The production of the neutral strange hadrons K^0_S, Λ and antiΛ has been measured in ep collisions at HERA using the ZEUS detector. Cross sections, baryon-to-meson ratios, relative yields of strange and charged light hadrons, Λ (antiΛ) asymmetry and polarization have been measured in three kinematic regions: Q^2 > 25 GeV2; 5 < Q^2 < 25 GeV2; and in photoproduction (Q^2≃0). In photoproduction the presence of two hadronic jets, each with at least 5 GeV transverse energy, was required. The measurements agree in general with Monte Carlo models and are consistent with measurements made at e+e- colliders, except for an enhancement of baryon relative to meson production in photoproduction.

Measurement of K^0_s, Lambda, Antilambda production at HERA

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

Abstract

The production of the neutral strange hadrons K^0_S, Λ and antiΛ has been measured in ep collisions at HERA using the ZEUS detector. Cross sections, baryon-to-meson ratios, relative yields of strange and charged light hadrons, Λ (antiΛ) asymmetry and polarization have been measured in three kinematic regions: Q^2 > 25 GeV2; 5 < Q^2 < 25 GeV2; and in photoproduction (Q^2≃0). In photoproduction the presence of two hadronic jets, each with at least 5 GeV transverse energy, was required. The measurements agree in general with Monte Carlo models and are consistent with measurements made at e+e- colliders, except for an enhancement of baryon relative to meson production in photoproduction.
2007
51
1
23
http://dx.doi.org/10.1140/epjc/s10052-007-0299-2
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.;M. Jechow;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;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;R. Shehzadi;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. S. Lominski;V. Adler;U. Behrens;I. Bloch;A. Bonato;K. Borras;N. Coppola;J. Fourletova;A. Geiser;D. Gladkov;P. Gottlicher;I. Gregor;T. Haas;W. Hain;C. Horn;B. Kahle;U. Koetz;H. Kowalski;E. Lobodzinska;B. Lohr;R. Mankel;I. A. Melzer-Pellmann;A. Montanari;D. Notz;A. E. Nuncio-Quiroz;R. Santamarta;U. Schneekloth;A. Spiridonov;H. Stadie;U. Stosslein;D. Szuba;J. Szuba;T. Theedt;G. Wolf;K. Wrona;C. Youngman;W. Zeuner;W. Lohmann;S. Schlenstedt;G. Barbagli;E. Gallo;G. Pelfer;A. Bamberger;D. Dobur;F. Karstens;N. N. Vlasov;P. J. Bussey;A. T. Doyle;W. Dunne;J. Ferrando;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;M. Soares;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;P. F. 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;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;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. Ukleja;J. J. Whitmore;Y. Iga;G. D'Agostini;G. Marini;A. Nigro;E. Cole;J. C. Hart;H. Abramowicz;A. Gabareen;R. Ingbir;S. Kananov;A. Levy;M. Kuze;R. Hori;S. Kagawa;N. Okazaki;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;K. Boutle;J. M. Butterworth;C. Gwenlan;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;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
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/49159
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