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arxiv: 1707.09167 · v2 · submitted 2017-07-28 · ✦ hep-ex

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Angular analysis of the e^+ e^- to D^{(*) pm} D^{* mp} process near the open charm threshold using initial-state radiation

Belle Collaboration: V. Zhukova , H. Aihara , S. Al Said , D. M. Asner , V. Aulchenko , T. Aushev , R. Ayad , V. Babu
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I. Badhrees P. Behera B. Bhuyan J. Biswal A. Bobrov G. Bonvicini A. Bozek M. Bra\v{c}ko T. E. Browder D. \v{C}ervenkov V. Chekelian A. Chen B. G. Cheon K. Chilikin K. Cho S.-K. Choi Y. Choi D. Cinabro T. Czank N. Dash S. Di Carlo Z. Dole\v{z}al Z. Dr\'asal S. Eidelman H. Farhat J. E. Fast T. Ferber B. G. Fulsom V. Gaur A. Garmash R. Gillard P. Goldenzweig O. Grzymkowska E. Guido J. Haba K. Hayasaka H. Hayashii M. T. Hedges W.-S. Hou K. Inami G. Inguglia A. Ishikawa R. Itoh M. Iwasaki Y. Iwasaki W. W. Jacobs I. Jaegle H. B. Jeon S. Jia Y. Jin T. Julius K. H. Kang G. Karyan C. Kiesling D. Y. Kim K. T. Kim S. H. Kim S. Korpar D. Kotchetkov P. Kri\v{z}an P. Krokovny R. Kulasiri Y.-J. Kwon J. S. Lange L. Li L. Li Gioi D. Liventsev T. Luo M. Masuda T. Matsuda M. Merola K. Miyabayashi H. Miyata R. Mizuk G. B. Mohanty H. K. Moon T. Mori M. Nakao T. Nanut K. J. Nath M. Nayak M. Niiyama N. K. Nisar S. Nishida S. Ogawa S. L. Olsen H. Ono B. Pal C.-S. Park C. W. Park S. Paul T. K. Pedlar R. Pestotnik L. E. Piilonen C. Pulvermacher A. Rostomyan Y. Sakai M. Salehi S. Sandilya T. Sanuki O. Schneider G. Schnell C. Schwanda Y. Seino K. Senyo M. E. Sevior V. Shebalin T.-A. Shibata J.-G. Shiu B. Shwartz F. Simon A. Sokolov E. Solovieva M. Stari\v{c} T. Sumiyoshi M. Takizawa K. Tanida F. Tenchini K. Trabelsi M. Uchida S. Uehara T. Uglov Y. Unno S. Uno Y. Usov C. Van Hulse G. Varner A. Vinokurova V. Vorobyev E. Waheed C. H. Wang M.-Z. Wang P. Wang X. L. Wang Y. Watanabe S. Watanuki E. Won Y. Yamashita Y. Yusa Z. P. Zhang V. Zhilich V. Zhulanov A. Zupanc
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classification ✦ hep-ex
keywords analysiscrossangularbelleexclusivefirstinitial-statemeasurement
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We report a new measurement of the exclusive $e^+ e^- \to D^{(*) \pm} D^{*\mp}$ cross sections as a function of the center-of-mass energy from the $D^{(*) \pm} D^{* \mp}$ threshold through $\sqrt{s}=6.0$ GeV with initial-state radiation. The analysis is based on a data sample collected with the Belle detector with an integrated luminosity of $951$ fb$^{-1}$. The accuracy of the cross section measurement is increased by a factor of two over the first Belle study. We perform the first angular analysis of the $e^+ e^- \to D^{* \pm} D^{* \mp}$ process and decompose this exclusive cross section into three components corresponding to the $D^*$ helicities.

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