- Main
Bose-Einstein correlations in e+e- collisions.
- Author(s): Juricic, I
- Goldhaber, G
- Gidal, G
- Abrams, G
- Amidei, D
- Baden, AR
- Boyer, J
- Butler, F
- Carithers, WC
- Gold, MS
- Golding, L
- Haggerty, J
- Herrup, D
- Kadyk, JA
- Levi, ME
- Nelson, ME
- Rowson, PC
- Schellman, H
- Schmidke, WB
- Sheldon, PD
- Trilling, GH
- Wood, DR
- Barklow, T
- Boyarski, A
- Breidenbach, M
- Burchat, P
- Burke, DL
- Cords, D
- Dorfan, JM
- Feldman, GJ
- Gladney, L
- Hanson, G
- Hayes, K
- Hitlin, DG
- Hollebeek, RJ
- Innes, WR
- Jaros, JA
- Karlen, D
- Klein, SR
- Lankford, AJ
- Larsen, RR
- LeClaire, BW
- Lockyer, NS
- Lüth, V
- Ong, RA
- Perl, ML
- Richter, B
- Riles, K
- Ross, MC
- Schindler, RH
- Yelton, JM
- Schaad, T
- Schwitters, RF
- et al.
Abstract
Four data sets collected with the Mark II detector during its operation at the SPEAR and PEP e+e- storage rings at SLAC are used to study the Bose-Einstein correlation between pairs and triplets of like-sign charged pions. The data sets represent four different regions of energy available for hadron production: the J at s =3.095 GeV, typical hadronic energy of 5 GeV in two-photon events, and annihilation in the energy regions s =47 GeV above the J, and s =29 GeV. The Bose-Einstein correlation is studied as a function of Q2, the four-momentum difference squared of the pair, and of Q32, an analogous quantity defined for triplets. After corrections for Coulomb effects and pion misidentification, pair analyses indicate a nearly full Bose-Einstein enhancement (1) in the J and the two-photon data, and about half the maximum value in the two higher-energy data sets. The pair analysis parameter r lies within a band of ±0.1 fm around 0.7 fm and is essentially the same for all four data sets. Pion triplet analyses give consistent results for the triplet parameters 3 and r3. In an attempt to investigate the shape of the pion source, we also study the Bose-Einstein correlation in pion pairs using two-dimensional distributions in components of Q2. © 1989 The American Physical Society.
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