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Precision measurements of the mass, the widths of ψ(3770) resonance and the cross section σ[e+e−→ψ(3770)] at Ecm=3.7724GeV

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成果类型:
期刊论文
作者:
Ablikim, M.;Bai, J. Z.;Ban, Y.;Bian, J. G.;Cai, X.;...
通讯作者:
Rong, G.
作者机构:
[Rong, G.] Inst High Energy Phys, Beijing 100049, Peoples R China.
CCAST, Beijing 100080, Peoples R China.
Guangxi Normal Univ, Guilin 541004, Peoples R China.
Guangxi Univ, Nanning 530004, Peoples R China.
Henan Normal Univ, Xinxiang 453002, Peoples R China.
通讯机构:
[Rong, G.] I
Inst High Energy Phys, Beijing 100049, Peoples R China.
语种:
英文
期刊:
Physics Letters B
ISSN:
0370-2693
年:
2007
卷:
652
期:
5-6
页码:
238-244
机构署名:
本校为其他机构
摘要:
By analyzing the R values measured at 68 energy points in the energy region between 3.650 and 3.872 GeV reported in our previous paper, we have precisely measured the mass, the total width and the leptonic width of the psi (3770) resonance to be M-psi (3770) = 3772.4 +/- 0.4 +/- 0.3 MeV, Gamma(tot)(psi(3770)) = 28.5 +/- 1.2 +/- 0.2 MeV and Gamma(ee)(psi(3770)) = 277 +/- 11 +/- 13 eV, respectively. We have measured the leptonic branching fraction of the psi (3770) of the psi (3770) production cross section at its peak to be B[psi (3770) -> e(+) e(-)] = (0.97 +/- 0.03 +/- 0.05) x 10(-5) and sigm...

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