Charm hadrons from fragmentation and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi></mml:math>decays in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>e</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>e</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math>annihilation at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>10.6</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>GeV</mml:mi></mml:math>
R. SeusterUniversity of Hawaii, Honolulu, Hawaii 96822K. AbeTohoku Gakuin University, TagajoH. AiharaDepartment of Physics, University of Tokyo, TokyoY. AsanoUniversity of Tsukuba, TsukubaT. AushevInstitute for Theoretical and Experimental Physics, MoscowA. M. BakichUniversity of Sydney, Sydney NSWM. BarberoUniversity of Hawaii, Honolulu, Hawaii 96822I. BednyBudker Institute of Nuclear Physics, NovosibirskU. BitencJ. Stefan Institute, LjubljanaI. BizjakJ. Stefan Institute, LjubljanaA. BożekH. Niewodniczanski Institute of Nuclear Physics, KrakowM. BračkoHigh Energy Accelerator Research Organization (KEK), TsukubaJ. BrodzickaH. Niewodniczanski Institute of Nuclear Physics, KrakowA. ChenNational Central University, Chung-liB. G. CheonChonnam National University, KwangjuY. ChoiSungkyunkwan University, SuwonA. ChuvikovPrinceton University, Princeton, New Jersey 08544S. ColeUniversity of Sydney, Sydney NSWJ. DalsenoUniversity of Melbourne, VictoriaM. DanilovInstitute for Theoretical and Experimental Physics, MoscowM. DashVirginia Polytechnic Institute and State University, Blacksburg, Virginia 24061L. Y. DongInstitute of High Energy Physics, Chinese Academy of Sciences, BeijingJ. DragicHigh Energy Accelerator Research Organization (KEK), TsukubaA. DrutskoyUniversity of Cincinnati, Cincinnati, Ohio 45221S. EidelmanBudker Institute of Nuclear Physics, NovosibirskF. FangUniversity of Hawaii, Honolulu, Hawaii 96822T. GershonHigh Energy Accelerator Research Organization (KEK), TsukubaA. GoNational Central University, Chung-liG. GokhrooTata Institute of Fundamental Research, BombayB. GolobJ. Stefan Institute, LjubljanaA. GorišekJ. Stefan Institute, LjubljanaK. HayasakaNagoya University, NagoyaM. HazumiHigh Energy Accelerator Research Organization (KEK), TsukubaY. HoshiTohoku Gakuin University, TagajoS. HouNational Central University, Chung-liW.-S. HouDepartment of Physics, National Taiwan University, TaipeiT. IijimaNagoya University, NagoyaK. IkadoNagoya University, NagoyaR. ItohHigh Energy Accelerator Research Organization (KEK), TsukubaM. IwasakiHigh Energy Accelerator Research Organization (KEK), TsukubaJ. H. KangKorea University, SeoulJ. S. KangKorea University, SeoulP. KapustaH. Niewodniczanski Institute of Nuclear Physics, KrakowN. KatayamaHigh Energy Accelerator Research Organization (KEK), TsukubaH. KawaiChiba University, ChibaT. KawasakiNiigata University, NiigataH. R. KhanTokyo Institute of Technology, TokyoH. KichimiHigh Energy Accelerator Research Organization (KEK), TsukubaH. J. KimKyungpook National University, TaeguS. M. KimSungkyunkwan University, SuwonP. KrižanJ. Stefan Institute, LjubljanaP. KrokovnyBudker Institute of Nuclear Physics, NovosibirskR. KulasiriUniversity of Cincinnati, Cincinnati, Ohio 45221C. C. KuoNational Central University, Chung-liA. KuzminBudker Institute of Nuclear Physics, NovosibirskY.-J. KwonYonsei University, SeoulJ. S. LangeUniversity of Frankfurt, FrankfurtT. LesiakH. Niewodniczanski Institute of Nuclear Physics, KrakowJ. LiUniversity of Science and Technology of China, HefeiS.-W. LinDepartment of Physics, National Taiwan University, TaipeiF. MandlInstitute of High Energy Physics, ViennaW. MitaroffInstitute of High Energy Physics, ViennaH. MiyakeOsaka University, OsakaY. MiyazakiNagoya University, NagoyaR. MizukInstitute for Theoretical and Experimental Physics, MoscowT. NagamineTohoku University, SendaiY. NagasakaHiroshima Institute of Technology, HiroshimaE. NakanoOsaka City University, OsakaM. NakaoHigh Energy Accelerator Research Organization (KEK), TsukubaS. NishidaHigh Energy Accelerator Research Organization (KEK), TsukubaO. NitohTokyo University of Agriculture and Technology, TokyoS. OgawaToho University, FunabashiT. OhshimaNagoya University, NagoyaT. OkabeNagoya University, NagoyaS. OkunoKanagawa University, YokohamaS. L. OlsenUniversity of Hawaii, Honolulu, Hawaii 96822Y. OnukiNiigata University, NiigataH. OzakiHigh Energy Accelerator Research Organization (KEK), TsukubaP. PakhlovInstitute for Theoretical and Experimental Physics, MoscowH. PałkaH. Niewodniczanski Institute of Nuclear Physics, KrakowC. W. ParkSungkyunkwan University, SuwonH. ParkKyungpook National University, TaeguK. S. ParkSungkyunkwan University, SuwonM. PiccoloJ. Stefan Institute, LjubljanaL. E. PiilonenVirginia Polytechnic Institute and State University, Blacksburg, Virginia 24061Y. SakaiHigh Energy Accelerator Research Organization (KEK), TsukubaN. SatoNagoya University, NagoyaT. SchietingerSwiss Federal Institute of Technology of Lausanne, EPFL, LausanneO. SchneiderSwiss Federal Institute of Technology of Lausanne, EPFL, LausanneJ. SchümannDepartment of Physics, National Taiwan University, TaipeiC. SchwandaInstitute of High Energy Physics, ViennaM. E. SeviorUniversity of Melbourne, VictoriaH. ShibuyaToho University, FunabashiV. SidorovBudker Institute of Nuclear Physics, NovosibirskA. SomovUniversity of Cincinnati, Cincinnati, Ohio 45221N. SoniPanjab University, ChandigarhR. StamenHigh Energy Accelerator Research Organization (KEK), TsukubaS. StaničNova Gorica Polytechnic, Nova GoricaM. StaričJ. Stefan Institute, LjubljanaS. Y. SuzukiHigh Energy Accelerator Research Organization (KEK), Tsukuba
2006lv
ABI
Аннотация
We present an analysis of charm quark fragmentation at 10.6 GeV, based on a data sample of $103\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected by the Belle detector at the KEKB accelerator. We consider fragmentation into the main charmed hadron ground states, namely ${D}^{0},{D}^{+},{D}_{s}^{+}$ and ${\ensuremath{\Lambda}}_{c}^{+}$, as well as the excited states ${D}^{*0}$ and ${D}^{*+}$. The fragmentation functions are important to measure as they describe processes at a low energy scale, where calculations in perturbation theory lead to large uncertainties. Fragmentation functions can also be used as input distributions for Monte Carlo generators. Additionally, we determine the average number of these charmed hadrons produced per $B$ decay at the $\ensuremath{\Upsilon}(4S)$ resonance and measure the distribution of their production angle in ${e}^{+}{e}^{\ensuremath{-}}$ annihilation events and in $B$ decays.
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