Two-photon production of charged pion and kaon pairs

J. Dominick; M. Lambrecht; S. Sanghera; V. Shelkov; T. Skwarnicki; R. Stroynowski; I. Volobouev; G. Wei; P. Zadorozhny; M. Artuso; M. Goldberg; D. He; N. Horwitz; R. Kennett; R. Mountain; G. C. Moneti; F. Muheim; Y. Mukhin; S. Playfer; Y. Rozen; S. Stone; M. Thulasidas; G. Vasseur; G. Zhu; J. Bartelt; S. E. Csorna; Z. Egyed; V. Jain; K. Kinoshita; K. W. Edwards; M. Ogg; D. I. Britton; E. R.F. Hyatt; D. B. MacFarlane; P. M. Patel; D. S. Akerib; B. Barish; M. Chadha; S. Chan; D. F. Cowen; G. Eigen; J. S. Miller; C. O'Grady; J. Urheim; A. J. Weinstein; D. Acosta; M. Athanas; G. Masek; H. P. Paar; M. Sivertz; J. Gronberg; R. Kutschke; S. Menary; R. J. Morrison; S. Nakanishi; H. N. Nelson; T. K. Nelson; C. Qiao; J. D. Richman; A. Ryd; H. Tajima; D. Sperka; M. S. Witherell; M. Procario; R. Balest; K. Cho; M. Daoudi; W. T. Ford; D. R. Johnson; K. Lingel; M. Lohner; P. Rankin; J. G. Smith; J. P. Alexander; C. Bebek; K. Berkelman; K. Bloom; T. E. Browder; D. G. Cassel; H. A. Cho; D. M. Coffman; P. S. Drell; R. Ehrlich; P. Gaiderev; R. S. Galik; M. Garcia-Sciveres; B. Geiser; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; C. D. Jones; S. L. Jones; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; C. R. Ng; E. Nordberg; J. R. Patterson; D. Peterson; D. Riley; S. Salman; M. Sapper; F. Würthwein; P. Avery; A. Freyberger; J. Rodriguez; R. Stephens; S. Yang; J. Yelton; D. Cinabro; S. Henderson; T. Liu; M. Saulnier; R. Wilson; H. Yamamoto; T. Bergfeld; B. I. Eisenstein; G. Gollin; B. Ong; M. Palmer; M. Selen; J. J. Thaler; A. J. Sadoff; R. Ammar; S. Ball; P. Baringer; A. Bean; D. Besson; D. Coppage; N. Copty; R. Davis; N. Hancock; M. Kelly; N. Kwak; H. Lam; Y. Kubota; M. Lattery; J. K. Nelson; S. Patton; D. Perticone; R. Poling; V. Savinov; S. Schrenk; R. Wang; M. S. Alam; I. J. Kim; B. Nemati; J. J. O'Neill; H. Severini; C. R. Sun; M. M. Zoeller; G. Crawford; C. M. Daubenmier; R. Fulton; D. Fujino; K. K. Gan; K. Honscheid; H. Kagan; R. Kass; J. Lee; R. Malchow; Y. Skovpen; M. Sung; C. White; F. Butler; X. Fu; G. Kalbfleisch; W. R. Ross; P. Skubic; J. Snow; P. L. Wang; M. Wood; D. N. Brown; J. Fast; R. L. McIlwain; T. Miao; D. H. Miller; M. Modesitt; D. Payne; E. I. Shibata; I. P.J. Shipsey; P. N. Wang; M. Battle; J. Ernst; Y. Kwon; S. Roberts; E. H. Thorndike; C. H. Wang

doi:10.1103/PhysRevD.50.3027

Two-photon production of charged pion and kaon pairs

J. Dominick, M. Lambrecht, S. Sanghera, V. Shelkov, T. Skwarnicki, R. Stroynowski, I. Volobouev, G. Wei, P. Zadorozhny, M. Artuso, M. Goldberg, D. He, N. Horwitz, R. Kennett, R. Mountain, G. C. Moneti, F. Muheim, Y. Mukhin, S. Playfer, Y. RozenS. Stone, M. Thulasidas, G. Vasseur, G. Zhu, J. Bartelt, S. E. Csorna, Z. Egyed, V. Jain, K. Kinoshita, K. W. Edwards, M. Ogg, D. I. Britton, E. R.F. Hyatt, D. B. MacFarlane, P. M. Patel, D. S. Akerib, B. Barish, M. Chadha, S. Chan, D. F. Cowen, G. Eigen, J. S. Miller, C. O'Grady, J. Urheim, A. J. Weinstein, D. Acosta, M. Athanas, G. Masek, H. P. Paar, M. Sivertz, J. Gronberg, R. Kutschke, S. Menary, R. J. Morrison, S. Nakanishi, H. N. Nelson, T. K. Nelson, C. Qiao, J. D. Richman, A. Ryd, H. Tajima, D. Sperka, M. S. Witherell, M. Procario, R. Balest, K. Cho, M. Daoudi, W. T. Ford, D. R. Johnson, K. Lingel, M. Lohner, P. Rankin, J. G. Smith, J. P. Alexander, C. Bebek, K. Berkelman, K. Bloom, T. E. Browder, D. G. Cassel, H. A. Cho, D. M. Coffman, P. S. Drell, R. Ehrlich, P. Gaiderev, R. S. Galik, M. Garcia-Sciveres, B. Geiser, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, C. D. Jones, S. L. Jones, J. Kandaswamy, N. Katayama, P. C. Kim, D. L. Kreinick, G. S. Ludwig, J. Masui, J. Mevissen, N. B. Mistry, C. R. Ng, E. Nordberg, J. R. Patterson, D. Peterson, D. Riley, S. Salman, M. Sapper, F. Würthwein, P. Avery, A. Freyberger, J. Rodriguez, R. Stephens, S. Yang, J. Yelton, D. Cinabro, S. Henderson, T. Liu, M. Saulnier, R. Wilson, H. Yamamoto, T. Bergfeld, B. I. Eisenstein, G. Gollin, B. Ong, M. Palmer, M. Selen, J. J. Thaler, A. J. Sadoff, R. Ammar, S. Ball, P. Baringer, A. Bean, D. Besson, D. Coppage, N. Copty, R. Davis, N. Hancock, M. Kelly, N. Kwak, H. Lam, Y. Kubota, M. Lattery, J. K. Nelson, S. Patton, D. Perticone, R. Poling, V. Savinov, S. Schrenk, R. Wang, M. S. Alam, I. J. Kim, B. Nemati, J. J. O'Neill, H. Severini, C. R. Sun, M. M. Zoeller, G. Crawford, C. M. Daubenmier, R. Fulton, D. Fujino, K. K. Gan, K. Honscheid, H. Kagan, R. Kass, J. Lee, R. Malchow, Y. Skovpen, M. Sung, C. White, F. Butler, X. Fu, G. Kalbfleisch, W. R. Ross, P. Skubic, J. Snow, P. L. Wang, M. Wood, D. N. Brown, J. Fast, R. L. McIlwain, T. Miao, D. H. Miller, M. Modesitt, D. Payne, E. I. Shibata, I. P.J. Shipsey, P. N. Wang, M. Battle, J. Ernst, Y. Kwon, S. Roberts, E. H. Thorndike, C. H. Wang

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Abstract

A measurement of the cross section for the combined two-photon production of charged pion and kaon pairs is performed using 1.2 fb-1 of data collected by the CLEO II detector at the Cornell Electron Storage Ring. The cross section is measured at invariant masses of the two-photon system between 1.5 and 5.0 GeV/c2, and at scattering angles more than 53° away from the γγ collision axis in the γγ center-of-mass frame. The large background of leptonic events is suppressed by utilizing the CsI calorimeter in conjunction with the muon chamber system. The reported cross section is compared with leading order QCD models as well as previous experiments. Although the functional dependence of the measured cross section disagrees with leading order QCD at small values of the two-photon invaraint mass, the data show qualitatively a transition to perturbative behavior at an invariant mass of approximately 2.5 GeV/c2.

Original language	English (US)
Pages (from-to)	3027-3037
Number of pages	11
Journal	Physical Review D
Volume	50
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevD.50.3027
State	Published - 1994

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1103/PhysRevD.50.3027

Cite this

Dominick, J., Lambrecht, M., Sanghera, S., Shelkov, V., Skwarnicki, T., Stroynowski, R., Volobouev, I., Wei, G., Zadorozhny, P., Artuso, M., Goldberg, M., He, D., Horwitz, N., Kennett, R., Mountain, R., Moneti, G. C., Muheim, F., Mukhin, Y., Playfer, S., ... Wang, C. H. (1994). Two-photon production of charged pion and kaon pairs. Physical Review D, 50(5), 3027-3037. https://doi.org/10.1103/PhysRevD.50.3027

@article{b432438218a5473dba92c838ebb19fd6,

title = "Two-photon production of charged pion and kaon pairs",

abstract = "A measurement of the cross section for the combined two-photon production of charged pion and kaon pairs is performed using 1.2 fb-1 of data collected by the CLEO II detector at the Cornell Electron Storage Ring. The cross section is measured at invariant masses of the two-photon system between 1.5 and 5.0 GeV/c2, and at scattering angles more than 53° away from the γγ collision axis in the γγ center-of-mass frame. The large background of leptonic events is suppressed by utilizing the CsI calorimeter in conjunction with the muon chamber system. The reported cross section is compared with leading order QCD models as well as previous experiments. Although the functional dependence of the measured cross section disagrees with leading order QCD at small values of the two-photon invaraint mass, the data show qualitatively a transition to perturbative behavior at an invariant mass of approximately 2.5 GeV/c2.",

author = "J. Dominick and M. Lambrecht and S. Sanghera and V. Shelkov and T. Skwarnicki and R. Stroynowski and I. Volobouev and G. Wei and P. Zadorozhny and M. Artuso and M. Goldberg and D. He and N. Horwitz and R. Kennett and R. Mountain and Moneti, {G. C.} and F. Muheim and Y. Mukhin and S. Playfer and Y. Rozen and S. Stone and M. Thulasidas and G. Vasseur and G. Zhu and J. Bartelt and Csorna, {S. E.} and Z. Egyed and V. Jain and K. Kinoshita and Edwards, {K. W.} and M. Ogg and Britton, {D. I.} and Hyatt, {E. R.F.} and MacFarlane, {D. B.} and Patel, {P. M.} and Akerib, {D. S.} and B. Barish and M. Chadha and S. Chan and Cowen, {D. F.} and G. Eigen and Miller, {J. S.} and C. O'Grady and J. Urheim and Weinstein, {A. J.} and D. Acosta and M. Athanas and G. Masek and Paar, {H. P.} and M. Sivertz and J. Gronberg and R. Kutschke and S. Menary and Morrison, {R. J.} and S. Nakanishi and Nelson, {H. N.} and Nelson, {T. K.} and C. Qiao and Richman, {J. D.} and A. Ryd and H. Tajima and D. Sperka and Witherell, {M. S.} and M. Procario and R. Balest and K. Cho and M. Daoudi and Ford, {W. T.} and Johnson, {D. R.} and K. Lingel and M. Lohner and P. Rankin and Smith, {J. G.} and Alexander, {J. P.} and C. Bebek and K. Berkelman and K. Bloom and Browder, {T. E.} and Cassel, {D. G.} and Cho, {H. A.} and Coffman, {D. M.} and Drell, {P. S.} and R. Ehrlich and P. Gaiderev and Galik, {R. S.} and M. Garcia-Sciveres and B. Geiser and B. Gittelman and Gray, {S. W.} and Hartill, {D. L.} and Heltsley, {B. K.} and Jones, {C. D.} and Jones, {S. L.} and J. Kandaswamy and N. Katayama and Kim, {P. C.} and Kreinick, {D. L.} and Ludwig, {G. S.} and J. Masui and J. Mevissen and Mistry, {N. B.} and Ng, {C. R.} and E. Nordberg and Patterson, {J. R.} and D. Peterson and D. Riley and S. Salman and M. Sapper and F. W{\"u}rthwein and P. Avery and A. Freyberger and J. Rodriguez and R. Stephens and S. Yang and J. Yelton and D. Cinabro and S. Henderson and T. Liu and M. Saulnier and R. Wilson and H. Yamamoto and T. Bergfeld and Eisenstein, {B. I.} and G. Gollin and B. Ong and M. Palmer and M. Selen and Thaler, {J. J.} and Sadoff, {A. J.} and R. Ammar and S. Ball and P. Baringer and A. Bean and D. Besson and D. Coppage and N. Copty and R. Davis and N. Hancock and M. Kelly and N. Kwak and H. Lam and Y. Kubota and M. Lattery and Nelson, {J. K.} and S. Patton and D. Perticone and R. Poling and V. Savinov and S. Schrenk and R. Wang and Alam, {M. S.} and Kim, {I. J.} and B. Nemati and O'Neill, {J. J.} and H. Severini and Sun, {C. R.} and Zoeller, {M. M.} and G. Crawford and Daubenmier, {C. M.} and R. Fulton and D. Fujino and Gan, {K. K.} and K. Honscheid and H. Kagan and R. Kass and J. Lee and R. Malchow and Y. Skovpen and M. Sung and C. White and F. Butler and X. Fu and G. Kalbfleisch and Ross, {W. R.} and P. Skubic and J. Snow and Wang, {P. L.} and M. Wood and Brown, {D. N.} and J. Fast and McIlwain, {R. L.} and T. Miao and Miller, {D. H.} and M. Modesitt and D. Payne and Shibata, {E. I.} and Shipsey, {I. P.J.} and Wang, {P. N.} and M. Battle and J. Ernst and Y. Kwon and S. Roberts and Thorndike, {E. H.} and Wang, {C. H.}",

year = "1994",

doi = "10.1103/PhysRevD.50.3027",

language = "English (US)",

volume = "50",

pages = "3027--3037",

journal = "Physical review D: Particles and fields",

issn = "0556-2821",

publisher = "American Institute of Physics",

number = "5",

}

Dominick, J, Lambrecht, M, Sanghera, S, Shelkov, V, Skwarnicki, T, Stroynowski, R, Volobouev, I, Wei, G, Zadorozhny, P, Artuso, M, Goldberg, M, He, D, Horwitz, N, Kennett, R, Mountain, R, Moneti, GC, Muheim, F, Mukhin, Y, Playfer, S, Rozen, Y, Stone, S, Thulasidas, M, Vasseur, G, Zhu, G, Bartelt, J, Csorna, SE, Egyed, Z, Jain, V, Kinoshita, K, Edwards, KW, Ogg, M, Britton, DI, Hyatt, ERF, MacFarlane, DB, Patel, PM, Akerib, DS, Barish, B, Chadha, M, Chan, S, Cowen, DF, Eigen, G, Miller, JS, O'Grady, C, Urheim, J, Weinstein, AJ, Acosta, D, Athanas, M, Masek, G, Paar, HP, Sivertz, M, Gronberg, J, Kutschke, R, Menary, S, Morrison, RJ, Nakanishi, S, Nelson, HN, Nelson, TK, Qiao, C, Richman, JD, Ryd, A, Tajima, H, Sperka, D, Witherell, MS, Procario, M, Balest, R, Cho, K, Daoudi, M, Ford, WT, Johnson, DR, Lingel, K, Lohner, M, Rankin, P, Smith, JG, Alexander, JP, Bebek, C, Berkelman, K, Bloom, K, Browder, TE, Cassel, DG, Cho, HA, Coffman, DM, Drell, PS, Ehrlich, R, Gaiderev, P, Galik, RS, Garcia-Sciveres, M, Geiser, B, Gittelman, B, Gray, SW, Hartill, DL, Heltsley, BK, Jones, CD, Jones, SL, Kandaswamy, J, Katayama, N, Kim, PC, Kreinick, DL, Ludwig, GS, Masui, J, Mevissen, J, Mistry, NB, Ng, CR, Nordberg, E, Patterson, JR, Peterson, D, Riley, D, Salman, S, Sapper, M, Würthwein, F, Avery, P, Freyberger, A, Rodriguez, J, Stephens, R, Yang, S, Yelton, J, Cinabro, D, Henderson, S, Liu, T, Saulnier, M, Wilson, R, Yamamoto, H, Bergfeld, T, Eisenstein, BI, Gollin, G, Ong, B, Palmer, M, Selen, M, Thaler, JJ, Sadoff, AJ, Ammar, R, Ball, S, Baringer, P, Bean, A, Besson, D, Coppage, D, Copty, N, Davis, R, Hancock, N, Kelly, M, Kwak, N, Lam, H, Kubota, Y, Lattery, M, Nelson, JK, Patton, S, Perticone, D, Poling, R, Savinov, V, Schrenk, S, Wang, R, Alam, MS, Kim, IJ, Nemati, B, O'Neill, JJ, Severini, H, Sun, CR, Zoeller, MM, Crawford, G, Daubenmier, CM, Fulton, R, Fujino, D, Gan, KK, Honscheid, K, Kagan, H, Kass, R, Lee, J, Malchow, R, Skovpen, Y, Sung, M, White, C, Butler, F, Fu, X, Kalbfleisch, G, Ross, WR, Skubic, P, Snow, J, Wang, PL, Wood, M, Brown, DN, Fast, J, McIlwain, RL, Miao, T, Miller, DH, Modesitt, M, Payne, D, Shibata, EI, Shipsey, IPJ, Wang, PN, Battle, M, Ernst, J, Kwon, Y, Roberts, S, Thorndike, EH & Wang, CH 1994, 'Two-photon production of charged pion and kaon pairs', Physical Review D, vol. 50, no. 5, pp. 3027-3037. https://doi.org/10.1103/PhysRevD.50.3027

TY - JOUR

T1 - Two-photon production of charged pion and kaon pairs

AU - Dominick, J.

AU - Lambrecht, M.

AU - Sanghera, S.

AU - Shelkov, V.

AU - Skwarnicki, T.

AU - Stroynowski, R.

AU - Volobouev, I.

AU - Wei, G.

AU - Zadorozhny, P.

AU - Artuso, M.

AU - Goldberg, M.

AU - He, D.

AU - Horwitz, N.

AU - Kennett, R.

AU - Mountain, R.

AU - Moneti, G. C.

AU - Muheim, F.

AU - Mukhin, Y.

AU - Playfer, S.

AU - Rozen, Y.

AU - Stone, S.

AU - Thulasidas, M.

AU - Vasseur, G.

AU - Zhu, G.

AU - Bartelt, J.

AU - Csorna, S. E.

AU - Egyed, Z.

AU - Jain, V.

AU - Kinoshita, K.

AU - Edwards, K. W.

AU - Ogg, M.

AU - Britton, D. I.

AU - Hyatt, E. R.F.

AU - MacFarlane, D. B.

AU - Patel, P. M.

AU - Akerib, D. S.

AU - Barish, B.

AU - Chadha, M.

AU - Chan, S.

AU - Cowen, D. F.

AU - Eigen, G.

AU - Miller, J. S.

AU - O'Grady, C.

AU - Urheim, J.

AU - Weinstein, A. J.

AU - Acosta, D.

AU - Athanas, M.

AU - Masek, G.

AU - Paar, H. P.

AU - Sivertz, M.

AU - Gronberg, J.

AU - Kutschke, R.

AU - Menary, S.

AU - Morrison, R. J.

AU - Nakanishi, S.

AU - Nelson, H. N.

AU - Nelson, T. K.

AU - Qiao, C.

AU - Richman, J. D.

AU - Ryd, A.

AU - Tajima, H.

AU - Sperka, D.

AU - Witherell, M. S.

AU - Procario, M.

AU - Balest, R.

AU - Cho, K.

AU - Daoudi, M.

AU - Ford, W. T.

AU - Johnson, D. R.

AU - Lingel, K.

AU - Lohner, M.

AU - Rankin, P.

AU - Smith, J. G.

AU - Alexander, J. P.

AU - Bebek, C.

AU - Berkelman, K.

AU - Bloom, K.

AU - Browder, T. E.

AU - Cassel, D. G.

AU - Cho, H. A.

AU - Coffman, D. M.

AU - Drell, P. S.

AU - Ehrlich, R.

AU - Gaiderev, P.

AU - Galik, R. S.

AU - Garcia-Sciveres, M.

AU - Geiser, B.

AU - Gittelman, B.

AU - Gray, S. W.

AU - Hartill, D. L.

AU - Heltsley, B. K.

AU - Jones, C. D.

AU - Jones, S. L.

AU - Kandaswamy, J.

AU - Katayama, N.

AU - Kim, P. C.

AU - Kreinick, D. L.

AU - Ludwig, G. S.

AU - Masui, J.

AU - Mevissen, J.

AU - Mistry, N. B.

AU - Ng, C. R.

AU - Nordberg, E.

AU - Patterson, J. R.

AU - Peterson, D.

AU - Riley, D.

AU - Salman, S.

AU - Sapper, M.

AU - Würthwein, F.

AU - Avery, P.

AU - Freyberger, A.

AU - Rodriguez, J.

AU - Stephens, R.

AU - Yang, S.

AU - Yelton, J.

AU - Cinabro, D.

AU - Henderson, S.

AU - Liu, T.

AU - Saulnier, M.

AU - Wilson, R.

AU - Yamamoto, H.

AU - Bergfeld, T.

AU - Eisenstein, B. I.

AU - Gollin, G.

AU - Ong, B.

AU - Palmer, M.

AU - Selen, M.

AU - Thaler, J. J.

AU - Sadoff, A. J.

AU - Ammar, R.

AU - Ball, S.

AU - Baringer, P.

AU - Bean, A.

AU - Besson, D.

AU - Coppage, D.

AU - Copty, N.

AU - Davis, R.

AU - Hancock, N.

AU - Kelly, M.

AU - Kwak, N.

AU - Lam, H.

AU - Kubota, Y.

AU - Lattery, M.

AU - Nelson, J. K.

AU - Patton, S.

AU - Perticone, D.

AU - Poling, R.

AU - Savinov, V.

AU - Schrenk, S.

AU - Wang, R.

AU - Alam, M. S.

AU - Kim, I. J.

AU - Nemati, B.

AU - O'Neill, J. J.

AU - Severini, H.

AU - Sun, C. R.

AU - Zoeller, M. M.

AU - Crawford, G.

AU - Daubenmier, C. M.

AU - Fulton, R.

AU - Fujino, D.

AU - Gan, K. K.

AU - Honscheid, K.

AU - Kagan, H.

AU - Kass, R.

AU - Lee, J.

AU - Malchow, R.

AU - Skovpen, Y.

AU - Sung, M.

AU - White, C.

AU - Butler, F.

AU - Fu, X.

AU - Kalbfleisch, G.

AU - Ross, W. R.

AU - Skubic, P.

AU - Snow, J.

AU - Wang, P. L.

AU - Wood, M.

AU - Brown, D. N.

AU - Fast, J.

AU - McIlwain, R. L.

AU - Miao, T.

AU - Miller, D. H.

AU - Modesitt, M.

AU - Payne, D.

AU - Shibata, E. I.

AU - Shipsey, I. P.J.

AU - Wang, P. N.

AU - Battle, M.

AU - Ernst, J.

AU - Kwon, Y.

AU - Roberts, S.

AU - Thorndike, E. H.

AU - Wang, C. H.

PY - 1994

Y1 - 1994

N2 - A measurement of the cross section for the combined two-photon production of charged pion and kaon pairs is performed using 1.2 fb-1 of data collected by the CLEO II detector at the Cornell Electron Storage Ring. The cross section is measured at invariant masses of the two-photon system between 1.5 and 5.0 GeV/c2, and at scattering angles more than 53° away from the γγ collision axis in the γγ center-of-mass frame. The large background of leptonic events is suppressed by utilizing the CsI calorimeter in conjunction with the muon chamber system. The reported cross section is compared with leading order QCD models as well as previous experiments. Although the functional dependence of the measured cross section disagrees with leading order QCD at small values of the two-photon invaraint mass, the data show qualitatively a transition to perturbative behavior at an invariant mass of approximately 2.5 GeV/c2.

AB - A measurement of the cross section for the combined two-photon production of charged pion and kaon pairs is performed using 1.2 fb-1 of data collected by the CLEO II detector at the Cornell Electron Storage Ring. The cross section is measured at invariant masses of the two-photon system between 1.5 and 5.0 GeV/c2, and at scattering angles more than 53° away from the γγ collision axis in the γγ center-of-mass frame. The large background of leptonic events is suppressed by utilizing the CsI calorimeter in conjunction with the muon chamber system. The reported cross section is compared with leading order QCD models as well as previous experiments. Although the functional dependence of the measured cross section disagrees with leading order QCD at small values of the two-photon invaraint mass, the data show qualitatively a transition to perturbative behavior at an invariant mass of approximately 2.5 GeV/c2.

UR - http://www.scopus.com/inward/record.url?scp=26544455691&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=26544455691&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.50.3027

DO - 10.1103/PhysRevD.50.3027

M3 - Article

AN - SCOPUS:26544455691

SN - 0556-2821

VL - 50

SP - 3027

EP - 3037

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

IS - 5

ER -

Two-photon production of charged pion and kaon pairs

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