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

Aaron, FD; Aktas, A; Alexa, C; Andreev, V; Antunovic, B; Aplin, S; Asmone, A; Astvatsatourov, A; Backovic, S; Baghdasaryan, A; Baranov, P; Barrelet, E; Bartel, W; Baudrand, S; Beckingham, M; Begzsuren, K; Behnke, O; Behrendt, O; Belousov, A; Berger, N; Bizot, JC; Boenig, M-O; Boudry, V; Bozovic-Jelisavcic, I; Bracinik, J; Brandt, G; Brinkmann, M; Brisson, V; Bruncko, D; Busser, FW; Bunyatyan, A; Buschhorn, G; Bystritskaya, L; Campbell, AJ; Cantun Avila, KB; Cassol-Brunner, F; Cerny, K; Cerny, V; Chekelian, V; Cholewa, A; Contreras, JG; Coughlan, JA; Cozzika, G; Cvach, J; Dainton, JB; Daum, K; Deak, M; De Boer, Y; Delcourt, B; Del Degan, M; Delvax, J; De Roeck, A; De Wolf, EA; Diaconu, C; Dodonov, V; Dubak, A; Eckerlin, G; Efremenko, V; Egli, S; Eichler, R; Eisele, F; Eliseev, A; Elsen, E; Essenov, S; Falkiewicz, A; Faulkner, PJW; Favart, L; Fedotov, A; Felst, R; Feltesse, J; Ferencei, J; Finke, L; Fleischer, M; Fomenko, A; Franke, G; Frisson, T; Gabathuler, E; Gayler, J; Ghazaryan, S; Ginzburgskaya, S; Glazov, A; Glushkov, I; Goerlich, L; Goettlich, M; Gogitidze, N; Gorbounov, S; Gouzevitch, M; Grab, C; Greenshaw, T; Grell, BR; Grindhammer, G; Habib, S; Haidt, D; Hansson, M; Heinzelmann, G; Helebrant, C; Henderson, RCW; Henschel, H; Herrera, G; Hildebrandt, M; Hiller, KH; Hoffmann, D; Horisberger, R; Hovhannisyan, A; Hreus, T; Jacquet, M; Janssen, ME; Janssen, X; Jemanov, V; Jonsson, L; Johnson, DP; Jung, AW; Jung, H; Kapichine, M; Katzy, J; Kenyon, IR; Kiesling, C; Klein, M; Kleinwort, C; Klimkovich, T; Kluge, T; Knutsson, A; Korbel, V; Kostka, P; Kraemer, M; Krastev, K; Kretzschmar, J; Kropivnitskaya, A; Kruger, K; Landon, MPJ; Lange, W; Lastovicka-Medin, G; Laycock, P; Lebedev, A; Leibenguth, G; Lendermann, V; Levonian, S; Li, G; Lindfeld, L; Lipka, K; Liptaj, A; List, B; List, J; Loktionova, N; Lopez-Fernandez, R; Lubimov, V; Lucaci-Timoce, A-I; Lytkin, L; Makankine, A; Malinovski, E; Marage, P; Marti, L; Martisikova, M; Martyn, H-U; Maxfield, SJ; Mehta, A; Meier, K; Meyer, AB; Meyer, H; Meyer, H; Meyer, J; Michels, V; Mikocki, S; Milcewicz-Mika, I; Mohamed, A; Moreau, F; Morozov, A; Morris, JV; Mozer, MU; Muller, K; Murin, P; Nankov, K; Naroska, B; Naumann, T; Newman, PR; Niebuhr, C; Nikiforov, A; Nowak, G; Nowak, K; Nozicka, M; Oganezov, R; Olivier, B; Olsson, JE; Osman, S; Ozerov, D; Palichik, V; Panagoulias, I; Pandurovic, M; Papadopoulou, T; Pascaud, C; Patel, GD; Peng, H; Perez, E; Perez-Astudillo, D; Perieanu, A; Petrukhin, A; Picuric, I; Piec, S; Pitzl, D; Placakyte, R; Polifka, R; Povh, B; Preda, T; Prideaux, P; Radescu, V; Rahmat, AJ; Raicevic, N; Ravdandorj, T; Reimer, P; Risler, C; Rizvi, E; Robmann, P; Roland, B; Roosen, R; Rostovtsev, A; Rurikova, Z; Rusakov, S; Salek, D; Salvaire, F; Sankey, DPC; Sauter, M; Sauvan, E; Schmidt, S; Schmitt, S; Schmitz, C; Schoeffel, L; Schoning, A; Schultz-Coulon, H-C; Sefkow, F; Shaw-West, RN; Sheviakov, I; Shtarkov, LN; Sloan, T; Smiljanic, I; Smirnov, P; Soloviev, Y; South, D; Spaskov, V; Specka, A; Staykova, Z; Steder, M; Stella, B; Stiewe, J; Straumann, U; Sunar, D; Sykora, T; Tchoulakov, V; Thompson, G; Thompson, PD; Toll, T; Tomasz, F; Tran, TH; Traynor, D; Trinh, TN; Truol, P; Tsakov, I; Tseepeldorj, B; Tsipolitis, G; Tsurin, I; Turnau, J; Tzamariudaki, E; Urban, K; Utkin, D; Valkarova, A; Vallee, C; Van Mechelen, P; Vargas Trevino, A; Vazdik, Y; Vinokurova, S; Volchinski, V; Weber, G; Weber, R; Wegener, D; Werner, C; Wessels, M; Wissing, C; Wolf, R; Wunsch, E; Xella, S; Yeganov, V; Zacek, J; Zalesak, J; Zhang, Z; Zhelezov, A; Zhokin, A; Zhu, YC; Zimmermann, T; Zohrabyan, H; Zomer, F

dc.contributor.author	Aaron, FD	en
dc.contributor.author	Aktas, A	en
dc.contributor.author	Alexa, C	en
dc.contributor.author	Andreev, V	en
dc.contributor.author	Antunovic, B	en
dc.contributor.author	Aplin, S	en
dc.contributor.author	Asmone, A	en
dc.contributor.author	Astvatsatourov, A	en
dc.contributor.author	Backovic, S	en
dc.contributor.author	Baghdasaryan, A	en
dc.contributor.author	Baranov, P	en
dc.contributor.author	Barrelet, E	en
dc.contributor.author	Bartel, W	en
dc.contributor.author	Baudrand, S	en
dc.contributor.author	Beckingham, M	en
dc.contributor.author	Begzsuren, K	en
dc.contributor.author	Behnke, O	en
dc.contributor.author	Behrendt, O	en
dc.contributor.author	Belousov, A	en
dc.contributor.author	Berger, N	en
dc.contributor.author	Bizot, JC	en
dc.contributor.author	Boenig, M-O	en
dc.contributor.author	Boudry, V	en
dc.contributor.author	Bozovic-Jelisavcic, I	en
dc.contributor.author	Bracinik, J	en
dc.contributor.author	Brandt, G	en
dc.contributor.author	Brinkmann, M	en
dc.contributor.author	Brisson, V	en
dc.contributor.author	Bruncko, D	en
dc.contributor.author	Busser, FW	en
dc.contributor.author	Bunyatyan, A	en
dc.contributor.author	Buschhorn, G	en
dc.contributor.author	Bystritskaya, L	en
dc.contributor.author	Campbell, AJ	en
dc.contributor.author	Cantun Avila, KB	en
dc.contributor.author	Cassol-Brunner, F	en
dc.contributor.author	Cerny, K	en
dc.contributor.author	Cerny, V	en
dc.contributor.author	Chekelian, V	en
dc.contributor.author	Cholewa, A	en
dc.contributor.author	Contreras, JG	en
dc.contributor.author	Coughlan, JA	en
dc.contributor.author	Cozzika, G	en
dc.contributor.author	Cvach, J	en
dc.contributor.author	Dainton, JB	en
dc.contributor.author	Daum, K	en
dc.contributor.author	Deak, M	en
dc.contributor.author	De Boer, Y	en
dc.contributor.author	Delcourt, B	en
dc.contributor.author	Del Degan, M	en
dc.contributor.author	Delvax, J	en
dc.contributor.author	De Roeck, A	en
dc.contributor.author	De Wolf, EA	en
dc.contributor.author	Diaconu, C	en
dc.contributor.author	Dodonov, V	en
dc.contributor.author	Dubak, A	en
dc.contributor.author	Eckerlin, G	en
dc.contributor.author	Efremenko, V	en
dc.contributor.author	Egli, S	en
dc.contributor.author	Eichler, R	en
dc.contributor.author	Eisele, F	en
dc.contributor.author	Eliseev, A	en
dc.contributor.author	Elsen, E	en
dc.contributor.author	Essenov, S	en
dc.contributor.author	Falkiewicz, A	en
dc.contributor.author	Faulkner, PJW	en
dc.contributor.author	Favart, L	en
dc.contributor.author	Fedotov, A	en
dc.contributor.author	Felst, R	en
dc.contributor.author	Feltesse, J	en
dc.contributor.author	Ferencei, J	en
dc.contributor.author	Finke, L	en
dc.contributor.author	Fleischer, M	en
dc.contributor.author	Fomenko, A	en
dc.contributor.author	Franke, G	en
dc.contributor.author	Frisson, T	en
dc.contributor.author	Gabathuler, E	en
dc.contributor.author	Gayler, J	en
dc.contributor.author	Ghazaryan, S	en
dc.contributor.author	Ginzburgskaya, S	en
dc.contributor.author	Glazov, A	en
dc.contributor.author	Glushkov, I	en
dc.contributor.author	Goerlich, L	en
dc.contributor.author	Goettlich, M	en
dc.contributor.author	Gogitidze, N	en
dc.contributor.author	Gorbounov, S	en
dc.contributor.author	Gouzevitch, M	en
dc.contributor.author	Grab, C	en
dc.contributor.author	Greenshaw, T	en
dc.contributor.author	Grell, BR	en
dc.contributor.author	Grindhammer, G	en
dc.contributor.author	Habib, S	en
dc.contributor.author	Haidt, D	en
dc.contributor.author	Hansson, M	en
dc.contributor.author	Heinzelmann, G	en
dc.contributor.author	Helebrant, C	en
dc.contributor.author	Henderson, RCW	en
dc.contributor.author	Henschel, H	en
dc.contributor.author	Herrera, G	en
dc.contributor.author	Hildebrandt, M	en
dc.contributor.author	Hiller, KH	en
dc.contributor.author	Hoffmann, D	en
dc.contributor.author	Horisberger, R	en
dc.contributor.author	Hovhannisyan, A	en
dc.contributor.author	Hreus, T	en
dc.contributor.author	Jacquet, M	en
dc.contributor.author	Janssen, ME	en
dc.contributor.author	Janssen, X	en
dc.contributor.author	Jemanov, V	en
dc.contributor.author	Jonsson, L	en
dc.contributor.author	Johnson, DP	en
dc.contributor.author	Jung, AW	en
dc.contributor.author	Jung, H	en
dc.contributor.author	Kapichine, M	en
dc.contributor.author	Katzy, J	en
dc.contributor.author	Kenyon, IR	en
dc.contributor.author	Kiesling, C	en
dc.contributor.author	Klein, M	en
dc.contributor.author	Kleinwort, C	en
dc.contributor.author	Klimkovich, T	en
dc.contributor.author	Kluge, T	en
dc.contributor.author	Knutsson, A	en
dc.contributor.author	Korbel, V	en
dc.contributor.author	Kostka, P	en
dc.contributor.author	Kraemer, M	en
dc.contributor.author	Krastev, K	en
dc.contributor.author	Kretzschmar, J	en
dc.contributor.author	Kropivnitskaya, A	en
dc.contributor.author	Kruger, K	en
dc.contributor.author	Landon, MPJ	en
dc.contributor.author	Lange, W	en
dc.contributor.author	Lastovicka-Medin, G	en
dc.contributor.author	Laycock, P	en
dc.contributor.author	Lebedev, A	en
dc.contributor.author	Leibenguth, G	en
dc.contributor.author	Lendermann, V	en
dc.contributor.author	Levonian, S	en
dc.contributor.author	Li, G	en
dc.contributor.author	Lindfeld, L	en
dc.contributor.author	Lipka, K	en
dc.contributor.author	Liptaj, A	en
dc.contributor.author	List, B	en
dc.contributor.author	List, J	en
dc.contributor.author	Loktionova, N	en
dc.contributor.author	Lopez-Fernandez, R	en
dc.contributor.author	Lubimov, V	en
dc.contributor.author	Lucaci-Timoce, A-I	en
dc.contributor.author	Lytkin, L	en
dc.contributor.author	Makankine, A	en
dc.contributor.author	Malinovski, E	en
dc.contributor.author	Marage, P	en
dc.contributor.author	Marti, L	en
dc.contributor.author	Martisikova, M	en
dc.contributor.author	Martyn, H-U	en
dc.contributor.author	Maxfield, SJ	en
dc.contributor.author	Mehta, A	en
dc.contributor.author	Meier, K	en
dc.contributor.author	Meyer, AB	en
dc.contributor.author	Meyer, H	en
dc.contributor.author	Meyer, H	en
dc.contributor.author	Meyer, J	en
dc.contributor.author	Michels, V	en
dc.contributor.author	Mikocki, S	en
dc.contributor.author	Milcewicz-Mika, I	en
dc.contributor.author	Mohamed, A	en
dc.contributor.author	Moreau, F	en
dc.contributor.author	Morozov, A	en
dc.contributor.author	Morris, JV	en
dc.contributor.author	Mozer, MU	en
dc.contributor.author	Muller, K	en
dc.contributor.author	Murin, P	en
dc.contributor.author	Nankov, K	en
dc.contributor.author	Naroska, B	en
dc.contributor.author	Naumann, T	en
dc.contributor.author	Newman, PR	en
dc.contributor.author	Niebuhr, C	en
dc.contributor.author	Nikiforov, A	en
dc.contributor.author	Nowak, G	en
dc.contributor.author	Nowak, K	en
dc.contributor.author	Nozicka, M	en
dc.contributor.author	Oganezov, R	en
dc.contributor.author	Olivier, B	en
dc.contributor.author	Olsson, JE	en
dc.contributor.author	Osman, S	en
dc.contributor.author	Ozerov, D	en
dc.contributor.author	Palichik, V	en
dc.contributor.author	Panagoulias, I	en
dc.contributor.author	Pandurovic, M	en
dc.contributor.author	Papadopoulou, T	en
dc.contributor.author	Pascaud, C	en
dc.contributor.author	Patel, GD	en
dc.contributor.author	Peng, H	en
dc.contributor.author	Perez, E	en
dc.contributor.author	Perez-Astudillo, D	en
dc.contributor.author	Perieanu, A	en
dc.contributor.author	Petrukhin, A	en
dc.contributor.author	Picuric, I	en
dc.contributor.author	Piec, S	en
dc.contributor.author	Pitzl, D	en
dc.contributor.author	Placakyte, R	en
dc.contributor.author	Polifka, R	en
dc.contributor.author	Povh, B	en
dc.contributor.author	Preda, T	en
dc.contributor.author	Prideaux, P	en
dc.contributor.author	Radescu, V	en
dc.contributor.author	Rahmat, AJ	en
dc.contributor.author	Raicevic, N	en
dc.contributor.author	Ravdandorj, T	en
dc.contributor.author	Reimer, P	en
dc.contributor.author	Risler, C	en
dc.contributor.author	Rizvi, E	en
dc.contributor.author	Robmann, P	en
dc.contributor.author	Roland, B	en
dc.contributor.author	Roosen, R	en
dc.contributor.author	Rostovtsev, A	en
dc.contributor.author	Rurikova, Z	en
dc.contributor.author	Rusakov, S	en
dc.contributor.author	Salek, D	en
dc.contributor.author	Salvaire, F	en
dc.contributor.author	Sankey, DPC	en
dc.contributor.author	Sauter, M	en
dc.contributor.author	Sauvan, E	en
dc.contributor.author	Schmidt, S	en
dc.contributor.author	Schmitt, S	en
dc.contributor.author	Schmitz, C	en
dc.contributor.author	Schoeffel, L	en
dc.contributor.author	Schoning, A	en
dc.contributor.author	Schultz-Coulon, H-C	en
dc.contributor.author	Sefkow, F	en
dc.contributor.author	Shaw-West, RN	en
dc.contributor.author	Sheviakov, I	en
dc.contributor.author	Shtarkov, LN	en
dc.contributor.author	Sloan, T	en
dc.contributor.author	Smiljanic, I	en
dc.contributor.author	Smirnov, P	en
dc.contributor.author	Soloviev, Y	en
dc.contributor.author	South, D	en
dc.contributor.author	Spaskov, V	en
dc.contributor.author	Specka, A	en
dc.contributor.author	Staykova, Z	en
dc.contributor.author	Steder, M	en
dc.contributor.author	Stella, B	en
dc.contributor.author	Stiewe, J	en
dc.contributor.author	Straumann, U	en
dc.contributor.author	Sunar, D	en
dc.contributor.author	Sykora, T	en
dc.contributor.author	Tchoulakov, V	en
dc.contributor.author	Thompson, G	en
dc.contributor.author	Thompson, PD	en
dc.contributor.author	Toll, T	en
dc.contributor.author	Tomasz, F	en
dc.contributor.author	Tran, TH	en
dc.contributor.author	Traynor, D	en
dc.contributor.author	Trinh, TN	en
dc.contributor.author	Truol, P	en
dc.contributor.author	Tsakov, I	en
dc.contributor.author	Tseepeldorj, B	en
dc.contributor.author	Tsipolitis, G	en
dc.contributor.author	Tsurin, I	en
dc.contributor.author	Turnau, J	en
dc.contributor.author	Tzamariudaki, E	en
dc.contributor.author	Urban, K	en
dc.contributor.author	Utkin, D	en
dc.contributor.author	Valkarova, A	en
dc.contributor.author	Vallee, C	en
dc.contributor.author	Van Mechelen, P	en
dc.contributor.author	Vargas Trevino, A	en
dc.contributor.author	Vazdik, Y	en
dc.contributor.author	Vinokurova, S	en
dc.contributor.author	Volchinski, V	en
dc.contributor.author	Weber, G	en
dc.contributor.author	Weber, R	en
dc.contributor.author	Wegener, D	en
dc.contributor.author	Werner, C	en
dc.contributor.author	Wessels, M	en
dc.contributor.author	Wissing, C	en
dc.contributor.author	Wolf, R	en
dc.contributor.author	Wunsch, E	en
dc.contributor.author	Xella, S	en
dc.contributor.author	Yeganov, V	en
dc.contributor.author	Zacek, J	en
dc.contributor.author	Zalesak, J	en
dc.contributor.author	Zhang, Z	en
dc.contributor.author	Zhelezov, A	en
dc.contributor.author	Zhokin, A	en
dc.contributor.author	Zhu, YC	en
dc.contributor.author	Zimmermann, T	en
dc.contributor.author	Zohrabyan, H	en
dc.contributor.author	Zomer, F	en
dc.date.accessioned	2014-03-01T01:29:21Z
dc.date.available	2014-03-01T01:29:21Z
dc.date.issued	2008	en
dc.identifier.issn	1434-6044	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19239
dc.subject.classification	Physics, Particles & Fields	en
dc.subject.other	DEEP-INELASTIC-SCATTERING	en
dc.subject.other	INITIAL-STATE RADIATION	en
dc.subject.other	COLOR DIPOLE MODEL	en
dc.subject.other	JET-PRODUCTION	en
dc.subject.other	PARTON DISTRIBUTIONS	en
dc.subject.other	DIJET PRODUCTION	en
dc.subject.other	QCD ANALYSIS	en
dc.subject.other	MULTIJET PRODUCTION	en
dc.subject.other	VIRTUAL PHOTON	en
dc.subject.other	CROSS-SECTIONS	en
dc.title	Three- and four-jet production at low x at HERA	en
heal.type	journalArticle	en
heal.identifier.primary	10.1140/epjc/s10052-008-0544-3	en
heal.identifier.secondary	http://dx.doi.org/10.1140/epjc/s10052-008-0544-3	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	Three- and four-jet production is measured in deep-inelastic ep scattering at low x and Q2 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(αs2) and O(αs3) and with Monte Carlo simulation programs where higher order effects are approximated by parton showers. A good overall description is provided by the O(αs3) calculation. Too few events are predicted at the lowest x ∼ 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. © 2008 Springer-Verlag / Società Italiana di Fisica.	en
heal.publisher	SPRINGER	en
heal.journalName	European Physical Journal C	en
dc.identifier.doi	10.1140/epjc/s10052-008-0544-3	en
dc.identifier.isi	ISI:000254206800004	en
dc.identifier.volume	54	en
dc.identifier.issue	3	en
dc.identifier.spage	389	en
dc.identifier.epage	409	en