Ερευνητικό υλικό ΕΚΠΑ

Charged particle multiplicity in e(+)e(-)-> q(q)over-bar events at 161
and 172 GeV and from the decay of the W boson

Αγγλικά

The data collected by DELPHI in 1996 have been used to measure the
average charged particle multiplicities and dispersions in q (q) over
bar events at centre-of-mass energies of root s = 161 GeV and root s =
172 GeV, and the average charge multiplicity in WW events at root s =
172 GeV. The multiplicities in q (q) over bar events are consistent with
the evolution predicted by QCD. The dispersions in the multiplicity
distributions are consistent with Koba-Nielsen-Olesen (KNO) scaling. The
average multiplicity of charged particles in hadronic W decays has been
measured for the first time; its value, 19.23 +/- 0.74(stat + syst), is
consistent with that expected for an e(+)e(-) interaction at a
centre-of-mass energy equal to the W mass. The charged particle
multiplicity in W decays shows no evidence of effects of colour
reconnection between partons from different W’s at the present level of
statistics. (C) 1998 Elsevier Science B.V.

1998

Abreu, P
Adam, W
Adye, T
Ajinenko, I
Alekseev, GD and
Alemany, R
Allport, PP
Almehed, S
Amaldi, U
Amato, S and
Andersson, P
Andreazza, A
Antilogus, P
Apel, WD
Arnoud,
Y
Asman, B
Augustin, JE
Augustinus, A
Baillon, P and
Bambade, P
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Barbi, M
Bardin, DY
Barker, G and
Baroncelli, A
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Bates, MJ
Battaglia, M and
Baubillier, M
Baudot, J
Becks, KH
Begalli, M
Beilliere,
P
Belokopytov, Y
Belous, K
Benvenuti, AC
Berat, C and
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Besancon, M
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Bigi, M
Bilenky, MS
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Bizouard, MA
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Boonekamp, M and
Booth, PSL
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and Boudinov, E
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Bowcock, TJV and
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Rozas, AJC
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DELPHI Collaborat

PHYSICS LETTERS B

ELSEVIER SCIENCE BV

416

1-2

233-246

https://doi.org/10.1016/S0370-2693(97)01248-3

10.1016/S0370-2693(97)01248-3

https://pergamos.lib.uoa.gr/uoa/dl/object/3050039