Charged particle multiplicity in e+ e-interactions at s**(1/2) = 130-GeV

From the data collected by DELPHI at LEP in autumn 1995, the multiplicity of charged particles at a hadronic energy of 130 GeV has been measured to be 〈 n ch 〉 = 23.84 ± 0.51 (stat) ± 0.52 (syst). When compared to lower energy data, the value measured is consistent with the evolution predicted by QCD with corrections at next-to-leading order, for a value α s (130 GeV) = 0.105 ± 0.003 (stat) ± 0.008 (syst).

electron positron: colliding beams
colliding beams: electron positron
electron positron: annihilation
annihilation: electron positron
hadron: multiple production
multiple production: hadron
charged particle: multiplicity
strong interaction: coupling constant
coupling constant: strong interaction
quantum chromodynamics: perturbation theory

References(15)

Figures(0)

[1]

Charged particle multiplicity distributions in Z0 hadronic decays

DELPHI

Collaboration

•

P. Abreu

et al.

- Z.Phys.C 50 (1991) 185-194
•
DOI:
- 10.1007/BF01474073

[2]

Average Multiplicities in Jets

B.R. Webber
(
- Cambridge U. and
- CERN
)

- Phys.Lett.B 143 (1984) 501-504
•
DOI:
- 10.1016/0370-2693(84)91510-7

[3]

The DELPHI detector at LEP

DELPHI

Collaboration

•

P.A. Aarnio

et al.

- Nucl.Instrum.Meth.A 303 (1991) 233-276
•
DOI:
- 10.1016/0168-9002(91)90793-P

[4]

Performance of the DELPHI detector

DELPHI

Collaboration

•

P. Abreu

et al.

- Nucl.Instrum.Meth.A 378 (1996) 57-100
•
DOI:
- 10.1016/0168-9002(96)00463-9

[5]

New jet cluster algorithms: Next-to-leading order QCD and hadronization corrections

- Nucl.Phys.B 370 (1992) 310-334,
- Nucl.Phys.B 523 (1998) 681-681 (erratum)
•
DOI:
- 10.1016/0550-3213(92)90289-N

[6]

High-energy physics event generation with PYTHIA 5.7 and JETSET 7.4

Torbjorn Sjostrand
(
- CERN
)

- Comput.Phys.Commun. 82 (1994) 74-90,
- CERN Geneva - TH. 7111 (93/12,rec.Jan.94) 17 p. and e: CERN th-7111-93
•
DOI:
- 10.1016/0010-4655(94)90132-5