Ablikim, M.Achasov, M. N.Albayrak, O.Ambrose, D. J.An, F. F.An, Q.Bai, J. Z.Lou, Xinchou2014-10-012014-10-012014-04-022014-04-020031-9007http://hdl.handle.net/10735.1/4043We study the process e⁺e⁻ → (D*D̅*)^± π^∓ at a center-of-mass energy of 4.26 GeV using a 827 pb⁻¹ data sample obtained with the BESIII detector at the Beijing Electron Positron Collider. Based on a partial reconstruction technique, the Born cross section is measured to be (137 ± 9 ± 15) pb. We observe a structure near the (D*D̅*)^± threshold in the π^∓ recoil mass spectrum, which we denote as the Z_c ^±(4025). The measured mass and width of the structure are (4026.3 ± 2.6 ± 3.7) MeV/c² and (24.8 ± 5.6 ± 7.7) MeV, respectively. Its production ratio σ(e⁺ e⁻ → Z_c ^±(4025)π^∓ → (D*D̅*)^± π^∓ / σ(e⁺ e⁻ → ((D*D̅*)^± π^∓ is determined to be 0.65 ± 0.09 ± 0.06. The first uncertainties are statistical and the second are systematic.en©2014 American Physical SocietyAtomic massPhase space (PHSP)ArticleAblikim, M., M. N. Achasov, O. Albayrak, D. J. Ambrose, et al. 2014. "Observation of a charged charmoniumlike structure in e⁺e⁻ → (D*D̅*)^± π^ at √s=4.26 GeV." Physical Review Letters 112(13), doi:10.1103/PhysRevLett.112.13200111213