Observation of e+e- →π+π-ψ (3770) and D1 (2420)0 D ̄ 0+ c. c. OBSERVATION of e+e- →π+π-ψ (3770) and D1 (2420)0 D ̄ 0+ c. c. M. ABLIKIM et al.

(BESIII Collaboration)

Research output: Contribution to journalArticle

Abstract

Several intermediate states of the reaction channels e+e-→π+π-D0D̄0 and e+e-→π+π-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 ψ(3770) signal is seen in the DD̄ invariant mass spectrum, with a statistical significance of 5.2σ at s=4.42 GeV. There is also evidence for this resonance at s=4.26 and 4.36 GeV with statistical significance of 3.2σ and 3.3σ, respectively. In addition, the Born cross section of e+e-→π+π-ψ(3770) is measured. The proposed heavy-quark-spin-symmetry partner of the X(3872), the state X2(4013), is also searched for in the DD̄ invariant mass spectra. No obvious signal is found. The upper limit of the Born cross section of the process e+e-→ρ0X2(4013) combined with the branching fraction is measured. Also, the processes e+e-→D1(2420)D̄+c.c. are investigated. The neutral mode with D1(2420)0→D0π+π- is reported with statistical significance of 7.4σ at s=4.42 GeV for the first time, and evidence with statistical significance of 3.2σ and 3.3σ at s=4.36 and 4.60 GeV is seen, respectively. No evident signal for the process e+e-→D1(2420)0D̄0+c.c.,D1(2420)0→D∗+π- is reported. Evidence for e+e-→D1(2420)+D-+c.c.,D1(2420)+→D+π+π- is reported with statistical significance of 3.1σ and 3.0σ at s=4.36 and 4.42 GeV, respectively.

Original languageEnglish (US)
Article number032005
JournalPhysical Review D
Volume100
Issue number3
DOIs
StatePublished - Aug 13 2019

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mass spectra
cross sections
center of mass
quarks
detectors
symmetry
energy

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Observation of e+e- →π+π-ψ (3770) and D1 (2420)0 D ̄ 0+ c. c. OBSERVATION of e+e- →π+π-ψ (3770) and D1 (2420)0 D ̄ 0+ c. c. M. ABLIKIM et al. / (BESIII Collaboration).

In: Physical Review D, Vol. 100, No. 3, 032005, 13.08.2019.

Research output: Contribution to journalArticle

@article{0321805ad33040a69fc8413bb486d51c,
title = "Observation of e+e- →π+π-ψ (3770) and D1 (2420)0 D ̄ 0+ c. c. OBSERVATION of e+e- →π+π-ψ (3770) and D1 (2420)0 D ̄ 0+ c. c. M. ABLIKIM et al.",
abstract = "Several intermediate states of the reaction channels e+e-→π+π-D0D̄0 and e+e-→π+π-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 ψ(3770) signal is seen in the DD̄ invariant mass spectrum, with a statistical significance of 5.2σ at s=4.42 GeV. There is also evidence for this resonance at s=4.26 and 4.36 GeV with statistical significance of 3.2σ and 3.3σ, respectively. In addition, the Born cross section of e+e-→π+π-ψ(3770) is measured. The proposed heavy-quark-spin-symmetry partner of the X(3872), the state X2(4013), is also searched for in the DD̄ invariant mass spectra. No obvious signal is found. The upper limit of the Born cross section of the process e+e-→ρ0X2(4013) combined with the branching fraction is measured. Also, the processes e+e-→D1(2420)D̄+c.c. are investigated. The neutral mode with D1(2420)0→D0π+π- is reported with statistical significance of 7.4σ at s=4.42 GeV for the first time, and evidence with statistical significance of 3.2σ and 3.3σ at s=4.36 and 4.60 GeV is seen, respectively. No evident signal for the process e+e-→D1(2420)0D̄0+c.c.,D1(2420)0→D∗+π- is reported. Evidence for e+e-→D1(2420)+D-+c.c.,D1(2420)+→D+π+π- is reported with statistical significance of 3.1σ and 3.0σ at s=4.36 and 4.42 GeV, respectively.",
author = "{(BESIII Collaboration)} and M. Ablikim and Achasov, {M. N.} and P. Adlarson and S. Ahmed and M. Albrecht and M. Alekseev and A. Amoroso and An, {F. F.} and Q. An and Y. Bai and O. Bakina and {Baldini Ferroli}, R. and {Balossino Balossino}, I. and Y. Ban and K. Begzsuren and Bennett, {J. V.} and N. Berger and M. Bertani and D. Bettoni and F. Bianchi and J. Biernat and J. Bloms and I. Boyko and Briere, {R. A.} and H. Cai and X. Cai and A. Calcaterra and Cao, {G. F.} and N. Cao and Cetin, {S. A.} and J. Chai and Chang, {J. F.} and Chang, {W. L.} and G. Chelkov and Chen, {D. Y.} and G. Chen and Chen, {H. S.} and Chen, {J. C.} and Chen, {M. L.} and Chen, {S. J.} and Chen, {Y. B.} and W. Cheng and G. Cibinetto and F. Cossio and Cui, {X. F.} and Dai, {H. L.} and Dai, {J. P.} and Dai, {X. C.} and A. Dbeyssi and D. Dedovich",
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TY - JOUR

T1 - Observation of e+e- →π+π-ψ (3770) and D1 (2420)0 D ̄ 0+ c. c. OBSERVATION of e+e- →π+π-ψ (3770) and D1 (2420)0 D ̄ 0+ c. c. M. ABLIKIM et al.

AU - (BESIII Collaboration)

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Adlarson, P.

AU - Ahmed, S.

AU - Albrecht, M.

AU - Alekseev, M.

AU - Amoroso, A.

AU - An, F. F.

AU - An, Q.

AU - Bai, Y.

AU - Bakina, O.

AU - Baldini Ferroli, R.

AU - Balossino Balossino, I.

AU - Ban, Y.

AU - Begzsuren, K.

AU - Bennett, J. V.

AU - Berger, N.

AU - Bertani, M.

AU - Bettoni, D.

AU - Bianchi, F.

AU - Biernat, J.

AU - Bloms, J.

AU - Boyko, I.

AU - Briere, R. A.

AU - Cai, H.

AU - Cai, X.

AU - Calcaterra, A.

AU - Cao, G. F.

AU - Cao, N.

AU - Cetin, S. A.

AU - Chai, J.

AU - Chang, J. F.

AU - Chang, W. L.

AU - Chelkov, G.

AU - Chen, D. Y.

AU - Chen, G.

AU - Chen, H. S.

AU - Chen, J. C.

AU - Chen, M. L.

AU - Chen, S. J.

AU - Chen, Y. B.

AU - Cheng, W.

AU - Cibinetto, G.

AU - Cossio, F.

AU - Cui, X. F.

AU - Dai, H. L.

AU - Dai, J. P.

AU - Dai, X. C.

AU - Dbeyssi, A.

AU - Dedovich, D.

PY - 2019/8/13

Y1 - 2019/8/13

N2 - Several intermediate states of the reaction channels e+e-→π+π-D0D̄0 and e+e-→π+π-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 ψ(3770) signal is seen in the DD̄ invariant mass spectrum, with a statistical significance of 5.2σ at s=4.42 GeV. There is also evidence for this resonance at s=4.26 and 4.36 GeV with statistical significance of 3.2σ and 3.3σ, respectively. In addition, the Born cross section of e+e-→π+π-ψ(3770) is measured. The proposed heavy-quark-spin-symmetry partner of the X(3872), the state X2(4013), is also searched for in the DD̄ invariant mass spectra. No obvious signal is found. The upper limit of the Born cross section of the process e+e-→ρ0X2(4013) combined with the branching fraction is measured. Also, the processes e+e-→D1(2420)D̄+c.c. are investigated. The neutral mode with D1(2420)0→D0π+π- is reported with statistical significance of 7.4σ at s=4.42 GeV for the first time, and evidence with statistical significance of 3.2σ and 3.3σ at s=4.36 and 4.60 GeV is seen, respectively. No evident signal for the process e+e-→D1(2420)0D̄0+c.c.,D1(2420)0→D∗+π- is reported. Evidence for e+e-→D1(2420)+D-+c.c.,D1(2420)+→D+π+π- is reported with statistical significance of 3.1σ and 3.0σ at s=4.36 and 4.42 GeV, respectively.

AB - Several intermediate states of the reaction channels e+e-→π+π-D0D̄0 and e+e-→π+π-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 ψ(3770) signal is seen in the DD̄ invariant mass spectrum, with a statistical significance of 5.2σ at s=4.42 GeV. There is also evidence for this resonance at s=4.26 and 4.36 GeV with statistical significance of 3.2σ and 3.3σ, respectively. In addition, the Born cross section of e+e-→π+π-ψ(3770) is measured. The proposed heavy-quark-spin-symmetry partner of the X(3872), the state X2(4013), is also searched for in the DD̄ invariant mass spectra. No obvious signal is found. The upper limit of the Born cross section of the process e+e-→ρ0X2(4013) combined with the branching fraction is measured. Also, the processes e+e-→D1(2420)D̄+c.c. are investigated. The neutral mode with D1(2420)0→D0π+π- is reported with statistical significance of 7.4σ at s=4.42 GeV for the first time, and evidence with statistical significance of 3.2σ and 3.3σ at s=4.36 and 4.60 GeV is seen, respectively. No evident signal for the process e+e-→D1(2420)0D̄0+c.c.,D1(2420)0→D∗+π- is reported. Evidence for e+e-→D1(2420)+D-+c.c.,D1(2420)+→D+π+π- is reported with statistical significance of 3.1σ and 3.0σ at s=4.36 and 4.42 GeV, respectively.

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U2 - 10.1103/PhysRevD.100.032005

DO - 10.1103/PhysRevD.100.032005

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JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

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