Structure at 2175 MeV in e{sup +}e{sup -}{yields}{phi}f{sub 0}(980) observed via initial-state radiation

Journal Article · Wed Nov 01 00:00:00 EST 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.74.091103· OSTI ID:20873105

Aubert, B; Bona, M; Boutigny, D; Couderc, F; Karyotakis, Y; Lees, J P; Poireau, V; Tisserand, V; Zghiche, A ^[1]; Grauges, E ^[2]; Palano, A ^[3]; Chen, J C; Qi, N D; Rong, G; Wang, P; Zhu, Y S ^[4]; Eigen, G; Ofte, I; Stugu, B ^[5]; Abrams, G S ^[6]

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1. Laboratoire de Physique des Particules, IN2P3/CNRS et Universite de Savoie, F-74941 Annecy-Le-Vieux (France)
2. Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
3. Universita di Bari, Dipartimento di Fisica and INFN, I-70126 Bari (Italy)
4. Institute of High Energy Physics, Beijing 100039 (China)
5. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
6. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)

We study the initial-state-radiation processes e{sup +}e{sup -}{yields}K{sup +}K{sup -}{pi}{sup +}{pi}{sup -}{gamma} and e{sup +}e{sup -}{yields}K{sup +}K{sup -}{pi}{sup 0}{pi}{sup 0}{gamma} using an integrated luminosity of 232 fb{sup -1} collected at the {upsilon}(4S) mass with the BABAR detector at SLAC. Even though these reactions are dominated by intermediate states with excited kaons, we are able to study for the first time the cross section for e{sup +}e{sup -}{yields}{phi}(1020)f{sub 0}(980) as a function of center-of-mass energy. We observe a structure near threshold consistent with a 1{sup --} resonance with mass m=2.175{+-}0.010{+-}0.015 GeV/c{sup 2} and width {gamma}=58{+-}16{+-}20 MeV. We observe no Y(4260) signal and set a limit of B{sub Y{yields}}{sub {phi}}{sub {pi}{sup +}}{sub {pi}{sup -}}{center_dot}{gamma}{sub ee}{sup Y}<0.4 eV (90% confidence level), which excludes some models.

• OSTI ID: 20873105
• Journal Information: Physical Review. D, Particles Fields, Vol. 74, Issue 9; Other Information: DOI: 10.1103/PhysRevD.74.091103; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CROSS SECTIONS
ELECTRON-POSITRON INTERACTIONS
F0-980 MESONS
GEV RANGE
HADRONIC PARTICLE DECAY
INCLUSIVE INTERACTIONS
INTERMEDIATE STATE
KAONS MINUS
KAONS PLUS
MEV RANGE
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PARTICLE WIDTHS
PEP STORAGE RINGS
PHI-1020 MESONS
PHI-1680 MESONS
PHOTONS
PIONS MINUS
PIONS PLUS
RESONANCE PARTICLES
REST MASS
UPSILON-10580 MESONS