Measurement of the direct photon spectrum in Y(1S) decays
- Nemati, B
- Richichi, SJ
- Ross, WR
- Skubic, P
- Wood, M
- Bishai, M
- Fast, J
- Gerndt, E
- Hinson, JW
- Menon, N
- Miller, DH
- Shibata, EI
- Shipsey, IPJ
- Yurko, M
- Gibbons, L
- Johnson, SD
- Kwon, Y
- Roberts, S
- Thorndike, EH
- Jessop, CP
- Lingel, K
- Marsiske, H
- Perl, ML
- Schaffner, SF
- 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
- Efimov, A
- Frasconi, F
- Gao, M
- Goldberg, M
- He, D
- Kopp, S
- Moneti, GC
- Mountain, R
- Mukhin, Y
- Schuh, S
- Skwarnicki, T
- Stone, S
- Viehhauser, G
- Xing, X
- Bartelt, J
- Csorna, SE
- Jain, V
- Marka, S
- Freyberger, A
- Gibaut, D
- Godang, R
- Kinoshita, K
- Lai, IC
- Pomianowski, P
- Schrenk, S
- Bonvicini, G
- Cinabro, D
- Greene, R
- Perera, LP
- Barish, B
- Chadha, M
- Chan, S
- Eigen, G
- Miller, JS
- OGrady, C
- Schmidtler, M
- Urheim, J
- Weinstein, AJ
- Wurthwein, F
- Asner, DM
- Bliss, DW
- Brower, WS
- Masek, G
- Paar, HP
- Sivertz, M
- Sharma, V
- Gronberg, J
- Kutschke, R
- Lange, DJ
- Menary, S
- Morrison, RJ
- Nelson, HN
- Nelson, TK
- Qiao, C
- Richman, JD
- Roberts, D
- Ryd, A
- Witherell, MS
- Balest, R
- Behrens, BH
- Cho, K
- Ford, WT
- Park, H
- Rankin, P
- Roy, J
- Smith, JG
- Alexander, JP
- Bebek, C
- Berger, BE
- Berkelman, K
- Bloom, K
- Casse, DG
- Cho, HA
- Coffman, DM
- Crowcroft, DS
- Dickson, M
- Drell, PS
- Ecklund, KM
- Ehrlich, R
- Elia, R
- Foland, AD
- Gaidarev, P
- Galik, RS
- Gittelman, B
- Gray, SW
- Hartill, DL
- Heltsley, BK
- Hopman, PI
- Kandaswamy, J
- Katayama, N
- Kim, PC
- Kreinick, DL
- Lee, T
- Liu, Y
- Ludwig, GS
- Masui, J
- Mevissen, J
- Mistry, NB
- Ng, CR
- Nordberg, E
- Ogg, M
- Patterson, JR
- Peterson, D
- Riley, D
- Soffer, A
- Ward, C
- Athanas, M
- Avery, P
- Jones, CD
- Loner, M
- Prescott, C
- Yang, S
- Yelton, J
- Zheng, J
- Brandenburg, G
- Briere, RA
- Gao, YS
- Kim, DYJ
- Wilson, R
- Yamamoto, H
- Browder, TE
- Li, F
- Li, Y
- Rodriguez, JL
- Bergfeld, T
- Eisenstein, BI
- Ernst, I
- Gladding, GE
- Gollin, CD
- Hans, RM
- Johnson, E
- Karliner, I
- Marsh, MA
- Palmer, M
- Selen, M
- Thaler, JJ
- Edwards, KW
- Bellerive, A
- Janicek, R
- MacFarlane, DB
- McLean, KW
- Patel, PR
- Sadoff, AJ
- Ammar, R
- Baringer, P
- Bean, A
- Besson, D
- Coppage, D
- Darling, C
- Davis, R
- Hancock, N
- Kotov, S
- Kravchenko, I
- Kwak, N
- Anderson, S
- Kubota, Y
- Lattery, H
- ONeill, JJ
- Patton, S
- Poling, R
- Riehle, T
- Savinov, V
- Smith, A
- Alam, MS
- Athar, SB
- Ling, Z
- Mahmood, AH
- Severini, H
- Timm, S
- Wappler, F
- Anastassov, A
- Blinov, S
- Duboscq, JE
- Fisher, KD
- Fujino, D
- Fulton, R
- Gan, KK
- Hart, T
- Honscheid, K
- Kagan, H
- Kass, R
- Lee, J
- Spencer, MB
- Sung, M
- Undrus, A
- Wanke, R
- Wolf, A
- Zoeller, MR
Publication date
May 1997
DOI Publisher
American Physical Society (APS) Journal
0556-2821Abstract
Using data taken with the CLEO II detector at the Cornell Electron Storage Ring, we have determined the ratio of branching fractions: Rγ≡Γ(Y(1S)→γgg)/Γ(Y(1S)→ggg)=[2. 75±0.04(stat)±0.15(syst)]%. From this ratio, we have determined the QCD scale parameter ΛMS(defined in the modified minimal subtraction scheme) to be ΛMS=233±11±59 MeV, from which we determine a value for the strong coupling constant αs(MY(1S))=0.163±0.002±0.014, or αs(MZ)=0.110±0.001±0.007
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