Measurement of beauty and charm production in deep inelastic scattering at HERA and measurement of the beauty-quark mass
Articolo
Data di Pubblicazione:
2014
Abstract:
The production of beauty and charm quarks in ep interactions has been studied with the ZEUS detector at HERA for exchanged four-momentum squared 5 < Q2 < 1000 GeV2 using an integrated luminosity of 354 pb(-1). The beauty and charm content in events with at least one jet have been extracted using the invariant mass of charged tracks associated with secondary vertices and the decay-length significance of these vertices. Differential cross sections as a function of Q2, Bjorken x, jet transverse energy and pseudorapidity were measured and compared with next-to-leading-order QCD calculations. The beauty and charm contributions to the proton structure functions were extracted from the double-differential cross section as a function of x and Q2. The running beauty-quark mass, m(b) at the scale m(b), was determined from a QCD fit at next-to-leading order to HERA data for the first time and found to be m(b) (m(b)) = 4.07 +/- 0.14 (fit)(-0.07)(+0.01) (mod.)(-0.00)(+0.05) (param.)(-0.05)(+0.08) (theo.) GeV.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
HERA; ZEUS
Elenco autori:
H. Abramowicz;I. Abt;L. Adamczyk;M. Adamus;R. Aggarwal;S. Antonelli;O. Arslan;V. Aushev;Y. Aushev;O. Bachynska;A. N. Barakbaev;N. Bartosik;O. Behnke;J. Behr;U. Behrens;A. Bertolin;S. Bhadra;I. Bloch;V. Bokhonov;E. G. Boos;K. Borras;I. Brock;R. Brugnera;A. Bruni;B. Brzozowska;P. J. Bussey;A. Caldwell;M. Capua;C. D. Catterall;J. Chwastowski;J. Ciborowski;R. Ciesielski;A. M. Cooper-Sarkar;M. Corradi;F. Corriveau;G. D’Agostini;R. K. Dementiev;R. C. E. Devenish;G. Dolinska;V. Drugakov;S. Dusini;J. Ferrando;J. Figiel;B. Foster;G. Gach;A. Garfagnini;A. Geiser;A. Gizhko;L. K. Gladilin;O. Gogota;Yu. A. Golubkov;J. Grebenyuk;I. Gregor;G. Grzelak;O. Gueta;M. Guzik;W. Hain;G. Hartner;D. Hochman;R. Hori;Z. A. Ibrahim;Y. Iga;M. Ishitsuka;A. Iudin;F. Januschek;I. Kadenko;S. Kananov;T. Kanno;U. Karshon;M. Kaur;P. Kaur;L. A. Khein;D. Kisielewska;R. Klanner;U. Klein;N. Kondrashova;O. Kononenko;Ie. Korol;I. A. Korzhavina;A. Kotanski;U. Kötz;N. Kovalchuk;H. Kowalski;O. Kuprash;M. Kuze;B. B. Levchenko;A. Levy;V. Libov;S. Limentani;M. Lisovyi;E. Lobodzinska;W. Lohmann;B. Löhr;E. Lohrmann;A. Longhin;D. Lontkovskyi;O. Yu. Lukina;J. Maeda;I. Makarenko;J. Malka;J. F. Martin;S. Mergelmeyer;F. Mohamad Idris;K. Mujkic;V. Myronenko;K. Nagano;A. Nigro;T. Nobe;D. Notz;R. J. Nowak;K. Olkiewicz;Yu. Onishchuk;E. Paul;W. Perlanski;H. Perrey;N. S. Pokrovskiy;A. S. Proskuryakov;M. Przybycien;A. Raval;P. Roloff;I. Rubinsky;M. Ruspa;V. Samojlov;D. H. Saxon;M. Schioppa;W. B. Schmidke;U. Schneekloth;T. Schörner-Sadenius;J. Schwartz;L. M. Shcheglova;R. Shehzadi;R. Shevchenko;O. Shkola;I. Singh;I. O. Skillicorn;W. Slominski;V. Sola;A. Solano;A. Spiridonov;L. Stanco;N. Stefaniuk;A. Stern;T. P. Stewart;P. Stopa;J. Sztuk-Dambietz;D. Szuba;J. Szuba;E. Tassi;T. Temiraliev;K. Tokushuku;J. Tomaszewska;A. Trofymov;V. Trusov;T. Tsurugai;M. Turcato;O. Turkot;T. Tymieniecka;A. Verbytskyi;O. Viazlo;R. Walczak;W. A. T. Wan Abdullah;K. Wichmann;M. Wing;G. Wolf;S. Yamada;Y. Yamazaki;N. Zakharchuk;A. F. Żarnecki;L. Zawiejski;O. Zenaiev;B. O. Zhautykov;N. Zhmak;D. S. Zotkin
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