Measurement of correlations between pions from different Ws in e+ e ---> W+ W- events

Abreu, P.;Cortina Gil, Eduardo;DELPHI Collaboration;et.al.
(2007) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. 401, n° 1-2, p. 181-191 (1997)

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Correlations between pions from different W's in e+e− →W+W− events are studied using data collected by the DELPHI detector at LEP running at a centre-of-mass energy of 172 GeV in 1996. At the present level of statistics, no enhancement of the correlation function above that expected from a pair of uncorrelated W's is observed at small values of the four-momentum difference of the pions.
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Abreu, P., Cortina Gil, E., DELPHI Collaboration, & et al. (2007). Measurement of correlations between pions from different Ws in e+ e ---> W+ W- events. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, 401(1-2), 181-191. https://doi.org/10.1016/S0370-2693(97)00419-X (Original work published 1997)