Observation of e(+)e(-) -> pi(+) pi(-)psi(3770) and D-1(2420)(0)(D)over-bar(0) + c.cShow others and affiliations
Number of Authors: 4792019 (English)In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 100, no 3, article id 032005Article in journal (Refereed) Published
Abstract [en]
Several intermediate states of the reaction channels e(+)e(-) -> pi(+)pi(-) D-0(D) over bar (0) and e(+)e(-) -> pi(+)pi-D+D- are studied using the data samples collected with the BESIII detector at center-of-mass energies above 4.08 GeV. For the first time in this final state, a psi(3770) signal is seen in the DD invariant mass spectrum, with a statistical significance of 5.2 sigma at root s = 4.42 GeV. There is also evidence for this resonance at root s = 4.26 and 4.36 GeV with statistical significance of 3.2 sigma and 3.3 sigma, respectively. In addition, the Born cross section of e(+)e(-) ->pi(+)pi(-)psi(3770) is measured. The proposed heavy-quark-spin-symmetry partner of the X(3872), the state X-2(4013), is also searched for in the D (D) over bar invariant mass spectra. No obvious signal is found. The upper limit of the Born cross section of the process e(+)e(-) -> rho X-0(2)(4013) combined with the branching fraction is measured. Also, the processes e(+)e(-) -> D-1(2420)(D) over bar c.c. are investigated. The neutral mode with D-1(2420)(0) -> D-0 pi(+)pi(-) is reported with statistical significance of 7.4 sigma at root s = 4.42 GeV for the first time, and evidence with statistical significance of 3.2 sigma and 3.3 sigma at root s = 4.36 and 4.60 GeV is seen, respectively. No evident signal for the process e(+)e(-) -> D-1(2420)(0)(D) over bar (0) + c.c., D-1(2420)(0) -> D*(+)pi(-) is reported. Evidence for e(+)e(-) -> D-1(2420)+D- + c.c., D-1(2420)(+) -> D+pi(+)pi(-) is reported with statistical significance of 3.1 sigma and 3.0 sigma at root s. = 4.36 and 4.42 GeV, respectively.
Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2019. Vol. 100, no 3, article id 032005
National Category
Subatomic Physics Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:uu:diva-393660DOI: 10.1103/PhysRevD.100.032005ISI: 000480609000001OAI: oai:DiVA.org:uu-393660DiVA, id: diva2:1354763
Funder
Knut and Alice Wallenberg Foundation, 2016.0157Swedish Research Council
Note
For complete list of authors see http://dx.doi.org/10.1103/PhysRevD.100.032005
2019-09-262019-09-262019-09-26Bibliographically approved