Jia, S and Shen, C P and Yuan, C Z and Adachi, I and Ahn, J K and Aihara, H and Al Said, S and Asner, D M and Atmacan, H and Aushev, T and Ayad, R and Babu, V and Badhrees, I and Bahinipati, S and Bakich, A M and Bansal, V and Behera, P and Berger, M and Bhardwaj, V and Bhuyan, B and Biswal, J and Bonvicini, G and Bozek, A and Bračko, M and Browder, T E and Červenkov, D and Chang, M C and Chekelian, V. and Chen, A. and Cheon, B. G. and Chilikin, K. and Cho, K. and Choi, S.-K. and Choi, Y. and Cinabro, D. and Czank, T. and Dash, N. and Di Carlo, S. and Doležal, Z. and Dutta, D. and Eidelman, S. and Epifanov, D. and Fast, J. E. and Ferber, T. and Fulsom, B. G. and Garg, R. and Gaur, V. and Gabyshev, N. and Garmash, A. and Gelb, M. and Giri, Anjan Kumar
(2017)
Search for light tetraquark states in ϒ(1S) and ϒ(2S) decays.
Physical Review D, 96 (11).
pp. 1-14.
ISSN 2470-0010
Abstract
We search for the JPC=0−− and 1+− light tetraquark states with masses up to 2.46 GeV/c2 in Υ(1S) and Υ(2S) decays with data samples of (102±2) million and (158±4) million events, respectively, collected with the Belle detector. No significant signals are observed in any of the studied production modes, and 90% credibility level (C.L.) upper limits on their branching fractions in Υ(1S) and Υ(2S) decays are obtained. The inclusive branching fractions of the Υ(1S) and Υ(2S) decays into final states with f1(1285) are measured to be B(Υ(1S)→f1(1285)+anything)=(46±28(stat)±13(syst))×10−4 and B(Υ(2S)→f1(1285)+anything)=(22±15(stat)±6.3(syst))×10−4. The measured χb2→J/ψ+anything branching fraction is measured to be (1.50±0.34(stat)±0.22(syst))×10−3, and 90% C.L. upper limits for the χb0,b1→J/ψ+anything branching fractions are found to be 2.3×10−3 and 1.1×10−3, respectively. For B(χb1→ω+anything), the branching fraction is measured to be (4.9±1.3(stat)±0.6(syst))×10−2. All results reported here are the first
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