Measurement of the $e^+e^- \to B_s^0 \bar{B}_s^0 X$ cross section in the energy range from $10.63$ to $11.02$ GeV using inclusive $D_s^{\pm}$ and $D^0$ production

A. B. Kaliyar; A. Bobrov; A. Bondar; A. Bozek; A. Garmash; A. Giri; A. Ishikawa; A. J. Schwartz; A. Korobov; A. Kuzmin

arxiv: 2305.10098 · v2 · pith:MUXQBV56new · submitted 2023-05-17 · ✦ hep-ex

Measurement of the e^+e^- to B_s⁰ bar{B}_s⁰ X cross section in the energy range from 10.63 to 11.02 GeV using inclusive D_s^(pm) and D⁰ production

Belle Collaboration: V. Zhukova , R. Mizuk , I. Adachi , H. Aihara , S. Al Said , D. M. Asner , H. Atmacan , V. Aulchenko

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T. Aushev R. Ayad V. Babu Sw. Banerjee M. Bauer P. Behera K. Belous J. Bennett F. Bernlochner M. Bessner T. Bilka D. Biswas A. Bobrov D. Bodrov A. Bondar J. Borah A. Bozek M. Bra\v{c}ko P. Branchini T. E. Browder M. Campajola L. Cao D. \v{C}ervenkov M.-C. Chang B. G. Cheon K. Chilikin H. E. Cho K. Cho S.-K. Choi Y. Choi S. Choudhury D. Cinabro S. Das G. De Nardo G. De Pietro R. Dhamija F. Di Capua T. V. Dong S. Dubey P. Ecker D. Epifanov T. Ferber D. Ferlewicz B. G. Fulsom V. Gaur A. Garmash A. Giri P. Goldenzweig T. Gu K. Gudkova C. Hadjivasiliou T. Hara K. Hayasaka S. Hazra M. T. Hedges D. Herrmann W.-S. Hou C.-L. Hsu K. Inami N. Ipsita A. Ishikawa R. Itoh M. Iwasaki Y. Iwasaki W. W. Jacobs E.-J. Jang S. Jia Y. Jin K. K. Joo A. B. Kaliyar T. Kawasaki C. Kiesling C. H. Kim D. Y. Kim K.-H. Kim Y.-K. Kim K. Kinoshita P. Kody\v{s} A. Korobov S. Korpar E. Kovalenko P. Kri\v{z}an P. Krokovny M. Kumar R. Kumar A. Kuzmin Y.-J. Kwon Y.-T. Lai T. Lam M. Laurenza S. C. Lee D. Levit L. K. Li J. Libby K. Lieret D. Liventsev Y. Ma M. Masuda T. Matsuda S. K. Maurya F. Meier M. Merola F. Metzner K. Miyabayashi G. B. Mohanty I. Nakamura T. Nakano M. Nakao Z. Natkaniec A. Natochii L. Nayak N. K. Nisar S. Nishida K. Ogawa S. Ogawa H. Ono P. Oskin P. Pakhlov G. Pakhlova T. Pang S. Pardi H. Park J. Park S.-H. Park A. Passeri S. Patra S. Paul T. K. Pedlar R. Pestotnik L. E. Piilonen T.Podobnik E. Prencipe M. T. Prim N. Rout G. Russo D. Sahoo Y. Sakai S. Sandilya L. Santelj V. Savinov G. Schnell C. Schwanda A. J. Schwartz Y. Seino K. Senyo W. Shan M. Shapkin C. Sharma J.-G. Shiu A. Sokolov E. Solovieva M. Stari\v{c} Z. S. Stottler M. Sumihama W. Sutcliffe M. Takizawa K. Tanida F. Tenchini R. Tiwary K. Trabelsi M. Uchida Y. Unno S. Uno Y. Usov S. E. Vahsen G. Varner A. Vinokurova D. Wang E. Wang M.-Z. Wang X. L. Wang M. Watanabe S. Watanuki O. Werbycka E. Won B. D. Yabsley W. Yan J. H. Yin C. Z. Yuan L. Yuan Z. P. Zhang V. Zhilich

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We report the first measurement of the inclusive $e^+e^- \to b\bar{b} \to D_s^{\pm}X$ and $e^+e^- \to b\bar{b} \to D^0/\bar{D}^0X$ cross sections in the energy range from $10.63$ to $11.02$. Based on these results, we determine $\sigma(e^+ e^- \to B_s^0 \bar{B}_s^0 X)$ and $\sigma(e^+ e^- \to B\bar{B}X)$ in the same energy range. We measure the fraction of $B_s^0$ events at $\Upsilon(10860)$ to be $f_{\rm s}=(22.0^{+2.0}_{-2.1})\%$. We determine also the ratio of the $B_s^0$ inclusive branching fractions $\mathcal{B}(B_s^0 \to D^0/\bar{D}^0X)/\mathcal{B}(B_s^0 \to D_s^{\pm} X)=0.416 \pm 0.018 \pm 0.092$. The results are obtained using the data collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider.

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