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Subjet multiplicity of gluon and quark jets reconstructed with the κ⊥ algorithm in pp̄ collisions

Publication ,  Journal Article
Abazov, VM; Abbott, B; Abdesselam, A; Abolins, M; Abramov, V; Acharya, BS; Adams, DL; Adams, M; Ahmed, SN; Alexeev, GD; Alton, A; Alves, GA ...
Published in: Physical Review D
January 1, 2002
Published version (DOI)

The DØ Collaboration has studied for the first time the properties of hadron-collider jets reconstructed with a successive-combination algorithm based on relative transverse momenta (κ⊥) of energy clusters. Using the standard value D = 1.0 of the jet-separation parameter in the κ⊥ algorithm, we find that the pT of such jets is higher than the ET of matched jets reconstructed with cones of radius R = 0.7, by about 5 (8) GeV at pT ≈90 (240) GeV. To examine internal jet structure, the κ⊥ algorithm is applied within D = 0.5 jets to resolve any subjets. The multiplicity of subjets in jet samples at √s = 1800 GeV and 630 GeV is extracted separately for gluons (Mg) and quarks (Mq), and the ratio of average subjet multiplicities in gluon and quark jets is measured as (〈Mg〉-1)/(〈Mq〉-1) = 1.84±0.15 (stat)±0.180.22 (syst). This ratio is in agreement with the expectations from the HERWIG Monte Carlo event generator and a resummation calculation, and with observations in e+e- annihilations, and is close to the naive prediction for the ratio of color charges of CA /CF = 9/4 = 2.25.

Duke Scholars

Ashutosh V. Kotwal
Author Ashutosh V. Kotwal Physics

Published In

Physical Review D

DOI

10.1103/PhysRevD.65.052008

ISSN

0556-2821

Publication Date

January 1, 2002

Volume

65

Issue

5

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences
 

Citation

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Abazov, V. M., Abbott, B., Abdesselam, A., Abolins, M., Abramov, V., Acharya, B. S., … Ducros, Y. (2002). Subjet multiplicity of gluon and quark jets reconstructed with the κ⊥ algorithm in pp̄ collisions. Physical Review D, 65(5). https://doi.org/10.1103/PhysRevD.65.052008
Abazov, V. M., B. Abbott, A. Abdesselam, M. Abolins, V. Abramov, B. S. Acharya, D. L. Adams, et al. “Subjet multiplicity of gluon and quark jets reconstructed with the κ⊥ algorithm in pp̄ collisions.” Physical Review D 65, no. 5 (January 1, 2002). https://doi.org/10.1103/PhysRevD.65.052008.
Abazov VM, Abbott B, Abdesselam A, Abolins M, Abramov V, Acharya BS, et al. Subjet multiplicity of gluon and quark jets reconstructed with the κ⊥ algorithm in pp̄ collisions. Physical Review D. 2002 Jan 1;65(5).
Abazov, V. M., et al. “Subjet multiplicity of gluon and quark jets reconstructed with the κ⊥ algorithm in pp̄ collisions.” Physical Review D, vol. 65, no. 5, Jan. 2002. Scopus, doi:10.1103/PhysRevD.65.052008.
Abazov VM, Abbott B, Abdesselam A, Abolins M, Abramov V, Acharya BS, Adams DL, Adams M, Ahmed SN, Alexeev GD, Alton A, Alves GA, Amos N, Anderson EW, Arnoud Y, Avila C, Baarmand MM, Babintsev VV, Babukhadia L, Bacon TC, Baden A, Baldin B, Balm PW, Banerjee S, Barberis E, Baringer P, Barreto J, Bartlett JF, Bassler U, Bauer D, Bean A, Beaudette F, Begel M, Belyaev A, Beri SB, Bernardi G, Bertram I, Besson A, Beuselinck R, Bezzubov VA, Bhat PC, Bhatnagar V, Bhattacharjee M, Blazey G, Blekman F, Blessing S, Boehnlein A, Bojko NI, Borcherding F, Bos K, Bose T, Brandt A, Breedon R, Briskin G, Brock R, Brooijmans G, Bross A, Buchholz D, Buehler M, Buescher V, Burtovoi VS, Butler JM, Canelli F, Carvalho W, Casey D, Casilum Z, Castilla-Valdez H, Chakraborty D, Chan KM, Chekulaev SV, Cho DK, Choi S, Chopra S, Christenson JH, Chung M, Claes D, Clark AR, Cochran J, Coney L, Connolly B, Cooper WE, Coppage D, Crépé-Renaudin S, Cummings MAC, Cutts D, Davis GA, Davis K, De K, De Jong SJ, Del Signore K, Demarteau M, Demina R, Demine P, Denisov D, Denisov SP, Desai S, Diehl HT, Diesburg M, Doulas S, Ducros Y. Subjet multiplicity of gluon and quark jets reconstructed with the κ⊥ algorithm in pp̄ collisions. Physical Review D. 2002 Jan 1;65(5).

Published In

Physical Review D

DOI

10.1103/PhysRevD.65.052008

ISSN

0556-2821

Publication Date

January 1, 2002

Volume

65

Issue

5

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences