Observation of a charged (DD∗)± Mass Peak in e+e- → πdD ∗ at √s=4.26 GeV

M. Ablikim; M. N. Achasov; O. Albayrak; D. J. Ambrose; F. F. An; Q. An; J. Z. Bai; R. Baldini Ferroli; Y. Ban; J. Becker; J. V. Bennett; M. Bertani; J. M. Bian; E. Boger; O. Bondarenko; I. Boyko; S. Braun; R. A. Briere; V. Bytev; H. Cai; X. Cai; O. Cakir; A. Calcaterra; G. F. Cao; S. A. Cetin; J. F. Chang; G. Chelkov; G. Chen; H. S. Chen; J. C. Chen; M. L. Chen; S. J. Chen; X. R. Chen; Y. B. Chen; H. P. Cheng; X. K. Chu; Y. P. Chu; D. Cronin-Hennessy; H. L. Dai; J. P. Dai; D. Dedovich; Z. Y. Deng; A. Denig; I. Denysenko; M. Destefanis; W. M. Ding; Y. Ding; L. Y. Dong; H. Muramatsu; R. Poling; BESIII Collaboration

doi:10.1103/PhysRevLett.112.022001

Observation of a charged (DD∗)± Mass Peak in e⁺e^- → πdD ∗ at √s=4.26 GeV

M. Ablikim, M. N. Achasov, O. Albayrak, D. J. Ambrose, F. F. An, Q. An, J. Z. Bai, R. Baldini Ferroli, Y. Ban, J. Becker, J. V. Bennett, M. Bertani, J. M. Bian, E. Boger, O. Bondarenko, I. Boyko, S. Braun, R. A. Briere, V. Bytev, H. CaiX. Cai, O. Cakir, A. Calcaterra, G. F. Cao, S. A. Cetin, J. F. Chang, G. Chelkov, G. Chen, H. S. Chen, J. C. Chen, M. L. Chen, S. J. Chen, X. R. Chen, Y. B. Chen, H. P. Cheng, X. K. Chu, Y. P. Chu, D. Cronin-Hennessy, H. L. Dai, J. P. Dai, D. Dedovich, Z. Y. Deng, A. Denig, I. Denysenko, M. Destefanis, W. M. Ding, Y. Ding, L. Y. Dong, H. Muramatsu, R. Poling, BESIII Collaboration

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

286 Scopus citations

Abstract

We report on a study of the process e+e-→π±(DD̄*) - at s=4.26 GeV using a 525 pb-1 data sample collected with the BESIII detector at the BEPCII storage ring. A distinct charged structure is observed in the (DD̄*)- invariant mass distribution. When fitted to a mass-dependent-width Breit-Wigner line shape, the pole mass and width are determined to be Mpole=(3883.9±1.5(stat)±4.2(syst)) MeV/c2 and Γpole=(24.8±3.3(stat)±11.0(syst)) MeV. The mass and width of the structure, which we refer to as Zc(3885), are 2σ and 1σ, respectively, below those of the Zc(3900)→π±J/ψ peak observed by BESIII and Belle in π+π-J/ψ final states produced at the same center-of-mass energy. The angular distribution of the πZc(3885) system favors a JP=1+ quantum number assignment for the structure and disfavors 1- or 0-. The Born cross section times the DD̄* branching fraction of the Zc(3885) is measured to be σ(e+e-→π±Zc(3885)-) ×B(Zc(3885)- →(DD̄*)-)=(83.5±6.6(stat)±22. 0(syst)) pb. Assuming the Zc(3885)→DD̄* signal reported here and the Zc(3900)→πJ/ψ signal are from the same source, the partial width ratio (Γ(Zc(3885)→DD̄*)/Γ(Zc(3900)→πJ/ ψ))=6.2±1.1(stat)±2.7(syst) is determined.

Original language	English (US)
Article number	022001
Journal	Physical review letters
Volume	112
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.112.022001
State	Published - Jan 15 2014

Bibliographical note

Funding Information:
The BESIII collaboration thanks the staff of BEPCII and the computing center for their strong support. This work is supported in part by the Ministry of Science and Technology of China Contract No. 2009CB825200; National Natural Science Foundation of China (NSFC) Contracts No. 10821063, No. 10825524, No. 10835001, No. 10935007, No. 11125525, No. 11235011; Joint Funds of the National Natural Science Foundation of China under Contracts No. 11079008, No. 11179007, No. 11079027; Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; CAS Contracts No. KJCX2-YW-N29, No. KJCX2-YW-N45; 100 Talents Program of CAS; German Research Foundation (DFG) Collaborative Research Center Contract No. CRC-1044; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey Contract No. DPT2006K-120470; U.S. Department of Energy Contracts No. DE-FG02-04ER41291, No. DE-FG02-05ER41374, No. DE-FG02-94ER40823; U.S. National Science Foundation; University of Groningen (RuG); Helmholtzzentrum für Schwerionenforschung GmbH (GSI) Darmstadt; Korean National Research Foundation (NRF) Grant No. 20110029457.

Publisher Copyright:
© 2014 American Physical Society.

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10.1103/PhysRevLett.112.022001

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Ablikim, M., Achasov, M. N., Albayrak, O., Ambrose, D. J., An, F. F., An, Q., Bai, J. Z., Baldini Ferroli, R., Ban, Y., Becker, J., Bennett, J. V., Bertani, M., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Braun, S., Briere, R. A., Bytev, V., ... BESIII Collaboration (2014). Observation of a charged (DD∗)± Mass Peak in e⁺e^- → πdD ∗ at √s=4.26 GeV. Physical review letters, 112(2), [022001]. https://doi.org/10.1103/PhysRevLett.112.022001

Ablikim, M, Achasov, MN, Albayrak, O, Ambrose, DJ, An, FF, An, Q, Bai, JZ, Baldini Ferroli, R, Ban, Y, Becker, J, Bennett, JV, Bertani, M, Bian, JM, Boger, E, Bondarenko, O, Boyko, I, Braun, S, Briere, RA, Bytev, V, Cai, H, Cai, X, Cakir, O, Calcaterra, A, Cao, GF, Cetin, SA, Chang, JF, Chelkov, G, Chen, G, Chen, HS, Chen, JC, Chen, ML, Chen, SJ, Chen, XR, Chen, YB, Cheng, HP, Chu, XK, Chu, YP, Cronin-Hennessy, D, Dai, HL, Dai, JP, Dedovich, D, Deng, ZY, Denig, A, Denysenko, I, Destefanis, M, Ding, WM, Ding, Y, Dong, LY, Muramatsu, H, Poling, R & BESIII Collaboration 2014, 'Observation of a charged (DD∗)± Mass Peak in e⁺e^- → πdD ∗ at √s=4.26 GeV', Physical review letters, vol. 112, no. 2, 022001. https://doi.org/10.1103/PhysRevLett.112.022001

@article{394930d1e9a94121ae6069db02abb5d2,

title = "Observation of a charged (DD∗)± Mass Peak in e+e- → πdD ∗ at √s=4.26 GeV",

abstract = "We report on a study of the process e+e-→π±(D{\=D}*) - at s=4.26 GeV using a 525 pb-1 data sample collected with the BESIII detector at the BEPCII storage ring. A distinct charged structure is observed in the (D{\=D}*)- invariant mass distribution. When fitted to a mass-dependent-width Breit-Wigner line shape, the pole mass and width are determined to be Mpole=(3883.9±1.5(stat)±4.2(syst)) MeV/c2 and Γpole=(24.8±3.3(stat)±11.0(syst)) MeV. The mass and width of the structure, which we refer to as Zc(3885), are 2σ and 1σ, respectively, below those of the Zc(3900)→π±J/ψ peak observed by BESIII and Belle in π+π-J/ψ final states produced at the same center-of-mass energy. The angular distribution of the πZc(3885) system favors a JP=1+ quantum number assignment for the structure and disfavors 1- or 0-. The Born cross section times the D{\=D}* branching fraction of the Zc(3885) is measured to be σ(e+e-→π±Zc(3885)-) ×B(Zc(3885)- →(D{\=D}*)-)=(83.5±6.6(stat)±22. 0(syst)) pb. Assuming the Zc(3885)→D{\=D}* signal reported here and the Zc(3900)→πJ/ψ signal are from the same source, the partial width ratio (Γ(Zc(3885)→D{\=D}*)/Γ(Zc(3900)→πJ/ ψ))=6.2±1.1(stat)±2.7(syst) is determined.",

author = "M. Ablikim and Achasov, {M. N.} and O. Albayrak and Ambrose, {D. J.} and An, {F. F.} and Q. An and Bai, {J. Z.} and {Baldini Ferroli}, R. and Y. Ban and J. Becker and Bennett, {J. V.} and M. Bertani and Bian, {J. M.} and E. Boger and O. Bondarenko and I. Boyko and S. Braun and Briere, {R. A.} and V. Bytev and H. Cai and X. Cai and O. Cakir and A. Calcaterra and Cao, {G. F.} and Cetin, {S. A.} and Chang, {J. F.} and G. Chelkov and G. Chen and Chen, {H. S.} and Chen, {J. C.} and Chen, {M. L.} and Chen, {S. J.} and Chen, {X. R.} and Chen, {Y. B.} and Cheng, {H. P.} and Chu, {X. K.} and Chu, {Y. P.} and D. Cronin-Hennessy and Dai, {H. L.} and Dai, {J. P.} and D. Dedovich and Deng, {Z. Y.} and A. Denig and I. Denysenko and M. Destefanis and Ding, {W. M.} and Y. Ding and Dong, {L. Y.} and H. Muramatsu and R. Poling and {BESIII Collaboration}",

note = "Funding Information: The BESIII collaboration thanks the staff of BEPCII and the computing center for their strong support. This work is supported in part by the Ministry of Science and Technology of China Contract No. 2009CB825200; National Natural Science Foundation of China (NSFC) Contracts No. 10821063, No. 10825524, No. 10835001, No. 10935007, No. 11125525, No. 11235011; Joint Funds of the National Natural Science Foundation of China under Contracts No. 11079008, No. 11179007, No. 11079027; Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; CAS Contracts No. KJCX2-YW-N29, No. KJCX2-YW-N45; 100 Talents Program of CAS; German Research Foundation (DFG) Collaborative Research Center Contract No. CRC-1044; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey Contract No. DPT2006K-120470; U.S. Department of Energy Contracts No. DE-FG02-04ER41291, No. DE-FG02-05ER41374, No. DE-FG02-94ER40823; U.S. National Science Foundation; University of Groningen (RuG); Helmholtzzentrum f{\"u}r Schwerionenforschung GmbH (GSI) Darmstadt; Korean National Research Foundation (NRF) Grant No. 20110029457. Publisher Copyright: {\textcopyright} 2014 American Physical Society.",

year = "2014",

month = jan,

day = "15",

doi = "10.1103/PhysRevLett.112.022001",

language = "English (US)",

volume = "112",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "2",

}

TY - JOUR

T1 - Observation of a charged (DD∗)± Mass Peak in e+e- → πdD ∗ at √s=4.26 GeV

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Albayrak, O.

AU - Ambrose, D. J.

AU - An, F. F.

AU - An, Q.

AU - Bai, J. Z.

AU - Baldini Ferroli, R.

AU - Ban, Y.

AU - Becker, J.

AU - Bennett, J. V.

AU - Bertani, M.

AU - Bian, J. M.

AU - Boger, E.

AU - Bondarenko, O.

AU - Boyko, I.

AU - Braun, S.

AU - Briere, R. A.

AU - Bytev, V.

AU - Cai, H.

AU - Cai, X.

AU - Cakir, O.

AU - Calcaterra, A.

AU - Cao, G. F.

AU - Cetin, S. A.

AU - Chang, J. F.

AU - Chelkov, G.

AU - Chen, G.

AU - Chen, H. S.

AU - Chen, J. C.

AU - Chen, M. L.

AU - Chen, S. J.

AU - Chen, X. R.

AU - Chen, Y. B.

AU - Cheng, H. P.

AU - Chu, X. K.

AU - Chu, Y. P.

AU - Cronin-Hennessy, D.

AU - Dai, H. L.

AU - Dai, J. P.

AU - Dedovich, D.

AU - Deng, Z. Y.

AU - Denig, A.

AU - Denysenko, I.

AU - Destefanis, M.

AU - Ding, W. M.

AU - Ding, Y.

AU - Dong, L. Y.

AU - Muramatsu, H.

AU - Poling, R.

AU - BESIII Collaboration

N1 - Funding Information: The BESIII collaboration thanks the staff of BEPCII and the computing center for their strong support. This work is supported in part by the Ministry of Science and Technology of China Contract No. 2009CB825200; National Natural Science Foundation of China (NSFC) Contracts No. 10821063, No. 10825524, No. 10835001, No. 10935007, No. 11125525, No. 11235011; Joint Funds of the National Natural Science Foundation of China under Contracts No. 11079008, No. 11179007, No. 11079027; Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; CAS Contracts No. KJCX2-YW-N29, No. KJCX2-YW-N45; 100 Talents Program of CAS; German Research Foundation (DFG) Collaborative Research Center Contract No. CRC-1044; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey Contract No. DPT2006K-120470; U.S. Department of Energy Contracts No. DE-FG02-04ER41291, No. DE-FG02-05ER41374, No. DE-FG02-94ER40823; U.S. National Science Foundation; University of Groningen (RuG); Helmholtzzentrum für Schwerionenforschung GmbH (GSI) Darmstadt; Korean National Research Foundation (NRF) Grant No. 20110029457. Publisher Copyright: © 2014 American Physical Society.

PY - 2014/1/15

Y1 - 2014/1/15

N2 - We report on a study of the process e+e-→π±(DD̄*) - at s=4.26 GeV using a 525 pb-1 data sample collected with the BESIII detector at the BEPCII storage ring. A distinct charged structure is observed in the (DD̄*)- invariant mass distribution. When fitted to a mass-dependent-width Breit-Wigner line shape, the pole mass and width are determined to be Mpole=(3883.9±1.5(stat)±4.2(syst)) MeV/c2 and Γpole=(24.8±3.3(stat)±11.0(syst)) MeV. The mass and width of the structure, which we refer to as Zc(3885), are 2σ and 1σ, respectively, below those of the Zc(3900)→π±J/ψ peak observed by BESIII and Belle in π+π-J/ψ final states produced at the same center-of-mass energy. The angular distribution of the πZc(3885) system favors a JP=1+ quantum number assignment for the structure and disfavors 1- or 0-. The Born cross section times the DD̄* branching fraction of the Zc(3885) is measured to be σ(e+e-→π±Zc(3885)-) ×B(Zc(3885)- →(DD̄*)-)=(83.5±6.6(stat)±22. 0(syst)) pb. Assuming the Zc(3885)→DD̄* signal reported here and the Zc(3900)→πJ/ψ signal are from the same source, the partial width ratio (Γ(Zc(3885)→DD̄*)/Γ(Zc(3900)→πJ/ ψ))=6.2±1.1(stat)±2.7(syst) is determined.

AB - We report on a study of the process e+e-→π±(DD̄*) - at s=4.26 GeV using a 525 pb-1 data sample collected with the BESIII detector at the BEPCII storage ring. A distinct charged structure is observed in the (DD̄*)- invariant mass distribution. When fitted to a mass-dependent-width Breit-Wigner line shape, the pole mass and width are determined to be Mpole=(3883.9±1.5(stat)±4.2(syst)) MeV/c2 and Γpole=(24.8±3.3(stat)±11.0(syst)) MeV. The mass and width of the structure, which we refer to as Zc(3885), are 2σ and 1σ, respectively, below those of the Zc(3900)→π±J/ψ peak observed by BESIII and Belle in π+π-J/ψ final states produced at the same center-of-mass energy. The angular distribution of the πZc(3885) system favors a JP=1+ quantum number assignment for the structure and disfavors 1- or 0-. The Born cross section times the DD̄* branching fraction of the Zc(3885) is measured to be σ(e+e-→π±Zc(3885)-) ×B(Zc(3885)- →(DD̄*)-)=(83.5±6.6(stat)±22. 0(syst)) pb. Assuming the Zc(3885)→DD̄* signal reported here and the Zc(3900)→πJ/ψ signal are from the same source, the partial width ratio (Γ(Zc(3885)→DD̄*)/Γ(Zc(3900)→πJ/ ψ))=6.2±1.1(stat)±2.7(syst) is determined.

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U2 - 10.1103/PhysRevLett.112.022001

DO - 10.1103/PhysRevLett.112.022001

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