Search for charmonium and charmoniumlike states in {Upsilon}(2S) radiative decays

Journal Article · Sat Oct 01 04:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.84.071107· OSTI ID:21607733

Wang, X L; Yuan, C Z; Wang, P ^[1]; Shen, C P; Hayasaka, K; Iijima, T; Miyazaki, Y; Ohshima, T; Senyo, K; Seon, O ^[2]; Adachi, I; Haba, J; Itoh, R; Iwasaki, Y; Katayama, N; Kichimi, H; Nakao, M; Nishida, S; Sakai, Y; Trabelsi, K ^[3]

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1. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing (China)
2. Nagoya University, Nagoya (Japan)
3. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)

Using a sample of 158x10{sup 6} {Upsilon}(2S) events collected with the Belle detector, charmonium and charmoniumlike states with even charge parity are searched for in {Upsilon}(2S) radiative decays. No significant {chi}{sub cJ} or {eta}{sub c} signal is observed, and the following upper limits at 90% confidence level (C. L.) are obtained: B({Upsilon}(2S){yields}{gamma}{chi}{sub c0})<1.0x10{sup -4}, B({Upsilon}(2S){yields}{gamma}{chi}{sub c1})<3.6x10{sup -6}, B({Upsilon}(2S){yields}{gamma}{chi}{sub c2})<1.5x10{sup -5}, and B({Upsilon}(2S){yields}{gamma}{eta}{sub c})<2.7x10{sup -5}. No significant signal of any charmoniumlike state is observed, and we obtain the limits B({Upsilon}(2S){yields}{gamma}X(3872))xB(X(3872){yields}{pi}{sup +}{pi}{sup -}J/{psi})<0.8x10{sup -6}, B({Upsilon}(2S){yields}{gamma}X(3872))x B(X(3872){yields}{pi}{sup +}{pi}{sup -}{pi}{sup 0}J/{psi})<2.4x10{sup -6}, B({Upsilon}(2S){yields}{gamma}X(3915))xB(X(3915){yields}{omega}J/{psi})<2.8x10{sup -6}, B({Upsilon}(2S){yields}{gamma}Y(4140))xB(Y(4140){yields}{phi}J/{psi}))<1.2x10{sup -6}, and B({Upsilon}(2S){yields}{gamma}X(4350))xB(X(4350){yields}{phi}J/{psi}))<1.3x10{sup -6} at 90% C. L.

• OSTI ID: 21607733
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 84; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
BARYONS
BEAUTY MESONS
BEAUTY PARTICLES
BOSONS
CHARMONIUM
DECAY
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ETA MESONS
FERMIONS
GAMMA RADIATION
HADRONS
HYPERONS
IONIZING RADIATIONS
MESONS
OMEGA BARYONS
OMEGA PARTICLES
PARITY
PARTICLE DECAY
PARTICLE PROPERTIES
PIONS
PIONS MINUS
PIONS PLUS
PSEUDOSCALAR MESONS
QUARKONIUM
RADIATIONS
RADIATIVE DECAY
STRANGE PARTICLES
VECTOR MESONS