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题名: Is D-S(J)+ (2632) the first radial excitation of D-S(*)(2112)?
作者: Chang, CH ;  Kim, CS ;  Wang, GL
刊名: PHYSICS LETTERS B
出版日期: 2005
卷号: 623, 期号:40972, 页码:218-226
关键词: RELATIVISTIC SALPETER METHOD ;  HEAVY MESON ;  D-SJ(+)(2632) ;  SELEX ;  STATE
学科分类: Physics
通讯作者: Chang, CH , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
部门归属: Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; CCAST, World Lab, Beijing 100080, Peoples R China; Yonsei Univ, Dept Phys, Seoul 120749, South Korea; Harbin Inst Technol, Dept Phys, Harbin 150006, Peoples R China
英文摘要: We present a quantitative analysis of the D-sJ(+) (2632) observed by SELEX mainly focusing on the assumption that D-sJ(+) (2632) is the first radial excitation of the 1(-) ground state D-s(*)(2112). By solving the instantaneous Bethe-Salpeter equation, we obtain the mass 2658 +/- 15 MeV for the first excited state, which is about 26 MeV heavier than the experimental value 2632 +/- 1.7 MeV. By means of PCAC and low-energy theorem we calculate the transition matrix elements and obtain the decay widths: Gamma(D-sJ(+) -> D(s)(+)eta) = 4.07 +/- 0.34 MeV, Gamma(D-sJ(+), (DK+)-K-0) similar or equal to Gamma(Gamma(D-sJ(+) -> (D+K0)) = 8.9 +/- 1.2 MeV, and the ratio Gamma(D-sJ(+) -> (DK+)-K-0)/Gamma(D-sJ(+) -> D(s)(+)eta) = 2.2 +/- 0.2 as well. This ratio is quite different from the SELEX data 0.14 +/- 0.06. The summed decay width of those three channels is approximately 21.7 MeV, already larger than the observed bound for the full width (<= 17 MeV). Furthermore, assuming D-sJ(+) (2632) is 1(-) state, we also explore the possibility of S-D wave mixing to explain the SELEX observation. Based on our analysis, we suspect that it is too early to conclude that D-sJ(+)(2632) is the first radial excitation of the 1(-) ground state D-s(*)(2112). More precise measurements of the relative ratios and the total decay width are urgently required, especially for S-D wave mixing. (c) 2005 Elsevier B.V. All rights reserved.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000232071000005
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内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13750
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Chang, CH,Kim, CS,Wang, GL. Is D-S(J)+ (2632) the first radial excitation of D-S(*)(2112)?[J]. PHYSICS LETTERS B,2005,623(40972):218-226.
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