Published November 1, 2010 | Version v1
Journal article Metadata-only

Observation of an enhancement in e+e-→Υ(1S)π+π-, Υ(2S)π+π-, and Υ(3S)π+π- production near √(s)=10.89 GeV

Creators

  • 1. Department of Physics, National Taiwan University, Taipei (China)
  • 2. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)

Description

We measure the production cross sections for e+e-→Υ(1S)π+π-, Υ(2S)π+π-, and Υ(3S)π+π- as a function of √(s) between 10.83 GeV and 11.02 GeV. The data consist of 8.1 fb-1 collected with the Belle detector at the KEKB e+e- collider. We observe enhanced production in all three final states that does not agree well with the conventional Υ(10860) line shape. A fit using a Breit-Wigner resonance shape yields a peak mass of [10 888.4-2.6+2.7(stat)±1.2(syst)] MeV/c2 and a width of [30.7-7.0+8.3(stat)±3.1(syst)] MeV/c2.

Additional details

Identifiers

DOI
10.1103/PhysRevD.82.091106;
arXiv
arXiv:0810.3829v2;

Publishing Information

Journal Title
Physical Review. D, Particles Fields
Journal Volume
82
Journal Issue
9
Journal Page Range
p. 091106-091106.6
ISSN
0556-2821
CODEN
PRVDAQ

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
42095925
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
BREIT-WIGNER FORMULA; CROSS SECTIONS; ELECTRONS; GEV RANGE 10-100; MASS; PEAKS; PIONS MINUS; PIONS PLUS; RESONANCE; UPSILON-10860 MESONS
Descriptors DEC
BOSONS; BOTTOMONIUM; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; HADRONS; LEPTONS; MESONS; PIONS; PSEUDOSCALAR MESONS; QUARKONIUM; VECTOR MESONS

Optional Information

Notes
(c) 2010 American Institute of Physics
Collaborations
Belle Collaboration