Study of e{sup +}e{sup -}{yields}{lambda}{lambda}, {lambda}{sigma}{sup 0}, {sigma}{sup 0}{sigma}{sup 0} using initial state radiation with BABAR

Journal Article · Thu Nov 01 04:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.76.092006· OSTI ID:21032539

Aubert, B; Bona, M; Boutigny, D; Karyotakis, Y; Lees, J P; Poireau, V; Prudent, X; Tisserand, V; Zghiche, A ^[1]; Tico, J Garra; Grauges, E ^[2]; Lopez, L; Palano, A; Pappagallo, M ^[3]; Eigen, G; Stugu, B; Sun, L ^[4]; Abrams, G S; Battaglia, M; Brown, D N ^[5]

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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. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
5. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)

We study the e{sup +}e{sup -}{yields}{lambda}{lambda}{gamma}, {lambda}{sigma}{sup 0}{gamma}, {sigma}{sup 0}{sigma}{sup 0}{gamma} processes using 230 fb{sup -1} of integrated luminosity collected by the BABAR detector at e{sup +}e{sup -} center-of-mass energy of 10.58 GeV. From the analysis of the baryon-antibaryon mass spectra the cross sections for e{sup +}e{sup -}{yields}{lambda}{lambda}, {lambda}{sigma}{sup 0}, {sigma}{sup 0}{sigma}{sup 0} are measured in the dibaryon mass range from threshold up to 3 GeV/c{sup 2}. The ratio of electric and magnetic form factors, |G{sub E}/G{sub M}|, is measured for e{sup +}e{sup -}{yields}{lambda}{lambda}, and limits on the relative phase between {lambda} form factors are obtained. We also measure the J/{psi}{yields}{lambda}{lambda}, {sigma}{sup 0}{sigma}{sup 0}, and {psi}(2S){yields}{lambda}{lambda} branching fractions.

• OSTI ID: 21032539
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 76; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTIBARYONS
BRANCHING RATIO
CROSS SECTIONS
ELECTROMAGNETIC FORM FACTORS
ELECTRON-POSITRON INTERACTIONS
ELECTRONS
GEV RANGE
LAMBDA BARYONS
MASS SPECTRA
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PEP STORAGE RINGS
PHOTONS
POSITRONS
REST MASS
SIGMA BARYONS