First Observation of the Sigma(*+)(C) Baryon and A New Measurement of the Sigma(*+)(C) Mass R Ammar , A Bean , D Besson , R Davis , N Kwak , X Zhao , S Anderson , VV Frolov , Y Kubota , SJ Lee , R Mahapatra , JJ O'Neill , R Poling , T Riehle , A Smith , CJ Stepaniak , J Urheim , S Ahmed , MS Alam , SB Athar , L Jian , L Ling , M Saleem , S Timm , F Wappler , A Anastassov , JE Duboscq , E Eckhart , KK Gan , C Gwon , T Hart , K Honscheid , D Hufnagel , H Kagan , R Kass , TK Pedlar , H Schwarthoff , JB Thayer , E von Toerne , MM Zoeller , SJ Richichi , H Severini , P Skubic , A Undrus , S Chen , J Fast , JW Hinson , J Lee , DH Miller , EI Shibata , IPJ Shipsey , V Pavlunin , D Cronin-Hennessy , AL Lyon , EH Thorndike , CP Jessop , H Marsiske , ML Perl , V Savinov , X Zhou , TE Coan , V Fadeyev , Y Maravin , I Narsky , R Stroynowski , J Ye , T Wlodek , M Artuso , R Ayad , C Boulahouache , K Bukin , E Dambasuren , S Karamov , G Majumder , GC Moneti , R Mountain , S Schuh , T Skwarnieki , S Stone , G Viehhauser , JC Wang , A Wolf , J Wu , S Kopp , AH Mahmood , SE Csorna , I Danko , KW McLean , S Marka , Z Xu , R Godang , K Kinoshita , IC Lai , S Schrenk , G Bonvicini , D Cinabro , S McGee , LP Peresa , GJ Zhou , E Lipeles , SP Pappas , M Schmidtler , A Shapiro , WM Sun , AJ Weinstein , F Wurthwein , DE Jaffe , G Masek , HP Paar , EM Potter , S Prell , V Sharma , DM Asner , A Eppich , TS Hill , RJ Morrison , RA Briere , GP Chen , BH Behrens , WT Ford , A Gritsan , J Roy , JG Smith , JP Alexander , R Baker , C Bebek , BE Berger , K Berkelman , F Blanc , V Boisvert , DG Cassel , M Dickson , PS Drell , KM Ecklund , R Ehrlich , AD Foland , P Gaidarev , RS Galik , L Gibbons , B Gittelman , SW Gray , DL Hartill , BK Heltsley , PI Hopman , CD Jones , DL Kreinick , M Lohner , A Magerkurth , TO Meyer , NB Mistry , E Nordberg , JR Patterson , D Peterson , D Riley , JG Thayer , D Urner , B Valant-Spaight , A Warburton , P Avery , C Prescott , AI Rubiera , J Yelton , J Zheng , G Brandenburg , A Ershov , YS Gao , DYJ Kim , R Wilson , TE Browder , Y Li , JL Rodriguez , H Yamamoto , T Bergfeld , BI Eisenstein , J Ernst , GE Gladding , GD Gollin , RM Hans , E Johnson , I Karliner , MA Marsh , M Palmer , C Plager , C Sedlack , M Selen , JJ Thaler , J Williams , KW Edwards , R Janicek , PM Patel , AJ Sadoff Physical review letters（2001）
摘要
Using data recorded with the CLEO II and CLEO ILV detector configurations at the Cornell Electron Storage Rings, we report the first observation and mass measurement of the Sigma (c)*(+) charmed baryon, and an updated measurement of the mass of the Sigma (+)(c) baryon. We find M(Sigma (c)*(+)) - M(Lambda (+)(c)) = (231.0 +/- 1.1 +/- 2.0) MeV, and M(Sigma (+)(c)) - M(Lambda (+)(c)) = (166.4 +/- 0.2 +/- 0.3) MeV, where the errors are statistical and systematic, respectively.
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