Study of di-pion Bottomonium Transitions and Search for the h_b(1P) State

Journal Article · Fri Dec 09 00:00:00 EST 2011 · Phys.Rev.D84:011104,2011

DOI:https://doi.org/10.1103/PhysRevD.84.011104· OSTI ID:1015605

Lees, J P; Poireau, V; Tisserand, V; Garra Tico, J; Grauges, E; Martinelli, M; Milanes, D A; Palano, A; Pappagallo, M; Eigen, G; Stugu, B; Sun, L; Brown, D N; Kerth, L T; Kolomensky, Yu G; Lynch, G; Koch, H; Schroeder, T; Asgeirsson, D J; Hearty, C ; Mattison, T S

We study inclusive di-pion decays using a sample of 108 x 10{sup 6} {Upsilon}(3S) events recorded with the BABAR detector. We search for the decay mode {Upsilon}(3S) {yields} {pi}{sup +}{pi}{sup -}h{sub b} (1P) and find no evidence for the bottomonium spin-singlet state h{sub b}(1P) in the invariant mass distribution recoiling against the {pi}{sup +}{pi}{sup -} system. Assuming the h{sub b}(1P) mass to be 9.900 GeV/c{sup 2}, we measure the upper limit on the branching fraction {Beta}[{Upsilon}(3S) {yields} {pi}{sup +}{pi}{sup -}h{sub b}(1P)] < 1.2 x 10{sup -4}, at 90% confidence level. We also investigate the {chi}{sub bJ}(2P) {yields} {pi}{sup +}{pi}{sup -} {chi}{sub bJ}(1P), {Upsilon}(3S) {yields} {pi}{sup +}{pi}{sup -}{Upsilon}(2S), and {Upsilon}(2S) {yields} {pi}{sup +}{pi}{sup -}{Upsilon}(1S) di-pion transitions and present an improved measurement of the branching fraction of the {Upsilon}(3S) {yields} {pi}{sup +}{pi}{sup -}{Upsilon}(2S) decay and of the {Upsilon}(3S) - {Upsilon}(2S) mass difference.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 1015605
• Report Number(s): SLAC-PUB-14470; arXiv:1105.4234; TRN: US201111%%680
• Journal Information: Phys.Rev.D84:011104,2011, Vol. 84, Issue 1; ISSN 1550--7998
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOTTOMONIUM
DECAY
MASS DIFFERENCE
MASS DISTRIBUTION
Experiment-HEP
HEPEX