Signatures of parton exogamy in e+ e- ---> W+ W- ---> hadrons - INSPIRE

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Signatures of parton exogamy in e+ e- ---> W+ W- ---> hadrons

John R. Ellis
(
- CERN
)
,
Klaus Geiger
(
- Brookhaven
)

Mar, 1997

14 pages

Published in:

Phys.Lett.B 404 (1997) 230-237

e-Print:

hep-ph/9703348 [hep-ph]

DOI:

10.1016/S0370-2693(97)00577-7

Report number:

CERN-TH-97-046,
CERN-TH-97-46

View in:

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Abstract:

We propose possible signatures of `exogamous' combinations between partons in the different W+ and W- hadron showers in e+e- -> W+W- events with purely hadronic final states. Within the space-time model for hadronic shower development that we have proposed previously, we find a possible difference of about 10 % between the mean hadronic multiplicity in such purely hadronic final states and twice the hadronic multiplicity in events in which one W decays hadronically and the other leptonically, i.e., \ne 2 , associated with the formation of hadronic clusters by `exogamous' pairs of partons. We discuss the dependence of this possible difference in multiplicity on the center-of-mass energy, on the hadron momenta, and on the angular separation between the

W~{\pm}

dijets. If it were observed, any such multiplicity difference would indicate that the W's do not hadronize independently, and hence raise questions about the accuracy with which the W mass could be determined from purely hadronic final states.

Note:

14 pages including 5 postscript figures

electron positron: annihilation
W: pair production
W: hadronic decay
showers: hadronic
model: space-time
model: parton
hadron: multiple production
charged particle: multiplicity
multiplicity: energy dependence
transverse momentum

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