TY - JOUR
T1 - Colour reconnection in e+e-->W+W- at sqrt(s)=189-209 GeV
AU - Abbiendi, G
AU - Anagnostou, Georgios
AU - Bell, Paul
AU - Charlton, David
AU - Hawkes, Christopher
AU - Jovanovic, Predrag
AU - Watson, Miriam
AU - Watkins, Peter
AU - Watson, Alan
AU - Watson, Nigel
AU - Wilson, John
PY - 2006/2/1
Y1 - 2006/2/1
N2 - The effects of the final state interaction phenomenon known as colour reconnect ion are investigated at centre-of-mass energies in the range root s similar or equal to 189-209GeV using the OPAL detector at LEP. Colour reconnection is expected to affect observables based on charged particles in hadronic decays of W+W-. Measurements of inclusive charged particle multiplicities, and of their angular distribution with respect to the four jet axes of the events, are used to test models of colour reconnection. The data are found to exclude extreme scenarios of the Sjostrand-Khoze Type I (SK-I) model and are compatible with other models, both with and without colour reconnection effects. In the context of the SK-I model, the best agreement with data is obtained for a reconnection probability of 37%. Assuming no colour reconnection, the charged particle multiplicity in hadronically decaying W bosons is measured to be (n(ch)(qq)) = 19.38 +/- 0.05(stat.) +/- 0.08(syst.).
AB - The effects of the final state interaction phenomenon known as colour reconnect ion are investigated at centre-of-mass energies in the range root s similar or equal to 189-209GeV using the OPAL detector at LEP. Colour reconnection is expected to affect observables based on charged particles in hadronic decays of W+W-. Measurements of inclusive charged particle multiplicities, and of their angular distribution with respect to the four jet axes of the events, are used to test models of colour reconnection. The data are found to exclude extreme scenarios of the Sjostrand-Khoze Type I (SK-I) model and are compatible with other models, both with and without colour reconnection effects. In the context of the SK-I model, the best agreement with data is obtained for a reconnection probability of 37%. Assuming no colour reconnection, the charged particle multiplicity in hadronically decaying W bosons is measured to be (n(ch)(qq)) = 19.38 +/- 0.05(stat.) +/- 0.08(syst.).
U2 - 10.1140/epjc/s2005-02439-x
DO - 10.1140/epjc/s2005-02439-x
M3 - Article
VL - 45
SP - 291
EP - 305
JO - European Physical Journal C
JF - European Physical Journal C
ER -