Subjet multiplicity of gluon and quark jets reconstructed with the [Formula Presented] algorithm in [Formula Presented] collisions

V. M. Abazov, B. Abbott, A. Abdesselam, M. Abolins, V. Abramov, B. S. Acharya, D. L. Adams, M. Adams, S. N. Ahmed, G. D. Alexeev, A. Alton, G. A. Alves, N. Amos, E. W. Anderson, Y. Arnoud, C. Avila, M. M. Baarmand, V. V. Babintsev, L. Babukhadia, T. C. BaconA. Baden, B. Baldin, P. W. Balm, S. Banerjee, E. Barberis, P. Baringer, J. Barreto, J. F. Bartlett, U. Bassler, D. Bauer, A. Bean, F. Beaudette, M. Begel, A. Belyaev, S. B. Beri, G. Bernardi, I. Bertram, A. Besson, R. Beuselinck, V. A. Bezzubov, P. C. Bhat, V. Bhatnagar, M. Bhattacharjee, G. Blazey, F. Blekman, S. Blessing, A. Boehnlein, N. I. Bojko, F. Borcherding, K. Bos, T. Bose, A. Brandt, R. Breedon, G. Briskin, R. Brock, G. Brooijmans, A. Bross, D. Buchholz, M. Buehler, V. Buescher, V. S. Burtovoi, J. M. Butler, F. Canelli, W. Carvalho, D. Casey, Z. Casilum, H. Castilla-Valdez, D. Chakraborty, K. M. Chan, S. V. Chekulaev, D. K. Cho, S. Choi, S. Chopra, J. H. Christenson, M. Chung, D. Claes, A. R. Clark, J. Cochran, L. Coney, B. Connolly, W. E. Cooper, D. Coppage, S. Crépé-Renaudin, M. A.C. Cummings, D. Cutts, G. A. Davis, K. Davis, K. De, S. J. de Jong, K. Del Signore, M. Demarteau, R. Demina, P. Demine, D. Denisov, S. P. Denisov, S. Desai, H. T. Diehl, M. Diesburg, S. Doulas, Y. Ducros

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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 (Formula presented) of energy clusters. Using the standard value (Formula presented) of the jet-separation parameter in the (Formula presented) algorithm, we find that the (Formula presented) of such jets is higher than the (Formula presented) of matched jets reconstructed with cones of radius (Formula presented) by about 5 (8) GeV at (Formula presented) To examine internal jet structure, the (Formula presented) algorithm is applied within (Formula presented) jets to resolve any subjets. The multiplicity of subjets in jet samples at (Formula presented) and 630 GeV is extracted separately for gluons (Formula presented) and quarks (Formula presented) and the ratio of average subjet multiplicities in gluon and quark jets is measured as (Formula presented) This ratio is in agreement with the expectations from the HERWIG Monte Carlo event generator and a resummation calculation, and with observations in (Formula presented) annihilations, and is close to the naive prediction for the ratio of color charges of (Formula presented). © 2002 The American Physical Society.
Original languageEnglish
Pages (from-to)20
Number of pages1
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Publication statusPublished - 1 Jan 2002
Externally publishedYes

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    Abazov, V. M., Abbott, B., Abdesselam, A., Abolins, M., Abramov, V., Acharya, B. S., Adams, D. L., Adams, M., Ahmed, S. N., Alexeev, G. D., Alton, A., Alves, G. A., Amos, N., Anderson, E. W., Arnoud, Y., Avila, C., Baarmand, M. M., Babintsev, V. V., Babukhadia, L., ... Ducros, Y. (2002). Subjet multiplicity of gluon and quark jets reconstructed with the [Formula Presented] algorithm in [Formula Presented] collisions. Physical Review D - Particles, Fields, Gravitation and Cosmology, 20.