Observation of a Neutral Structure near the D(D)over-bar* Mass Threshold in e(+)e(-) -> (D(D)over-bar*)(0)pi(0) at root s=4.226 and 4.257 GeV

	*Observation of a Neutral Structure near the D(D)over-bar Mass Threshold in e(+)e(-) -> (D(D)over-bar)(0)pi(0) at root s=4.226 and 4.257 GeV*
	BESIII Collaboration
刊名	PHYSICAL REVIEW LETTERS
	2015
卷号	115 页码:222002
英文摘要	A neutral structure in the D (D) over bar* system around the D (D) over bar* mass threshold is observed with a statistical significance greater than 10 sigma in the processes e(+)e(-) -> D+D(-)pi(0) + c.c. and e(+)e(-) -> D-0(D) over bar(0)pi(0) + c.c. at root s = 4.226 and 4.257 GeV in the BESIII experiment. The structure is denoted as Z(c)(3885)(0). Assuming the presence of a resonance, its pole mass and width are determined to be [3885.7(-5.7)(+4.3) (stat) +/- 8.4(syst)] MeV/c(2) and [35(-12)(+11) (stat) +/- 15(syst)] MeV, respectively. The Born cross sections are measured to be sigma[e(+)e(-) -> Z(c)(3885)(0)pi(0); Z(c)(3885)(0) -> D (D) over bar] = [77 +/- 13(stat) +/- 17(syst)] pb at 4.226 GeV and [47 +/- 9(stat) +/- 10(syst)] pb at 4.257 GeV. The ratio of decay rates B[Z(c)(3885)(0) -> D+D(-) + c.c.]/B[Z(c)(3885)(0) -> D-0(D) over bar(0) + c.c.] is determined to be 0.96 +/- 0.18(stat) +/- 0.12(syst), consistent with no isospin violation in the process, Z(c)(3885)(0) -> D (D) over bar.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
收录类别	SCI ; EI
WOS记录号	WOS:000365524500006
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/229087]
专题	高能物理研究所_实验物理中心
推荐引用方式 GB/T 7714	BESIII Collaboration. Observation of a Neutral Structure near the D(D)over-bar* Mass Threshold in e(+)e(-) -> (D(D)over-bar*)(0)pi(0) at root s=4.226 and 4.257 GeV[J]. PHYSICAL REVIEW LETTERS,2015,115:222002.
APA	BESIII Collaboration.(2015).Observation of a Neutral Structure near the D(D)over-bar* Mass Threshold in e(+)e(-) -> (D(D)over-bar*)(0)pi(0) at root s=4.226 and 4.257 GeV.PHYSICAL REVIEW LETTERS,115,222002.
MLA	BESIII Collaboration."Observation of a Neutral Structure near the D(D)over-bar* Mass Threshold in e(+)e(-) -> (D(D)over-bar*)(0)pi(0) at root s=4.226 and 4.257 GeV".PHYSICAL REVIEW LETTERS 115(2015):222002.