6533b7d2fe1ef96bd125f638

RESEARCH PRODUCT

Precision measurement of the mass of the tau lepton

M. AblikimM.  . N. AchasovAi X.  . C.O. AlbayrakM. AlbrechtD.  . J. AmbroseAn F.  . F.Q. AnJ.  . Z. BaiR. Baldini FerroliY. BanJ.  . V. BennettM. BertaniJ.  . M. BianE. BogerO. BondarenkoI. BoykoS. BraunRoy A. BriereH. CaiX. CaiO. CakirA. CalcaterraG.  . F. CaoS.  . A. CetinJ.  . F. ChangG. ChelkovG. ChenH.  . S. ChenJ.  . C. ChenM.  . L. ChenS.  . J. ChenX. ChenX.  . R. ChenY.  . B. ChenH.  . P. ChengX.  . K. ChuY.  . P. ChuD. Cronin HennessyH.  . L. DaiJ.  . P. DaiD. DedovichZ.  . Y. DengA. DenigI. DenysenkoMarco Giovanni DestefanisW.  . M. DingY. DingC. DongJ. DongL.  . Y. DongM.  . Y. DongDu S.  . X.J.  . Z. FanJ. FangS.  . S. FangY. FangL. FavaC.  . Q. FengFu C.  . D.O. FuksQ. GaoY. GaoC. GengK. GoetzenW.  . X. GongW. GradlMichela GrecoGu M.  . H.Gu Y.  . T.Y.  . H. GuanA.  . Q. GuoL.  . B. GuoT. GuoY.  . P. GuoY.  . P. GuoY.  . L. HanF.  . A. HarrisHe K.  . L.M. HeHe Z.  . Y.T. HeldY.  . K. HengZ.  . L. HouC. HuHu H.  . M.Jifeng HuT. HuG.  . M. HuangG.  . S. HuangH.  . P. HuangJ.  . S. HuangL. HuangX.  . T. HuangY. HuangT. HussainJi C.  . S.Q. JiJi Q.  . P.Ji X.  . B.Ji X.  . L.L.  . L. JiangL.  . W. JiangX.  . S. JiangJ.  . B. JiaoZ. JiaoD.  . P. JinS. JinT. JohanssonN. Kalantar NayestanakiX.  . L. KangX.  . S. KangM. KavatsyukB. KlossB. KopfM. KornicerW. KuehnA. KupscW. LaiJ.  . S. LangeM. LaraP. LarinM. LeyheLi C.  . H.Li ChengLi CuiD. LiLi D.  . M.F. LiG. LiLi H.  . B.Li J.  . C.K. LiK. LiLi LeiLi P.  . R.Li Q.  . J.T. LiLi W.  . D.Li W.  . G.Li X.  . L.Li X.  . N.Li X.  . Q.Li Z.  . B.H. LiangY.  . F. LiangY.  . T. LiangD.  . X. LinB.  . J. LiuC.  . L. LiuC.  . X. LiuF.  . H. LiuLiu FangLiu FengH.  . B. LiuH.  . H. LiuH.  . M. LiuJ. LiuJ.  . P. LiuK. LiuK.  . Y. LiuP.  . L. LiuQ. LiuS.  . B. LiuX. LiuY.  . B. LiuZ.  . A. LiuLiu ZhiqiangLiu ZhiqingH. LoehnerX.  . C. LouLu G.  . R.Lu H.  . J.Lu H.  . L.Lu J.  . G.Lu X.  . R.Y. LuLu Y.  . P.C.  . L. LuoM.  . X. LuoT. LuoX.  . L. LuoM. LvMa F.  . C.Ma H.  . L.Ma Q.  . M.S. MaT. MaMa X.  . Y.F.  . E. MaasMarco MaggioraQ.  . A. MalikY.  . J. MaoZ.  . P. MaoJ.  . G. MesschendorpJ. MinT.  . J. MinR.  . E. MitchellMo X.  . H.Mo Y.  . J.H. MoeiniC. Morales MoralesK. MoriyaN.  . Y. U. MuchnoiH. MuramatsuY. NefedovI.  . B. NikolaevZ. NingS. NisarX.  . Y. NiuS.  . L. OlsenQ. OuyangS. PacettiM. PelizaeusH.  . P. PengK. PetersJ.  . L. PingR.  . G. PingR. Poling N. Q.M. QiS. QianC.  . F. QiaoL.  . Q. QinX.  . S. QinY. QinZ.  . H. QinJ.  . F. QiuK.  . H. RashidC.  . F. RedmerM. RipkaG. RongX.  . D. RuanA. SarantsevK. SchoenningS. SchumannW. ShanM. ShaoC.  . P. ShenX.  . Y. ShenH.  . Y. ShengM.  . R. ShepherdW.  . M. SongX.  . Y. SongStefano Giovanni SpataroB. SpruckG.  . X. SunJ.  . F. SunS.  . S. SunY.  . J. SunY.  . Z. SunZ.  . J. SunZ.  . T. SunC.  . J. TangX. TangI. TapanE.  . H. ThorndikeD. TothM. UllrichI. UmanG.  . S. VarnerB. WangD. WangD.  . Y. WangK. WangL.  . L. WangL.  . S. WangM. WangP. WangP.  . L. WangQ.  . J. WangS.  . G. WangW. WangX.  . F. WangY.  . D. WangY.  . F. WangY.  . Q. WangZ. WangZ.  . G. WangZ.  . H. WangZ.  . Y. WangD.  . H. WeiJ.  . B. WeiP. WeidenkaffS.  . P. WenM. WernerU. WiednerM. WolkeWu L.  . H.N. WuZ. WuL.  . G. XiaY. XiaD. XiaoZ.  . J. XiaoY.  . G. XieQ.  . L. XiuXu G.  . F.L. XuXu Q.  . J.Xu Q.  . N.Xu X.  . P.Z. XueL. YanW.  . B. YanW.  . C. YanY.  . H. YanH.  . X. YangL. YangY. YangY.  . X. YangH. YeM. YeYe M.  . H.Yu B.  . X.Yu C.  . X.Yu H.  . W.Yu J.  . S.Yu S.  . P.C.  . Z. YuanW.  . L. YuanY. YuanA.  . A. ZafarA. ZalloS.  . L. ZangY. ZengB.  . X. ZhangB.  . Y. ZhangC. ZhangC.  . B. ZhangC.  . C. ZhangD.  . H. ZhangH.  . H. ZhangH.  . Y. ZhangJ.  . J. ZhangJ.  . Q. ZhangJ.  . W. ZhangJ.  . Y. ZhangJ.  . Z. ZhangS.  . H. ZhangX.  . J. ZhangX.  . Y. ZhangY. ZhangY.  . H. ZhangZ.  . H. ZhangZ.  . P. ZhangZ.  . Y. ZhangG. ZhaoJ.  . W. ZhaoZhao LeiZhao LingM.  . G. ZhaoQ. ZhaoQ.  . W. ZhaoS.  . J. ZhaoT.  . C. ZhaoX.  . H. ZhaoY.  . B. ZhaoZ.  . G. ZhaoA. ZhemchugovB. ZhengJ.  . P. ZhengY.  . H. ZhengB. ZhongL. ZhouLi ZhouX. ZhouX.  . K. ZhouX.  . R. ZhouX.  . Y. ZhouK. ZhuK.  . J. ZhuX.  . L. ZhuY.  . C. ZhuY.  . S. ZhuZ.  . A. ZhuJ. ZhuangB.  . S. ZouJ.  . H. Zou

subject

PhysicsNuclear and High Energy PhysicsParticle physicsAnnihilation010308 nuclear & particles physicshep-exElectron–positron annihilationMaximum likelihoodSingle measurementDetectorBESIII01 natural sciencesDECAYSHigh Energy Physics - ExperimentNuclear physicsENERGYPair production0103 physical sciencesRADIATIVE-CORRECTIONSHigh Energy Physics::Experiment010306 general physicsANNIHILATIONDETECTORSYSTEMLepton

description

An energy scan near the $\tau$ pair production threshold has been performed using the BESIII detector. About $24$ pb$^{-1}$ of data, distributed over four scan points, was collected. This analysis is based on $\tau$ pair decays to $ee$, $e\mu$, $eh$, $\mu\mu$, $\mu h$, $hh$, $e\rho$, $\mu\rho$ and $\pi\rho$ final states, where $h$ denotes a charged $\pi$ or $K$. The mass of the $\tau$ lepton is measured from a maximum likelihood fit to the $\tau$ pair production cross section data to be $m_{\tau} = (1776.91\pm0.12 ^{+0.10}_{-0.13}$) MeV/$c^2$, which is currently the most precise value in a single measurement.

10.1103/physrevd.90.012001http://hdl.handle.net/2318/155098