کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9860752 | 1528968 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Confirmation of the doubly charmed baryon Îcc+(3520) via its decay to pD+Kâ
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Confirmation of the doubly charmed baryon Îcc+(3520) via its decay to pD+Kâ Confirmation of the doubly charmed baryon Îcc+(3520) via its decay to pD+Kâ](/preview/png/9860752.png)
چکیده انگلیسی
We observe a signal for the doubly charmed baryon Îcc+ in the decay mode Îcc+âpD+Kâ to complement the previous reported decay Îcc+âÎc+KâÏ+ in data from SELEX, the charm hadroproduction experiment at Fermilab. In this new decay mode we observe an excess of 5.62 events over a combinatoric background estimated by event mixing to be 1.38±0.13 events. The mixed background has Gaussian statistics, giving a signal significance of 4.8Ï. The Poisson probability that a background fluctuation can produce the apparent signal is less than 6.4Ã10â4. The observed mass of this state is 3518±3MeV/c2, consistent with the published result. Averaging the two results gives a mass of 3518.7±1.7MeV/c2. The observation of this new weak decay mode confirms the previous SELEX suggestion that this state is a double charm baryon. The relative branching ratio for these two modes is 0.36±0.21.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 628, Issues 1â2, 3 November 2005, Pages 18-24
Journal: Physics Letters B - Volume 628, Issues 1â2, 3 November 2005, Pages 18-24
نویسندگان
SELEX Collaboration SELEX Collaboration, A. Ocherashvili, M.A. Moinester, J. Russ, J. Engelfried, I. Torres, U. Akgun, G. Alkhazov, J. Amaro-Reyes, A.G. Atamantchouk, A.S. Ayan, M.Y. Balatz, N.F. Bondar, P.S. Cooper, L.J. Dauwe, G.V. Davidenko,