Evidence for the h{sub b}(1P) meson in the decay {Upsilon}(3S){yields}{pi}{sup 0}h{sub b}(1P)

Journal Article · Tue Nov 01 00:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.84.091101· OSTI ID:21607983

Lees, J P; Poireau, V; Prencipe, E; Tisserand, V ^[1]; Garra Tico, J; Grauges, E ^[2]; Martinelli, M; Milanes, D A; Palano, A; Pappagallo, M ^[3]; Eigen, G; Stugu, B; Sun, L ^[4]; Brown, D N; Kerth, L T; Kolomensky, Yu G; Lynch, G; Osipenkov, I L ^[5]; Koch, H; Schroeder, T ^[6]

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1. Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Universite de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux (France)
2. Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
3. INFN Sezione di Baria, I-70126 Bari (Italy)
4. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
5. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)
6. Ruhr Universitaet Bochum, Institut fuer Experimentalphysik 1, D-44780 Bochum (Germany)

Using a sample of 122x10{sup 6} {Upsilon}(3S) events recorded with the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} collider at SLAC, we search for the h{sub b}(1P) spin-singlet partner of the P-wave {chi}{sub bJ}(1P) states in the sequential decay {Upsilon}(3S){yields}{pi}{sup 0}h{sub b}(1P), h{sub b}(1P){yields}{gamma}{eta}{sub b}(1S). We observe an excess of events above background in the distribution of the recoil mass against the {pi}{sup 0} at mass 9902{+-}4(stat){+-}2(syst) MeV/c{sup 2}. The width of the observed signal is consistent with experimental resolution, and its significance is 3.1{sigma}, including systematic uncertainties. We obtain the value (4.3{+-}1.1(stat){+-}0.9(syst))x10{sup -4} for the product branching fraction B({Upsilon}(3S){yields}{pi}{sup 0}h{sub b})xB(h{sub b{yields}{gamma}{eta}b}).

• OSTI ID: 21607983
• Journal Information: Physical Review. D, Particles Fields, Vol. 84, Issue 9; Other Information: DOI: 10.1103/PhysRevD.84.091101; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

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