Three- and four-jet final states in photoproduction at HERA

Chekanov, S.; Derrick, M.; Magill, S.; Musgrave, B.; Nicholass, D.; Repond, J.; Yoshida, R.; Mattingly, M. C. K.; Jechow, M.; Pavel, N.; Molina, Agy; Antonelli, S.; Antonioli, P.; Bari, G.; Basile, M.; Bellagamba, L.; Bindi, M.; Boscherini, D.; Bruni, A.; Bruni, G.; Cifarelli, L.; Cindolo, F.; Contin, A.; Corradi, M.; De Pasquale, S.; Iacobucci, G.; Margotti, A.; Nania, R.; Polini, A.; Sartorelli, G.; Zichichi, A.; Bartsch, D.; Brock, I.; Hartmann, H.; Hilger, E.; Jakob, H. P.; Jungst, M.; Kind, O. M.; Nuncio Quiroz, A. E.; Paul, E.; Renner, R.; Samson, U.; Schonberg, V.; Shehzadi, R.; Wlasenko, M.; Brook, N. H.; Heath, G. P.; Morris, J. D.; Capua, M.; Fazio, S.; Mastroberardino, A.; Schioppa, M.; Susinno, G.; Tassi, E.; Kim, J. Y.; K. J., Ma; Ibrahim, Z. A.; Kamaluddin, B.; Abdullah, Watw; Ning, Y.; Ren, Z.; Sciulli, F.; Chwastowski, J.; Eskreys, A.; Figiel, J.; Galas, A.; Gil, M.; Olkiewicz, K.; Stopa, P.; Zawiejski, L.; Adamczyk, L.; Bold, T.; Grabowska Bold, I.; Kisielewska, D.; Lukasik, J.; Przybycien, M.; Suszycki, L.; Kotanski, A.; Slominski, W.; Alder, V.; Behrens, U.; Bloch, I.; Blohm, C.; Bonato, A.; Borras, K.; Ciesielski, R.; Coppola, N.; Dossanov, A.; Drugakov, V.; Fourletova, J.; Geiser, A.; Gladkov, D.; Gottlicher, P.; Grebenyuk, J.; Gregor, I.; Haas, T.; Hain, W.; Horn, C.; Huttmann, A.; Kahle, B.; Katkov, I. I.; Klein, U.; Kotz, U.; Kowalski, H.; Lobodzinska, E.; Lohr, B.; Mankel, R.; Melzer Pellmann, I. A.; Miglioranzi, S.; Montanari, A.; Namsoo, T.; Notz, D.; Rinaldi, L.; Roloff, P.; Rubinsky, I.; Santamarta, R.; Schneekloth, U.; Spiridonov, A.; Stadie, H.; Szuba, D.; Szuba, J.; Theedt, T.; Wolf, G.; Wrona, K.; Youngman, C.; Zeuner, W.; Lohmann, W.; Schlenstedt, S.; Barbagli, G.; Gallo, E.; Pelfer, P. G.; Bamberger, A.; Dobur, D.; Karstens, F.; Vlasov, N. N.; Bussey, P. J.; Doyle, A. T.; Dunne, W.; Forrest, M.; Saxon, D. H.; Skillicorn, I. O.; Gialas, I.; Papageorgiu, K.; Gosau, T.; Holm, U.; Klanner, R.; Lohrmann, E.; Salehi, H.; Schleper, P.; Schorner Sadenius, T.; Sztuk, J.; Wichmann, K.; Wick, K.; Foudas, C.; Fry, C.; Long, K. R.; Tapper, A. D.; Kataoka, M.; Matsumoto, T.; Nagano, K.; Tokushuku, K.; Yamada, S.; Yamazaki, Y.; Barakbaev, A. N.; Boos, E. G.; Pokrovskiy, N. S.; Zhautykov, B. O.; Aushev, V.; Borodin, M.; Kozulia, A.; Lisovyi, M.; Son, D.; De Favereau, J.; Piotrzkowski, K.; Barreiro, F.; Glasman, C.; Jimenez, M.; Labarga, L.; Del Peso, J.; Ron, E.; Soares, M.; Terron, J.; Zambrana, M.; Corriveau, F.; Liu, C.; Walsh, R.; Zhou, C.; Tsurugai, T.; Antonov, A.; Dolgoshein, B. A.; Sosnovtsev, V.; Stifutkin, A.; Suchkov, S.; Dementiev, R. K.; Ermolov, P. F.; Gladilin, L. K.; Khein, L. A.; Korzhavina, I. A.; Kuzmin, V. A.; Levchenko, B. B.; Yu Lukina, O.; Proskuryakov, A. S.; Shcheglova, L. M.; Zotkin, D. S.; Zotkin, S. A.; Abt, I.; Buttner, C.; Caldwell, A.; Kollar, D.; Schmidke, W. B.; Sutiak, J.; Grigorescu, G.; Keramidas, A.; Koffeman, E.; Kooijman, P.; Pellegrino, A.; Tiecke, H.; Vazquez, M.; Wiggers, L.; Brummer, N.; Bylsma, B.; Durkin, L. S.; Lee, A.; Ling, T. Y.; Allfrey, P. D.; Bell, M. A.; Cooper Sarkar, A. M.; Devenish, R. C. E.; Ferrando, J.; Foster, B.; Korcsak Gorzo, K.; Oliver, K.; Patel, S.; Roberfroid, V.; Robertson, A.; Straub, P. B.; Uribe Estrada, C.; Walczak, R.; Bellan, P.; Bertolin, A.; Brugnera, R.; Carlin, R.; Dal Corso, F.; Dusini, S.; Garfagnini, A.; Limentani, S.; Longhin, A.; Stanco, L.; Turcato, M.; B. Y., Oh; Raval, A.; Ukleja, J.; Whitmore, J. J.; Iga, Y.; D'Agostini, Giulio; Marini, G.; Nigro, Andrea; Cole, J. E.; Hart, J. C.; Abramowicz, H.; Gabareen, A.; Ingbir, R.; Kananov, S.; Levy, A.; Kuze, M.; Maeda, J.; Hori, R.; Kagawa, S.; Okazaki, N.; Shimizu, S.; Tawara, T.; Hamatsu, R.; Kaji, H.; Kitamura, S.; Ota, O.; Y. D., Ri; Ferrero, M. L.; Monaco, V.; Sacchi, R.; Solano, A.; Arneodo, M.; Ruspa, M.; Fourletov, S.; Martin, J. F.; Boutle, S. K.; Butterworth, J. M.; Gwenlan, C.; Jones, T. W.; Loizides, J. H.; Sutton, M. R.; Wing, M.; Brzozowska, B.; Ciborowski, J.; Grzelak, G.; Kulinski, P.; Luzniak, P.; Malka, J.; Nowak, R. J.; Pawlak, J. M.; Tymieniecka, T.; Ukleja, A.; Zarnecki, A. F.; Adamus, M.; Plucinski, P.; Eisenberg, Y.; Giller, I.; Hochman, D.; Karshon, U.; Rosin, M.; Brownson, E.; Danielson, T.; Everett, A.; Kcira, D.; Reeder, D. D.; Ryan, P.; Savin, A. A.; Smith, W. H.; Wolfe, H.; Bhadra, S.; Catterall, C. D.; Cui, Y.; Hartner, G.; Menary, S.; Noor, U.; Standage, J.; Whyte, J.

doi:10.1016/j.nuclphysb.2007.08.021

Three- and four-jet final states have been measured in photoproduction at HERA using the ZEUS detector with an integrated luminosity of 121 pb(-1). The results are presented for jets with transverse energy E(T)(jet)> 6 GeV and pseudorapidity vertical bar eta(jet)vertical bar < 2.4, in the kinematic region given by the virtuality of the photon Q(2)<1 GeV(2) and the inelasticity 0.2 <= y <= 0.85 and in two mass regions defined as 25 <= M(nj)< 50 GeV and M(nj)>= 50 GeV, where M(nj) is the invariant mass of the n-jet system. The four-jet photoproduction cross section has been measured for the first time and represents the highest-order process studied at HERA. Both the three- and four-jet cross sections have been compared with leading-logarithmic parton-shower Monte Carlo models, with and without multi-parton interactions. The three-jet cross sections have been compared to an O(alpha alpha(2)(s)) perturbative QCD calculation. (c) 2007 Elsevier B.V. All rights reserved.

Three- and four-jet final states in photoproduction at HERA / S., C., M., D., S., M., B., M., D., N., J., R., R., Y., M. C. K., M., M., J., N., P., Agy, M., S., A., P., A., G., B., M., B., L., B., M., B., D., B., A., B., G., B., et al.. - In: NUCLEAR PHYSICS. B. - ISSN 0550-3213. - 792:1-2(2008), pp. 1-47. [10.1016/j.nuclphysb.2007.08.021]

Three- and four-jet final states in photoproduction at HERA

S. Chekanov;M. Derrick;S. Magill;B. Musgrave;D. Nicholass;J. Repond;R. Yoshida;M. C. K. Mattingly;M. Jechow;N. Pavel;Agy Molina;S. Antonelli;P. Antonioli;G. Bari;M. Basile;L. Bellagamba;M. Bindi;D. Boscherini;A. Bruni;G. Bruni;L. Cifarelli;F. Cindolo;A. Contin;M. Corradi;S. De Pasquale;G. Iacobucci;A. Margotti;R. Nania;A. Polini;G. Sartorelli;A. Zichichi;D. Bartsch;I. Brock;H. Hartmann;E. Hilger;H. P. Jakob;M. Jungst;O. M. Kind;A. E. Nuncio Quiroz;E. Paul;R. Renner;U. Samson;V. Schonberg;R. Shehzadi;M. Wlasenko;N. H. Brook;G. P. Heath;J. D. Morris;M. Capua;S. Fazio;A. Mastroberardino;M. Schioppa;G. Susinno;E. Tassi;J. Y. Kim;K. J. Ma;Z. A. Ibrahim;B. Kamaluddin;Watw Abdullah;Y. Ning;Z. Ren;F. Sciulli;J. Chwastowski;A. Eskreys;J. Figiel;A. Galas;M. Gil;K. Olkiewicz;P. Stopa;L. Zawiejski;L. Adamczyk;T. Bold;I. Grabowska Bold;D. Kisielewska;J. Lukasik;M. Przybycien;L. Suszycki;A. Kotanski;W. Slominski;V. Alder;U. Behrens;I. Bloch;C. Blohm;A. Bonato;K. Borras;R. Ciesielski;N. Coppola;A. Dossanov;V. Drugakov;J. Fourletova;A. Geiser;D. Gladkov;P. Gottlicher;J. Grebenyuk;I. Gregor;T. Haas;W. Hain;C. Horn;A. Huttmann;B. Kahle;I. I. Katkov;U. Klein;U. Kotz;H. Kowalski;E. Lobodzinska;B. Lohr;R. Mankel;I. A. Melzer Pellmann;S. Miglioranzi;A. Montanari;T. Namsoo;D. Notz;L. Rinaldi;P. Roloff;I. Rubinsky;R. Santamarta;U. Schneekloth;A. Spiridonov;H. Stadie;D. Szuba;J. Szuba;T. Theedt;G. Wolf;K. Wrona;C. Youngman;W. Zeuner;W. Lohmann;S. Schlenstedt;G. Barbagli;E. Gallo;P. G. Pelfer;A. Bamberger;D. Dobur;F. Karstens;N. N. Vlasov;P. J. Bussey;A. T. Doyle;W. Dunne;M. Forrest;D. H. Saxon;I. O. Skillicorn;I. Gialas;K. Papageorgiu;T. Gosau;U. Holm;R. Klanner;E. Lohrmann;H. Salehi;P. Schleper;T. Schorner Sadenius;J. Sztuk;K. Wichmann;K. Wick;C. Foudas;C. Fry;K. R. Long;A. D. Tapper;M. Kataoka;T. Matsumoto;K. Nagano;K. Tokushuku;S. Yamada;Y. Yamazaki;A. N. Barakbaev;E. G. Boos;N. S. Pokrovskiy;B. O. Zhautykov;V. Aushev;M. Borodin;A. Kozulia;M. Lisovyi;D. Son;J. De Favereau;K. Piotrzkowski;F. Barreiro;C. Glasman;M. Jimenez;L. Labarga;J. Del Peso;E. Ron;M. Soares;J. Terron;M. Zambrana;F. Corriveau;C. Liu;R. Walsh;C. Zhou;T. Tsurugai;A. Antonov;B. A. Dolgoshein;V. Sosnovtsev;A. Stifutkin;S. Suchkov;R. K. Dementiev;P. F. Ermolov;L. K. Gladilin;L. A. Khein;I. A. Korzhavina;V. A. Kuzmin;B. B. Levchenko;O. Yu Lukina;A. S. Proskuryakov;L. M. Shcheglova;D. S. Zotkin;S. A. Zotkin;I. Abt;C. Buttner;A. Caldwell;D. Kollar;W. B. Schmidke;J. Sutiak;G. Grigorescu;A. Keramidas;E. Koffeman;P. Kooijman;A. Pellegrino;H. Tiecke;M. Vazquez;L. Wiggers;N. Brummer;B. Bylsma;L. S. Durkin;A. Lee;T. Y. Ling;P. D. Allfrey;M. A. Bell;A. M. Cooper Sarkar;R. C. E. Devenish;J. Ferrando;B. Foster;K. Korcsak Gorzo;K. Oliver;S. Patel;V. Roberfroid;A. Robertson;P. B. Straub;C. Uribe Estrada;R. Walczak;P. Bellan;A. Bertolin;R. Brugnera;R. Carlin;F. Dal Corso;S. Dusini;A. Garfagnini;S. Limentani;A. Longhin;L. Stanco;M. Turcato;B. Y. Oh;A. Raval;J. Ukleja;J. J. Whitmore;Y. Iga;D'AGOSTINI, Giulio;G. Marini;NIGRO, Andrea;J. E. Cole;J. C. Hart;H. Abramowicz;A. Gabareen;R. Ingbir;S. Kananov;A. Levy;M. Kuze;J. Maeda;R. Hori;S. Kagawa;N. Okazaki;S. Shimizu;T. Tawara;R. Hamatsu;H. Kaji;S. Kitamura;O. Ota;Y. D. Ri;M. L. Ferrero;V. Monaco;R. Sacchi;A. Solano;M. Arneodo;M. Ruspa;S. Fourletov;J. F. Martin;S. K. Boutle;J. M. Butterworth;C. Gwenlan;T. W. Jones;J. H. Loizides;M. R. Sutton;M. Wing;B. Brzozowska;J. Ciborowski;G. Grzelak;P. Kulinski;P. Luzniak;J. Malka;R. J. Nowak;J. M. Pawlak;T. Tymieniecka;A. Ukleja;A. F. Zarnecki;M. Adamus;P. Plucinski;Y. Eisenberg;I. Giller;D. Hochman;U. Karshon;M. Rosin;E. Brownson;T. Danielson;A. Everett;D. Kcira;D. D. Reeder;P. Ryan;A. A. Savin;W. H. Smith;H. Wolfe;S. Bhadra;C. D. Catterall;Y. Cui;G. Hartner;S. Menary;U. Noor;J. Standage;J. Whyte

2008

Abstract

Three- and four-jet final states have been measured in photoproduction at HERA using the ZEUS detector with an integrated luminosity of 121 pb(-1). The results are presented for jets with transverse energy E(T)(jet)> 6 GeV and pseudorapidity vertical bar eta(jet)vertical bar < 2.4, in the kinematic region given by the virtuality of the photon Q(2)<1 GeV(2) and the inelasticity 0.2 <= y <= 0.85 and in two mass regions defined as 25 <= M(nj)< 50 GeV and M(nj)>= 50 GeV, where M(nj) is the invariant mass of the n-jet system. The four-jet photoproduction cross section has been measured for the first time and represents the highest-order process studied at HERA. Both the three- and four-jet cross sections have been compared with leading-logarithmic parton-shower Monte Carlo models, with and without multi-parton interactions. The three-jet cross sections have been compared to an O(alpha alpha(2)(s)) perturbative QCD calculation. (c) 2007 Elsevier B.V. All rights reserved.

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	Anno di pubblicazione
	
				2008
			
	Parole chiave
	
				jets; multi-parton interactions; photoproduction; qcd
			
	Tipologia
	
				01 Pubblicazione su rivista::01a Articolo in rivista
			
	Citazione
	
				Three- and four-jet final states in photoproduction at HERA / S., C., M., D., S., M., B., M., D., N., J., R., R., Y., M. C. K., M., M., J., N., P., Agy, M., S., A., P., A., G., B., M., B., L., B., M., B., D., B., A., B., G., B., et al.. - In: NUCLEAR PHYSICS. B. - ISSN 0550-3213. - 792:1-2(2008), pp. 1-47. [10.1016/j.nuclphysb.2007.08.021]
			
	Appartiene alla tipologia:
	
				01a Articolo in rivista

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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/360400

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