Precise measurement of the e+e－→π+π－(γ) cross section with the initial state radiation method at BABAR

WANG Wen-Feng (for the BABAR collaboration)

doi:10.1088/1674-1137/34/6/014

Chinese Physics C> 2010, Vol. 34> Issue(6) : 692-697 DOI: 10.1088/1674-1137/34/6/014

Precise measurement of the e⁺e^－→π⁺π^－(γ) cross section with the initial state radiation method at BABAR

WANG Wen-Feng (for the BABAR collaboration)

University of Notre Dame; SLAC, 2575 Sand Hill Road, Menlo Park, CA 94025, USA

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Abstract：
We present a precise BABAR measurement on the cross section of the process e⁺e^－→π⁺π^－(γ) from threshold to an energy of 3 GeV with the initial state radiation (ISR) technique, using 232 fb^－1 of data collected with the BABAR detector at e⁺e^－ center-of-mass energies near 10.58 GeV. The ISR luminosity is determined from a study of the leptonic process e+e－→μ+μ－γ(γ). The leading-order hadronic contribution to the muon magnetic anomaly calculated using the
ππ cross section measured from threshold to 1.8GeV is (514.1±2.2(stat)±3.1(syst))×10^－10.

References

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WANG Wen-Feng (for the BABAR collaboration). Precise measurement of the e⁺e^－→π⁺π^－(γ) cross section with the initial state radiation method at BABAR[J]. Chinese Physics C, 2010, 34(6): 692-697. doi: 10.1088/1674-1137/34/6/014

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Received: 2010-01-26
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Precise measurement of the e⁺e^－→π⁺π^－(γ) cross section with the initial state radiation method at BABAR

University of Notre Dame; SLAC, 2575 Sand Hill Road, Menlo Park, CA 94025, USA

Received Date: 2010-01-26

Accepted Date: 1900-01-01

Available Online: 2010-06-05

Abstract:

We present a precise BABAR measurement on the cross section of the process e⁺e^－→π⁺π^－(γ) from threshold to an energy of 3 GeV with the initial state radiation (ISR) technique, using 232 fb^－1 of data collected with the BABAR detector at e⁺e^－ center-of-mass energies near 10.58 GeV. The ISR luminosity is determined from a study of the leptonic process e+e－→μ+μ－γ(γ). The leading-order hadronic contribution to the muon magnetic anomaly calculated using the
ππ cross section measured from threshold to 1.8GeV is (514.1±2.2(stat)±3.1(syst))×10^－10.

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Precise measurement of the e⁺e^－→π⁺π^－(γ) cross section with the initial state radiation method at BABAR

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Precise measurement of the e⁺e^－→π⁺π^－(γ) cross section with the initial state radiation method at BABAR

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