Observation of the χc2(2P) meson in the reaction γγ→ DD̄ at BABAR

BABAR Collaboration

doi:10.1103/PhysRevD.81.092003

Observation of the χc2(2P) meson in the reaction γγ→ DD̄ at BABAR

BABAR Collaboration

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

121 Scopus citations

Abstract

A search for the Z(3930) resonance in γγ production of the DD̄ system has been performed using a data sample corresponding to an integrated luminosity of 384fb^-1 recorded by the BABAR experiment at the PEP-II asymmetric-energy electron-positron collider. The DD̄ invariant mass distribution shows clear evidence of the Z(3930) state with a significance of 5.8σ. We determine mass and width values of (3926.7±2. 7±1.1)MeV/c2 and (21.3±6.8±3.6)MeV, respectively. A decay angular analysis provides evidence that the Z(3930) is a tensor state with positive parity and C parity (JPC=2⁺⁺); therefore we identify the Z(3930) state as the χc2(2P) meson. The value of the partial width Γγγ×B(Z(3930)→DD̄) is found to be (0.24±0.05±0.04)keV.

Original language	English
Article number	092003
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	81
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevD.81.092003
State	Published - 19 May 2010
Externally published	Yes

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10.1103/PhysRevD.81.092003

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@article{b108b62608164d4db6a9f04832d76810,

title = "Observation of the χc2(2P) meson in the reaction γγ→ D{\=D} at BABAR",

abstract = "A search for the Z(3930) resonance in γγ production of the D{\=D} system has been performed using a data sample corresponding to an integrated luminosity of 384fb-1 recorded by the BABAR experiment at the PEP-II asymmetric-energy electron-positron collider. The D{\=D} invariant mass distribution shows clear evidence of the Z(3930) state with a significance of 5.8σ. We determine mass and width values of (3926.7±2. 7±1.1)MeV/c2 and (21.3±6.8±3.6)MeV, respectively. A decay angular analysis provides evidence that the Z(3930) is a tensor state with positive parity and C parity (JPC=2++); therefore we identify the Z(3930) state as the χc2(2P) meson. The value of the partial width Γγγ×B(Z(3930)→D{\=D}) is found to be (0.24±0.05±0.04)keV.",

author = "\{BABAR Collaboration\} and B. Aubert and Y. Karyotakis and Lees, \{J. P.\} and V. Poireau and E. Prencipe and X. Prudent and V. Tisserand and \{Garra Tico\}, J. and E. Grauges and M. Martinelli and A. Palano and M. Pappagallo and G. Eigen and B. Stugu and L. Sun and M. Battaglia and Brown, \{D. N.\} and B. Hooberman and Kerth, \{L. T.\} and Kolomensky, \{Yu G.\} and G. Lynch and Osipenkov, \{I. L.\} and K. Tackmann and T. Tanabe and Hawkes, \{C. M.\} and N. Soni and Watson, \{A. T.\} and H. Koch and T. Schroeder and Asgeirsson, \{D. J.\} and C. Hearty and Mattison, \{T. S.\} and McKenna, \{J. A.\} and M. Barrett and A. Khan and A. Randle-Conde and Blinov, \{V. E.\} and Bukin, \{A. D.\} and Buzykaev, \{A. R.\} and Druzhinin, \{V. P.\} and Golubev, \{V. B.\} and Onuchin, \{A. P.\} and Serednyakov, \{S. I.\} and Skovpen, \{Yu I.\} and Solodov, \{E. P.\} and Todyshev, \{K. Yu\} and M. Bondioli and S. Curry and I. Eschrich and Milanes, \{D. A.\}",

year = "2010",

month = may,

day = "19",

doi = "10.1103/PhysRevD.81.092003",

language = "English",

volume = "81",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

number = "9",

}

TY - JOUR

T1 - Observation of the χc2(2P) meson in the reaction γγ→ DD̄ at BABAR

AU - BABAR Collaboration

AU - Aubert, B.

AU - Karyotakis, Y.

AU - Lees, J. P.

AU - Poireau, V.

AU - Prencipe, E.

AU - Prudent, X.

AU - Tisserand, V.

AU - Garra Tico, J.

AU - Grauges, E.

AU - Martinelli, M.

AU - Palano, A.

AU - Pappagallo, M.

AU - Eigen, G.

AU - Stugu, B.

AU - Sun, L.

AU - Battaglia, M.

AU - Brown, D. N.

AU - Hooberman, B.

AU - Kerth, L. T.

AU - Kolomensky, Yu G.

AU - Lynch, G.

AU - Osipenkov, I. L.

AU - Tackmann, K.

AU - Tanabe, T.

AU - Hawkes, C. M.

AU - Soni, N.

AU - Watson, A. T.

AU - Koch, H.

AU - Schroeder, T.

AU - Asgeirsson, D. J.

AU - Hearty, C.

AU - Mattison, T. S.

AU - McKenna, J. A.

AU - Barrett, M.

AU - Khan, A.

AU - Randle-Conde, A.

AU - Blinov, V. E.

AU - Bukin, A. D.

AU - Buzykaev, A. R.

AU - Druzhinin, V. P.

AU - Golubev, V. B.

AU - Onuchin, A. P.

AU - Serednyakov, S. I.

AU - Skovpen, Yu I.

AU - Solodov, E. P.

AU - Todyshev, K. Yu

AU - Bondioli, M.

AU - Curry, S.

AU - Eschrich, I.

AU - Milanes, D. A.

PY - 2010/5/19

Y1 - 2010/5/19

N2 - A search for the Z(3930) resonance in γγ production of the DD̄ system has been performed using a data sample corresponding to an integrated luminosity of 384fb-1 recorded by the BABAR experiment at the PEP-II asymmetric-energy electron-positron collider. The DD̄ invariant mass distribution shows clear evidence of the Z(3930) state with a significance of 5.8σ. We determine mass and width values of (3926.7±2. 7±1.1)MeV/c2 and (21.3±6.8±3.6)MeV, respectively. A decay angular analysis provides evidence that the Z(3930) is a tensor state with positive parity and C parity (JPC=2++); therefore we identify the Z(3930) state as the χc2(2P) meson. The value of the partial width Γγγ×B(Z(3930)→DD̄) is found to be (0.24±0.05±0.04)keV.

AB - A search for the Z(3930) resonance in γγ production of the DD̄ system has been performed using a data sample corresponding to an integrated luminosity of 384fb-1 recorded by the BABAR experiment at the PEP-II asymmetric-energy electron-positron collider. The DD̄ invariant mass distribution shows clear evidence of the Z(3930) state with a significance of 5.8σ. We determine mass and width values of (3926.7±2. 7±1.1)MeV/c2 and (21.3±6.8±3.6)MeV, respectively. A decay angular analysis provides evidence that the Z(3930) is a tensor state with positive parity and C parity (JPC=2++); therefore we identify the Z(3930) state as the χc2(2P) meson. The value of the partial width Γγγ×B(Z(3930)→DD̄) is found to be (0.24±0.05±0.04)keV.

UR - https://www.scopus.com/pages/publications/77953176835

U2 - 10.1103/PhysRevD.81.092003

DO - 10.1103/PhysRevD.81.092003

M3 - Article

AN - SCOPUS:77953176835

SN - 1550-7998

VL - 81

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 9

M1 - 092003

ER -

Observation of the χc2(2P) meson in the reaction γγ→ DD̄ at BABAR

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