Mean values and differential distributions of event-shape variables have been studied in neutral current deep inelastic scattering using an integrated luminosity of 82.2 pb−1 collected with the ZEUS detector at HERA. The kinematic range is and 0.0024<x<0.6, where Q2 is the virtuality of the exchanged boson and x is the Bjorken variable. The data are compared with a model based on a combination of next-to-leading-order QCD calculations with next-to-leading-logarithm corrections and the Dokshitzer–Webber non-perturbative power corrections. The power-correction method provides a reasonable description of the data for all event-shape variables studied. Nevertheless, the lack of consistency of the determination of αs and of the non-perturbative parameter of the model, , suggests the importance of higher-order processes that are not yet included in the model.

Event shapes in deep inelastic scattering at HERA.

MONACO, Vincenzo;SACCHI, Roberto;SOLANO, Ada Maria;
2007-01-01

Abstract

Mean values and differential distributions of event-shape variables have been studied in neutral current deep inelastic scattering using an integrated luminosity of 82.2 pb−1 collected with the ZEUS detector at HERA. The kinematic range is and 0.0024
2007
767
1
28
http://dx.doi.org/10.1016/j.nuclphysb.2006.05.016
High Energy Physics; HERA; ZEUS Collaboration
S. Chekanov;M. Derrick;S. Magill;S. Miglioranzi;B. Musgrave;D. Nicholass;J. Repond;R. Yoshida;M. C. K.;N. Pavel;A. G. Y.;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. D. Pasquale;G. Iacobucci;A. Margotti;R. Nania;A. Polini;L. Rinaldi;G. Sartorelli;A. Zichichi;G. Aghuzumtsyan;D. Bartsch;I. Brock;S. Goers;H. Hartmann;E. Hilger;H. P. Jakob;M. Jungst;O. M. Kind;E. Paul;J. Rautenberg;R. Renner;U. Samson;V. Schonberg;M. Wang;M. Wlasenko;N. H. Brook;G. P. Heath;J. D. Morris;T. Namsoo;M. Capua;S. Fazio;A. Mastroberardino;M. Schioppa;G. Susinno;E. Tassi;J. Y. Kim;K. J. Ma;Z. A. Ibrahim;B. Kamaluddin;W. A. T.;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. Adler;U. Behrens;I. Bloch;A. Bonato;K. Borras;N. Coppola;J. Fourletova;A. Geiser;D. Gladkov;P. Goettlicher;I. Gregor;O. Gutsche;T. Haas;W. Hain;C. Horn;B. Kahle;U. Kotz;H. Kowalski;H. Lim;E. Lobodzinska;B. Lohr;R. Mankel;I. A. Melzer-Pellmann;A. Montanari;C. N. Nguyen;D. Notz;A. E. Nuncio-Quiroz;R. Santamarta;U. Schneekloth;H. Stadie;U. Stosslein;D. Szuba;J. Szuba;T. Theedt;G. Watt;G. Wolf;K. Wrona;C. Youngman;W. Zeuner;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;J. Ferrando;S. Hanlon;D. H. Saxon;I. O. Skillicorn;I. Gialas;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;A. Dossanov;N. S. Pokrovskiy;B. O. Zhautykov;D. Son;J. d. Favereau;K. Piotrzkowski;F. Barreiro;C. Glasman;M. Jimenez;L. Labarga;J. d. Peso;E. Ron;J. Terron;M. Zambrana;F. Corriveau;C. Liu;R. Walsh;C. Zhou;T. Tsurugai;A. Antonov;B. A. Dolgoshein;I. Rubinsky;V. Sosnovtsev;A. Stifutkin;S. Suchkov;R. K. Dementiev;R. Ermolov;L. K. Gladilin;I. I. Katkov;L. A. Khein;I. A. Korzhavina;V. A. Kuzmin;B. B. Levchenko;O. Y. Lukina;A. S. Proskuryakov;L. M. Shcheglova;D. S. Zotkin;S. A. Zotkin;I. Abt;C. Buttner;A. Caldwell;D. Kollar;X. Liu;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;A. Cottrell;R. C. E.;B. Foster;C. Gwenlan;K. Korcsak-Gorzo;S. Patel;V. Roberfroid;A. Robertson;P. B. Straub;C. Uribe-Estrada;R. Walczak;P. Bellan;A. Bertolin;R. Brugnera;R. Carlin;R. Ciesielski;F. D. Corso;S. Dusini;A. Garfagnini;S. Limentani;A. Longhin;L. Stanco;M. Turcato;B. Y. Oh;A. Raval;J. J. Whitmore;Y. Iga;G. D'Agostini;G. Marini;A. Nigro;J. E. Cole;J. C. Hart;H. Abramowicz;A. Gabareen;R. Ingbir;S. Kananov;A. Levy;M. Kuze;R. Hori;S. Kagawa;S. Shimizu;T. Tawara;R. Hamatsu;H. Kaji;S. Kitamura;O. Ota;Y. D. Ri;M. I. Ferrero;V. Monaco;R. Sacchi;A. Solano;M. Arneodo;M. Ruspa;S. Fourletov;J. F. Martin;J. M. Butterworth;R. Hall-Wilton;T. W. Jones;J. H. Loizides;M. R. Sutton;C. Targett-Adams;M. Wing;B. Brzozowska;J. Ciborowski;G. Grzelak;P. Kulinski;P. Luzniak;J. Malka;R. J. Nowak;J. M. Pawlak;T. Tymieniecka;A. Ukleja;J. Ukleja;A. F. Zarnecki;M. Adamus;P. Plucinski;Y. Eisenberg;I. Giller;D. Hochman;U. Karshon;E. Brownson;T. Danielson;A. Everett;D. Kcira;D. D. Reeder;M. Rosin;P. Ryan;A. A. Savin;W. H. Smith;H. Wolfe;S. Bhadra;C. D. Catterall;Y. Cui;G. Hartner;S. Menary;U. Noor;M. Soares;J. Standage;J. Whyte
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