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| 題名: | Observation of a new Ξ b baryon |
| 作者: | 張元翰;Chatrchyan, S.;Wagner, P.;Waltenberger, W.;De Wolf, E. A.;Luyckx, S.;Roland, B.;Blyweert, S.;Vanelderen, L.;Schul, N.;Beliy, N.;Hammad, G. H.;Mundim, L.;Genchev, V.;Guo, S.;Li, W.;Karjalainen, A.;Fassi, F.;Chasserat, J.;Perieanu, A.;Lingemann, J.;Hoehle, F.;Rennefeld, J.;Dammann, D.;Eckstein, D.;Walsh, R.;Draeger, J.;Erfle, J.;Oehler, A.;Röcker, S.;Kesisoglou, S.;Palinkas, J.;Bhattacharya, S.;Etesami, S. M.;Fahim, A.;Chhibra, S. S.;Castro, A.;Fanò, L.;Menichelli, M.;Dell’Orso, R.;Paramatti, R.;Mariotti, C.;Kong, D. J.;Moon, D. H.;Dominik, W.;Krasnikov, N.;Ershov, A.;Perfilov, M.;Popov, A.;Krychkine, V.;Volkov, A.;Delgado Peris, A.;Diez Pardos, C.;Fernandez Bedoya, C.;Fouz, M. C.;de Trocóniz, J. F.;Vilar Cortabitarte, R.;Di Guida, S.;Govoni, P.;Polese, G.;Sekmen, S.;Simon, M.;Kaestli, H. C.;Ocalan, K.;Heath, G. P.;Basso, L.;Ferguson, W.;Khan, A.;Cox, P. T.;Jeng, G. Y.;Wilken, R.;Cittolin, S.;Danielson, T.;Krutelyov, V.;Chen, Y.;Rogan, C.;Maruyama, S.;Dobur, D.;Hugon, J.;Skhirtladze, N.;Haas, J.;Adams, M. R.;Cavanaugh, R.;Noonan, D.;Kellogg, R. G.;Butt, J.;Malik, S.;Ofierzynski, R. A.;Gerbaudo, D.;Tully, C.;Kress, M.;Svyatkovskiy, A.;Boulahouache, C.;Roberts, J.;Arora, S.;Chou, J. P.;Gray, R.;Rekovic, V.;Flanagan, W.;Pakhotin, Y.;Ledovskoy, A. |
| 貢獻者: | 理學院物理學系 |
| 日期: | 2012-06-21 |
| 上傳時間: | 2026-04-23 12:33:37 (UTC+8) |
| 出版者: | United States: American Physical Society |
| 摘要: | 摘要： The observation of a new b baryon via its strong decay into Ξ(b)(-) π(+) (plus charge conjugates) is reported. The measurement uses a data sample of pp collisions at sqrt[s] = 7 TeV collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 5.3 fb(-1). The known Ξ(b)(-) baryon is reconstructed via the decay chain Ξ(b)(-) → J/ψΞ(-) → μ(+) μ(-) Λ(0) π(-), with Λ(0) → pπ(-). A peak is observed in the distribution of the difference between the mass of the Ξ(b)(-) π(+) system and the sum of the masses of the Ξ(b)(-) and π(+), with a significance exceeding 5 standard deviations. The mass difference of the peak is 14.84 ± 0.74(stat) ± 0.28(syst) MeV. The new state most likely corresponds to the J(P) = 3/2(+) companion of the Ξ(b).
其他題名： Phys Rev Lett
出版者： United States: American Physical Society
出版日期： 2012-06-21
出處： Physical review letters, 2012-06, Vol.108 (25), p.252002, Article 252002
資源來源： American Physical Society Journals (NTUSG)
識別號： ISSN: 0031-9007
識別號： ISSN: 1079-7114
識別號： EISSN: 1079-7114
識別號： DOI: 10.1103/PhysRevLett.108.252002
識別號： PMID: 23004588 |
| 顯示於類別: | [物理學系] 期刊論文
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