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Measurement of the proton form factor by studying e(+)e(-) -> p(p)over-tilde
BESIII Collaboration
2015
发表期刊PHYSICAL REVIEW D
卷号91期号:11页码:112004
文章类型Article
摘要Using data samples collected with the BESIII detector at the BEPCII collider, we measure the Born cross section of e(+)e(-) -> p (p) over tilde at 12 center-of-mass energies from 2232.4 to 3671.0 MeV. The corresponding effective electromagnetic form factor of the proton is deduced under the assumption that the electric and magnetic form factors are equal (vertical bar G(E)vertical bar = vertical bar G(M)vertical bar). In addition, the ratio of electric to magnetic form factors, vertical bar G(E)/G(M)vertical bar, and vertical bar G(M)vertical bar are extracted by fitting the polar angle distribution of the proton for the data samples with larger statistics, namely at root s = 2232.4 and 2400.0 MeV and a combined sample at root s = 3050.0, 3060.0 and 3080.0 MeV, respectively. The measured cross sections are in agreement with recent results from BABAR, improving the overall uncertainty by about 30%. The vertical bar G(E)/G(M)vertical bar ratios are close to unity and consistent with BABAR results in the same q(2) region, which indicates the data are consistent with the assumption that vertical bar G(E)vertical bar = vertical bar G(M)vertical bar within uncertainties.
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.91.112004
收录类别SCI ; CA
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000355829200001
引用统计
被引频次:20[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228435
专题实验物理中心
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BESIII Collaboration. Measurement of the proton form factor by studying e(+)e(-) -> p(p)over-tilde[J]. PHYSICAL REVIEW D,2015,91(11):112004.
APA BESIII Collaboration.(2015).Measurement of the proton form factor by studying e(+)e(-) -> p(p)over-tilde.PHYSICAL REVIEW D,91(11),112004.
MLA BESIII Collaboration."Measurement of the proton form factor by studying e(+)e(-) -> p(p)over-tilde".PHYSICAL REVIEW D 91.11(2015):112004.
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