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

Université Savoie Mont Blanc
University of Barcelona
INFN Sezione di Bari
Università degli studi di Bari Aldo Moro
University of Bergen
Ernest Orlando Lawrence Berkeley National Laboratory
University of Birmingham
Ruhr-University Bochum
University of British Columbia
Brunel University London
Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
Long Beach VA and University of California
University of California, Riverside
University of California, San Diego
University of California, Santa Barbara
University of California at Santa Cruz
California Institute of Technology
University of Cincinnati
University of Colorado Boulder
Cooperative Institute for Research in the Atmosphere
Temple University
University of Dortmund
Technical University Dresden
Ip Paris
University of Edinburgh
Sezione INFN di Ferrara
University of Ferrara
LNF-INFN
University of Perugia
Sezione di Genova
University of Genoa
Harvard University
University of Heidelberg
Humboldt-Universität zu Berlin
Imperial College London
University of Iowa
Iowa State University
Johns Hopkins University
Laboratoire de l'Accélérateur Linéaire
University of Rome
Lawrence Livermore National Laboratory
University of Liverpool
Queen Mary University of London
Royal Holloway University of London
University of Louisville
Johannes Gutenberg University
University of Manchester
University of Maryland, College Park
UMass Amherst
Massachusetts Institute of Technology
McGill University
Sezione INFN di Milano
University of Milano
University of Mississippi
Universety of South Alabama
Universite de Montreal
Mount Holyoke College
INFN Sezione di Napoli
University of Naples Federico II
Science Park 105
University of Notre Dame
The Ohio State University
University of Oregon
INFN
University of Padova
Universités Paris VI and VII
University of Pennsylvania
INFN Sezione di Perugia
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
University of Pisa
Dipartimento di Scienze Biomediche
Scuola Normale Superiore di Pisa
Princeton University
Sezione di Roma
Dipartimento di Fisica
Universität Rostock
CCLRC Rutherford Appleton Laboratory
CEA/UVSQ/CNRS
Stanford Linear Accelerator Center
University of South Carolina
Stanford University
State University of New York Albany
Tel Aviv University
University of Tennessee
The University of Texas at Austin
University of Texas
INFN Sezione di Torino
University of Turin
INFN Sezione di Trieste
University of Trieste
University of Valencia
University of Victoria
University of Warwick
University of Wisconsin-Madison

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

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
Publication status	Published - 19 May 2010

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10.1103/PhysRevD.81.092003

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@article{f42c3da6df224a06be3b43196c9e7263,

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 D. Bernard and M. Verderi",

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 - Bernard, D.

AU - Verderi, M.

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.

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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