Measurement of charged-particle multiplicities in gluon and quark jets in pp̄ collisions at √s = 1:8 TeV

CDF collaboration

doi:10.1103/PhysRevLett.94.171802

Measurement of charged-particle multiplicities in gluon and quark jets in pp̄ collisions at √s = 1:8 TeV

CDF collaboration

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

We report the first largely model independent measurement of charged particle multiplicities in quark and gluon jets, N_q and N_g, produced at the Fermilab Tevatron in pp collisions with a center-of-mass energy of 1.8 TeV and recorded by the Collider Detector at Fermilab. The measurements are made for jets with average energies of 41 and 53 GeV by counting charged particle tracks in cones with opening angles of θ_c = 0:28, 0.36, and 0.47 rad around the jet axis. The corresponding jet hardness Q = E_jetθc varies in the range from 12 to 25 GeV. At Q = 19:2 GeV, the ratio of multiplicities r = N_g=N_q is found to be 1:64 ± 0:17, where statistical and systematic uncertainties are added in quadrature. The results are in agreement with resummed perturbative QCD calculations.

Original language	English (US)
Article number	171802
Journal	Physical review letters
Volume	94
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevLett.94.171802
State	Published - May 6 2005

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.94.171802

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@article{b574cd3ae9534c2ab74ae4d739255ac6,

title = "Measurement of charged-particle multiplicities in gluon and quark jets in p{\=p} collisions at √s = 1:8 TeV",

abstract = "We report the first largely model independent measurement of charged particle multiplicities in quark and gluon jets, Nq and Ng, produced at the Fermilab Tevatron in pp collisions with a center-of-mass energy of 1.8 TeV and recorded by the Collider Detector at Fermilab. The measurements are made for jets with average energies of 41 and 53 GeV by counting charged particle tracks in cones with opening angles of θc = 0:28, 0.36, and 0.47 rad around the jet axis. The corresponding jet hardness Q = Ejetθc varies in the range from 12 to 25 GeV. At Q = 19:2 GeV, the ratio of multiplicities r = Ng=Nq is found to be 1:64 ± 0:17, where statistical and systematic uncertainties are added in quadrature. The results are in agreement with resummed perturbative QCD calculations.",

author = "{CDF collaboration} and D. Acosta and T. Affolder and Albrow, {M. G.} and D. Ambrose and D. Amidei and K. Anikeev and J. Antos and G. Apollinari and T. Arisawa and A. Artikov and W. Ashmanskas and F. Azfar and P. Azzi-Bacchetta and N. Bacchetta and H. Bachacou and W. Badgett and A. Barbaro-Galtieri and Barnes, {V. E.} and Barnett, {B. A.} and S. Baroiant and M. Barone and G. Bauer and F. Bedeschi and S. Behari and S. Belforte and Bell, {W. H.} and G. Bellettini and J. Bellinger and D. Benjamin and A. Beretvas and A. Bhatti and M. Binkley and D. Bisello and M. Bishai and Blair, {R. E.} and C. Blocker and K. Bloom and B. Blumenfeld and A. Bocci and A. Bodek and G. Bolla and A. Bolshov and D. Bortoletto and J. Boudreau and C. Bromberg and E. Brubaker and J. Budagov and Budd, {H. S.} and K. Burkett and M. Schmitt",

year = "2005",

month = may,

day = "6",

doi = "10.1103/PhysRevLett.94.171802",

language = "English (US)",

volume = "94",

journal = "Physical review letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "17",

}

TY - JOUR

T1 - Measurement of charged-particle multiplicities in gluon and quark jets in pp̄ collisions at √s = 1:8 TeV

AU - CDF collaboration

AU - Acosta, D.

AU - Affolder, T.

AU - Albrow, M. G.

AU - Ambrose, D.

AU - Amidei, D.

AU - Anikeev, K.

AU - Antos, J.

AU - Apollinari, G.

AU - Arisawa, T.

AU - Artikov, A.

AU - Ashmanskas, W.

AU - Azfar, F.

AU - Azzi-Bacchetta, P.

AU - Bacchetta, N.

AU - Bachacou, H.

AU - Badgett, W.

AU - Barbaro-Galtieri, A.

AU - Barnes, V. E.

AU - Barnett, B. A.

AU - Baroiant, S.

AU - Barone, M.

AU - Bauer, G.

AU - Bedeschi, F.

AU - Behari, S.

AU - Belforte, S.

AU - Bell, W. H.

AU - Bellettini, G.

AU - Bellinger, J.

AU - Benjamin, D.

AU - Beretvas, A.

AU - Bhatti, A.

AU - Binkley, M.

AU - Bisello, D.

AU - Bishai, M.

AU - Blair, R. E.

AU - Blocker, C.

AU - Bloom, K.

AU - Blumenfeld, B.

AU - Bocci, A.

AU - Bodek, A.

AU - Bolla, G.

AU - Bolshov, A.

AU - Bortoletto, D.

AU - Boudreau, J.

AU - Bromberg, C.

AU - Brubaker, E.

AU - Budagov, J.

AU - Budd, H. S.

AU - Burkett, K.

AU - Schmitt, M.

PY - 2005/5/6

Y1 - 2005/5/6

N2 - We report the first largely model independent measurement of charged particle multiplicities in quark and gluon jets, Nq and Ng, produced at the Fermilab Tevatron in pp collisions with a center-of-mass energy of 1.8 TeV and recorded by the Collider Detector at Fermilab. The measurements are made for jets with average energies of 41 and 53 GeV by counting charged particle tracks in cones with opening angles of θc = 0:28, 0.36, and 0.47 rad around the jet axis. The corresponding jet hardness Q = Ejetθc varies in the range from 12 to 25 GeV. At Q = 19:2 GeV, the ratio of multiplicities r = Ng=Nq is found to be 1:64 ± 0:17, where statistical and systematic uncertainties are added in quadrature. The results are in agreement with resummed perturbative QCD calculations.

AB - We report the first largely model independent measurement of charged particle multiplicities in quark and gluon jets, Nq and Ng, produced at the Fermilab Tevatron in pp collisions with a center-of-mass energy of 1.8 TeV and recorded by the Collider Detector at Fermilab. The measurements are made for jets with average energies of 41 and 53 GeV by counting charged particle tracks in cones with opening angles of θc = 0:28, 0.36, and 0.47 rad around the jet axis. The corresponding jet hardness Q = Ejetθc varies in the range from 12 to 25 GeV. At Q = 19:2 GeV, the ratio of multiplicities r = Ng=Nq is found to be 1:64 ± 0:17, where statistical and systematic uncertainties are added in quadrature. The results are in agreement with resummed perturbative QCD calculations.

UR - http://www.scopus.com/inward/record.url?scp=27144549845&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=27144549845&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.94.171802

DO - 10.1103/PhysRevLett.94.171802

M3 - Article

C2 - 15904280

AN - SCOPUS:27144549845

SN - 0031-9007

VL - 94

JO - Physical review letters

JF - Physical review letters

IS - 17

M1 - 171802

ER -

Measurement of charged-particle multiplicities in gluon and quark jets in pp̄ collisions at √s = 1:8 TeV

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