A study of events containing two tau leptons with high transverse momentum has been performed with the ZEUS detector at HERA, using a data sample corresponding to an integrated luminosity of 0.33 fb(-1). The tau candidates were identified from their decays into electrons, muons or hadronic jets. The number of tau-pair candidates has been compared with the prediction from the Standard Model, where the largest contribution is expected from Bethe-Heitler processes. The total visible cross section was extracted. Standard Model expectations agree well with the measured distributions, also at high invariant mass of the tau pair.
Study of tau-pair production at HERA / H. ABRAMOWICZ; L. ADAMCZYK; M. ADAMUS; R. AGGARWA; S. ANTONELLI; P. ANTONIOLI; A. ANTONOV; M. ARNEODO; V. AUSHEV; Y. AUSHEV; O. BACHYNSKA; A. BAMBERGER; A.N. 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. BOLD; O. BOLILYI; K. BONDARENKO; E.G. BOOS; K. BORRAS; D. BOSCHERINI; D. BOT; I. BROCK; E. BROWNSON; R. BRUGNERA; N. BRÜMMER; A. BRUNI; G. BRUNI; B. BRZOZOWSKA; P.J. BUSSEY; B. BYLSMA; A. CALDWELL; M. CAPUA; R. CARLIN; C.D. CATTERALL; S. CHEKANOV; J. CHWASTOWSKI; J. CIBOROWSKI; R. CIESIELSKI; L. CIFARELLI; F. CINDOLO; A. CONTIN; A.M. COOPER-SARKAR; N. COPPOLA; M. CORRADI; F. CORRIVEAU; M. COSTA; G. D’AGOSTINI; F. DAL CORSO; J. DEL PESO; R.K. DEMENTIEV; S. DE PASQUALE; M. DERRICK; R.C.E. DEVENISH; D. DOBUR; B.A. DOLGOSHEIN; G. DOLINSKA; A.T. DOYLE; V. DRUGAKOV; L.S. DURKIN; S. DUSINI; Y. EISENBERG; P.F. ERMOLOV; A. ESKREYS; S. FANG; S. FAZIO; J. FERRANDO; M.I. FERRERO; J. FIGIEL; M. FORREST; B. FOSTER; S. FOURLETOV; G. GACH; A. GALAS; E. GALLO; A. GARFAGNINI; A. GEISER; I. GIALAS; L.K. GLADILIN; D. GLADKOV; C. GLASMAN; O. GOGOTA; YU.A. GOLUBKOV; P. GÖTTLICHER; I. GRABOWSKA-BOLD; J. GREBENYUK; I. GREGOR; G. GRIGORESCU; G. GRZELAK; O. GUETA; C. GWENLAN; T. HAAS; W. HAIN; R. HAMATSU; J.C. HART; H. HARTMANN; G. HARTNER; E. HILGER; D. HOCHMAN; R. HORI; K. HORTON; A. HÜTTMANN; Z.A. IBRAHIM; Y. IGA; R. INGBIR; M. ISHITSUKA; H.-P. JAKOB; F. JANUSCHEK; M. JIMENEZ; T.W. JONES; M. JÜNGST; I. KADENKO; B. KAHLE; B. KAMALUDDIN; S. KANANOV; T. KANNO; U. KARSHON; F. KARSTENS; I.I. KATKOV; M. KAUR; P. KAUR; A. KERAMIDAS; L.A. KHEIN; J.Y. KIM; D. KISIELEWSKA1; S. KITAMURA; R. KLANNER; U. KLEIN; E. KOFFEMAN; P. KOOIJMAN; I. KOROL; I.A. KORZHAVINA; A. KOTA´ NSKI; U. KÖTZ; H. KOWALSKI; P. KULINSKI; O. KUPRASH; M. KUZE; A. LEE; B.B. LEVCHENKO; A. LEVY; V. LIBOV; S. LIMENTANI; T.Y. LING; M. LISOVYI; E. LOBODZINSKA; W. LOHMANN; B. LÖHR; E. LOHRMANN; K.R. LONG; A. LONGHIN; D. LONTKOVSKYI; O.YU. LUKINA; P. LU?ZNIAK; J. MAEDA; S. MAGILL; I. MAKARENKO; J. MALKA; R. MANKEL; A. MARGOTTI; G. MARINI; J.F. MARTIN; A. MASTROBERARDINO; M.C.K. MATTINGLY; I.-A. MELZER-PELLMANN; S. MERGELMEYER; S. MIGLIORANZI; F. MOHAMAD IDRIS; V. MONACO; A. MONTANARI; J.D. MORRIS; K. MUJKIC; B. MUSGRAVE; K. NAGANO; T. NAMSOO; R. NANIA; D. NICHOLASS; A. NIGRO; Y. NING; T. NOBE; U. NOOR; D. NOTZ; R.J. NOWAK; A.E. NUNCIO-QUIROZ; B.Y. OH; N. OKAZAKI; K. OLIVER; K. OLKIEWICZ; YU. ONISHCHUK; K. PAPAGEORGIU; A. PARENTI; E. PAUL; J.M. PAWLAK; B. PAWLIK; P.G. PELFER; A. PELLEGRINO; W. PERLANSKI; H. PERREY; K. PIOTRZKOWSKI; P. PLUCINSKI; N.S. POKROVSKIY; A. POLINI; A.S. PROSKURYAKOV; M. PRZYBYCIE´N; A. RAVAL; D.D. REEDER; B. REISERT; Z. REN1; J. REPOND; Y.D. RI; A. ROBERTSON; P. ROLOFF; E. RON; I. RUBINSKY; M. RUSPA; R. SACCHI; A. SALII; U. SAMSON; G. SARTORELLI; A.A. SAVIN; D.H. SAXON; M. SCHIOPPA; S. SCHLENSTEDT; P. SCHLEPER; W.B. SCHMIDKE; U. SCHNEEKLOTH; V. SCHÖNBERG; T. SCHÖRNER-SADENIUS; J. SCHWARTZ; F. SCIULLI; L.M. SHCHEGLOVA; R. SHEHZADI; S. SHIMIZU; I. SINGH; I.O. SKILLICORN; W. SLOMI´ NSKI; W.H. SMITH; V. SOLA; A. SOLANO; D. SON; V. SOSNOVTSEV; A. SPIRIDONOV; H. STADIE; L. STANCO; A. STERN; T.P. STEWART; A. STIFUTKIN; P. STOPA; S. SUCHKOV; G. SUSINNO; L. SUSZYCKI; J. SZTUK-DAMBIETZ; D. SZUBA; J. SZUBA; A.D. TAPPER; E. TASSI; J. TERRÓN; T. THEEDT; H. TIECKE; K. TOKUSHUKU; O. TOMALAK; J. TOMASZEWSKA; T. TSURUGAI; M. TURCATO; T. TYMIENIECKA; C. URIBE-ESTRADA; M. VÁZQUEZ; A. VERBYTSKYI; O. VIAZLO; N.N. VLASOV; O. VOLYNETS; R.WALCZAK; W.A.T. WAN ABDULLAH; J.J.WHITMORE; J. WHYTE; L. WIGGERS; M. WING; M. WLASENKO; G. WOLF; H. WOLFE; K.WRONA; A.G. YAGÜES-MOLINA; S. YAMADA; Y. YAMAZAKI; R. YOSHIDA; C. YOUNGMAN; A.F. ZARNECKI; L. ZAWIEJSKI; O. ZENAIEV; W. ZEUNER; B.O. ZHAUTYKOV; N. ZHMAK; C. ZHOU; A. ZICHICHI; M. ZOLKO; D.S. ZOTKIN; Z. ZULKAPLI. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - STAMPA. - 1102:(2011), pp. 117-1-117-23. [10.1007/JHEP02(2011)117]
Study of tau-pair production at HERA.
BASILE, MAURIZIO;CIFARELLI, LUISA;CONTIN, ANDREA;SARTORELLI, GABRIELLA;
2011
Abstract
A study of events containing two tau leptons with high transverse momentum has been performed with the ZEUS detector at HERA, using a data sample corresponding to an integrated luminosity of 0.33 fb(-1). The tau candidates were identified from their decays into electrons, muons or hadronic jets. The number of tau-pair candidates has been compared with the prediction from the Standard Model, where the largest contribution is expected from Bethe-Heitler processes. The total visible cross section was extracted. Standard Model expectations agree well with the measured distributions, also at high invariant mass of the tau pair.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.