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.
| 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 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
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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
}
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 -