Search for charmonium and charmoniumlike states in {Upsilon}(1S) radiative decays

Journal Article · Wed Sep 01 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.051504· OSTI ID:21432937

Shen, C P ^[1]; Wang, X L; Yuan, C Z; Wang, P; Shang, L; Zhang, C C ^[1]; Adachi, I; Haba, J; Itoh, R; Iwasaki, Y; Kichimi, H; Nakao, M; Nishida, S; Sakai, Y; Uno, S; Yamauchi, M ^[2]; Aihara, H ^[3]; Aushev, T ^[4]; Bakich, A M; McOnie, S ^[5]

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1. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing (China)
2. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)
3. Department of Physics, University of Tokyo, Tokyo (Japan)
4. Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne (Switzerland)
5. School of Physics, University of Sydney, NSW 2006 (Australia)

Using a sample of 102x10{sup 6} {Upsilon}(1S) events collected with the Belle detector, we report on the first search for charge-parity-even charmonium and charmoniumlike states in {Upsilon}(1S) radiative decays. No significant {chi}{sub cJ} or {eta}{sub c} signal is observed and 90% C.L. limits on B({Upsilon}(1S){yields}{gamma}{chi}{sub c0})<6.5x10{sup -4}, B({Upsilon}(1S){yields}{gamma}{chi}{sub c1})<2.3x10{sup -5}, B({Upsilon}(1S){yields}{gamma}{chi}{sub c2})<7.6x10{sup -6}, and B({Upsilon}(1S){yields}{gamma}{eta}{sub c})<5.7x10{sup -5} are obtained. The product branching fraction limits B({Upsilon}(1S){yields}{gamma}X(3872))B(X(3872){yields}{pi}{sup +}{pi}{sup -}{pi}{sup +}{pi}{sup -}J/{psi})<1.6x10{sup -6}, B({Upsilon}(1S){yields}{gamma}X(3872))B(X(3872){yields}{pi}{sup +}{pi}{sup -}{pi}{sup 0}J/{psi})<2.8x10{sup -6}, B({Upsilon}(1S){yields}{gamma}X(3915)) B(X(3915){yields}{omega}J/{psi})<3.0x10{sup -6}, and B({Upsilon}(1S){yields}{gamma}Y(4140))B(Y(4140){yields}{phi}J/{psi})<2.2x10{sup -6} are obtained at the 90% C.L. Furthermore, no evidence is found for excited charmonium states below 4.8 GeV/c{sup 2}.

• OSTI ID: 21432937
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 5; Other Information: DOI: 10.1103/PhysRevD.82.051504; (c) 2010 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
CHARMONIUM
GEV RANGE
J PSI-3097 MESONS
PARITY
PIONS MINUS
RADIATIVE DECAY
BOSONS
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
ENERGY RANGE
HADRONS
MESONS
PARTICLE DECAY
PARTICLE PROPERTIES
PIONS
PSEUDOSCALAR MESONS
QUARKONIUM
VECTOR MESONS