Hadronic transitions Y (2S)→Y(1S)

J. P. Alexander; R. Baker; C. Bebek; B. E. Berger; K. Berkelman; K. Bloom; V. Boisvert; D. G. Cassel; D. S. Crowcroft; M. Dickson; S. von Dombrowski; P. S. Drell; K. M. Ecklund; R. Ehrlich; A. D. Foland; P. Gaidarev; R. S. Galik; L. Gibbons; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; P. I. Hopman; J. Kandaswamy; P. C. Kim; D. L. Kreinick; T. Lee; Y. Liu; N. B. Mistry; C. R. Ng; E. Nordberg; M. Ogg; J. R. Patterson; D. Peterson; D. Riley; A. Soffer; B. Valant-Spaight; C. Ward; M. Athanas; P. Avery; C. D. Jones; M. Lohner; S. Patton; C. Prescott; J. Yelton; J. Zheng; G. Brandenburg; R. A. Briere; A. Ershov; Y. S. Gao; D. Y.J. Kim; R. Wilson; H. Yamamoto; T. E. Browder; Y. Li; J. L. Rodriguez; T. Bergfeld; B. I. Eisenstein; J. Ernst; G. E. Gladding; G. D. Gollin; R. M. Hans; E. Johnson; I. Karliner; M. A. Marsh; M. Palmer; M. Selen; J. J. Thaler; K. W. Edwards; A. Bellerive; R. Janicek; D. B. MacFarlane; P. M. Patel; A. J. Sadoff; R. Ammar; P. Baringer; A. Bean; D. Besson; D. Coppage; C. Darling; R. Davis; S. Kotov; I. Kravchenko; N. Kwak; L. Zhou; S. Anderson; Y. Kubota; S. J. Lee; J. J. O'Neill; R. Poling; T. Riehle; A. Smith; M. S. Alam; S. B. Athar; Z. Ling; A. H. Mahmood; S. Timm; F. Wappler; A. Anastassov; J. E. Duboscq; D. Fujino; K. K. Gan; T. Hart; K. Honscheid; H. Kagan; R. Kass; J. Lee; M. B. Spencer; M. Sung; A. Undrus; R. Wanke; A. Wolf; M. M. Zoeller; B. Nemati; S. J. Richichi; W. R. Ross; H. Severini; P. Skubic; M. Bishai; J. Fast; J. W. Hinson; N. Menon; D. H. Miller; E. I. Shibata; I. P.J. Shipsey; M. Yurko; S. Glenn; S. D. Johnson; Y. Kwon; S. Roberts; E. H. Thorndike; C. P. Jessop; K. Lingel; H. Marsiske; M. L. Perl; V. Savinov; D. Ugolini; R. Wang; X. Zhou; T. E. Coan; V. Fadeyev; I. Korolkov; Y. Maravin; I. Narsky; V. Shelkov; J. Staeck; R. Stroynowski; I. Volobouev; J. Ye; M. Artuso; F. Azfar; A. Efimov; M. Goldberg; D. He; S. Kopp; G. C. Moneti; R. Mountain; S. Schuh; T. Skwarnicki; S. Stone; G. Viehhauser; X. Xing; J. Bartelt; S. E. Csorna; V. Jain; K. W. McLean; S. Marka; R. Godang; K. Kinoshita; I. C. Lai; P. Pomianowski; S. Schrenk; G. Bonvicini; D. Cinabro; R. Greene; L. P. Perera; G. J. Zhou; M. Chadha; S. Chan; G. Eigen; J. S. Miller; C. O'Grady; M. Schmidtler; J. Urheim; A. J. Weinstein; F. Würthwein; D. W. Bliss; G. Masek; H. P. Paar; S. Prell; V. Sharma; D. M. Asner; J. Gronberg; T. S. Hill; D. J. Lange; R. J. Morrison; H. N. Nelson; T. K. Nelson; D. Roberts; A. Ryd; R. Balest; B. H. Behrens; W. T. Ford; A. Gritsan; H. Park; J. Roy; J. G. Smith

Hadronic transitions Y (2S)→Y(1S)

J. P. Alexander, R. Baker, C. Bebek, B. E. Berger, K. Berkelman, K. Bloom, V. Boisvert, D. G. Cassel, D. S. Crowcroft, M. Dickson, S. von Dombrowski, P. S. Drell, K. M. Ecklund, R. Ehrlich, A. D. Foland, P. Gaidarev, R. S. Galik, L. Gibbons, B. Gittelman, S. W. GrayD. L. Hartill, B. K. Heltsley, P. I. Hopman, J. Kandaswamy, P. C. Kim, D. L. Kreinick, T. Lee, Y. Liu, N. B. Mistry, C. R. Ng, E. Nordberg, M. Ogg, J. R. Patterson, D. Peterson, D. Riley, A. Soffer, B. Valant-Spaight, C. Ward, M. Athanas, P. Avery, C. D. Jones, M. Lohner, S. Patton, C. Prescott, J. Yelton, J. Zheng, G. Brandenburg, R. A. Briere, A. Ershov, Y. S. Gao, D. Y.J. Kim, R. Wilson, H. Yamamoto, T. E. Browder, Y. Li, J. L. Rodriguez, T. Bergfeld, B. I. Eisenstein, J. Ernst, G. E. Gladding, G. D. Gollin, R. M. Hans, E. Johnson, I. Karliner, M. A. Marsh, M. Palmer, M. Selen, J. J. Thaler, K. W. Edwards, A. Bellerive, R. Janicek, D. B. MacFarlane, P. M. Patel, A. J. Sadoff, R. Ammar, P. Baringer, A. Bean, D. Besson, D. Coppage, C. Darling, R. Davis, S. Kotov, I. Kravchenko, N. Kwak, L. Zhou, S. Anderson, Y. Kubota, S. J. Lee, J. J. O'Neill, R. Poling, T. Riehle, A. Smith, M. S. Alam, S. B. Athar, Z. Ling, A. H. Mahmood, S. Timm, F. Wappler, A. Anastassov, J. E. Duboscq, D. Fujino, K. K. Gan, T. Hart, K. Honscheid, H. Kagan, R. Kass, J. Lee, M. B. Spencer, M. Sung, A. Undrus, R. Wanke, A. Wolf, M. M. Zoeller, B. Nemati, S. J. Richichi, W. R. Ross, H. Severini, P. Skubic, M. Bishai, J. Fast, J. W. Hinson, N. Menon, D. H. Miller, E. I. Shibata, I. P.J. Shipsey, M. Yurko, S. Glenn, S. D. Johnson, Y. Kwon, S. Roberts, E. H. Thorndike, C. P. Jessop, K. Lingel, H. Marsiske, M. L. Perl, V. Savinov, D. Ugolini, R. Wang, X. Zhou, T. E. Coan, V. Fadeyev, I. Korolkov, Y. Maravin, I. Narsky, V. Shelkov, J. Staeck, R. Stroynowski, I. Volobouev, J. Ye, M. Artuso, F. Azfar, A. Efimov, M. Goldberg, D. He, S. Kopp, G. C. Moneti, R. Mountain, S. Schuh, T. Skwarnicki, S. Stone, G. Viehhauser, X. Xing, J. Bartelt, S. E. Csorna, V. Jain, K. W. McLean, S. Marka, R. Godang, K. Kinoshita, I. C. Lai, P. Pomianowski, S. Schrenk, G. Bonvicini, D. Cinabro, R. Greene, L. P. Perera, G. J. Zhou, M. Chadha, S. Chan, G. Eigen, J. S. Miller, C. O'Grady, M. Schmidtler, J. Urheim, A. J. Weinstein, F. Würthwein, D. W. Bliss, G. Masek, H. P. Paar, S. Prell, V. Sharma, D. M. Asner, J. Gronberg, T. S. Hill, D. J. Lange, R. J. Morrison, H. N. Nelson, T. K. Nelson, D. Roberts, A. Ryd, R. Balest, B. H. Behrens, W. T. Ford, A. Gritsan, H. Park, J. Roy, J. G. Smith

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

1 Scopus citations

Abstract

Using a 73.6 pb^-1 data sample of Y(2S) events collected with the CLEO II detector at the Cornell Electron Storage Ring, we have investigated the hadronic transitions between the Y(2S) and the Y(1S). The dipion transition Y(2S)→Y(1S)π⁺π was studied using two different analysis techniques. Selecting events in which Y(1S)→e⁺e^-,μ⁺μ^- ("exclusive" analysis), and using the Y(1S) leptonic branching fractions world averages from the PDG review, we obtained B(Y(2S)→Y(1S)π⁺π^-) = 0.189±0.004±0.010, while using a method allowing Y(1S)→anything ("inclusive" analysis) we obtained B(Y(2S)→Y(1S)π⁺π^- = 0.196 ±0.002±0.010. The appropriate weighted average of the two measurements gives B(Y(2S) →Y(1S)μ⁺μ^-) = 0.192±0.002±0.010. Combining the exclusive and inclusive results we derive the Y(1S) leptonic branching fractions B_ee = 0.0229±0.0008±0.0011 and B_μμ = 0.0249±0.0008±0.0013. We also studied Y(2S)→Y(1S)π⁰π⁰ and obtained B(Y(2S)→Y(1S)π⁰π⁰) = 0.092±0.006±0.008. Parameters of the ππ system (dipion invariant mass spectra, angular distributions) were analyzed and found to be consistent with current theoretical models. Lastly, we searched for the η and single π⁰ transitions and obtained the 90% confidence level upper limits B(Y(2S)→Y(1S)η)<0.0028 and B(Y(2S)→Y(1S)π⁰)<0.0011.

Original language	English (US)
Pages (from-to)	520041-520042+5200414-5200415
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	58
Issue number	5
State	Published - Sep 1 1998
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

Cite this

Alexander, J. P., Baker, R., Bebek, C., Berger, B. E., Berkelman, K., Bloom, K., Boisvert, V., Cassel, D. G., Crowcroft, D. S., Dickson, M., von Dombrowski, S., Drell, P. S., Ecklund, K. M., Ehrlich, R., Foland, A. D., Gaidarev, P., Galik, R. S., Gibbons, L., Gittelman, B., ... Smith, J. G. (1998). Hadronic transitions Y (2S)→Y(1S). Physical Review D - Particles, Fields, Gravitation and Cosmology, 58(5), 520041-520042+5200414-5200415.

Hadronic transitions Y (2S)→Y(1S). / Alexander, J. P.; Baker, R.; Bebek, C.; Berger, B. E.; Berkelman, K.; Bloom, K.; Boisvert, V.; Cassel, D. G.; Crowcroft, D. S.; Dickson, M.; von Dombrowski, S.; Drell, P. S.; Ecklund, K. M.; Ehrlich, R.; Foland, A. D.; Gaidarev, P.; Galik, R. S.; Gibbons, L.; Gittelman, B.; Gray, S. W.; Hartill, D. L.; Heltsley, B. K.; Hopman, P. I.; Kandaswamy, J.; Kim, P. C.; Kreinick, D. L.; Lee, T.; Liu, Y.; Mistry, N. B.; Ng, C. R.; Nordberg, E.; Ogg, M.; Patterson, J. R.; Peterson, D.; Riley, D.; Soffer, A.; Valant-Spaight, B.; Ward, C.; Athanas, M.; Avery, P.; Jones, C. D.; Lohner, M.; Patton, S.; Prescott, C.; Yelton, J.; Zheng, J.; Brandenburg, G.; Briere, R. A.; Ershov, A.; Gao, Y. S.; Kim, D. Y.J.; Wilson, R.; Yamamoto, H.; Browder, T. E.; Li, Y.; Rodriguez, J. L.; Bergfeld, T.; Eisenstein, B. I.; Ernst, J.; Gladding, G. E.; Gollin, G. D.; Hans, R. M.; Johnson, E.; Karliner, I.; Marsh, M. A.; Palmer, M.; Selen, M.; Thaler, J. J.; Edwards, K. W.; Bellerive, A.; Janicek, R.; MacFarlane, D. B.; Patel, P. M.; Sadoff, A. J.; Ammar, R.; Baringer, P.; Bean, A.; Besson, D.; Coppage, D.; Darling, C.; Davis, R.; Kotov, S.; Kravchenko, I.; Kwak, N.; Zhou, L.; Anderson, S.; Kubota, Y.; Lee, S. J.; O'Neill, J. J.; Poling, R.; Riehle, T.; Smith, A.; Alam, M. S.; Athar, S. B.; Ling, Z.; Mahmood, A. H.; Timm, S.; Wappler, F.; Anastassov, A.; Duboscq, J. E.; Fujino, D.; Gan, K. K.; Hart, T.; Honscheid, K.; Kagan, H.; Kass, R.; Lee, J.; Spencer, M. B.; Sung, M.; Undrus, A.; Wanke, R.; Wolf, A.; Zoeller, M. M.; Nemati, B.; Richichi, S. J.; Ross, W. R.; Severini, H.; Skubic, P.; Bishai, M.; Fast, J.; Hinson, J. W.; Menon, N.; Miller, D. H.; Shibata, E. I.; Shipsey, I. P.J.; Yurko, M.; Glenn, S.; Johnson, S. D.; Kwon, Y.; Roberts, S.; Thorndike, E. H.; Jessop, C. P.; Lingel, K.; Marsiske, H.; Perl, M. L.; Savinov, V.; Ugolini, D.; Wang, R.; Zhou, X.; Coan, T. E.; Fadeyev, V.; Korolkov, I.; Maravin, Y.; Narsky, I.; Shelkov, V.; Staeck, J.; Stroynowski, R.; Volobouev, I.; Ye, J.; Artuso, M.; Azfar, F.; Efimov, A.; Goldberg, M.; He, D.; Kopp, S.; Moneti, G. C.; Mountain, R.; Schuh, S.; Skwarnicki, T.; Stone, S.; Viehhauser, G.; Xing, X.; Bartelt, J.; Csorna, S. E.; Jain, V.; McLean, K. W.; Marka, S.; Godang, R.; Kinoshita, K.; Lai, I. C.; Pomianowski, P.; Schrenk, S.; Bonvicini, G.; Cinabro, D.; Greene, R.; Perera, L. P.; Zhou, G. J.; Chadha, M.; Chan, S.; Eigen, G.; Miller, J. S.; O'Grady, C.; Schmidtler, M.; Urheim, J.; Weinstein, A. J.; Würthwein, F.; Bliss, D. W.; Masek, G.; Paar, H. P.; Prell, S.; Sharma, V.; Asner, D. M.; Gronberg, J.; Hill, T. S.; Lange, D. J.; Morrison, R. J.; Nelson, H. N.; Nelson, T. K.; Roberts, D.; Ryd, A.; Balest, R.; Behrens, B. H.; Ford, W. T.; Gritsan, A.; Park, H.; Roy, J.; Smith, J. G.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 58, No. 5, 01.09.1998, p. 520041-520042+5200414-5200415.

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

Alexander, JP, Baker, R, Bebek, C, Berger, BE, Berkelman, K, Bloom, K, Boisvert, V, Cassel, DG, Crowcroft, DS, Dickson, M, von Dombrowski, S, Drell, PS, Ecklund, KM, Ehrlich, R, Foland, AD, Gaidarev, P, Galik, RS, Gibbons, L, Gittelman, B, Gray, SW, Hartill, DL, Heltsley, BK, Hopman, PI, Kandaswamy, J, Kim, PC, Kreinick, DL, Lee, T, Liu, Y, Mistry, NB, Ng, CR, Nordberg, E, Ogg, M, Patterson, JR, Peterson, D, Riley, D, Soffer, A, Valant-Spaight, B, Ward, C, Athanas, M, Avery, P, Jones, CD, Lohner, M, Patton, S, Prescott, C, Yelton, J, Zheng, J, Brandenburg, G, Briere, RA, Ershov, A, Gao, YS, Kim, DYJ, Wilson, R, Yamamoto, H, Browder, TE, Li, Y, Rodriguez, JL, Bergfeld, T, Eisenstein, BI, Ernst, J, Gladding, GE, Gollin, GD, Hans, RM, Johnson, E, Karliner, I, Marsh, MA, Palmer, M, Selen, M, Thaler, JJ, Edwards, KW, Bellerive, A, Janicek, R, MacFarlane, DB, Patel, PM, Sadoff, AJ, Ammar, R, Baringer, P, Bean, A, Besson, D, Coppage, D, Darling, C, Davis, R, Kotov, S, Kravchenko, I, Kwak, N, Zhou, L, Anderson, S, Kubota, Y, Lee, SJ, O'Neill, JJ, Poling, R, Riehle, T, Smith, A, Alam, MS, Athar, SB, Ling, Z, Mahmood, AH, Timm, S, Wappler, F, Anastassov, A, Duboscq, JE, Fujino, D, Gan, KK, Hart, T, Honscheid, K, Kagan, H, Kass, R, Lee, J, Spencer, MB, Sung, M, Undrus, A, Wanke, R, Wolf, A, Zoeller, MM, Nemati, B, Richichi, SJ, Ross, WR, Severini, H, Skubic, P, Bishai, M, Fast, J, Hinson, JW, Menon, N, Miller, DH, Shibata, EI, Shipsey, IPJ, Yurko, M, Glenn, S, Johnson, SD, Kwon, Y, Roberts, S, Thorndike, EH, Jessop, CP, Lingel, K, Marsiske, H, Perl, ML, Savinov, V, Ugolini, D, Wang, R, Zhou, X, Coan, TE, Fadeyev, V, Korolkov, I, Maravin, Y, Narsky, I, Shelkov, V, Staeck, J, Stroynowski, R, Volobouev, I, Ye, J, Artuso, M, Azfar, F, Efimov, A, Goldberg, M, He, D, Kopp, S, Moneti, GC, Mountain, R, Schuh, S, Skwarnicki, T, Stone, S, Viehhauser, G, Xing, X, Bartelt, J, Csorna, SE, Jain, V, McLean, KW, Marka, S, Godang, R, Kinoshita, K, Lai, IC, Pomianowski, P, Schrenk, S, Bonvicini, G, Cinabro, D, Greene, R, Perera, LP, Zhou, GJ, Chadha, M, Chan, S, Eigen, G, Miller, JS, O'Grady, C, Schmidtler, M, Urheim, J, Weinstein, AJ, Würthwein, F, Bliss, DW, Masek, G, Paar, HP, Prell, S, Sharma, V, Asner, DM, Gronberg, J, Hill, TS, Lange, DJ, Morrison, RJ, Nelson, HN, Nelson, TK, Roberts, D, Ryd, A, Balest, R, Behrens, BH, Ford, WT, Gritsan, A, Park, H, Roy, J & Smith, JG 1998, 'Hadronic transitions Y (2S)→Y(1S)', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 58, no. 5, pp. 520041-520042+5200414-5200415.

Alexander, J. P. ; Baker, R. ; Bebek, C. ; Berger, B. E. ; Berkelman, K. ; Bloom, K. ; Boisvert, V. ; Cassel, D. G. ; Crowcroft, D. S. ; Dickson, M. ; von Dombrowski, S. ; Drell, P. S. ; Ecklund, K. M. ; Ehrlich, R. ; Foland, A. D. ; Gaidarev, P. ; Galik, R. S. ; Gibbons, L. ; Gittelman, B. ; Gray, S. W. ; Hartill, D. L. ; Heltsley, B. K. ; Hopman, P. I. ; Kandaswamy, J. ; Kim, P. C. ; Kreinick, D. L. ; Lee, T. ; Liu, Y. ; Mistry, N. B. ; Ng, C. R. ; Nordberg, E. ; Ogg, M. ; Patterson, J. R. ; Peterson, D. ; Riley, D. ; Soffer, A. ; Valant-Spaight, B. ; Ward, C. ; Athanas, M. ; Avery, P. ; Jones, C. D. ; Lohner, M. ; Patton, S. ; Prescott, C. ; Yelton, J. ; Zheng, J. ; Brandenburg, G. ; Briere, R. A. ; Ershov, A. ; Gao, Y. S. ; Kim, D. Y.J. ; Wilson, R. ; Yamamoto, H. ; Browder, T. E. ; Li, Y. ; Rodriguez, J. L. ; Bergfeld, T. ; Eisenstein, B. I. ; Ernst, J. ; Gladding, G. E. ; Gollin, G. D. ; Hans, R. M. ; Johnson, E. ; Karliner, I. ; Marsh, M. A. ; Palmer, M. ; Selen, M. ; Thaler, J. J. ; Edwards, K. W. ; Bellerive, A. ; Janicek, R. ; MacFarlane, D. B. ; Patel, P. M. ; Sadoff, A. J. ; Ammar, R. ; Baringer, P. ; Bean, A. ; Besson, D. ; Coppage, D. ; Darling, C. ; Davis, R. ; Kotov, S. ; Kravchenko, I. ; Kwak, N. ; Zhou, L. ; Anderson, S. ; Kubota, Y. ; Lee, S. J. ; O'Neill, J. J. ; Poling, R. ; Riehle, T. ; Smith, A. ; Alam, M. S. ; Athar, S. B. ; Ling, Z. ; Mahmood, A. H. ; Timm, S. ; Wappler, F. ; Anastassov, A. ; Duboscq, J. E. ; Fujino, D. ; Gan, K. K. ; Hart, T. ; Honscheid, K. ; Kagan, H. ; Kass, R. ; Lee, J. ; Spencer, M. B. ; Sung, M. ; Undrus, A. ; Wanke, R. ; Wolf, A. ; Zoeller, M. M. ; Nemati, B. ; Richichi, S. J. ; Ross, W. R. ; Severini, H. ; Skubic, P. ; Bishai, M. ; Fast, J. ; Hinson, J. W. ; Menon, N. ; Miller, D. H. ; Shibata, E. I. ; Shipsey, I. P.J. ; Yurko, M. ; Glenn, S. ; Johnson, S. D. ; Kwon, Y. ; Roberts, S. ; Thorndike, E. H. ; Jessop, C. P. ; Lingel, K. ; Marsiske, H. ; Perl, M. L. ; Savinov, V. ; Ugolini, D. ; Wang, R. ; Zhou, X. ; Coan, T. E. ; Fadeyev, V. ; Korolkov, I. ; Maravin, Y. ; Narsky, I. ; Shelkov, V. ; Staeck, J. ; Stroynowski, R. ; Volobouev, I. ; Ye, J. ; Artuso, M. ; Azfar, F. ; Efimov, A. ; Goldberg, M. ; He, D. ; Kopp, S. ; Moneti, G. C. ; Mountain, R. ; Schuh, S. ; Skwarnicki, T. ; Stone, S. ; Viehhauser, G. ; Xing, X. ; Bartelt, J. ; Csorna, S. E. ; Jain, V. ; McLean, K. W. ; Marka, S. ; Godang, R. ; Kinoshita, K. ; Lai, I. C. ; Pomianowski, P. ; Schrenk, S. ; Bonvicini, G. ; Cinabro, D. ; Greene, R. ; Perera, L. P. ; Zhou, G. J. ; Chadha, M. ; Chan, S. ; Eigen, G. ; Miller, J. S. ; O'Grady, C. ; Schmidtler, M. ; Urheim, J. ; Weinstein, A. J. ; Würthwein, F. ; Bliss, D. W. ; Masek, G. ; Paar, H. P. ; Prell, S. ; Sharma, V. ; Asner, D. M. ; Gronberg, J. ; Hill, T. S. ; Lange, D. J. ; Morrison, R. J. ; Nelson, H. N. ; Nelson, T. K. ; Roberts, D. ; Ryd, A. ; Balest, R. ; Behrens, B. H. ; Ford, W. T. ; Gritsan, A. ; Park, H. ; Roy, J. ; Smith, J. G. / Hadronic transitions Y (2S)→Y(1S). In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 1998 ; Vol. 58, No. 5. pp. 520041-520042+5200414-5200415.

@article{97cf422e149845868fb4a6532c612ec5,

title = "Hadronic transitions Y (2S)→Y(1S)",

abstract = "Using a 73.6 pb-1 data sample of Y(2S) events collected with the CLEO II detector at the Cornell Electron Storage Ring, we have investigated the hadronic transitions between the Y(2S) and the Y(1S). The dipion transition Y(2S)→Y(1S)π+π was studied using two different analysis techniques. Selecting events in which Y(1S)→e+e-,μ+μ- ({"}exclusive{"} analysis), and using the Y(1S) leptonic branching fractions world averages from the PDG review, we obtained B(Y(2S)→Y(1S)π+π-) = 0.189±0.004±0.010, while using a method allowing Y(1S)→anything ({"}inclusive{"} analysis) we obtained B(Y(2S)→Y(1S)π+π- = 0.196 ±0.002±0.010. The appropriate weighted average of the two measurements gives B(Y(2S) →Y(1S)μ+μ-) = 0.192±0.002±0.010. Combining the exclusive and inclusive results we derive the Y(1S) leptonic branching fractions Bee = 0.0229±0.0008±0.0011 and Bμμ = 0.0249±0.0008±0.0013. We also studied Y(2S)→Y(1S)π0π0 and obtained B(Y(2S)→Y(1S)π0π0) = 0.092±0.006±0.008. Parameters of the ππ system (dipion invariant mass spectra, angular distributions) were analyzed and found to be consistent with current theoretical models. Lastly, we searched for the η and single π0 transitions and obtained the 90% confidence level upper limits B(Y(2S)→Y(1S)η)<0.0028 and B(Y(2S)→Y(1S)π0)<0.0011.",

author = "Alexander, {J. P.} and R. Baker and C. Bebek and Berger, {B. E.} and K. Berkelman and K. Bloom and V. Boisvert and Cassel, {D. G.} and Crowcroft, {D. S.} and M. Dickson and {von Dombrowski}, S. and Drell, {P. S.} and Ecklund, {K. M.} and R. Ehrlich and Foland, {A. D.} and P. Gaidarev and Galik, {R. S.} and L. Gibbons and B. Gittelman and Gray, {S. W.} and Hartill, {D. L.} and Heltsley, {B. K.} and Hopman, {P. I.} and J. Kandaswamy and Kim, {P. C.} and Kreinick, {D. L.} and T. Lee and Y. Liu and Mistry, {N. B.} and Ng, {C. R.} and E. Nordberg and M. Ogg and Patterson, {J. R.} and D. Peterson and D. Riley and A. Soffer and B. Valant-Spaight and C. Ward and M. Athanas and P. Avery and Jones, {C. D.} and M. Lohner and S. Patton and C. Prescott and J. Yelton and J. Zheng and G. Brandenburg and Briere, {R. A.} and A. Ershov and Gao, {Y. S.} and Kim, {D. Y.J.} and R. Wilson and H. Yamamoto and Browder, {T. E.} and Y. Li and Rodriguez, {J. L.} and T. Bergfeld and Eisenstein, {B. I.} and J. Ernst and Gladding, {G. E.} and Gollin, {G. D.} and Hans, {R. M.} and E. Johnson and I. Karliner and Marsh, {M. A.} and M. Palmer and M. Selen and Thaler, {J. J.} and Edwards, {K. W.} and A. Bellerive and R. Janicek and MacFarlane, {D. B.} and Patel, {P. M.} and Sadoff, {A. J.} and R. Ammar and P. Baringer and A. Bean and D. Besson and D. Coppage and C. Darling and R. Davis and S. Kotov and I. Kravchenko and N. Kwak and L. Zhou and S. Anderson and Y. Kubota and Lee, {S. J.} and O'Neill, {J. J.} and R. Poling and T. Riehle and A. Smith and Alam, {M. S.} and Athar, {S. B.} and Z. Ling and Mahmood, {A. H.} and S. Timm and F. Wappler and A. Anastassov and Duboscq, {J. E.} and D. Fujino and Gan, {K. K.} and T. Hart and K. Honscheid and H. Kagan and R. Kass and J. Lee and Spencer, {M. B.} and M. Sung and A. Undrus and R. Wanke and A. Wolf and Zoeller, {M. M.} and B. Nemati and Richichi, {S. J.} and Ross, {W. R.} and H. Severini and P. Skubic and M. Bishai and J. Fast and Hinson, {J. W.} and N. Menon and Miller, {D. H.} and Shibata, {E. I.} and Shipsey, {I. P.J.} and M. Yurko and S. Glenn and Johnson, {S. D.} and Y. Kwon and S. Roberts and Thorndike, {E. H.} and Jessop, {C. P.} and K. Lingel and H. Marsiske and Perl, {M. L.} and V. Savinov and D. Ugolini and R. Wang and X. Zhou and Coan, {T. E.} and V. Fadeyev and I. Korolkov and Y. Maravin and I. Narsky and V. Shelkov and J. Staeck and R. Stroynowski and I. Volobouev and J. Ye and M. Artuso and F. Azfar and A. Efimov and M. Goldberg and D. He and S. Kopp and Moneti, {G. C.} and R. Mountain and S. Schuh and T. Skwarnicki and S. Stone and G. Viehhauser and X. Xing and J. Bartelt and Csorna, {S. E.} and V. Jain and McLean, {K. W.} and S. Marka and R. Godang and K. Kinoshita and Lai, {I. C.} and P. Pomianowski and S. Schrenk and G. Bonvicini and D. Cinabro and R. Greene and Perera, {L. P.} and Zhou, {G. J.} and M. Chadha and S. Chan and G. Eigen and Miller, {J. S.} and C. O'Grady and M. Schmidtler and J. Urheim and Weinstein, {A. J.} and F. W{\"u}rthwein and Bliss, {D. W.} and G. Masek and Paar, {H. P.} and S. Prell and V. Sharma and Asner, {D. M.} and J. Gronberg and Hill, {T. S.} and Lange, {D. J.} and Morrison, {R. J.} and Nelson, {H. N.} and Nelson, {T. K.} and D. Roberts and A. Ryd and R. Balest and Behrens, {B. H.} and Ford, {W. T.} and A. Gritsan and H. Park and J. Roy and Smith, {J. G.}",

year = "1998",

month = sep,

day = "1",

language = "English (US)",

volume = "58",

pages = "520041--520042+5200414--5200415",

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

issn = "1550-7998",

publisher = "American Institute of Physics Publising LLC",

number = "5",

}

TY - JOUR

T1 - Hadronic transitions Y (2S)→Y(1S)

AU - Alexander, J. P.

AU - Baker, R.

AU - Bebek, C.

AU - Berger, B. E.

AU - Berkelman, K.

AU - Bloom, K.

AU - Boisvert, V.

AU - Cassel, D. G.

AU - Crowcroft, D. S.

AU - Dickson, M.

AU - von Dombrowski, S.

AU - Drell, P. S.

AU - Ecklund, K. M.

AU - Ehrlich, R.

AU - Foland, A. D.

AU - Gaidarev, P.

AU - Galik, R. S.

AU - Gibbons, L.

AU - Gittelman, B.

AU - Gray, S. W.

AU - Hartill, D. L.

AU - Heltsley, B. K.

AU - Hopman, P. I.

AU - Kandaswamy, J.

AU - Kim, P. C.

AU - Kreinick, D. L.

AU - Lee, T.

AU - Liu, Y.

AU - Mistry, N. B.

AU - Ng, C. R.

AU - Nordberg, E.

AU - Ogg, M.

AU - Patterson, J. R.

AU - Peterson, D.

AU - Riley, D.

AU - Soffer, A.

AU - Valant-Spaight, B.

AU - Ward, C.

AU - Athanas, M.

AU - Avery, P.

AU - Jones, C. D.

AU - Lohner, M.

AU - Patton, S.

AU - Prescott, C.

AU - Yelton, J.

AU - Zheng, J.

AU - Brandenburg, G.

AU - Briere, R. A.

AU - Ershov, A.

AU - Gao, Y. S.

AU - Kim, D. Y.J.

AU - Wilson, R.

AU - Yamamoto, H.

AU - Browder, T. E.

AU - Li, Y.

AU - Rodriguez, J. L.

AU - Bergfeld, T.

AU - Eisenstein, B. I.

AU - Ernst, J.

AU - Gladding, G. E.

AU - Gollin, G. D.

AU - Hans, R. M.

AU - Johnson, E.

AU - Karliner, I.

AU - Marsh, M. A.

AU - Palmer, M.

AU - Selen, M.

AU - Thaler, J. J.

AU - Edwards, K. W.

AU - Bellerive, A.

AU - Janicek, R.

AU - MacFarlane, D. B.

AU - Patel, P. M.

AU - Sadoff, A. J.

AU - Ammar, R.

AU - Baringer, P.

AU - Bean, A.

AU - Besson, D.

AU - Coppage, D.

AU - Darling, C.

AU - Davis, R.

AU - Kotov, S.

AU - Kravchenko, I.

AU - Kwak, N.

AU - Zhou, L.

AU - Anderson, S.

AU - Kubota, Y.

AU - Lee, S. J.

AU - O'Neill, J. J.

AU - Poling, R.

AU - Riehle, T.

AU - Smith, A.

AU - Alam, M. S.

AU - Athar, S. B.

AU - Ling, Z.

AU - Mahmood, A. H.

AU - Timm, S.

AU - Wappler, F.

AU - Anastassov, A.

AU - Duboscq, J. E.

AU - Fujino, D.

AU - Gan, K. K.

AU - Hart, T.

AU - Honscheid, K.

AU - Kagan, H.

AU - Kass, R.

AU - Lee, J.

AU - Spencer, M. B.

AU - Sung, M.

AU - Undrus, A.

AU - Wanke, R.

AU - Wolf, A.

AU - Zoeller, M. M.

AU - Nemati, B.

AU - Richichi, S. J.

AU - Ross, W. R.

AU - Severini, H.

AU - Skubic, P.

AU - Bishai, M.

AU - Fast, J.

AU - Hinson, J. W.

AU - Menon, N.

AU - Miller, D. H.

AU - Shibata, E. I.

AU - Shipsey, I. P.J.

AU - Yurko, M.

AU - Glenn, S.

AU - Johnson, S. D.

AU - Kwon, Y.

AU - Roberts, S.

AU - Thorndike, E. H.

AU - Jessop, C. P.

AU - Lingel, K.

AU - Marsiske, H.

AU - Perl, M. L.

AU - Savinov, V.

AU - Ugolini, D.

AU - Wang, R.

AU - Zhou, X.

AU - Coan, T. E.

AU - Fadeyev, V.

AU - Korolkov, I.

AU - Maravin, Y.

AU - Narsky, I.

AU - Shelkov, V.

AU - Staeck, J.

AU - Stroynowski, R.

AU - Volobouev, I.

AU - Ye, J.

AU - Artuso, M.

AU - Azfar, F.

AU - Efimov, A.

AU - Goldberg, M.

AU - He, D.

AU - Kopp, S.

AU - Moneti, G. C.

AU - Mountain, R.

AU - Schuh, S.

AU - Skwarnicki, T.

AU - Stone, S.

AU - Viehhauser, G.

AU - Xing, X.

AU - Bartelt, J.

AU - Csorna, S. E.

AU - Jain, V.

AU - McLean, K. W.

AU - Marka, S.

AU - Godang, R.

AU - Kinoshita, K.

AU - Lai, I. C.

AU - Pomianowski, P.

AU - Schrenk, S.

AU - Bonvicini, G.

AU - Cinabro, D.

AU - Greene, R.

AU - Perera, L. P.

AU - Zhou, G. J.

AU - Chadha, M.

AU - Chan, S.

AU - Eigen, G.

AU - Miller, J. S.

AU - O'Grady, C.

AU - Schmidtler, M.

AU - Urheim, J.

AU - Weinstein, A. J.

AU - Würthwein, F.

AU - Bliss, D. W.

AU - Masek, G.

AU - Paar, H. P.

AU - Prell, S.

AU - Sharma, V.

AU - Asner, D. M.

AU - Gronberg, J.

AU - Hill, T. S.

AU - Lange, D. J.

AU - Morrison, R. J.

AU - Nelson, H. N.

AU - Nelson, T. K.

AU - Roberts, D.

AU - Ryd, A.

AU - Balest, R.

AU - Behrens, B. H.

AU - Ford, W. T.

AU - Gritsan, A.

AU - Park, H.

AU - Roy, J.

AU - Smith, J. G.

PY - 1998/9/1

Y1 - 1998/9/1

N2 - Using a 73.6 pb-1 data sample of Y(2S) events collected with the CLEO II detector at the Cornell Electron Storage Ring, we have investigated the hadronic transitions between the Y(2S) and the Y(1S). The dipion transition Y(2S)→Y(1S)π+π was studied using two different analysis techniques. Selecting events in which Y(1S)→e+e-,μ+μ- ("exclusive" analysis), and using the Y(1S) leptonic branching fractions world averages from the PDG review, we obtained B(Y(2S)→Y(1S)π+π-) = 0.189±0.004±0.010, while using a method allowing Y(1S)→anything ("inclusive" analysis) we obtained B(Y(2S)→Y(1S)π+π- = 0.196 ±0.002±0.010. The appropriate weighted average of the two measurements gives B(Y(2S) →Y(1S)μ+μ-) = 0.192±0.002±0.010. Combining the exclusive and inclusive results we derive the Y(1S) leptonic branching fractions Bee = 0.0229±0.0008±0.0011 and Bμμ = 0.0249±0.0008±0.0013. We also studied Y(2S)→Y(1S)π0π0 and obtained B(Y(2S)→Y(1S)π0π0) = 0.092±0.006±0.008. Parameters of the ππ system (dipion invariant mass spectra, angular distributions) were analyzed and found to be consistent with current theoretical models. Lastly, we searched for the η and single π0 transitions and obtained the 90% confidence level upper limits B(Y(2S)→Y(1S)η)<0.0028 and B(Y(2S)→Y(1S)π0)<0.0011.

AB - Using a 73.6 pb-1 data sample of Y(2S) events collected with the CLEO II detector at the Cornell Electron Storage Ring, we have investigated the hadronic transitions between the Y(2S) and the Y(1S). The dipion transition Y(2S)→Y(1S)π+π was studied using two different analysis techniques. Selecting events in which Y(1S)→e+e-,μ+μ- ("exclusive" analysis), and using the Y(1S) leptonic branching fractions world averages from the PDG review, we obtained B(Y(2S)→Y(1S)π+π-) = 0.189±0.004±0.010, while using a method allowing Y(1S)→anything ("inclusive" analysis) we obtained B(Y(2S)→Y(1S)π+π- = 0.196 ±0.002±0.010. The appropriate weighted average of the two measurements gives B(Y(2S) →Y(1S)μ+μ-) = 0.192±0.002±0.010. Combining the exclusive and inclusive results we derive the Y(1S) leptonic branching fractions Bee = 0.0229±0.0008±0.0011 and Bμμ = 0.0249±0.0008±0.0013. We also studied Y(2S)→Y(1S)π0π0 and obtained B(Y(2S)→Y(1S)π0π0) = 0.092±0.006±0.008. Parameters of the ππ system (dipion invariant mass spectra, angular distributions) were analyzed and found to be consistent with current theoretical models. Lastly, we searched for the η and single π0 transitions and obtained the 90% confidence level upper limits B(Y(2S)→Y(1S)η)<0.0028 and B(Y(2S)→Y(1S)π0)<0.0011.

UR - http://www.scopus.com/inward/record.url?scp=0542371314&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0542371314&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0542371314

VL - 58

SP - 520041-520042+5200414-5200415

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 1550-7998

IS - 5

ER -

Hadronic transitions Y (2S)→Y(1S)

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