Yelton and Y. Yook and C. Z. Yuan and Y. Yusa and C. C. Zhang and L. M. Zhang and Z. P. Zhang and L. Zhao and V. Zhilich and V. Zhukova and V. Zhulanov and M. Ziegler and T. Zivko and A. Zupanc and N. Zwahlen},
journal= {arXiv preprint arXiv:1611.06648},
year = {2016}
}
Comments
14 pages, 7 figures