{Upsilon}(1S){yields}{gamma}f{sub 2}{sup '}(1525); f{sub 2}{sup '}(1525){yields}K{sub S}{sup 0}K{sub S}{sup 0} decays

Journal Article · Tue Feb 01 00:00:00 EST 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.037101· OSTI ID:21504934

Besson, D; Hogan, D P ^[1]; Pedlar, T K ^[2]; Cronin-Hennessy, D; Hietala, J; Zweber, P ^[3]; Dobbs, S; Metreveli, Z; Seth, K K; Tomaradze, A; Xiao, T ^[4]; Brisbane, S; Martin, L; Powell, A; Spradlin, P; Wilkinson, G ^[5]; Mendez, H ^[6]; Ge, J Y; Miller, D H; Shipsey, I P. J. ^[7]

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1. University of Kansas, Lawrence, Kansas 66045 (United States)
2. Luther College, Decorah, Iowa 52101 (United States)
3. University of Minnesota, Minneapolis, Minnesota 55455 (United States)
4. Northwestern University, Evanston, Illinois 60208 (United States)
5. University of Oxford, Oxford OX1 3RH (United Kingdom)
6. University of Puerto Rico, Mayaguez, 00681 (Puerto Rico)
7. Purdue University, West Lafayette, Indiana 47907 (United States)

We report on a study of exclusive radiative decays of the {Upsilon}(1S) resonance into a final state consisting of a photon and two K{sub S}{sup 0} candidates. We find evidence for a signal for {Upsilon}(1S){yields}{gamma}f{sub 2}{sup '}(1525); f{sub 2}{sup '}(1525){yields}{gamma}K{sub S}{sup 0}K{sub S}{sup 0}, at a rate B({Upsilon}(1S){yields}{gamma}f{sub 2}{sup '}(1525))=(4.0{+-}1.3{+-}0.6)x10{sup -5}, consistent with previous observations of {Upsilon}(1S){yields}{gamma}f{sub 2}{sup '}(1525); f{sub 2}{sup '}(1525){yields}K{sup +}K{sup -}, and isospin. Combining this branching fraction with existing branching fraction measurements of {Upsilon}(1S){yields}{gamma}f{sub 2}{sup '}(1525) and J/{psi}{yields}{gamma}f{sub 2}{sup '}(1525), we obtain the ratio of branching fractions: B({Upsilon}(1S){yields}{gamma}f{sub 2}{sup '}(1525))/B(J/{psi}{yields}{gamma}f{sub 2}{sup '}(1525))=0.09{+-}0.02, approximately consistent with expectations based on soft-collinear effective theory.

• OSTI ID: 21504934
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 3; Other Information: DOI: 10.1103/PhysRevD.83.037101; (c) 2011 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
F2 PRIME-1525 MESONS
ISOSPIN
KAONS MINUS
KAONS NEUTRAL SHORT-LIVED
PARTICLE DECAY
PHOTONS
RADIATIVE DECAY
RESONANCE
VECTOR MESONS
BOSONS
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
HADRONS
KAONS
KAONS NEUTRAL
MASSLESS PARTICLES
MESONS
PARTICLE PROPERTIES
PSEUDOSCALAR MESONS
QUARKONIUM
STRANGE MESONS
STRANGE PARTICLES
STRANGEONIUM
TENSOR MESONS