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Observation of Bc mesons in pp- collisions at sqrt[s]=1.8 TeV
http://hdl.handle.net/2241/103693
http://hdl.handle.net/2241/103693c9e08d20-931c-472d-9bcd-c032c0ce4832
名前 / ファイル | ライセンス | アクション |
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PRD_58-11.pdf (970.0 kB)
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Item type | Journal Article(1) | |||||
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公開日 | 2009-09-28 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Observation of Bc mesons in pp- collisions at sqrt[s]=1.8 TeV | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
著者 |
CDF Collaboration
× CDF Collaboration× Hara, K.× Ikeda, H.× Kim, S. H. |
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著者別名 |
原, 和彦
× 原, 和彦× 金, 信弘 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We report the observation of bottom-charmed mesons Bc in 1.8 TeV pp- collisions using the CDF detector at the Fermilab Tevatron. The Bc mesons were found through their semileptonic decays, Bc±→J/ψl±X. A fit to the J/ψl mass distribution yielded 20.4-5.5+6.2 events from Bc mesons. A test of the null hypothesis, i.e., an attempt to fit the data with background alone, was rejected at the level of 4.8 standard deviations. By studying the quality of the fit as a function of the assumed Bc mass, we determined M(Bc)=6.40±0.39 (stat.)±0.13 (syst) GeV/c2. From the distribution of trilepton intersection points in the plane transverse to the beam direction we measured the Bc lifetime to be τ(Bc)=0.46-0.16+0.18 (stat)±0.03 (syst) ps. We also measured the ratio of production cross section times branching fraction for Bc+→J/ψl+ν relative to that for B+→J/ψK+ to be σ(Bc)×B(Bc→J/ψlν) / σ(B)×B(B→J/ψK)=0.132-0.037+0.041 (stat)±0.031 (syst)-0.020+0.032(lifetime). | |||||
言語 | en | |||||
書誌情報 |
en : Physical review D 巻 58, 号 11, p. 112004, 発行日 1998-11 |
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ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 2470-0010 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00773624 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1103/PhysRevD.58.112004 | |||||
権利 | ||||||
言語 | en | |||||
権利情報 | c1998 The American Physical Society | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
出版者 | ||||||
言語 | en | |||||
出版者 | The American Physical Society | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2241/103693 | |||||
識別子タイプ | HDL |