Study of χc2 production in photon-photon collisions

D. A. Bauer; R. Belcinski; R. C. Berg; H. H. Bingham; C. D. Buchanan; D. O. Caldwell; S. B. Chun; A. R. Clark; O. I. Dahl; M. Daoudi; J. J. Eastman; A. M. Eisner; K. H. Fairfield; G. Godfrey; G. S. Greenbaum; J. M. Hauptman; W. Hofmann; R. L. Holtzapple; S. Khacheryan; K. T. Knöpfle; R. R. Kofler; D. J. Lambert; J. G. Layter; W. T. Lin; S. C. Loken; A. Lu; G. R. Lynch; J. E. Lys; R. J. Madaras; H. Marsiske; G. E. Masek; E. S. Miller; N. A. Nicol; D. R. Nygren; Y. T. Oyang; H. P. Paar; A. P.T. Palounek; D. E. Pellet; M. T. Ronan; R. R. Ross; G. Shapiro; B. C. Shen; R. W. Stephens; M. L. Stevenson; M. G. Strauss; M. K. Sullivan; W. Vernon; E. M. Wang; Y. X. Wang; W. A. Wenzel; H. Yamamoto; S. J. Yellin; G. P. Yost; G. Zapalac; C. Zeitlin

doi:10.1016/0370-2693(93)90407-9

Study of χ_c2 production in photon-photon collisions

D. A. Bauer, R. Belcinski, R. C. Berg, H. H. Bingham, C. D. Buchanan, D. O. Caldwell, S. B. Chun, A. R. Clark, O. I. Dahl, M. Daoudi, J. J. Eastman, A. M. Eisner, K. H. Fairfield, G. Godfrey, G. S. Greenbaum, J. M. Hauptman, W. Hofmann, R. L. Holtzapple, S. Khacheryan, K. T. KnöpfleR. R. Kofler, D. J. Lambert, J. G. Layter, W. T. Lin, S. C. Loken, A. Lu, G. R. Lynch, J. E. Lys, R. J. Madaras, H. Marsiske, G. E. Masek, E. S. Miller, N. A. Nicol, D. R. Nygren, Y. T. Oyang, H. P. Paar, A. P.T. Palounek, D. E. Pellet, M. T. Ronan, R. R. Ross, G. Shapiro, B. C. Shen, R. W. Stephens, M. L. Stevenson, M. G. Strauss, M. K. Sullivan, W. Vernon, E. M. Wang, Y. X. Wang, W. A. Wenzel, H. Yamamoto, S. J. Yellin, G. P. Yost, G. Zapalac, C. Zeitlin

Department of Physics

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Abstract

Two-photon production of the charmonium state χ_c has been studied by the TPC/Two-Gamma experiment at the SLAC e⁺e^- collider PEP. We observe evidence of the χ_c2 state in the channel γγ→χ_c2, χ_c2→γJ/ψ, J/ψ→l⁺l^- and obtain a value of Γ_γγ(χ_c2)=3.4±1.7±0.9 keV. This is the first observation of the two-photon production of a χ_c state. Comparison is made with previous experimental results and QCD predictions for Γ_γγ(χ_c2).

Original language	English
Pages (from-to)	345-350
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	302
Issue number	2-3
DOIs	https://doi.org/10.1016/0370-2693(93)90407-9
State	Published - 25 Mar 1993

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Bauer, D. A., Belcinski, R., Berg, R. C., Bingham, H. H., Buchanan, C. D., Caldwell, D. O., Chun, S. B., Clark, A. R., Dahl, O. I., Daoudi, M., Eastman, J. J., Eisner, A. M., Fairfield, K. H., Godfrey, G., Greenbaum, G. S., Hauptman, J. M., Hofmann, W., Holtzapple, R. L., Khacheryan, S., ... Zeitlin, C. (1993). Study of χ_c2 production in photon-photon collisions. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 302(2-3), 345-350. https://doi.org/10.1016/0370-2693(93)90407-9

@article{b150f0e9c5ee481db851f65619fd98fb,

title = "Study of χc2 production in photon-photon collisions",

abstract = "Two-photon production of the charmonium state χc has been studied by the TPC/Two-Gamma experiment at the SLAC e+e- collider PEP. We observe evidence of the χc2 state in the channel γγ→χc2, χc2→γJ/ψ, J/ψ→l+l- and obtain a value of Γγγ(χc2)=3.4±1.7±0.9 keV. This is the first observation of the two-photon production of a χc state. Comparison is made with previous experimental results and QCD predictions for Γγγ(χc2).",

author = "Bauer, {D. A.} and R. Belcinski and Berg, {R. C.} and Bingham, {H. H.} and Buchanan, {C. D.} and Caldwell, {D. O.} and Chun, {S. B.} and Clark, {A. R.} and Dahl, {O. I.} and M. Daoudi and Eastman, {J. J.} and Eisner, {A. M.} and Fairfield, {K. H.} and G. Godfrey and Greenbaum, {G. S.} and Hauptman, {J. M.} and W. Hofmann and Holtzapple, {R. L.} and S. Khacheryan and Kn{\"o}pfle, {K. T.} and Kofler, {R. R.} and Lambert, {D. J.} and Layter, {J. G.} and Lin, {W. T.} and Loken, {S. C.} and A. Lu and Lynch, {G. R.} and Lys, {J. E.} and Madaras, {R. J.} and H. Marsiske and Masek, {G. E.} and Miller, {E. S.} and Nicol, {N. A.} and Nygren, {D. R.} and Oyang, {Y. T.} and Paar, {H. P.} and Palounek, {A. P.T.} and Pellet, {D. E.} and Ronan, {M. T.} and Ross, {R. R.} and G. Shapiro and Shen, {B. C.} and Stephens, {R. W.} and Stevenson, {M. L.} and Strauss, {M. G.} and Sullivan, {M. K.} and W. Vernon and Wang, {E. M.} and Wang, {Y. X.} and Wenzel, {W. A.} and H. Yamamoto and Yellin, {S. J.} and Yost, {G. P.} and G. Zapalac and C. Zeitlin",

note = "Funding Information: We gratefully acknowledge the efforts of the PEP staff for their dedication and productive running of the machine, and the engineers and technicians of the collaborating institutions for their efforts in the construction and maintenance of the detector. This work was supported in part by the US Department of Energy (under contracts DE-FG03-91ER40674, DEAS03-76ER70285, DE-FG03-9 IER40662, DE-AT03-87ER40327, DE-AM03-76SF00010, DE-AC03-76SF00098, DE-FG02-92ER40730, DE-FG02-92ER40715, and DE-AC03-76SF00515), and the National Science Foundation (under grants PHY91-19849 and PHY91-21416 ).",

year = "1993",

month = mar,

day = "25",

doi = "10.1016/0370-2693(93)90407-9",

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volume = "302",

pages = "345--350",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

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Bauer, DA, Belcinski, R, Berg, RC, Bingham, HH, Buchanan, CD, Caldwell, DO, Chun, SB, Clark, AR, Dahl, OI, Daoudi, M, Eastman, JJ, Eisner, AM, Fairfield, KH, Godfrey, G, Greenbaum, GS, Hauptman, JM, Hofmann, W, Holtzapple, RL, Khacheryan, S, Knöpfle, KT, Kofler, RR, Lambert, DJ, Layter, JG, Lin, WT, Loken, SC, Lu, A, Lynch, GR, Lys, JE, Madaras, RJ, Marsiske, H, Masek, GE, Miller, ES, Nicol, NA, Nygren, DR, Oyang, YT, Paar, HP, Palounek, APT, Pellet, DE, Ronan, MT, Ross, RR, Shapiro, G, Shen, BC, Stephens, RW, Stevenson, ML, Strauss, MG, Sullivan, MK, Vernon, W, Wang, EM, Wang, YX, Wenzel, WA, Yamamoto, H, Yellin, SJ, Yost, GP, Zapalac, G & Zeitlin, C 1993, 'Study of χ_c2 production in photon-photon collisions', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 302, no. 2-3, pp. 345-350. https://doi.org/10.1016/0370-2693(93)90407-9

TY - JOUR

T1 - Study of χc2 production in photon-photon collisions

AU - Bauer, D. A.

AU - Belcinski, R.

AU - Berg, R. C.

AU - Bingham, H. H.

AU - Buchanan, C. D.

AU - Caldwell, D. O.

AU - Chun, S. B.

AU - Clark, A. R.

AU - Dahl, O. I.

AU - Daoudi, M.

AU - Eastman, J. J.

AU - Eisner, A. M.

AU - Fairfield, K. H.

AU - Godfrey, G.

AU - Greenbaum, G. S.

AU - Hauptman, J. M.

AU - Hofmann, W.

AU - Holtzapple, R. L.

AU - Khacheryan, S.

AU - Knöpfle, K. T.

AU - Kofler, R. R.

AU - Lambert, D. J.

AU - Layter, J. G.

AU - Lin, W. T.

AU - Loken, S. C.

AU - Lu, A.

AU - Lynch, G. R.

AU - Lys, J. E.

AU - Madaras, R. J.

AU - Marsiske, H.

AU - Masek, G. E.

AU - Miller, E. S.

AU - Nicol, N. A.

AU - Nygren, D. R.

AU - Oyang, Y. T.

AU - Paar, H. P.

AU - Palounek, A. P.T.

AU - Pellet, D. E.

AU - Ronan, M. T.

AU - Ross, R. R.

AU - Shapiro, G.

AU - Shen, B. C.

AU - Stephens, R. W.

AU - Stevenson, M. L.

AU - Strauss, M. G.

AU - Sullivan, M. K.

AU - Vernon, W.

AU - Wang, E. M.

AU - Wang, Y. X.

AU - Wenzel, W. A.

AU - Yamamoto, H.

AU - Yellin, S. J.

AU - Yost, G. P.

AU - Zapalac, G.

AU - Zeitlin, C.

N1 - Funding Information: We gratefully acknowledge the efforts of the PEP staff for their dedication and productive running of the machine, and the engineers and technicians of the collaborating institutions for their efforts in the construction and maintenance of the detector. This work was supported in part by the US Department of Energy (under contracts DE-FG03-91ER40674, DEAS03-76ER70285, DE-FG03-9 IER40662, DE-AT03-87ER40327, DE-AM03-76SF00010, DE-AC03-76SF00098, DE-FG02-92ER40730, DE-FG02-92ER40715, and DE-AC03-76SF00515), and the National Science Foundation (under grants PHY91-19849 and PHY91-21416 ).

PY - 1993/3/25

Y1 - 1993/3/25

N2 - Two-photon production of the charmonium state χc has been studied by the TPC/Two-Gamma experiment at the SLAC e+e- collider PEP. We observe evidence of the χc2 state in the channel γγ→χc2, χc2→γJ/ψ, J/ψ→l+l- and obtain a value of Γγγ(χc2)=3.4±1.7±0.9 keV. This is the first observation of the two-photon production of a χc state. Comparison is made with previous experimental results and QCD predictions for Γγγ(χc2).

AB - Two-photon production of the charmonium state χc has been studied by the TPC/Two-Gamma experiment at the SLAC e+e- collider PEP. We observe evidence of the χc2 state in the channel γγ→χc2, χc2→γJ/ψ, J/ψ→l+l- and obtain a value of Γγγ(χc2)=3.4±1.7±0.9 keV. This is the first observation of the two-photon production of a χc state. Comparison is made with previous experimental results and QCD predictions for Γγγ(χc2).

UR - http://www.scopus.com/inward/record.url?scp=0002993379&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(93)90407-9

DO - 10.1016/0370-2693(93)90407-9

M3 - 期刊論文

AN - SCOPUS:0002993379

SN - 0370-2693

VL - 302

SP - 345

EP - 350

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 2-3

ER -

Study of χc2 production in photon-photon collisions

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Study of χ_c2 production in photon-photon collisions