Advanced

Three- and four-jet production at low x at HERA

Aaron, F. D.; Aktas, A.; Alexa, C.; Andreev, V.; Antunovic, B.; Aplin, S.; Asmone, A.; Astvatsatourov, A.; Backovic, S. and Baghdasaryan, A., et al. (2008) In European Physical Journal C. Particles and Fields 54(3). p.389-409
Abstract
Three- and four-jet production is measured in deep-inelastic ep scattering at low x and Q(2) with the H1 detector using an integrated luminosity of 44.2 pb(-1). Several phase space regions are selected for the three-jet analysis in order to study the underlying parton dynamics from global topologies to the more restrictive regions of forward jets close to the proton direction. The measurements of cross sections for events with at least three jets are compared to fixed order QCD predictions of O(alpha(2)(s)) and O(alpha(3)(s)) and with Monte Carlo simulation programs where higher order effects are approximated by parton showers. A good overall description is provided by the O(alpha(3)(s)) calculation. Too few events are predicted at the... (More)
Three- and four-jet production is measured in deep-inelastic ep scattering at low x and Q(2) with the H1 detector using an integrated luminosity of 44.2 pb(-1). Several phase space regions are selected for the three-jet analysis in order to study the underlying parton dynamics from global topologies to the more restrictive regions of forward jets close to the proton direction. The measurements of cross sections for events with at least three jets are compared to fixed order QCD predictions of O(alpha(2)(s)) and O(alpha(3)(s)) and with Monte Carlo simulation programs where higher order effects are approximated by parton showers. A good overall description is provided by the O(alpha(3)(s)) calculation. Too few events are predicted at the lowest x similar to 10(-4), especially for topologies with two forward jets. This hints to large contributions at low x from initial state radiation of gluons close to the proton direction and unordered in transverse momentum. The Monte Carlo program in which gluon radiation is generated by the colour dipole model gives a good description of both the three- and the four-jet data in absolute normalisation and shape. (Less)
Please use this url to cite or link to this publication:
author
, et al. (More)
(Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
European Physical Journal C. Particles and Fields
volume
54
issue
3
pages
389 - 409
publisher
Springer
external identifiers
  • wos:000254206800004
  • scopus:41249099946
ISSN
1434-6044
DOI
10.1140/epjc/s10052-008-0544-3
language
English
LU publication?
yes
id
9cc7b7ce-2d91-46bd-816e-8755c413770b (old id 1208144)
date added to LUP
2008-08-27 09:31:02
date last changed
2017-06-04 03:58:57
@article{9cc7b7ce-2d91-46bd-816e-8755c413770b,
  abstract     = {Three- and four-jet production is measured in deep-inelastic ep scattering at low x and Q(2) with the H1 detector using an integrated luminosity of 44.2 pb(-1). Several phase space regions are selected for the three-jet analysis in order to study the underlying parton dynamics from global topologies to the more restrictive regions of forward jets close to the proton direction. The measurements of cross sections for events with at least three jets are compared to fixed order QCD predictions of O(alpha(2)(s)) and O(alpha(3)(s)) and with Monte Carlo simulation programs where higher order effects are approximated by parton showers. A good overall description is provided by the O(alpha(3)(s)) calculation. Too few events are predicted at the lowest x similar to 10(-4), especially for topologies with two forward jets. This hints to large contributions at low x from initial state radiation of gluons close to the proton direction and unordered in transverse momentum. The Monte Carlo program in which gluon radiation is generated by the colour dipole model gives a good description of both the three- and the four-jet data in absolute normalisation and shape.},
  author       = {Aaron, F. D. and Aktas, A. and Alexa, C. and Andreev, V. and Antunovic, B. and Aplin, S. and Asmone, A. and Astvatsatourov, A. and Backovic, S. and Baghdasaryan, A. and Baranov, P. and Barrelet, E. and Bartel, W. and Baudrand, S. and Beckingham, M. and Begzsuren, K. and Behnke, O. and Behrendt, O. and Belousov, A. and Berger, N. and Bizot, J. C. and Boenig, M. -O. and Boudry, V. and Bozovic-Jelisavcic, I. and Bracinik, J. and Brandt, G. and Brinkmann, M. and Brisson, V. and Bruncko, D. and Buesser, F. W. and Bunyatyan, A. and Buschhorn, G. and Bystritskaya, L. and Campbell, A. J. and Avila, K. B. Cantun and Cassol-Brunner, F. and Cerny, K. and Cerny, V. and Chekelian, V. and Cholewa, A. and Contreras, J. G. and Coughlan, J. A. and Cozzika, G. and Cvach, J. and Dainton, J. B. and Daume, K. and Deak, M. and de Boer, Y. and Delcourt, B. and Del Degan, M. and Delvax, J. and De Roeck, A. and De Wolf, E. A. and Diaconu, C. and Dodonov, V. and Dubak, A. and Eckerlin, G. and Efremenko, V. and Egli, S. and Eichler, R. and Eisele, F. and Eliseev, A. and Elsen, E. and Essenov, S. and Falkiewicz, A. and Faulkner, P. J. W. and Favart, L. and Fedotov, A. and Felst, R. and Feltesse, J. and Ferencei, J. and Finke, L. and Fleischer, M. and Fomenko, A. and Franke, G. and Frisson, T. and Gabathuler, E. and Gayler, J. and Ghazaryan, S. and Ginzburgskaya, S. and Glazov, A. and Glushkov, I. and Goerlich, L. and Goettlich, M. and Gogitidze, N. and Gorbounov, S. and Gouzevitch, M. and Grab, C. and Greenshaw, T. and Grell, B. R. and Grindhammer, G. and Habib, S. and Haidt, D. and Hansson, Magnus and Heinzelmann, G. and Helebrant, C. and Henderson, R. C. W. and Henschel, H. and Herrera, G. and Hildebrandt, M. and Hiller, K. H. and Hoffmann, D. and Horisberger, R. and Hovhannisyan, A. and Hreus, T. and Jacquet, M. and Janssen, M. E. and Janssen, X. and Jemanov, V. and Jönsson, Leif and Johnson, D. P. and Jung, A. W. and Jung, H. and Kapichine, M. and Katzy, J. and Kenyon, I. R. and Kiesling, C. and Klein, M. and Kleinwort, C. and Klimkovich, T. and Kluge, T. and Knutsson, A. and Korbel, V. and Kostka, P. and Kraemer, M. and Krastev, K. and Kretzschmar, J. and Kropivnitskaya, A. and Krueger, K. and Landon, M. P. J. and Lange, W. and Lastovicka-Medin, G. and Laycock, P. and Lebedev, A. and Leibenguth, G. and Lendermann, V. and Levonian, S. and Li, G. and Lindfeld, L. and Lipka, K. and Liptaj, A. and List, B. and List, J. and Loktionova, N. and Lopez-Fernandez, R. and Lubimov, V. and Lucaci-Timoce, A. -I. and Lytkin, L. and Makankine, A. and Malinovski, E. and Marage, P. and Marti, L. and Martisikova, M. and Martyn, H. -U. and Maxfield, S. J. and Mehta, A. and Meier, K. and Meyer, A. B. and Meyer, H. and Meyer, H. and Meyer, J. and Michels, V. and Mikocki, S. and Milcewicz-Mika, I. and Mohamed, A. and Moreau, F. and Morozov, A. and Morris, J. V. and Mozer, M. U. and Mueller, K. and Murin, P. and Nankov, K. and Naroska, B. and Naumann, T. and Newman, P. R. and Niebuhr, C. and Nikiforov, A. and Nowak, G. and Nowak, K. and Nozicka, M. and Oganezov, R. and Olivier, B. and Olsson, J. E. and Osman, Sakar and Ozerov, D. and Palichik, V. and Panagoulias, I. and Pandurovic, M. and Papadopoulou, T. and Pascaud, C. and Patel, G. D. and Peng, H. and Perez, E. and Perez-Astudillo, D. and Perieanu, A. and Petrukhin, A. and Picuric, I. and Piec, S. and Pitzl, D. and Placakyte, R. and Polifka, R. and Povh, B. and Preda, T. and Prideaux, P. and Radescu, V. and Rahmat, A. J. and Raicevic, N. and Ravdandorj, T. and Reimer, P. and Risler, C. and Rizvi, E. and Robmann, P. and Roland, B. and Roosen, R. and Rostovtsev, A. and Rurikova, Z. and Rusakov, S. and Salek, D. and Salvaire, F. and Sankey, D. P. C. and Sauter, M. and Sauvan, E. and Schmidt, S. and Schmitt, S. and Schmitz, C. and Schoeffel, L. and Schoening, A. and Schultz-Coulon, H. -C. and Sefkow, F. and Shaw-West, R. N. and Sheviakov, I. and Shtarkov, L. N. and Sloan, T. and Smiljanic, I. and Smirnov, P. and Soloviev, Y. and South, D. and Spaskov, V. and Specka, A. and Staykova, Z. and Steder, M. and Stella, B. and Stiewe, J. and Straumann, U. and Sunar, D. and Sykora, T. and Tchoulakov, V. and Thompson, G. and Thompson, P. D. and Toll, T. and Tomasz, F. and Tran, T. H. and Traynor, D. and Trinh, T. N. and Truoel, P. and Tsakov, I. and Tseepeldorj, B. and Tsipolitis, G. and Tsurin, I. and Turnau, J. and Tzamariudaki, E. and Urban, K. and Utkin, D. and Valkarova, A. and Vallee, C. and Van Mechelen, P. and Trevino, A. Vargas and Vazdik, Y. and Vinokurova, S. and Volchinski, V. and Weber, G. and Weber, R. and Wegener, D. and Werner, C. and Wessels, M. and Wissing, C. and Wolf, R. and Wuensch, E. and Xella, S. and Yeganov, V. and Zacek, J. and Zalesak, J. and Zhang, Z. and Zhelezov, A. and Zhokin, A. and Zhu, Y. C. and Zimmermann, T. and Zohrabyan, H. and Zomer, F.},
  issn         = {1434-6044},
  language     = {eng},
  number       = {3},
  pages        = {389--409},
  publisher    = {Springer},
  series       = {European Physical Journal C. Particles and Fields},
  title        = {Three- and four-jet production at low x at HERA},
  url          = {http://dx.doi.org/10.1140/epjc/s10052-008-0544-3},
  volume       = {54},
  year         = {2008},
}