A search for first-generation leptoquarks was performed in electron-proton and positron-proton collisions recorded with the ZEUS detector at HERA in 2003-2007 using an integrated luminosity of 366 pb(-1). Final states with an electron and jets or with missing transverse momentum and jets were analyzed, searching for resonances or other deviations from the standard model predictions. No evidence for any leptoquark signal was found. The data were combined with data previously taken at HERA, resulting in a total integrated luminosity of 498 pb(-1). Limits on the Yukawa coupling, lambda, of leptoquarks were set as a function of the leptoquark mass for different leptoquark types within the Buchmuller-Ruckl-Wyler model. Leptoquarks with a coupling lambda = 0.3 are excluded for masses up to 699 GeV.

Search for first-generation leptoquarks at HERA / H. Abramowicz;I. Abt;L. Adamczyk;M. Adamus;R. Aggarwal;S. Antonelli;P. Antonioli;A. Antonov;M. Arneodo;O. Arslan;V. Aushev;Y. Aushev;O. Bachynska;A. Bamberger;A. Barakbaev;G. Barbagli;G. Bari;F. Barreiro;N. Bartosik;D. Bartsch;M. Basile;O. Behnke;J. Behr;U. Behrens;L. Bellagamba;A. Bertolin;S. Bhadra;M. Bindi;C. Blohm;V. Bokhonov;T. Bołd;K. Bondarenko;E. Boos;K. Borras;D. Boscherini;D. Bot;I. Brock;E. Brownson;R. Brugnera;N. Brümmer;A. Bruni;G. Bruni;B. Brzozowska;P. Bussey;B. Bylsma;A. Caldwell;M. Capua;R. Carlin;C. Catterall;S. Chekanov;J. Chwastowski;J. Ciborowski;R. Ciesielski;L. Cifarelli;F. Cindolo;A. Contin;A. Cooper-Sarkar;N. Coppola;M. Corradi;F. Corriveau;M. Costa;G. D’Agostini;F. Dal Corso;J. del Peso;R. Dementiev;S. De Pasquale;M. Derrick;R. Devenish;D. Dobur;B. Dolgoshein;G. Dolinska;A. Doyle;V. Drugakov;L. Durkin;S. Dusini;Y. Eisenberg;P. Ermolov;A. Eskreys;S. Fang;S. Fazio;J. Ferrando;M. Ferrero;J. Figiel;M. Forrest;B. Foster;G. Gach;A. Galas;E. Gallo;A. Garfagnini;A. Geiser;I. Gialas;A. Gizhko;L. Gladilin;D. Gladkov;C. Glasman;O. Gogota;Yu. Golubkov;P. Göttlicher;I. Grabowska-Bołd;J. Grebenyuk;I. Gregor;G. Grigorescu;G. Grzelak;O. Gueta;M. Guzik;C. Gwenlan;T. Haas;W. Hain;R. Hamatsu;J. Hart;H. Hartmann;G. Hartner;E. Hilger;D. Hochman;R. Hori;K. Horton;A. Hüttmann;Z. Ibrahim;Y. Iga;R. Ingbir;M. Ishitsuka;H.-P. Jakob;F. Januschek;T. Jones;M. Jüngst;I. Kadenko;B. Kahle;S. Kananov;T. Kanno;U. Karshon;F. Karstens;I. Katkov;M. Kaur;P. Kaur;A. Keramidas;L. Khein;J. Kim;D. Kisielewska;S. Kitamura;R. Klanner;U. Klein;E. Koffeman;N. Kondrashova;O. Kononenko;P. Kooijman;Ie. Korol;I. Korzhavina;A. Kotański;U. Kötz;H. Kowalski;O. Kuprash;M. Kuze;A. Lee;B. Levchenko;A. Levy;V. Libov;S. Limentani;T. Ling;M. Lisovyi;E. Lobodzinska;W. Lohmann;B. Löhr;E. Lohrmann;K. Long;A. Longhin;D. Lontkovskyi;O. Lukina;J. Maeda;S. Magill;I. Makarenko;J. Malka;R. Mankel;A. Margotti;G. Marini;J. Martin;A. Mastroberardino;M. Mattingly;I.-A. Melzer-Pellmann;S. Mergelmeyer;S. Miglioranzi;F. Mohamad dris;V. Monaco;A. Montanari;J. Morris;K. Mujkic;B. Musgrave;K. Nagano;T. Namsoo;R. Nania;A. Nigro;Y. Ning;T. Nobe;D. Notz;R. Nowak;A. Nuncio-Quiroz;B. Oh;N. Okazaki;K. Oliver;K. Olkiewicz;Yu. Onishchuk;K. Papageorgiu;A. Parenti;E. Paul;J. Pawlak;B. Pawlik;P. Pelfer;A. Pellegrino;W. Perlański;H. Perrey;K. Piotrzkowski;P. Pluciński;N. Pokrovskiy;A. Polini;A. Proskuryakov;M. Przybycień;A. Raval;D. Reeder;B. Reisert;Z. Ren;J. Repond;Y. Ri;A. Robertson;P. Roloff;I. Rubinsky;M. Ruspa;R. Sacchi;U. Samson;G. Sartorelli;A. Savin;D. Saxon;M. Schioppa;S. Schlenstedt;P. Schleper;W. Schmidke;U. Schneekloth;V. Schönberg;T. Schörner-Sadenius;J. Schwartz;F. Sciulli;L. Shcheglova;R. Shehzadi;S. Shimizu;I. Singh;I. Skillicorn;W. Słomiński;W. Smith;V. Sola;A. Solano;D. Son;V. Sosnovtsev;A. Spiridonov;H. Stadie;L. Stanco;N. Stefaniuk;A. Stern;T. Stewart;A. Stifutkin;P. Stopa;S. Suchkov;G. Susinno;L. Suszycki;J. Sztuk-Dambietz;D. Szuba;J. Szuba;A. Tapper;E. Tassi;J. Terrón;T. Theedt;H. Tiecke;K. Tokushuku;J. Tomaszewska;V. Trusov;T. Tsurugai;M. Turcato;O. Turkot;T. Tymieniecka;M. Vázquez;A. Verbytskyi;O. Viazlo;N. Vlasov;R. Walczak;W. Wan Abdullah;J. Whitmore;K. Wichmann;L. Wiggers;M. Wing;M. Wlasenko;G. Wolf;H. Wolfe;K. Wrona;A. Yagües-Molina;S. Yamada;Y. Yamazaki;R. Yoshida;C. Youngman;O. Zabiegalov;A. Żarnecki;L. Zawiejski;O. Zenaiev;W. Zeuner;B. Zhautykov;N. Zhmak;C. Zhou;A. Zichichi;Z. Zolkapli;D. Zotkin. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - STAMPA. - 86:(2012), pp. 012005.1-012005.14. [10.1103/PhysRevD.86.012005]

Search for first-generation leptoquarks at HERA

BASILE, MAURIZIO;CIFARELLI, LUISA;CONTIN, ANDREA;SARTORELLI, GABRIELLA;
2012

Abstract

A search for first-generation leptoquarks was performed in electron-proton and positron-proton collisions recorded with the ZEUS detector at HERA in 2003-2007 using an integrated luminosity of 366 pb(-1). Final states with an electron and jets or with missing transverse momentum and jets were analyzed, searching for resonances or other deviations from the standard model predictions. No evidence for any leptoquark signal was found. The data were combined with data previously taken at HERA, resulting in a total integrated luminosity of 498 pb(-1). Limits on the Yukawa coupling, lambda, of leptoquarks were set as a function of the leptoquark mass for different leptoquark types within the Buchmuller-Ruckl-Wyler model. Leptoquarks with a coupling lambda = 0.3 are excluded for masses up to 699 GeV.
2012
Search for first-generation leptoquarks at HERA / H. Abramowicz;I. Abt;L. Adamczyk;M. Adamus;R. Aggarwal;S. Antonelli;P. Antonioli;A. Antonov;M. Arneodo;O. Arslan;V. Aushev;Y. Aushev;O. Bachynska;A. Bamberger;A. Barakbaev;G. Barbagli;G. Bari;F. Barreiro;N. Bartosik;D. Bartsch;M. Basile;O. Behnke;J. Behr;U. Behrens;L. Bellagamba;A. Bertolin;S. Bhadra;M. Bindi;C. Blohm;V. Bokhonov;T. Bołd;K. Bondarenko;E. Boos;K. Borras;D. Boscherini;D. Bot;I. Brock;E. Brownson;R. Brugnera;N. Brümmer;A. Bruni;G. Bruni;B. Brzozowska;P. Bussey;B. Bylsma;A. Caldwell;M. Capua;R. Carlin;C. Catterall;S. Chekanov;J. Chwastowski;J. Ciborowski;R. Ciesielski;L. Cifarelli;F. Cindolo;A. Contin;A. Cooper-Sarkar;N. Coppola;M. Corradi;F. Corriveau;M. Costa;G. D’Agostini;F. Dal Corso;J. del Peso;R. Dementiev;S. De Pasquale;M. Derrick;R. Devenish;D. Dobur;B. Dolgoshein;G. Dolinska;A. Doyle;V. Drugakov;L. Durkin;S. Dusini;Y. Eisenberg;P. Ermolov;A. Eskreys;S. Fang;S. Fazio;J. Ferrando;M. Ferrero;J. Figiel;M. Forrest;B. Foster;G. Gach;A. Galas;E. Gallo;A. Garfagnini;A. Geiser;I. Gialas;A. Gizhko;L. Gladilin;D. Gladkov;C. Glasman;O. Gogota;Yu. Golubkov;P. Göttlicher;I. Grabowska-Bołd;J. Grebenyuk;I. Gregor;G. Grigorescu;G. Grzelak;O. Gueta;M. Guzik;C. Gwenlan;T. Haas;W. Hain;R. Hamatsu;J. Hart;H. Hartmann;G. Hartner;E. Hilger;D. Hochman;R. Hori;K. Horton;A. Hüttmann;Z. Ibrahim;Y. Iga;R. Ingbir;M. Ishitsuka;H.-P. Jakob;F. Januschek;T. Jones;M. Jüngst;I. Kadenko;B. Kahle;S. Kananov;T. Kanno;U. Karshon;F. Karstens;I. Katkov;M. Kaur;P. Kaur;A. Keramidas;L. Khein;J. Kim;D. Kisielewska;S. Kitamura;R. Klanner;U. Klein;E. Koffeman;N. Kondrashova;O. Kononenko;P. Kooijman;Ie. Korol;I. Korzhavina;A. Kotański;U. Kötz;H. Kowalski;O. Kuprash;M. Kuze;A. Lee;B. Levchenko;A. Levy;V. Libov;S. Limentani;T. Ling;M. Lisovyi;E. Lobodzinska;W. Lohmann;B. Löhr;E. Lohrmann;K. Long;A. Longhin;D. Lontkovskyi;O. Lukina;J. Maeda;S. Magill;I. Makarenko;J. Malka;R. Mankel;A. Margotti;G. Marini;J. Martin;A. Mastroberardino;M. Mattingly;I.-A. Melzer-Pellmann;S. Mergelmeyer;S. Miglioranzi;F. Mohamad dris;V. Monaco;A. Montanari;J. Morris;K. Mujkic;B. Musgrave;K. Nagano;T. Namsoo;R. Nania;A. Nigro;Y. Ning;T. Nobe;D. Notz;R. Nowak;A. Nuncio-Quiroz;B. Oh;N. Okazaki;K. Oliver;K. Olkiewicz;Yu. Onishchuk;K. Papageorgiu;A. Parenti;E. Paul;J. Pawlak;B. Pawlik;P. Pelfer;A. Pellegrino;W. Perlański;H. Perrey;K. Piotrzkowski;P. Pluciński;N. Pokrovskiy;A. Polini;A. Proskuryakov;M. Przybycień;A. Raval;D. Reeder;B. Reisert;Z. Ren;J. Repond;Y. Ri;A. Robertson;P. Roloff;I. Rubinsky;M. Ruspa;R. Sacchi;U. Samson;G. Sartorelli;A. Savin;D. Saxon;M. Schioppa;S. Schlenstedt;P. Schleper;W. Schmidke;U. Schneekloth;V. Schönberg;T. Schörner-Sadenius;J. Schwartz;F. Sciulli;L. Shcheglova;R. Shehzadi;S. Shimizu;I. Singh;I. Skillicorn;W. Słomiński;W. Smith;V. Sola;A. Solano;D. Son;V. Sosnovtsev;A. Spiridonov;H. Stadie;L. Stanco;N. Stefaniuk;A. Stern;T. Stewart;A. Stifutkin;P. Stopa;S. Suchkov;G. Susinno;L. Suszycki;J. Sztuk-Dambietz;D. Szuba;J. Szuba;A. Tapper;E. Tassi;J. Terrón;T. Theedt;H. Tiecke;K. Tokushuku;J. Tomaszewska;V. Trusov;T. Tsurugai;M. Turcato;O. Turkot;T. Tymieniecka;M. Vázquez;A. Verbytskyi;O. Viazlo;N. Vlasov;R. Walczak;W. Wan Abdullah;J. Whitmore;K. Wichmann;L. Wiggers;M. Wing;M. Wlasenko;G. Wolf;H. Wolfe;K. Wrona;A. Yagües-Molina;S. Yamada;Y. Yamazaki;R. Yoshida;C. Youngman;O. Zabiegalov;A. Żarnecki;L. Zawiejski;O. Zenaiev;W. Zeuner;B. Zhautykov;N. Zhmak;C. Zhou;A. Zichichi;Z. Zolkapli;D. Zotkin. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - STAMPA. - 86:(2012), pp. 012005.1-012005.14. [10.1103/PhysRevD.86.012005]
H. Abramowicz;I. Abt;L. Adamczyk;M. Adamus;R. Aggarwal;S. Antonelli;P. Antonioli;A. Antonov;M. Arneodo;O. Arslan;V. Aushev;Y. Aushev;O. Bachynska;A. Bamberger;A. Barakbaev;G. Barbagli;G. Bari;F. Barreiro;N. Bartosik;D. Bartsch;M. Basile;O. Behnke;J. Behr;U. Behrens;L. Bellagamba;A. Bertolin;S. Bhadra;M. Bindi;C. Blohm;V. Bokhonov;T. Bołd;K. Bondarenko;E. Boos;K. Borras;D. Boscherini;D. Bot;I. Brock;E. Brownson;R. Brugnera;N. Brümmer;A. Bruni;G. Bruni;B. Brzozowska;P. Bussey;B. Bylsma;A. Caldwell;M. Capua;R. Carlin;C. Catterall;S. Chekanov;J. Chwastowski;J. Ciborowski;R. Ciesielski;L. Cifarelli;F. Cindolo;A. Contin;A. Cooper-Sarkar;N. Coppola;M. Corradi;F. Corriveau;M. Costa;G. D’Agostini;F. Dal Corso;J. del Peso;R. Dementiev;S. De Pasquale;M. Derrick;R. Devenish;D. Dobur;B. Dolgoshein;G. Dolinska;A. Doyle;V. Drugakov;L. Durkin;S. Dusini;Y. Eisenberg;P. Ermolov;A. Eskreys;S. Fang;S. Fazio;J. Ferrando;M. Ferrero;J. Figiel;M. Forrest;B. Foster;G. Gach;A. Galas;E. Gallo;A. Garfagnini;A. Geiser;I. Gialas;A. Gizhko;L. Gladilin;D. Gladkov;C. Glasman;O. Gogota;Yu. Golubkov;P. Göttlicher;I. Grabowska-Bołd;J. Grebenyuk;I. Gregor;G. Grigorescu;G. Grzelak;O. Gueta;M. Guzik;C. Gwenlan;T. Haas;W. Hain;R. Hamatsu;J. Hart;H. Hartmann;G. Hartner;E. Hilger;D. Hochman;R. Hori;K. Horton;A. Hüttmann;Z. Ibrahim;Y. Iga;R. Ingbir;M. Ishitsuka;H.-P. Jakob;F. Januschek;T. Jones;M. Jüngst;I. Kadenko;B. Kahle;S. Kananov;T. Kanno;U. Karshon;F. Karstens;I. Katkov;M. Kaur;P. Kaur;A. Keramidas;L. Khein;J. Kim;D. Kisielewska;S. Kitamura;R. Klanner;U. Klein;E. Koffeman;N. Kondrashova;O. Kononenko;P. Kooijman;Ie. Korol;I. Korzhavina;A. Kotański;U. Kötz;H. Kowalski;O. Kuprash;M. Kuze;A. Lee;B. Levchenko;A. Levy;V. Libov;S. Limentani;T. Ling;M. Lisovyi;E. Lobodzinska;W. Lohmann;B. Löhr;E. Lohrmann;K. Long;A. Longhin;D. Lontkovskyi;O. Lukina;J. Maeda;S. Magill;I. Makarenko;J. Malka;R. Mankel;A. Margotti;G. Marini;J. Martin;A. Mastroberardino;M. Mattingly;I.-A. Melzer-Pellmann;S. Mergelmeyer;S. Miglioranzi;F. Mohamad dris;V. Monaco;A. Montanari;J. Morris;K. Mujkic;B. Musgrave;K. Nagano;T. Namsoo;R. Nania;A. Nigro;Y. Ning;T. Nobe;D. Notz;R. Nowak;A. Nuncio-Quiroz;B. Oh;N. Okazaki;K. Oliver;K. Olkiewicz;Yu. Onishchuk;K. Papageorgiu;A. Parenti;E. Paul;J. Pawlak;B. Pawlik;P. Pelfer;A. Pellegrino;W. Perlański;H. Perrey;K. Piotrzkowski;P. Pluciński;N. Pokrovskiy;A. Polini;A. Proskuryakov;M. Przybycień;A. Raval;D. Reeder;B. Reisert;Z. Ren;J. Repond;Y. Ri;A. Robertson;P. Roloff;I. Rubinsky;M. Ruspa;R. Sacchi;U. Samson;G. Sartorelli;A. Savin;D. Saxon;M. Schioppa;S. Schlenstedt;P. Schleper;W. Schmidke;U. Schneekloth;V. Schönberg;T. Schörner-Sadenius;J. Schwartz;F. Sciulli;L. Shcheglova;R. Shehzadi;S. Shimizu;I. Singh;I. Skillicorn;W. Słomiński;W. Smith;V. Sola;A. Solano;D. Son;V. Sosnovtsev;A. Spiridonov;H. Stadie;L. Stanco;N. Stefaniuk;A. Stern;T. Stewart;A. Stifutkin;P. Stopa;S. Suchkov;G. Susinno;L. Suszycki;J. Sztuk-Dambietz;D. Szuba;J. Szuba;A. Tapper;E. Tassi;J. Terrón;T. Theedt;H. Tiecke;K. Tokushuku;J. Tomaszewska;V. Trusov;T. Tsurugai;M. Turcato;O. Turkot;T. Tymieniecka;M. Vázquez;A. Verbytskyi;O. Viazlo;N. Vlasov;R. Walczak;W. Wan Abdullah;J. Whitmore;K. Wichmann;L. Wiggers;M. Wing;M. Wlasenko;G. Wolf;H. Wolfe;K. Wrona;A. Yagües-Molina;S. Yamada;Y. Yamazaki;R. Yoshida;C. Youngman;O. Zabiegalov;A. Żarnecki;L. Zawiejski;O. Zenaiev;W. Zeuner;B. Zhautykov;N. Zhmak;C. Zhou;A. Zichichi;Z. Zolkapli;D. Zotkin
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