Details

Autor(en) / Beteiligte

• ADAMS, G. S
• CHASSE, M
• THORNDIKE, E. H
• COAN, T. E
• GAO, Y. S
• LIU, F
• STROYNOWSKI, R
• ARTUSO, M
• BOULAHOUACHE, C
• BLUSK, S
• BUTT, J
• DAMBASUREN, E
• CRAVEY, M
• DORJKHAIDAV, O
• MENAA, N
• MOUNTAIN, R
• MURAMATSU, H
• NANDAKUMAR, R
• REDJIMI, R
• SIA, R
• SKWARNICKI, T
• STONE, S
• WANG, J. C
• CUMMINGS, J. P
• ZHANG, K
• CSORNA, S. E
• BONVICINI, G
• CINABRO, D
• DUBROVIN, M
• BORNHEIM, A
• PAPPAS, S. P
• WEINSTEIN, A. J
• BRIERE, R. A
• CHEN, G. P
• DANKO, I
• FERGUSON, T
• TATISHVILI, G
• VOGEL, H
• WATKINS, M. E
• ADAM, N. E
• ALEXANDER, J. P
• BERKELMAN, K
• CASSEL, D. G
• DUBOSCQ, J. E
• ECKLUND, K. M
• NAPOLITANO, J
• EHRLICH, R
• FIELDS, L
• GALIK, R. S
• GIBBONS, L
• GITTELMAN, B
• GRAY, R
• GRAY, S. W
• HARTILL, D. L
• HELTSLEY, B. K
• HERTZ, D
• CRONIN-HENNESSY, D
• PARK, C. S
• PARK, W
• THAYER, J. B

Titel

Measurement of the muonic branching fractions of the narrow upsilon resonances

Ist Teil von

• Physical review letters, 2005-01, Vol.94 (1), p.012001.1-012001.5, Article 012001

Ort / Verlag

Ridge, NY: American Physical Society

Erscheinungsjahr

2005

Link zum Volltext

Quelle

PROLA

Beschreibungen/Notizen

• The decay branching fractions of the three narrow Upsilon resonances to mu(+)mu(-) have been measured by analyzing about 4.3 fb(-1) e(+)e(-) data collected with the CLEO III detector. The branching fraction B(Upsilon(1S)-->mu(+)mu(-))=(2.49+/-0.02+/-0.07)% is consistent with the current world average, but B(Upsilon(2S)-->mu(+)mu(-))=(2.03+/-0.03+/-0.08)% and B(Upsilon(3S)-->mu(+)mu(-))=(2.39+/-0.07+/-0.10)% are significantly larger than prior results. These new muonic branching fractions imply a narrower total decay width for the Upsilon(2S) and Upsilon(3S) resonances and lower other branching fractions that rely on these decays in their determination.