Absolute photon energy calibration for the BESⅢ EMC

BIAN Jian-Ming; HE Kang-Lin; LI Wei-Guo; HU Tao; FU Cheng-Dong; HUANG Bin; LIU Ying; NING Fei-Peng; SONG Wen-Bo; SUN Sheng-Sen; XU Min; YAN Jie; YAN Liang

doi:10.1088/1674-1137/34/1/013

Chinese Physics C> 2010, Vol. 34> Issue(1) : 72-77 DOI: 10.1088/1674-1137/34/1/013

Absolute photon energy calibration for the BESⅢ EMC

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Abstract：
The absolute energy calibration with photons from π⁰'s for the BESⅢ EMC is discussed. Using 3 million hadronic events, the preliminary results are
presented. Precision of about 1% in the photon energy measurement is
obtained from crossing check using photons in ψ(2S)→γχ_c1,2(1P).

References

[1]

Preliminary Design Report of The BESID Detector,IHEP-BEPC-SB-13[2] BAI J Z et al.(BES Collaboration).Nucl.Instrum.Methods Phys.Res.,Sect.A,2001,458:627; 1994,344:319[3] Asner D M et al.Physics at BESHI,IHEP-Physics-Report-BESIII-2008-001,arXiv:0809.1869[4] Viehhausser G et al.Nucl.Instrum.Methods A,2001,462:146[5] Oreglia M et al.Phys.Rev.D,1982,25:2559[6] DENG Zi-Yan et al.HEP NP,2006,30(5):371-377 (in Chinese)[7] LI Wei-Dong,LIU Huai-Min et al.The Offline Software for the BESⅢ Experiment.Proceeding of CHEP06.Mumbai,India,2006[8] Bauer A J M.BaBar Note 521.2000[9] Bukin A,Marsiske H.BaBar Note 433.1996[10] LI S,Heltsley B.CBX 02-17[11] PING Rong-Gang.Chin.Phys.C (HEP NP),2008,32(8):599-602[12] Amsler C et al.Physics Letters B,2008,667:1

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BIAN Jian-Ming, HE Kang-Lin, LI Wei-Guo, HU Tao, FU Cheng-Dong, HUANG Bin, LIU Ying, NING Fei-Peng, SONG Wen-Bo, SUN Sheng-Sen, XU Min, YAN Jie, YAN Liang and Absolute photon energy calibration for the BESⅢ EMC[J]. Chinese Physics C, 2010, 34(1): 72-77. doi: 10.1088/1674-1137/34/1/013

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Received: 2009-03-02
Revised: 2009-03-26

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沈阳化工大学材料科学与工程学院沈阳 110142

Absolute photon energy calibration for the BESⅢ EMC

Corresponding author: BIAN Jian-Ming,

Received Date: 2009-03-02
Accepted Date: 2009-03-26
Available Online: 2010-01-05

Abstract: The absolute energy calibration with photons from π⁰'s for the BESⅢ EMC is discussed. Using 3 million hadronic events, the preliminary results are
presented. Precision of about 1% in the photon energy measurement is
obtained from crossing check using photons in ψ(2S)→γχ_c1,2(1P).