Using the Crystal Ball detector operating at the DORIS II storage ring we have measured the leptonic partial widths Fee of the Y(1S) and Y(2S) resonances. We find Gamma-ee(Y(1S)) = 1.34+-0.03+-0.06 keV andGamma-ee(Y(2S)) = 0.56+-0.04+-0.02 keV.The effect on Gamma-ee of applying different prescriptions for radiative corrections is discussed. W e also measure R, the ratio of non-resonant hadronic cross section to the Born cross section of mu pair production, at c.m. energy W = 9 . 3 9 G e V to beR=3.48+-0.04+-0.16.
Determination of Gamma-ee of the Upsilon(1S) and Upsilon(2S) Resonances, and Measurement of R At W = 9.39 GeV / Z., Jakubowski; D., Antreasyan; H. W., Bartels; D., Besset; C., Bieler; J. K., Bienlein; Bizzeti, Andrea; E. D., Bloom; I., Brock; K., Brockmuller; R., Cabenda; A., Cartacci; M., Cavallisforza; R., Clare; A., Compagnucci; G., Conforto; R., Cowan; D., Coyne; G., Drews; A., Engler; K., Fairfield; G., Folger; A., Fridman; J., Gaiser; D., Gelphman; G., Glaser; G., Godfrey; K., Graaf; F. H., Heimlich; F. H., Heinsius; R., Hofstadter; J., Irion; H., Janssen; K., Karch; S., Keh; T., Kiel; H., Kilian; I., Kirkbride; T., Kloiber; M., Kobel; W., Koch; A. C., Konig; K., Konigsmann; R. W., Kraemer; S., Kruger; G., Landi; R., Lee; S., Leffler; R., Lekebusch; A. M., Litke; W., Lockmann; S., Lowe; B., Lurz; D., Marlow; H., Marsiske; W., Maschmann; P., Mcbride; H., Meyer; B., Muryn; F., Messing; W. J., Metzger; B., Monteleoni; R., Nernst; B., Niczyporuk; G., Nowak; C., Peck; C., Pegel; P. G., Pelfer; B., Pollock; C., Pols; F. C., Porter; D., Prindle; P., Ratoff; M., Reidenbach; B., Renger; C., Rippich; M., Scheer; P., Schmitt; J., Schotanus; J., Schutte; A., Schwarz; F., Selonke; D., Sievers; T., Skwarnicki; V., Stock; K., Strauch; U., Strohbusch; J., Tompkins; H. J., Trost; B., Vanuitert; R. T., Vandewalle; H., Vogel; A., Voigt; U., Volland; K., Wachs; K., Wacker; W., Walk; H., Wegener; D., Williams; P., Zschorsch. - In: ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS. - ISSN 0170-9739. - STAMPA. - 40:(1988), pp. 49-61. [10.1007/BF01559717]
Determination of Gamma-ee of the Upsilon(1S) and Upsilon(2S) Resonances, and Measurement of R At W = 9.39 GeV.
BIZZETI, Andrea;
1988
Abstract
Using the Crystal Ball detector operating at the DORIS II storage ring we have measured the leptonic partial widths Fee of the Y(1S) and Y(2S) resonances. We find Gamma-ee(Y(1S)) = 1.34+-0.03+-0.06 keV andGamma-ee(Y(2S)) = 0.56+-0.04+-0.02 keV.The effect on Gamma-ee of applying different prescriptions for radiative corrections is discussed. W e also measure R, the ratio of non-resonant hadronic cross section to the Born cross section of mu pair production, at c.m. energy W = 9 . 3 9 G e V to beR=3.48+-0.04+-0.16.Pubblicazioni consigliate
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