Measurement of e+e- → π+π- φ (3686) from 4.008 to 4.600 GeV and observation of a charged structure in the π± φ(3686) mass spectrum

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Measurement of e⁺e^- → π⁺π^- φ (3686) from 4.008 to 4.600 GeV and observation of a charged structure in the π^± φ(3686) mass spectrum. / BESIII Collaboration.

In: Physical Review D, Vol. 96, No. 3, 032004, 31.08.2017.

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

BibTeX

@article{b6a749ca99224db4814151e33079eb7e,

title = "Measurement of e+e- → π+π- φ (3686) from 4.008 to 4.600 GeV and observation of a charged structure in the π± φ(3686) mass spectrum",

abstract = "We study the process e+e- → π+π- φ (3686) using 5.1 fb-1 of data collected at 16 center-of-mass energy (√s) points from 4.008 to 4.600 GeV by the BESIII detector operating at the BEPCII collider. The measured Born cross sections for e+e- → π+π- φ(3686) are consistent with previous results, but with much improved precision. A fit to the cross section shows contributions from two structures: the first has M = 4209.5 ± 7.4 ±1.4 MeV=c2 and Λ = 80.1 ± 24.6 ± 2.9 MeV, and the second has M = 4383.8 ± 4.2 ± 0.8 MeV=c2 and F = 84.2 ± 12.5 ±2.1 MeV, where the first errors are statistical and the second systematic. The lower-mass resonance is observed in the process e+e- → π+π- φ(3686) for the first time with a statistical significance of 5.8σ. A charged charmoniumlike structure is observed in the π± φ(3686) invariant mass spectrum for data at √s = 4.416 GeV. A fit with an S-wave Breit-Wigner function yields a mass M = 4032.1 ± 2.4 MeV=c2, where the errors are statistical only. However, there are still unresolved discrepancies between the fit model and data. The width of the intermediate state varies in a wide range for different kinematic regions within the data set. Therefore, no simple interpretation of the data has been found, and a future data sample with larger statistics and more theoretical input will be required to better understand this issue.",

keywords = "PI-PI, RADIATIVE-CORRECTIONS, CHARMONIUM",

author = "{BESIII Collaboration} and M. Ablikim and Achasov, {M. N.} and S. Ahmed and Ai, {X. C.} and O. Albayrak and M. Albrecht and Ambrose, {D. J.} and A. Amoroso and An, {F. F.} and Q. An and Bai, {J. Z.} and O. Bakina and {Baldini Ferroli}, R. and Y. Ban and Bennett, {D. W.} and Bennett, {J. V.} and N. Berger and M. Bertani and D. Bettoni and Bian, {J. M.} and F. Bianchi and E. Boger and I. Boyko and Briere, {R. A.} and H. Cai and X. Cai and O. Cakir and A. Calcaterra and Cao, {G. F.} and Cetin, {S. A.} and J. Chai and Chang, {J. F.} and G. Chelkov and G. Chen and Chen, {H. S.} and Chen, {J. C.} and Chen, {M. L.} and S. Chen and Chen, {S. J.} and X. Chen and Chen, {X. R.} and Chen, {Y. B.} and Chu, {X. K.} and G. Cibinetto and Dai, {H. L.} and Dai, {J. P.} and A. Dbeyssi and D. Dedovich and Muchnoi, {N. Yu} and Nikolaev, {I. B.}",

year = "2017",

month = aug,

day = "31",

doi = "10.1103/PhysRevD.96.032004",

language = "English",

volume = "96",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "AMER PHYSICAL SOC",

number = "3",

}

RIS

TY - JOUR

T1 - Measurement of e+e- → π+π- φ (3686) from 4.008 to 4.600 GeV and observation of a charged structure in the π± φ(3686) mass spectrum

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Ahmed, S.

AU - Ai, X. C.

AU - Albayrak, O.

AU - Albrecht, M.

AU - Ambrose, D. J.

AU - Amoroso, A.

AU - An, F. F.

AU - An, Q.

AU - Bai, J. Z.

AU - Bakina, O.

AU - Baldini Ferroli, R.

AU - Ban, Y.

AU - Bennett, D. W.

AU - Bennett, J. V.

AU - Berger, N.

AU - Bertani, M.

AU - Bettoni, D.

AU - Bian, J. M.

AU - Bianchi, F.

AU - Boger, E.

AU - Boyko, I.

AU - Briere, R. A.

AU - Cai, H.

AU - Cai, X.

AU - Cakir, O.

AU - Calcaterra, A.

AU - Cao, G. F.

AU - Cetin, S. A.

AU - Chai, J.

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.

AU - Chen, S. J.

AU - Chen, X.

AU - Chen, X. R.

AU - Chen, Y. B.

AU - Chu, X. K.

AU - Cibinetto, G.

AU - Dai, H. L.

AU - Dai, J. P.

AU - Dbeyssi, A.

AU - Dedovich, D.

AU - Muchnoi, N. Yu

AU - Nikolaev, I. B.

PY - 2017/8/31

Y1 - 2017/8/31

N2 - We study the process e+e- → π+π- φ (3686) using 5.1 fb-1 of data collected at 16 center-of-mass energy (√s) points from 4.008 to 4.600 GeV by the BESIII detector operating at the BEPCII collider. The measured Born cross sections for e+e- → π+π- φ(3686) are consistent with previous results, but with much improved precision. A fit to the cross section shows contributions from two structures: the first has M = 4209.5 ± 7.4 ±1.4 MeV=c2 and Λ = 80.1 ± 24.6 ± 2.9 MeV, and the second has M = 4383.8 ± 4.2 ± 0.8 MeV=c2 and F = 84.2 ± 12.5 ±2.1 MeV, where the first errors are statistical and the second systematic. The lower-mass resonance is observed in the process e+e- → π+π- φ(3686) for the first time with a statistical significance of 5.8σ. A charged charmoniumlike structure is observed in the π± φ(3686) invariant mass spectrum for data at √s = 4.416 GeV. A fit with an S-wave Breit-Wigner function yields a mass M = 4032.1 ± 2.4 MeV=c2, where the errors are statistical only. However, there are still unresolved discrepancies between the fit model and data. The width of the intermediate state varies in a wide range for different kinematic regions within the data set. Therefore, no simple interpretation of the data has been found, and a future data sample with larger statistics and more theoretical input will be required to better understand this issue.

AB - We study the process e+e- → π+π- φ (3686) using 5.1 fb-1 of data collected at 16 center-of-mass energy (√s) points from 4.008 to 4.600 GeV by the BESIII detector operating at the BEPCII collider. The measured Born cross sections for e+e- → π+π- φ(3686) are consistent with previous results, but with much improved precision. A fit to the cross section shows contributions from two structures: the first has M = 4209.5 ± 7.4 ±1.4 MeV=c2 and Λ = 80.1 ± 24.6 ± 2.9 MeV, and the second has M = 4383.8 ± 4.2 ± 0.8 MeV=c2 and F = 84.2 ± 12.5 ±2.1 MeV, where the first errors are statistical and the second systematic. The lower-mass resonance is observed in the process e+e- → π+π- φ(3686) for the first time with a statistical significance of 5.8σ. A charged charmoniumlike structure is observed in the π± φ(3686) invariant mass spectrum for data at √s = 4.416 GeV. A fit with an S-wave Breit-Wigner function yields a mass M = 4032.1 ± 2.4 MeV=c2, where the errors are statistical only. However, there are still unresolved discrepancies between the fit model and data. The width of the intermediate state varies in a wide range for different kinematic regions within the data set. Therefore, no simple interpretation of the data has been found, and a future data sample with larger statistics and more theoretical input will be required to better understand this issue.

KW - PI-PI

KW - RADIATIVE-CORRECTIONS

KW - CHARMONIUM

UR - http://www.scopus.com/inward/record.url?scp=85042325503&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.96.032004

DO - 10.1103/PhysRevD.96.032004

M3 - Article

AN - SCOPUS:85042325503

VL - 96

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 3

M1 - 032004

ER -

ID: 13333755